diff options
Diffstat (limited to 'nsprpub/pr/src/md/windows/ntio.c')
| -rw-r--r-- | nsprpub/pr/src/md/windows/ntio.c | 4761 |
1 files changed, 4761 insertions, 0 deletions
diff --git a/nsprpub/pr/src/md/windows/ntio.c b/nsprpub/pr/src/md/windows/ntio.c new file mode 100644 index 0000000000..40f5200789 --- /dev/null +++ b/nsprpub/pr/src/md/windows/ntio.c @@ -0,0 +1,4761 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +/* Windows NT IO module + * + * This module handles IO for LOCAL_SCOPE and GLOBAL_SCOPE threads. + * For LOCAL_SCOPE threads, we're using NT fibers. For GLOBAL_SCOPE threads + * we're using NT-native threads. + * + * When doing IO, we want to use completion ports for optimal performance + * with fibers. But if we use completion ports for all IO, it is difficult + * to project a blocking model with GLOBAL_SCOPE threads. To handle this + * we create an extra thread for completing IO for GLOBAL_SCOPE threads. + * We don't really want to complete IO on a separate thread for LOCAL_SCOPE + * threads because it means extra context switches, which are really slow + * on NT... Since we're using a single completion port, some IO will + * be incorrectly completed on the GLOBAL_SCOPE IO thread; this will mean + * extra context switching; but I don't think there is anything I can do + * about it. + */ + +#include "primpl.h" +#include "pprmwait.h" +#include <direct.h> +#include <mbstring.h> + +static HANDLE _pr_completion_port; +static PRThread *_pr_io_completion_thread; + +#define RECYCLE_SIZE 512 +static struct _MDLock _pr_recycle_lock; +static PRInt32 _pr_recycle_INET_array[RECYCLE_SIZE]; +static PRInt32 _pr_recycle_INET_tail = 0; +static PRInt32 _pr_recycle_INET6_array[RECYCLE_SIZE]; +static PRInt32 _pr_recycle_INET6_tail = 0; + +__declspec(thread) PRThread *_pr_io_restarted_io = NULL; +DWORD _pr_io_restartedIOIndex; /* The thread local storage slot for each + * thread is initialized to NULL. */ + +PRBool _nt_version_gets_lockfile_completion; + +struct _MDLock _pr_ioq_lock; +extern _MDLock _nt_idleLock; +extern PRCList _nt_idleList; +extern PRUint32 _nt_idleCount; + +#define CLOSE_TIMEOUT PR_SecondsToInterval(5) + +/* + * NSPR-to-NT access right mapping table for files. + */ +static DWORD fileAccessTable[] = { + FILE_GENERIC_READ, + FILE_GENERIC_WRITE, + FILE_GENERIC_EXECUTE +}; + +/* + * NSPR-to-NT access right mapping table for directories. + */ +static DWORD dirAccessTable[] = { + FILE_GENERIC_READ, + FILE_GENERIC_WRITE|FILE_DELETE_CHILD, + FILE_GENERIC_EXECUTE +}; + +static PRBool IsPrevCharSlash(const char *str, const char *current); + +#define _NEED_351_FILE_LOCKING_HACK +#ifdef _NEED_351_FILE_LOCKING_HACK +#define _PR_LOCAL_FILE 1 +#define _PR_REMOTE_FILE 2 +PRBool IsFileLocalInit(); +PRInt32 IsFileLocal(HANDLE hFile); +#endif /* _NEED_351_FILE_LOCKING_HACK */ + +static PRInt32 _md_MakeNonblock(HANDLE); + +static PROsfd _nt_nonblock_accept(PRFileDesc *fd, struct sockaddr *addr, int *addrlen, PRIntervalTime); +static PRInt32 _nt_nonblock_connect(PRFileDesc *fd, struct sockaddr *addr, int addrlen, PRIntervalTime); +static PRInt32 _nt_nonblock_recv(PRFileDesc *fd, char *buf, int len, int flags, PRIntervalTime); +static PRInt32 _nt_nonblock_send(PRFileDesc *fd, char *buf, int len, PRIntervalTime); +static PRInt32 _nt_nonblock_writev(PRFileDesc *fd, const PRIOVec *iov, int size, PRIntervalTime); +static PRInt32 _nt_nonblock_sendto(PRFileDesc *, const char *, int, const struct sockaddr *, int, PRIntervalTime); +static PRInt32 _nt_nonblock_recvfrom(PRFileDesc *, char *, int, struct sockaddr *, int *, PRIntervalTime); + +/* + * We cannot associate a fd (a socket) with an I/O completion port + * if the fd is nonblocking or inheritable. + * + * Nonblocking socket I/O won't work if the socket is associated with + * an I/O completion port. + * + * An inheritable fd cannot be associated with an I/O completion port + * because the completion notification of async I/O initiated by the + * child process is still posted to the I/O completion port in the + * parent process. + */ +#define _NT_USE_NB_IO(fd) \ + ((fd)->secret->nonblocking || (fd)->secret->inheritable == _PR_TRI_TRUE) + +/* + * UDP support + * + * UDP is supported on NT by the continuation thread mechanism. + * The code is borrowed from ptio.c in pthreads nspr, hence the + * PT and pt prefixes. This mechanism is in fact general and + * not limited to UDP. For now, only UDP's recvfrom and sendto + * go through the continuation thread if they get WSAEWOULDBLOCK + * on first try. Recv and send on a connected UDP socket still + * goes through asychronous io. + */ + +#define PT_DEFAULT_SELECT_MSEC 100 + +typedef struct pt_Continuation pt_Continuation; +typedef PRBool (*ContinuationFn)(pt_Continuation *op, PRInt16 revent); + +typedef enum pr_ContuationStatus +{ + pt_continuation_sumbitted, + pt_continuation_inprogress, + pt_continuation_abort, + pt_continuation_done +} pr_ContuationStatus; + +struct pt_Continuation +{ + /* These objects are linked in ascending timeout order */ + pt_Continuation *next, *prev; /* self linked list of these things */ + + /* The building of the continuation operation */ + ContinuationFn function; /* what function to continue */ + union { + SOCKET osfd; + } arg1; /* #1 - the op's fd */ + union { + void* buffer; + } arg2; /* #2 - primary transfer buffer */ + union { + PRIntn amount; + } arg3; /* #3 - size of 'buffer' */ + union { + PRIntn flags; + } arg4; /* #4 - read/write flags */ + union { + PRNetAddr *addr; + } arg5; /* #5 - send/recv address */ + + PRIntervalTime timeout; /* representation of the timeout */ + + PRIntn event; /* flags for select()'s events */ + + /* + ** The representation and notification of the results of the operation. + ** These function can either return an int return code or a pointer to + ** some object. + */ + union { + PRIntn code; + void *object; + } result; + + PRIntn syserrno; /* in case it failed, why (errno) */ + pr_ContuationStatus status; /* the status of the operation */ + PRCondVar *complete; /* to notify the initiating thread */ +}; + +static struct pt_TimedQueue +{ + PRLock *ml; /* a little protection */ + PRThread *thread; /* internal thread's identification */ + PRCondVar *new_op; /* new operation supplied */ + PRCondVar *finish_op; /* an existing operation finished */ + PRUintn op_count; /* number of operations in the list */ + pt_Continuation *head, *tail; /* head/tail of list of operations */ + + pt_Continuation *op; /* timed operation furthest in future */ + PRIntervalTime epoch; /* the epoch of 'timed' */ +} pt_tq; + +#if defined(DEBUG) +static struct pt_debug_s +{ + PRIntn predictionsFoiled; + PRIntn pollingListMax; + PRIntn continuationsServed; +} pt_debug; +#endif /* DEBUG */ + +static void ContinuationThread(void *arg); +static PRInt32 pt_SendTo( + SOCKET osfd, const void *buf, + PRInt32 amount, PRInt32 flags, const PRNetAddr *addr, + PRIntn addrlen, PRIntervalTime timeout); +static PRInt32 pt_RecvFrom(SOCKET osfd, void *buf, PRInt32 amount, + PRInt32 flags, PRNetAddr *addr, PRIntn *addr_len, PRIntervalTime timeout); + + +/* The key returned from GetQueuedCompletionStatus() is used to determine what + * type of completion we have. We differentiate between IO completions and + * CVAR completions. + */ +#define KEY_IO 0xaaaaaaaa +#define KEY_CVAR 0xbbbbbbbb + +PRInt32 +_PR_MD_PAUSE_CPU(PRIntervalTime ticks) +{ + int awoken = 0; + unsigned long bytes, key; + int rv; + LPOVERLAPPED olp; + _MDOverlapped *mdOlp; + PRUint32 timeout; + + if (_nt_idleCount > 0) { + PRThread *deadThread; + + _MD_LOCK(&_nt_idleLock); + while( !PR_CLIST_IS_EMPTY(&_nt_idleList) ) { + deadThread = _PR_THREAD_PTR(PR_LIST_HEAD(&_nt_idleList)); + PR_REMOVE_LINK(&deadThread->links); + + PR_ASSERT(deadThread->state == _PR_DEAD_STATE); + + /* XXXMB - cleanup to do here? */ + if ( !_PR_IS_NATIVE_THREAD(deadThread) ) { + /* Spinlock while user thread is still running. + * There is no way to use a condition variable here. The thread + * is dead, and we have to wait until we switch off the dead + * thread before we can kill the fiber completely. + */ + while ( deadThread->no_sched) + ; + + DeleteFiber(deadThread->md.fiber_id); + } + memset(deadThread, 0xa, sizeof(PRThread)); /* debugging */ + if (!deadThread->threadAllocatedOnStack) { + PR_DELETE(deadThread); + } + _nt_idleCount--; + } + _MD_UNLOCK(&_nt_idleLock); + } + + if (ticks == PR_INTERVAL_NO_TIMEOUT) +#if 0 + timeout = INFINITE; +#else + /* + * temporary hack to poll the runq every 5 seconds because of bug in + * native threads creating user threads and not poking the right cpu. + * + * A local thread that was interrupted is bound to its current + * cpu but there is no easy way for the interrupter to poke the + * right cpu. This is a hack to poll the runq every 5 seconds. + */ + timeout = 5000; +#endif + else { + timeout = PR_IntervalToMilliseconds(ticks); + } + + /* + * The idea of looping here is to complete as many IOs as possible before + * returning. This should minimize trips to the idle thread. + */ + while(1) { + rv = GetQueuedCompletionStatus( + _pr_completion_port, + &bytes, + &key, + &olp, + timeout); + if (rv == 0 && olp == NULL) { + /* Error in GetQueuedCompetionStatus */ + if (GetLastError() != WAIT_TIMEOUT) { + /* ARGH - what can we do here? Log an error? XXXMB */ + return -1; + } else { + /* If awoken == 0, then we just had a timeout */ + return awoken; + } + } + + if (olp == NULL) { + return 0; + } + + mdOlp = (_MDOverlapped *)olp; + + if (mdOlp->ioModel == _MD_MultiWaitIO) { + PRRecvWait *desc; + PRWaitGroup *group; + PRThread *thred = NULL; + PRMWStatus mwstatus; + + desc = mdOlp->data.mw.desc; + PR_ASSERT(desc != NULL); + mwstatus = rv ? PR_MW_SUCCESS : PR_MW_FAILURE; + if (InterlockedCompareExchange((PVOID *)&desc->outcome, + (PVOID)mwstatus, (PVOID)PR_MW_PENDING) + == (PVOID)PR_MW_PENDING) { + if (mwstatus == PR_MW_SUCCESS) { + desc->bytesRecv = bytes; + } else { + mdOlp->data.mw.error = GetLastError(); + } + } + group = mdOlp->data.mw.group; + PR_ASSERT(group != NULL); + + _PR_MD_LOCK(&group->mdlock); + PR_APPEND_LINK(&mdOlp->data.mw.links, &group->io_ready); + PR_ASSERT(desc->fd != NULL); + NT_HashRemoveInternal(group, desc->fd); + if (!PR_CLIST_IS_EMPTY(&group->wait_list)) { + thred = _PR_THREAD_CONDQ_PTR(PR_LIST_HEAD(&group->wait_list)); + PR_REMOVE_LINK(&thred->waitQLinks); + } + _PR_MD_UNLOCK(&group->mdlock); + + if (thred) { + if (!_PR_IS_NATIVE_THREAD(thred)) { + int pri = thred->priority; + _PRCPU *lockedCPU = _PR_MD_CURRENT_CPU(); + _PR_THREAD_LOCK(thred); + if (thred->flags & _PR_ON_PAUSEQ) { + _PR_SLEEPQ_LOCK(thred->cpu); + _PR_DEL_SLEEPQ(thred, PR_TRUE); + _PR_SLEEPQ_UNLOCK(thred->cpu); + _PR_THREAD_UNLOCK(thred); + thred->cpu = lockedCPU; + thred->state = _PR_RUNNABLE; + _PR_RUNQ_LOCK(lockedCPU); + _PR_ADD_RUNQ(thred, lockedCPU, pri); + _PR_RUNQ_UNLOCK(lockedCPU); + } else { + /* + * The thread was just interrupted and moved + * from the pause queue to the run queue. + */ + _PR_THREAD_UNLOCK(thred); + } + } else { + _PR_THREAD_LOCK(thred); + thred->state = _PR_RUNNABLE; + _PR_THREAD_UNLOCK(thred); + ReleaseSemaphore(thred->md.blocked_sema, 1, NULL); + } + } + } else { + PRThread *completed_io; + + PR_ASSERT(mdOlp->ioModel == _MD_BlockingIO); + completed_io = _PR_THREAD_MD_TO_PTR(mdOlp->data.mdThread); + completed_io->md.blocked_io_status = rv; + if (rv == 0) { + completed_io->md.blocked_io_error = GetLastError(); + } + completed_io->md.blocked_io_bytes = bytes; + + if ( !_PR_IS_NATIVE_THREAD(completed_io) ) { + int pri = completed_io->priority; + _PRCPU *lockedCPU = _PR_MD_CURRENT_CPU(); + + /* The KEY_CVAR notification only occurs when a native thread + * is notifying a user thread. For user-user notifications + * the wakeup occurs by having the notifier place the thread + * on the runq directly; for native-native notifications the + * wakeup occurs by calling ReleaseSemaphore. + */ + if ( key == KEY_CVAR ) { + PR_ASSERT(completed_io->io_pending == PR_FALSE); + PR_ASSERT(completed_io->io_suspended == PR_FALSE); + PR_ASSERT(completed_io->md.thr_bound_cpu == NULL); + + /* Thread has already been deleted from sleepQ */ + + /* Switch CPU and add to runQ */ + completed_io->cpu = lockedCPU; + completed_io->state = _PR_RUNNABLE; + _PR_RUNQ_LOCK(lockedCPU); + _PR_ADD_RUNQ(completed_io, lockedCPU, pri); + _PR_RUNQ_UNLOCK(lockedCPU); + } else { + PR_ASSERT(key == KEY_IO); + PR_ASSERT(completed_io->io_pending == PR_TRUE); + + _PR_THREAD_LOCK(completed_io); + + completed_io->io_pending = PR_FALSE; + + /* If io_suspended is true, then this IO has already resumed. + * We don't need to do anything; because the thread is + * already running. + */ + if (completed_io->io_suspended == PR_FALSE) { + if (completed_io->flags & (_PR_ON_SLEEPQ|_PR_ON_PAUSEQ)) { + _PR_SLEEPQ_LOCK(completed_io->cpu); + _PR_DEL_SLEEPQ(completed_io, PR_TRUE); + _PR_SLEEPQ_UNLOCK(completed_io->cpu); + + _PR_THREAD_UNLOCK(completed_io); + + /* + * If an I/O operation is suspended, the thread + * must be running on the same cpu on which the + * I/O operation was issued. + */ + PR_ASSERT(!completed_io->md.thr_bound_cpu || + (completed_io->cpu == completed_io->md.thr_bound_cpu)); + + if (!completed_io->md.thr_bound_cpu) { + completed_io->cpu = lockedCPU; + } + completed_io->state = _PR_RUNNABLE; + _PR_RUNQ_LOCK(completed_io->cpu); + _PR_ADD_RUNQ(completed_io, completed_io->cpu, pri); + _PR_RUNQ_UNLOCK(completed_io->cpu); + } else { + _PR_THREAD_UNLOCK(completed_io); + } + } else { + _PR_THREAD_UNLOCK(completed_io); + } + } + } else { + /* For native threads, they are only notified through this loop + * when completing IO. So, don't worry about this being a CVAR + * notification, because that is not possible. + */ + _PR_THREAD_LOCK(completed_io); + completed_io->io_pending = PR_FALSE; + if (completed_io->io_suspended == PR_FALSE) { + completed_io->state = _PR_RUNNABLE; + _PR_THREAD_UNLOCK(completed_io); + rv = ReleaseSemaphore(completed_io->md.blocked_sema, + 1, NULL); + PR_ASSERT(0 != rv); + } else { + _PR_THREAD_UNLOCK(completed_io); + } + } + } + + awoken++; + timeout = 0; /* Don't block on subsequent trips through the loop */ + } + + /* never reached */ + return 0; +} + +static PRStatus +_native_thread_md_wait(PRThread *thread, PRIntervalTime ticks) +{ + DWORD rv; + PRUint32 msecs = (ticks == PR_INTERVAL_NO_TIMEOUT) ? + INFINITE : PR_IntervalToMilliseconds(ticks); + + /* + * thread waiting for a cvar or a joining thread + */ + rv = WaitForSingleObject(thread->md.blocked_sema, msecs); + switch(rv) { + case WAIT_OBJECT_0: + return PR_SUCCESS; + break; + case WAIT_TIMEOUT: + _PR_THREAD_LOCK(thread); + PR_ASSERT (thread->state != _PR_IO_WAIT); + if (thread->wait.cvar != NULL) { + PR_ASSERT(thread->state == _PR_COND_WAIT); + thread->wait.cvar = NULL; + thread->state = _PR_RUNNING; + _PR_THREAD_UNLOCK(thread); + } else { + /* The CVAR was notified just as the timeout + * occurred. This left the semaphore in the + * signaled state. Call WaitForSingleObject() + * to clear the semaphore. + */ + _PR_THREAD_UNLOCK(thread); + rv = WaitForSingleObject(thread->md.blocked_sema, INFINITE); + PR_ASSERT(rv == WAIT_OBJECT_0); + } + return PR_SUCCESS; + break; + default: + return PR_FAILURE; + break; + } + + return PR_SUCCESS; +} + +PRStatus +_PR_MD_WAIT(PRThread *thread, PRIntervalTime ticks) +{ + DWORD rv; + + if (_native_threads_only) { + return(_native_thread_md_wait(thread, ticks)); + } + if ( thread->flags & _PR_GLOBAL_SCOPE ) { + PRUint32 msecs = (ticks == PR_INTERVAL_NO_TIMEOUT) ? + INFINITE : PR_IntervalToMilliseconds(ticks); + rv = WaitForSingleObject(thread->md.blocked_sema, msecs); + switch(rv) { + case WAIT_OBJECT_0: + return PR_SUCCESS; + break; + case WAIT_TIMEOUT: + _PR_THREAD_LOCK(thread); + if (thread->state == _PR_IO_WAIT) { + if (thread->io_pending == PR_TRUE) { + thread->state = _PR_RUNNING; + thread->io_suspended = PR_TRUE; + _PR_THREAD_UNLOCK(thread); + } else { + /* The IO completed just at the same time the timeout + * occurred. This left the semaphore in the signaled + * state. Call WaitForSingleObject() to clear the + * semaphore. + */ + _PR_THREAD_UNLOCK(thread); + rv = WaitForSingleObject(thread->md.blocked_sema, INFINITE); + PR_ASSERT(rv == WAIT_OBJECT_0); + } + } else { + if (thread->wait.cvar != NULL) { + PR_ASSERT(thread->state == _PR_COND_WAIT); + thread->wait.cvar = NULL; + thread->state = _PR_RUNNING; + _PR_THREAD_UNLOCK(thread); + } else { + /* The CVAR was notified just as the timeout + * occurred. This left the semaphore in the + * signaled state. Call WaitForSingleObject() + * to clear the semaphore. + */ + _PR_THREAD_UNLOCK(thread); + rv = WaitForSingleObject(thread->md.blocked_sema, INFINITE); + PR_ASSERT(rv == WAIT_OBJECT_0); + } + } + return PR_SUCCESS; + break; + default: + return PR_FAILURE; + break; + } + } else { + PRInt32 is; + + _PR_INTSOFF(is); + _PR_MD_SWITCH_CONTEXT(thread); + } + + return PR_SUCCESS; +} + +static void +_native_thread_io_nowait( + PRThread *thread, + int rv, + int bytes) +{ + int rc; + + PR_ASSERT(rv != 0); + _PR_THREAD_LOCK(thread); + if (thread->state == _PR_IO_WAIT) { + PR_ASSERT(thread->io_suspended == PR_FALSE); + PR_ASSERT(thread->io_pending == PR_TRUE); + thread->state = _PR_RUNNING; + thread->io_pending = PR_FALSE; + _PR_THREAD_UNLOCK(thread); + } else { + /* The IO completed just at the same time the + * thread was interrupted. This left the semaphore + * in the signaled state. Call WaitForSingleObject() + * to clear the semaphore. + */ + PR_ASSERT(thread->io_suspended == PR_TRUE); + PR_ASSERT(thread->io_pending == PR_TRUE); + thread->io_pending = PR_FALSE; + _PR_THREAD_UNLOCK(thread); + rc = WaitForSingleObject(thread->md.blocked_sema, INFINITE); + PR_ASSERT(rc == WAIT_OBJECT_0); + } + + thread->md.blocked_io_status = rv; + thread->md.blocked_io_bytes = bytes; + rc = ResetEvent(thread->md.thr_event); + PR_ASSERT(rc != 0); + return; +} + +static PRStatus +_native_thread_io_wait(PRThread *thread, PRIntervalTime ticks) +{ + DWORD rv, bytes; +#define _NATIVE_IO_WAIT_HANDLES 2 +#define _NATIVE_WAKEUP_EVENT_INDEX 0 +#define _NATIVE_IO_EVENT_INDEX 1 + + HANDLE wait_handles[_NATIVE_IO_WAIT_HANDLES]; + + PRUint32 msecs = (ticks == PR_INTERVAL_NO_TIMEOUT) ? + INFINITE : PR_IntervalToMilliseconds(ticks); + + PR_ASSERT(thread->flags & _PR_GLOBAL_SCOPE); + + wait_handles[0] = thread->md.blocked_sema; + wait_handles[1] = thread->md.thr_event; + rv = WaitForMultipleObjects(_NATIVE_IO_WAIT_HANDLES, wait_handles, + FALSE, msecs); + + switch(rv) { + case WAIT_OBJECT_0 + _NATIVE_IO_EVENT_INDEX: + /* + * I/O op completed + */ + _PR_THREAD_LOCK(thread); + if (thread->state == _PR_IO_WAIT) { + + PR_ASSERT(thread->io_suspended == PR_FALSE); + PR_ASSERT(thread->io_pending == PR_TRUE); + thread->state = _PR_RUNNING; + thread->io_pending = PR_FALSE; + _PR_THREAD_UNLOCK(thread); + } else { + /* The IO completed just at the same time the + * thread was interrupted. This led to us being + * notified twice. Call WaitForSingleObject() + * to clear the semaphore. + */ + PR_ASSERT(thread->io_suspended == PR_TRUE); + PR_ASSERT(thread->io_pending == PR_TRUE); + thread->io_pending = PR_FALSE; + _PR_THREAD_UNLOCK(thread); + rv = WaitForSingleObject(thread->md.blocked_sema, + INFINITE); + PR_ASSERT(rv == WAIT_OBJECT_0); + } + + rv = GetOverlappedResult((HANDLE) thread->io_fd, + &thread->md.overlapped.overlapped, &bytes, FALSE); + + thread->md.blocked_io_status = rv; + if (rv != 0) { + thread->md.blocked_io_bytes = bytes; + } else { + thread->md.blocked_io_error = GetLastError(); + PR_ASSERT(ERROR_IO_PENDING != thread->md.blocked_io_error); + } + rv = ResetEvent(thread->md.thr_event); + PR_ASSERT(rv != 0); + break; + case WAIT_OBJECT_0 + _NATIVE_WAKEUP_EVENT_INDEX: + /* + * I/O interrupted; + */ +#ifdef DEBUG + _PR_THREAD_LOCK(thread); + PR_ASSERT(thread->io_suspended == PR_TRUE); + _PR_THREAD_UNLOCK(thread); +#endif + break; + case WAIT_TIMEOUT: + _PR_THREAD_LOCK(thread); + if (thread->state == _PR_IO_WAIT) { + thread->state = _PR_RUNNING; + thread->io_suspended = PR_TRUE; + _PR_THREAD_UNLOCK(thread); + } else { + /* + * The thread was interrupted just as the timeout + * occurred. This left the semaphore in the signaled + * state. Call WaitForSingleObject() to clear the + * semaphore. + */ + PR_ASSERT(thread->io_suspended == PR_TRUE); + _PR_THREAD_UNLOCK(thread); + rv = WaitForSingleObject(thread->md.blocked_sema, INFINITE); + PR_ASSERT(rv == WAIT_OBJECT_0); + } + break; + default: + return PR_FAILURE; + break; + } + + return PR_SUCCESS; +} + + +static PRStatus +_NT_IO_WAIT(PRThread *thread, PRIntervalTime timeout) +{ + PRBool fWait = PR_TRUE; + + if (_native_threads_only) { + return(_native_thread_io_wait(thread, timeout)); + } + if (!_PR_IS_NATIVE_THREAD(thread)) { + + _PR_THREAD_LOCK(thread); + + /* The IO may have already completed; if so, don't add to sleepQ, + * since we are already on the runQ! + */ + if (thread->io_pending == PR_TRUE) { + _PR_SLEEPQ_LOCK(thread->cpu); + _PR_ADD_SLEEPQ(thread, timeout); + _PR_SLEEPQ_UNLOCK(thread->cpu); + } else { + fWait = PR_FALSE; + } + _PR_THREAD_UNLOCK(thread); + } + if (fWait) { + return _PR_MD_WAIT(thread, timeout); + } + else { + return PR_SUCCESS; + } +} + +/* + * Unblock threads waiting for I/O + * used when interrupting threads + * + * NOTE: The thread lock should held when this function is called. + * On return, the thread lock is released. + */ +void _PR_Unblock_IO_Wait(PRThread *thr) +{ + PRStatus rv; + _PRCPU *cpu = thr->cpu; + + PR_ASSERT(thr->state == _PR_IO_WAIT); + /* + * A thread for which an I/O timed out or was interrupted cannot be + * in an IO_WAIT state except as a result of calling PR_Close or + * PR_NT_CancelIo for the FD. For these two cases, _PR_IO_WAIT state + * is not interruptible + */ + if (thr->md.interrupt_disabled == PR_TRUE) { + _PR_THREAD_UNLOCK(thr); + return; + } + thr->io_suspended = PR_TRUE; + thr->state = _PR_RUNNABLE; + + if (!_PR_IS_NATIVE_THREAD(thr)) { + PRThread *me = _PR_MD_CURRENT_THREAD(); + PR_ASSERT(thr->flags & (_PR_ON_SLEEPQ | _PR_ON_PAUSEQ)); + _PR_SLEEPQ_LOCK(cpu); + _PR_DEL_SLEEPQ(thr, PR_TRUE); + _PR_SLEEPQ_UNLOCK(cpu); + /* + * this thread will continue to run on the same cpu until the + * I/O is aborted by closing the FD or calling CancelIO + */ + thr->md.thr_bound_cpu = cpu; + + PR_ASSERT(!(thr->flags & _PR_IDLE_THREAD)); + _PR_AddThreadToRunQ(me, thr); + } + _PR_THREAD_UNLOCK(thr); + rv = _PR_MD_WAKEUP_WAITER(thr); + PR_ASSERT(PR_SUCCESS == rv); +} + +/* Resume an outstanding IO; requires that after the switch, we disable */ +static PRStatus +_NT_ResumeIO(PRThread *thread, PRIntervalTime ticks) +{ + PRBool fWait = PR_TRUE; + + if (!_PR_IS_NATIVE_THREAD(thread)) { + if (_pr_use_static_tls) { + _pr_io_restarted_io = thread; + } else { + TlsSetValue(_pr_io_restartedIOIndex, thread); + } + } else { + _PR_THREAD_LOCK(thread); + if (!thread->io_pending) { + fWait = PR_FALSE; + } + thread->io_suspended = PR_FALSE; + + _PR_THREAD_UNLOCK(thread); + } + /* We don't put ourselves back on the sleepQ yet; until we + * set the suspended bit to false, we can't do that. Just save + * the sleep time here, and then continue. The restarted_io handler + * will add us to the sleepQ if needed. + */ + thread->sleep = ticks; + + if (fWait) { + if (!_PR_IS_NATIVE_THREAD(thread)) { + return _PR_MD_WAIT(thread, ticks); + } + else { + return _NT_IO_WAIT(thread, ticks); + } + } + return PR_SUCCESS; +} + +PRStatus +_PR_MD_WAKEUP_WAITER(PRThread *thread) +{ + if (thread == NULL) { + /* If thread is NULL, we aren't waking a thread, we're just poking + * idle thread + */ + if ( PostQueuedCompletionStatus(_pr_completion_port, 0, + KEY_CVAR, NULL) == FALSE) { + return PR_FAILURE; + } + return PR_SUCCESS; + } + + if ( _PR_IS_NATIVE_THREAD(thread) ) { + if (ReleaseSemaphore(thread->md.blocked_sema, 1, NULL) == FALSE) { + return PR_FAILURE; + } + else { + return PR_SUCCESS; + } + } else { + PRThread *me = _PR_MD_CURRENT_THREAD(); + + /* When a Native thread has to awaken a user thread, it has to poke + * the completion port because all user threads might be idle, and + * thus the CPUs are just waiting for a completion. + * + * XXXMB - can we know when we are truely idle (and not checking + * the runq)? + */ + if ((_PR_IS_NATIVE_THREAD(me) || (thread->cpu != me->cpu)) && + (!thread->md.thr_bound_cpu)) { + /* The thread should not be in any queue */ + PR_ASSERT(thread->queueCount == 0); + if ( PostQueuedCompletionStatus(_pr_completion_port, 0, + KEY_CVAR, &(thread->md.overlapped.overlapped)) == FALSE) { + return PR_FAILURE; + } + } + return PR_SUCCESS; + } +} + +void +_PR_MD_INIT_IO() +{ + WORD WSAVersion = 0x0101; + WSADATA WSAData; + int err; + OSVERSIONINFO OSversion; + + err = WSAStartup( WSAVersion, &WSAData ); + PR_ASSERT(0 == err); + + _pr_completion_port = CreateIoCompletionPort(INVALID_HANDLE_VALUE, + NULL, + 0, + 0); + + _MD_NEW_LOCK(&_pr_recycle_lock); + _MD_NEW_LOCK(&_pr_ioq_lock); + + OSversion.dwOSVersionInfoSize = sizeof(OSVERSIONINFO); + if (GetVersionEx(&OSversion)) { + _nt_version_gets_lockfile_completion = PR_FALSE; + if (OSversion.dwMajorVersion >= 4) { + _nt_version_gets_lockfile_completion = PR_TRUE; + } + } else { + PR_ASSERT(0); + } + +#ifdef _NEED_351_FILE_LOCKING_HACK + IsFileLocalInit(); +#endif /* _NEED_351_FILE_LOCKING_HACK */ + + /* + * UDP support: start up the continuation thread + */ + + pt_tq.op_count = 0; + pt_tq.head = pt_tq.tail = NULL; + pt_tq.ml = PR_NewLock(); + PR_ASSERT(NULL != pt_tq.ml); + pt_tq.new_op = PR_NewCondVar(pt_tq.ml); + PR_ASSERT(NULL != pt_tq.new_op); +#if defined(DEBUG) + memset(&pt_debug, 0, sizeof(struct pt_debug_s)); +#endif + + pt_tq.thread = PR_CreateThread( + PR_SYSTEM_THREAD, ContinuationThread, NULL, + PR_PRIORITY_URGENT, PR_GLOBAL_THREAD, PR_JOINABLE_THREAD, 0); + + PR_ASSERT(NULL != pt_tq.thread); + +#ifdef DEBUG + /* Doublecheck _pr_filetime_offset's hard-coded value is correct. */ + { + SYSTEMTIME systime; + union { + PRTime prt; + FILETIME ft; + } filetime; + BOOL rv; + + systime.wYear = 1970; + systime.wMonth = 1; + /* wDayOfWeek is ignored */ + systime.wDay = 1; + systime.wHour = 0; + systime.wMinute = 0; + systime.wSecond = 0; + systime.wMilliseconds = 0; + + rv = SystemTimeToFileTime(&systime, &filetime.ft); + PR_ASSERT(0 != rv); + PR_ASSERT(filetime.prt == _pr_filetime_offset); + } +#endif /* DEBUG */ + + _PR_NT_InitSids(); +} + +/* --- SOCKET IO --------------------------------------------------------- */ + +/* _md_get_recycled_socket() + * Get a socket from the recycle bin; if no sockets are in the bin, + * create one. The socket will be passed to AcceptEx() as the + * second argument. + */ +static SOCKET +_md_get_recycled_socket(int af) +{ + SOCKET rv; + + _MD_LOCK(&_pr_recycle_lock); + if (af == AF_INET && _pr_recycle_INET_tail) { + _pr_recycle_INET_tail--; + rv = _pr_recycle_INET_array[_pr_recycle_INET_tail]; + _MD_UNLOCK(&_pr_recycle_lock); + return rv; + } + if (af == AF_INET6 && _pr_recycle_INET6_tail) { + _pr_recycle_INET6_tail--; + rv = _pr_recycle_INET6_array[_pr_recycle_INET6_tail]; + _MD_UNLOCK(&_pr_recycle_lock); + return rv; + } + _MD_UNLOCK(&_pr_recycle_lock); + + rv = _PR_MD_SOCKET(af, SOCK_STREAM, 0); + if (rv != INVALID_SOCKET && _md_Associate((HANDLE)rv) == 0) { + closesocket(rv); + return INVALID_SOCKET; + } + return rv; +} + +/* _md_put_recycled_socket() + * Add a socket to the recycle bin. + */ +static void +_md_put_recycled_socket(SOCKET newsock, int af) +{ + PR_ASSERT(_pr_recycle_INET_tail >= 0); + PR_ASSERT(_pr_recycle_INET6_tail >= 0); + + _MD_LOCK(&_pr_recycle_lock); + if (af == AF_INET && _pr_recycle_INET_tail < RECYCLE_SIZE) { + _pr_recycle_INET_array[_pr_recycle_INET_tail] = newsock; + _pr_recycle_INET_tail++; + _MD_UNLOCK(&_pr_recycle_lock); + } else if (af == AF_INET6 && _pr_recycle_INET6_tail < RECYCLE_SIZE) { + _pr_recycle_INET6_array[_pr_recycle_INET6_tail] = newsock; + _pr_recycle_INET6_tail++; + _MD_UNLOCK(&_pr_recycle_lock); + } else { + _MD_UNLOCK(&_pr_recycle_lock); + closesocket(newsock); + } + + return; +} + +/* _md_Associate() + * Associates a file with the completion port. + * Returns 0 on failure, 1 on success. + */ +PRInt32 +_md_Associate(HANDLE file) +{ + HANDLE port; + + if (!_native_threads_only) { + port = CreateIoCompletionPort((HANDLE)file, + _pr_completion_port, + KEY_IO, + 0); + + /* XXX should map error codes on failures */ + return (port == _pr_completion_port); + } else { + return 1; + } +} + +/* + * _md_MakeNonblock() + * Make a socket nonblocking. + * Returns 0 on failure, 1 on success. + */ +static PRInt32 +_md_MakeNonblock(HANDLE file) +{ + int rv; + u_long one = 1; + + rv = ioctlsocket((SOCKET)file, FIONBIO, &one); + /* XXX should map error codes on failures */ + return (rv == 0); +} + +static int missing_completions = 0; +static int max_wait_loops = 0; + +static PRInt32 +_NT_IO_ABORT(PROsfd sock) +{ + PRThread *me = _PR_MD_CURRENT_THREAD(); + PRBool fWait; + PRInt32 rv; + int loop_count; + + /* This is a clumsy way to abort the IO, but it is all we can do. + * It looks a bit racy, but we handle all the cases. + * case 1: IO completes before calling closesocket + * case 1a: fWait is set to PR_FALSE + * This should e the most likely case. We'll properly + * not wait call _NT_IO_WAIT, since the closesocket() + * won't be forcing a completion. + * case 1b: fWait is set to PR_TRUE + * This hopefully won't happen much. When it does, this + * thread will timeout in _NT_IO_WAIT for CLOSE_INTERVAL + * before cleaning up. + * case 2: IO does not complete before calling closesocket + * case 2a: IO never completes + * This is the likely case. We'll close it and wait + * for the completion forced by the close. Return should + * be immediate. + * case 2b: IO completes just after calling closesocket + * Since the closesocket is issued, we'll either get a + * completion back for the real IO or for the close. We + * don't really care. It may not even be possible to get + * a real completion here. In any event, we'll awaken + * from NT_IO_WAIT immediately. + */ + + _PR_THREAD_LOCK(me); + fWait = me->io_pending; + if (fWait) { + /* + * If there's still I/O pending, it should have already timed + * out once before this function is called. + */ + PR_ASSERT(me->io_suspended == PR_TRUE); + + /* Set up to wait for I/O completion again */ + me->state = _PR_IO_WAIT; + me->io_suspended = PR_FALSE; + me->md.interrupt_disabled = PR_TRUE; + } + _PR_THREAD_UNLOCK(me); + + /* Close the socket if there is one */ + if (sock != INVALID_SOCKET) { + rv = closesocket((SOCKET)sock); + } + + /* If there was I/O pending before the close, wait for it to complete */ + if (fWait) { + + /* Wait and wait for the I/O to complete */ + for (loop_count = 0; fWait; ++loop_count) { + + _NT_IO_WAIT(me, CLOSE_TIMEOUT); + + _PR_THREAD_LOCK(me); + fWait = me->io_pending; + if (fWait) { + PR_ASSERT(me->io_suspended == PR_TRUE); + me->state = _PR_IO_WAIT; + me->io_suspended = PR_FALSE; + } + _PR_THREAD_UNLOCK(me); + + if (loop_count > max_wait_loops) { + max_wait_loops = loop_count; + } + } + + if (loop_count > 1) { + ++missing_completions; + } + + me->md.interrupt_disabled = PR_FALSE; + me->io_pending = PR_FALSE; + me->state = _PR_RUNNING; + } + + PR_ASSERT(me->io_pending == PR_FALSE); + me->md.thr_bound_cpu = NULL; + me->io_suspended = PR_FALSE; + + return rv; +} + + +PROsfd +_PR_MD_SOCKET(int af, int type, int flags) +{ + SOCKET sock; + + sock = socket(af, type, flags); + + if (sock == INVALID_SOCKET) { + _PR_MD_MAP_SOCKET_ERROR(WSAGetLastError()); + } + + return (PROsfd)sock; +} + +struct connect_data_s { + PRInt32 status; + PRInt32 error; + PROsfd osfd; + struct sockaddr *addr; + PRUint32 addrlen; + PRIntervalTime timeout; +}; + +void +_PR_MD_connect_thread(void *cdata) +{ + struct connect_data_s *cd = (struct connect_data_s *)cdata; + + cd->status = connect(cd->osfd, cd->addr, cd->addrlen); + + if (cd->status == SOCKET_ERROR) { + cd->error = WSAGetLastError(); + } + + return; +} + + +PRInt32 +_PR_MD_CONNECT(PRFileDesc *fd, const PRNetAddr *addr, PRUint32 addrlen, + PRIntervalTime timeout) +{ + PROsfd osfd = fd->secret->md.osfd; + PRInt32 rv, err; + u_long nbio; + PRInt32 rc; + + if (fd->secret->nonblocking) { + if (!fd->secret->md.io_model_committed) { + rv = _md_MakeNonblock((HANDLE)osfd); + PR_ASSERT(0 != rv); + fd->secret->md.io_model_committed = PR_TRUE; + } + + if ((rv = connect(osfd, (struct sockaddr *) addr, addrlen)) == -1) { + err = WSAGetLastError(); + _PR_MD_MAP_CONNECT_ERROR(err); + } + return rv; + } + + /* + * Temporarily make the socket non-blocking so that we can + * initiate a non-blocking connect and wait for its completion + * (with a timeout) in select. + */ + PR_ASSERT(!fd->secret->md.io_model_committed); + nbio = 1; + rv = ioctlsocket((SOCKET)osfd, FIONBIO, &nbio); + PR_ASSERT(0 == rv); + + rc = _nt_nonblock_connect(fd, (struct sockaddr *) addr, addrlen, timeout); + + /* Set the socket back to blocking. */ + nbio = 0; + rv = ioctlsocket((SOCKET)osfd, FIONBIO, &nbio); + PR_ASSERT(0 == rv); + + return rc; +} + +PRInt32 +_PR_MD_BIND(PRFileDesc *fd, const PRNetAddr *addr, PRUint32 addrlen) +{ + PRInt32 rv; +#if 0 + int one = 1; +#endif + + rv = bind(fd->secret->md.osfd, (const struct sockaddr *)&(addr->inet), addrlen); + + if (rv == SOCKET_ERROR) { + _PR_MD_MAP_BIND_ERROR(WSAGetLastError()); + return -1; + } + +#if 0 + /* Disable nagle- so far unknown if this is good or not... + */ + rv = setsockopt(fd->secret->md.osfd, + SOL_SOCKET, + TCP_NODELAY, + (const char *)&one, + sizeof(one)); + PR_ASSERT(rv == 0); +#endif + + return 0; +} + +void _PR_MD_UPDATE_ACCEPT_CONTEXT(PROsfd accept_sock, PROsfd listen_sock) +{ + /* Sockets accept()'d with AcceptEx need to call this setsockopt before + * calling anything other than ReadFile(), WriteFile(), send(), recv(), + * Transmitfile(), and closesocket(). In order to call any other + * winsock functions, we have to make this setsockopt call. + * + * XXXMB - For the server, we *NEVER* need this in + * the "normal" code path. But now we have to call it. This is a waste + * of a system call. We'd like to only call it before calling the + * obscure socket calls, but since we don't know at that point what the + * original socket was (or even if it is still alive) we can't do it + * at that point... + */ + setsockopt((SOCKET)accept_sock, + SOL_SOCKET, + SO_UPDATE_ACCEPT_CONTEXT, + (char *)&listen_sock, + sizeof(listen_sock)); + +} + +#define INET_ADDR_PADDED (sizeof(PRNetAddr) + 16) +PROsfd +_PR_MD_FAST_ACCEPT(PRFileDesc *fd, PRNetAddr *raddr, PRUint32 *rlen, + PRIntervalTime timeout, PRBool fast, + _PR_AcceptTimeoutCallback callback, void *callbackArg) +{ + PROsfd osfd = fd->secret->md.osfd; + PRThread *me = _PR_MD_CURRENT_THREAD(); + SOCKET accept_sock; + int bytes; + PRNetAddr *Laddr; + PRNetAddr *Raddr; + PRUint32 llen, err; + int rv; + + if (_NT_USE_NB_IO(fd)) { + if (!fd->secret->md.io_model_committed) { + rv = _md_MakeNonblock((HANDLE)osfd); + PR_ASSERT(0 != rv); + fd->secret->md.io_model_committed = PR_TRUE; + } + /* + * The accepted socket inherits the nonblocking and + * inheritable (HANDLE_FLAG_INHERIT) attributes of + * the listening socket. + */ + accept_sock = _nt_nonblock_accept(fd, (struct sockaddr *)raddr, rlen, timeout); + if (!fd->secret->nonblocking) { + u_long zero = 0; + + rv = ioctlsocket(accept_sock, FIONBIO, &zero); + PR_ASSERT(0 == rv); + } + return accept_sock; + } + + if (me->io_suspended) { + PR_SetError(PR_INVALID_STATE_ERROR, 0); + return -1; + } + + if (!fd->secret->md.io_model_committed) { + rv = _md_Associate((HANDLE)osfd); + PR_ASSERT(0 != rv); + fd->secret->md.io_model_committed = PR_TRUE; + } + + if (!me->md.acceptex_buf) { + me->md.acceptex_buf = PR_MALLOC(2*INET_ADDR_PADDED); + if (!me->md.acceptex_buf) { + PR_SetError(PR_OUT_OF_MEMORY_ERROR, 0); + return -1; + } + } + + accept_sock = _md_get_recycled_socket(fd->secret->af); + if (accept_sock == INVALID_SOCKET) { + return -1; + } + + memset(&(me->md.overlapped.overlapped), 0, sizeof(OVERLAPPED)); + if (_native_threads_only) { + me->md.overlapped.overlapped.hEvent = me->md.thr_event; + } + + _PR_THREAD_LOCK(me); + if (_PR_PENDING_INTERRUPT(me)) { + me->flags &= ~_PR_INTERRUPT; + PR_SetError(PR_PENDING_INTERRUPT_ERROR, 0); + _PR_THREAD_UNLOCK(me); + closesocket(accept_sock); + return -1; + } + me->io_pending = PR_TRUE; + me->state = _PR_IO_WAIT; + _PR_THREAD_UNLOCK(me); + me->io_fd = osfd; + + rv = AcceptEx((SOCKET)osfd, + accept_sock, + me->md.acceptex_buf, + 0, + INET_ADDR_PADDED, + INET_ADDR_PADDED, + &bytes, + &(me->md.overlapped.overlapped)); + + if ( (rv == 0) && ((err = WSAGetLastError()) != ERROR_IO_PENDING)) { + /* Argh! The IO failed */ + closesocket(accept_sock); + _PR_THREAD_LOCK(me); + me->io_pending = PR_FALSE; + me->state = _PR_RUNNING; + if (_PR_PENDING_INTERRUPT(me)) { + me->flags &= ~_PR_INTERRUPT; + PR_SetError(PR_PENDING_INTERRUPT_ERROR, 0); + _PR_THREAD_UNLOCK(me); + return -1; + } + _PR_THREAD_UNLOCK(me); + + _PR_MD_MAP_ACCEPTEX_ERROR(err); + return -1; + } + + if (_native_threads_only && rv) { + _native_thread_io_nowait(me, rv, bytes); + } else if (_NT_IO_WAIT(me, timeout) == PR_FAILURE) { + PR_ASSERT(0); + closesocket(accept_sock); + return -1; + } + + PR_ASSERT(me->io_pending == PR_FALSE || me->io_suspended == PR_TRUE); + + if (me->io_suspended) { + closesocket(accept_sock); + if (_PR_PENDING_INTERRUPT(me)) { + me->flags &= ~_PR_INTERRUPT; + PR_SetError(PR_PENDING_INTERRUPT_ERROR, 0); + } else { + PR_SetError(PR_IO_TIMEOUT_ERROR, 0); + } + return -1; + } + + if (me->md.blocked_io_status == 0) { + closesocket(accept_sock); + _PR_MD_MAP_ACCEPTEX_ERROR(me->md.blocked_io_error); + return -1; + } + + if (!fast) { + _PR_MD_UPDATE_ACCEPT_CONTEXT((SOCKET)accept_sock, (SOCKET)osfd); + } + + /* IO is done */ + GetAcceptExSockaddrs( + me->md.acceptex_buf, + 0, + INET_ADDR_PADDED, + INET_ADDR_PADDED, + (LPSOCKADDR *)&(Laddr), + &llen, + (LPSOCKADDR *)&(Raddr), + (unsigned int *)rlen); + + if (raddr != NULL) { + memcpy((char *)raddr, (char *)&Raddr->inet, *rlen); + } + + PR_ASSERT(me->io_pending == PR_FALSE); + + return accept_sock; +} + +PRInt32 +_PR_MD_FAST_ACCEPT_READ(PRFileDesc *sd, PROsfd *newSock, PRNetAddr **raddr, + void *buf, PRInt32 amount, PRIntervalTime timeout, + PRBool fast, _PR_AcceptTimeoutCallback callback, + void *callbackArg) +{ + PROsfd sock = sd->secret->md.osfd; + PRThread *me = _PR_MD_CURRENT_THREAD(); + int bytes; + PRNetAddr *Laddr; + PRUint32 llen, rlen, err; + int rv; + PRBool isConnected; + PRBool madeCallback = PR_FALSE; + + if (me->io_suspended) { + PR_SetError(PR_INVALID_STATE_ERROR, 0); + return -1; + } + + if (!sd->secret->md.io_model_committed) { + rv = _md_Associate((HANDLE)sock); + PR_ASSERT(0 != rv); + sd->secret->md.io_model_committed = PR_TRUE; + } + + *newSock = _md_get_recycled_socket(sd->secret->af); + if (*newSock == INVALID_SOCKET) { + return -1; + } + + memset(&(me->md.overlapped.overlapped), 0, sizeof(OVERLAPPED)); + if (_native_threads_only) { + me->md.overlapped.overlapped.hEvent = me->md.thr_event; + } + + _PR_THREAD_LOCK(me); + if (_PR_PENDING_INTERRUPT(me)) { + me->flags &= ~_PR_INTERRUPT; + PR_SetError(PR_PENDING_INTERRUPT_ERROR, 0); + _PR_THREAD_UNLOCK(me); + closesocket(*newSock); + return -1; + } + me->io_pending = PR_TRUE; + me->state = _PR_IO_WAIT; + _PR_THREAD_UNLOCK(me); + me->io_fd = sock; + + rv = AcceptEx((SOCKET)sock, + *newSock, + buf, + amount, + INET_ADDR_PADDED, + INET_ADDR_PADDED, + &bytes, + &(me->md.overlapped.overlapped)); + + if ( (rv == 0) && ((err = GetLastError()) != ERROR_IO_PENDING)) { + closesocket(*newSock); + _PR_THREAD_LOCK(me); + me->io_pending = PR_FALSE; + me->state = _PR_RUNNING; + if (_PR_PENDING_INTERRUPT(me)) { + me->flags &= ~_PR_INTERRUPT; + PR_SetError(PR_PENDING_INTERRUPT_ERROR, 0); + _PR_THREAD_UNLOCK(me); + return -1; + } + _PR_THREAD_UNLOCK(me); + + _PR_MD_MAP_ACCEPTEX_ERROR(err); + return -1; + } + + if (_native_threads_only && rv) { + _native_thread_io_nowait(me, rv, bytes); + } else if (_NT_IO_WAIT(me, timeout) == PR_FAILURE) { + PR_ASSERT(0); + closesocket(*newSock); + return -1; + } + +retry: + if (me->io_suspended) { + PRInt32 err; + INT seconds; + INT bytes = sizeof(seconds); + + PR_ASSERT(timeout != PR_INTERVAL_NO_TIMEOUT); + + err = getsockopt(*newSock, + SOL_SOCKET, + SO_CONNECT_TIME, + (char *)&seconds, + (PINT)&bytes); + if ( err == NO_ERROR ) { + PRIntervalTime elapsed = PR_SecondsToInterval(seconds); + + if (seconds == 0xffffffff) { + isConnected = PR_FALSE; + } + else { + isConnected = PR_TRUE; + } + + if (!isConnected) { + if (madeCallback == PR_FALSE && callback) { + callback(callbackArg); + } + madeCallback = PR_TRUE; + me->state = _PR_IO_WAIT; + if (_NT_ResumeIO(me, timeout) == PR_FAILURE) { + closesocket(*newSock); + return -1; + } + goto retry; + } + + if (elapsed < timeout) { + /* Socket is connected but time not elapsed, RESUME IO */ + timeout -= elapsed; + me->state = _PR_IO_WAIT; + if (_NT_ResumeIO(me, timeout) == PR_FAILURE) { + closesocket(*newSock); + return -1; + } + goto retry; + } + } else { + /* What to do here? Assume socket not open?*/ + PR_ASSERT(0); + isConnected = PR_FALSE; + } + + rv = _NT_IO_ABORT(*newSock); + + PR_ASSERT(me->io_pending == PR_FALSE); + PR_ASSERT(me->io_suspended == PR_FALSE); + PR_ASSERT(me->md.thr_bound_cpu == NULL); + /* If the IO is still suspended, it means we didn't get any + * completion from NT_IO_WAIT. This is not disasterous, I hope, + * but it may mean we still have an IO outstanding... Try to + * recover by just allowing ourselves to continue. + */ + me->io_suspended = PR_FALSE; + if (_PR_PENDING_INTERRUPT(me)) { + me->flags &= ~_PR_INTERRUPT; + PR_SetError(PR_PENDING_INTERRUPT_ERROR, 0); + } else { + PR_SetError(PR_IO_TIMEOUT_ERROR, 0); + } + me->state = _PR_RUNNING; + closesocket(*newSock); + return -1; + } + + PR_ASSERT(me->io_pending == PR_FALSE); + PR_ASSERT(me->io_suspended == PR_FALSE); + PR_ASSERT(me->md.thr_bound_cpu == NULL); + + if (me->md.blocked_io_status == 0) { + _PR_MD_MAP_ACCEPTEX_ERROR(me->md.blocked_io_error); + closesocket(*newSock); + return -1; + } + + if (!fast) { + _PR_MD_UPDATE_ACCEPT_CONTEXT((SOCKET)*newSock, (SOCKET)sock); + } + + /* IO is done */ + GetAcceptExSockaddrs( + buf, + amount, + INET_ADDR_PADDED, + INET_ADDR_PADDED, + (LPSOCKADDR *)&(Laddr), + &llen, + (LPSOCKADDR *)(raddr), + (unsigned int *)&rlen); + + return me->md.blocked_io_bytes; +} + +PRInt32 +_PR_MD_SENDFILE(PRFileDesc *sock, PRSendFileData *sfd, + PRInt32 flags, PRIntervalTime timeout) +{ + PRThread *me = _PR_MD_CURRENT_THREAD(); + PRInt32 tflags; + int rv, err; + + if (me->io_suspended) { + PR_SetError(PR_INVALID_STATE_ERROR, 0); + return -1; + } + + if (!sock->secret->md.io_model_committed) { + rv = _md_Associate((HANDLE)sock->secret->md.osfd); + PR_ASSERT(0 != rv); + sock->secret->md.io_model_committed = PR_TRUE; + } + if (!me->md.xmit_bufs) { + me->md.xmit_bufs = PR_NEW(TRANSMIT_FILE_BUFFERS); + if (!me->md.xmit_bufs) { + PR_SetError(PR_OUT_OF_MEMORY_ERROR, 0); + return -1; + } + } + me->md.xmit_bufs->Head = (void *)sfd->header; + me->md.xmit_bufs->HeadLength = sfd->hlen; + me->md.xmit_bufs->Tail = (void *)sfd->trailer; + me->md.xmit_bufs->TailLength = sfd->tlen; + + memset(&(me->md.overlapped.overlapped), 0, sizeof(OVERLAPPED)); + me->md.overlapped.overlapped.Offset = sfd->file_offset; + if (_native_threads_only) { + me->md.overlapped.overlapped.hEvent = me->md.thr_event; + } + + tflags = 0; + if (flags & PR_TRANSMITFILE_CLOSE_SOCKET) { + tflags = TF_DISCONNECT | TF_REUSE_SOCKET; + } + + _PR_THREAD_LOCK(me); + if (_PR_PENDING_INTERRUPT(me)) { + me->flags &= ~_PR_INTERRUPT; + PR_SetError(PR_PENDING_INTERRUPT_ERROR, 0); + _PR_THREAD_UNLOCK(me); + return -1; + } + me->io_pending = PR_TRUE; + me->state = _PR_IO_WAIT; + _PR_THREAD_UNLOCK(me); + me->io_fd = sock->secret->md.osfd; + + rv = TransmitFile((SOCKET)sock->secret->md.osfd, + (HANDLE)sfd->fd->secret->md.osfd, + (DWORD)sfd->file_nbytes, + (DWORD)0, + (LPOVERLAPPED)&(me->md.overlapped.overlapped), + (TRANSMIT_FILE_BUFFERS *)me->md.xmit_bufs, + (DWORD)tflags); + if ( (rv == 0) && ((err = GetLastError()) != ERROR_IO_PENDING) ) { + _PR_THREAD_LOCK(me); + me->io_pending = PR_FALSE; + me->state = _PR_RUNNING; + if (_PR_PENDING_INTERRUPT(me)) { + me->flags &= ~_PR_INTERRUPT; + PR_SetError(PR_PENDING_INTERRUPT_ERROR, 0); + _PR_THREAD_UNLOCK(me); + return -1; + } + _PR_THREAD_UNLOCK(me); + + _PR_MD_MAP_TRANSMITFILE_ERROR(err); + return -1; + } + + if (_NT_IO_WAIT(me, timeout) == PR_FAILURE) { + PR_ASSERT(0); + return -1; + } + + PR_ASSERT(me->io_pending == PR_FALSE || me->io_suspended == PR_TRUE); + + if (me->io_suspended) { + if (_PR_PENDING_INTERRUPT(me)) { + me->flags &= ~_PR_INTERRUPT; + PR_SetError(PR_PENDING_INTERRUPT_ERROR, 0); + } else { + PR_SetError(PR_IO_TIMEOUT_ERROR, 0); + } + return -1; + } + + if (me->md.blocked_io_status == 0) { + _PR_MD_MAP_TRANSMITFILE_ERROR(me->md.blocked_io_error); + return -1; + } + + if (flags & PR_TRANSMITFILE_CLOSE_SOCKET) { + _md_put_recycled_socket(sock->secret->md.osfd, sock->secret->af); + } + + PR_ASSERT(me->io_pending == PR_FALSE); + + return me->md.blocked_io_bytes; +} + +PRInt32 +_PR_MD_RECV(PRFileDesc *fd, void *buf, PRInt32 amount, PRIntn flags, + PRIntervalTime timeout) +{ + PROsfd osfd = fd->secret->md.osfd; + PRThread *me = _PR_MD_CURRENT_THREAD(); + int bytes; + int rv, err; + + if (_NT_USE_NB_IO(fd)) { + if (!fd->secret->md.io_model_committed) { + rv = _md_MakeNonblock((HANDLE)osfd); + PR_ASSERT(0 != rv); + fd->secret->md.io_model_committed = PR_TRUE; + } + return _nt_nonblock_recv(fd, buf, amount, flags, timeout); + } + + if (me->io_suspended) { + PR_SetError(PR_INVALID_STATE_ERROR, 0); + return -1; + } + + if (!fd->secret->md.io_model_committed) { + rv = _md_Associate((HANDLE)osfd); + PR_ASSERT(0 != rv); + fd->secret->md.io_model_committed = PR_TRUE; + } + + memset(&(me->md.overlapped.overlapped), 0, sizeof(OVERLAPPED)); + if (_native_threads_only) { + me->md.overlapped.overlapped.hEvent = me->md.thr_event; + } + + _PR_THREAD_LOCK(me); + if (_PR_PENDING_INTERRUPT(me)) { + me->flags &= ~_PR_INTERRUPT; + PR_SetError(PR_PENDING_INTERRUPT_ERROR, 0); + _PR_THREAD_UNLOCK(me); + return -1; + } + me->io_pending = PR_TRUE; + me->state = _PR_IO_WAIT; + _PR_THREAD_UNLOCK(me); + me->io_fd = osfd; + + rv = ReadFile((HANDLE)osfd, + buf, + amount, + &bytes, + &(me->md.overlapped.overlapped)); + if ( (rv == 0) && (GetLastError() != ERROR_IO_PENDING) ) { + _PR_THREAD_LOCK(me); + me->io_pending = PR_FALSE; + me->state = _PR_RUNNING; + if (_PR_PENDING_INTERRUPT(me)) { + me->flags &= ~_PR_INTERRUPT; + PR_SetError(PR_PENDING_INTERRUPT_ERROR, 0); + _PR_THREAD_UNLOCK(me); + return -1; + } + _PR_THREAD_UNLOCK(me); + + if ((err = GetLastError()) == ERROR_HANDLE_EOF) { + return 0; + } + _PR_MD_MAP_READ_ERROR(err); + return -1; + } + + if (_native_threads_only && rv) { + _native_thread_io_nowait(me, rv, bytes); + } else if (_NT_IO_WAIT(me, timeout) == PR_FAILURE) { + PR_ASSERT(0); + return -1; + } + + PR_ASSERT(me->io_pending == PR_FALSE || me->io_suspended == PR_TRUE); + + if (me->io_suspended) { + if (_PR_PENDING_INTERRUPT(me)) { + me->flags &= ~_PR_INTERRUPT; + PR_SetError(PR_PENDING_INTERRUPT_ERROR, 0); + } else { + PR_SetError(PR_IO_TIMEOUT_ERROR, 0); + } + return -1; + } + + if (me->md.blocked_io_status == 0) { + if (me->md.blocked_io_error == ERROR_HANDLE_EOF) { + return 0; + } + _PR_MD_MAP_READ_ERROR(me->md.blocked_io_error); + return -1; + } + + PR_ASSERT(me->io_pending == PR_FALSE); + + return me->md.blocked_io_bytes; +} + +PRInt32 +_PR_MD_SEND(PRFileDesc *fd, const void *buf, PRInt32 amount, PRIntn flags, + PRIntervalTime timeout) +{ + PROsfd osfd = fd->secret->md.osfd; + PRThread *me = _PR_MD_CURRENT_THREAD(); + int bytes; + int rv, err; + + if (_NT_USE_NB_IO(fd)) { + if (!fd->secret->md.io_model_committed) { + rv = _md_MakeNonblock((HANDLE)osfd); + PR_ASSERT(0 != rv); + fd->secret->md.io_model_committed = PR_TRUE; + } + return _nt_nonblock_send(fd, (char *)buf, amount, timeout); + } + + if (me->io_suspended) { + PR_SetError(PR_INVALID_STATE_ERROR, 0); + return -1; + } + + if (!fd->secret->md.io_model_committed) { + rv = _md_Associate((HANDLE)osfd); + PR_ASSERT(0 != rv); + fd->secret->md.io_model_committed = PR_TRUE; + } + + memset(&(me->md.overlapped.overlapped), 0, sizeof(OVERLAPPED)); + if (_native_threads_only) { + me->md.overlapped.overlapped.hEvent = me->md.thr_event; + } + + _PR_THREAD_LOCK(me); + if (_PR_PENDING_INTERRUPT(me)) { + me->flags &= ~_PR_INTERRUPT; + PR_SetError(PR_PENDING_INTERRUPT_ERROR, 0); + _PR_THREAD_UNLOCK(me); + return -1; + } + me->io_pending = PR_TRUE; + me->state = _PR_IO_WAIT; + _PR_THREAD_UNLOCK(me); + me->io_fd = osfd; + + rv = WriteFile((HANDLE)osfd, + buf, + amount, + &bytes, + &(me->md.overlapped.overlapped)); + if ( (rv == 0) && ((err = GetLastError()) != ERROR_IO_PENDING) ) { + _PR_THREAD_LOCK(me); + me->io_pending = PR_FALSE; + me->state = _PR_RUNNING; + if (_PR_PENDING_INTERRUPT(me)) { + me->flags &= ~_PR_INTERRUPT; + PR_SetError(PR_PENDING_INTERRUPT_ERROR, 0); + _PR_THREAD_UNLOCK(me); + return -1; + } + _PR_THREAD_UNLOCK(me); + + _PR_MD_MAP_WRITE_ERROR(err); + return -1; + } + + if (_native_threads_only && rv) { + _native_thread_io_nowait(me, rv, bytes); + } else if (_NT_IO_WAIT(me, timeout) == PR_FAILURE) { + PR_ASSERT(0); + return -1; + } + + PR_ASSERT(me->io_pending == PR_FALSE || me->io_suspended == PR_TRUE); + + if (me->io_suspended) { + if (_PR_PENDING_INTERRUPT(me)) { + me->flags &= ~_PR_INTERRUPT; + PR_SetError(PR_PENDING_INTERRUPT_ERROR, 0); + } else { + PR_SetError(PR_IO_TIMEOUT_ERROR, 0); + } + return -1; + } + + if (me->md.blocked_io_status == 0) { + _PR_MD_MAP_WRITE_ERROR(me->md.blocked_io_error); + return -1; + } + + PR_ASSERT(me->io_pending == PR_FALSE); + + return me->md.blocked_io_bytes; +} + +PRInt32 +_PR_MD_SENDTO(PRFileDesc *fd, const void *buf, PRInt32 amount, PRIntn flags, + const PRNetAddr *addr, PRUint32 addrlen, PRIntervalTime timeout) +{ + PROsfd osfd = fd->secret->md.osfd; + PRInt32 rv; + + if (!fd->secret->md.io_model_committed) { + rv = _md_MakeNonblock((HANDLE)osfd); + PR_ASSERT(0 != rv); + fd->secret->md.io_model_committed = PR_TRUE; + } + if (_NT_USE_NB_IO(fd)) { + return _nt_nonblock_sendto(fd, buf, amount, (struct sockaddr *)addr, addrlen, timeout); + } + else { + return pt_SendTo(osfd, buf, amount, flags, addr, addrlen, timeout); + } +} + +PRInt32 +_PR_MD_RECVFROM(PRFileDesc *fd, void *buf, PRInt32 amount, PRIntn flags, + PRNetAddr *addr, PRUint32 *addrlen, PRIntervalTime timeout) +{ + PROsfd osfd = fd->secret->md.osfd; + PRInt32 rv; + + if (!fd->secret->md.io_model_committed) { + rv = _md_MakeNonblock((HANDLE)osfd); + PR_ASSERT(0 != rv); + fd->secret->md.io_model_committed = PR_TRUE; + } + if (_NT_USE_NB_IO(fd)) { + return _nt_nonblock_recvfrom(fd, buf, amount, (struct sockaddr *)addr, addrlen, timeout); + } + else { + return pt_RecvFrom(osfd, buf, amount, flags, addr, addrlen, timeout); + } +} + +/* XXXMB - for now this is a sockets call only */ +PRInt32 +_PR_MD_WRITEV(PRFileDesc *fd, const PRIOVec *iov, PRInt32 iov_size, PRIntervalTime timeout) +{ + PROsfd osfd = fd->secret->md.osfd; + int index; + int sent = 0; + int rv; + + if (_NT_USE_NB_IO(fd)) { + if (!fd->secret->md.io_model_committed) { + rv = _md_MakeNonblock((HANDLE)osfd); + PR_ASSERT(0 != rv); + fd->secret->md.io_model_committed = PR_TRUE; + } + return _nt_nonblock_writev(fd, iov, iov_size, timeout); + } + + for (index=0; index<iov_size; index++) { + rv = _PR_MD_SEND(fd, iov[index].iov_base, iov[index].iov_len, 0, + timeout); + if (rv > 0) { + sent += rv; + } + if ( rv != iov[index].iov_len ) { + if (sent <= 0) { + return -1; + } + return -1; + } + } + + return sent; +} + +PRInt32 +_PR_MD_LISTEN(PRFileDesc *fd, PRIntn backlog) +{ + PRInt32 rv; + + rv = listen(fd->secret->md.osfd, backlog); + if (rv < 0) { + _PR_MD_MAP_LISTEN_ERROR(WSAGetLastError()); + } + return(rv); +} + +PRInt32 +_PR_MD_SHUTDOWN(PRFileDesc *fd, PRIntn how) +{ + PRInt32 rv; + + rv = shutdown(fd->secret->md.osfd, how); + if (rv < 0) { + _PR_MD_MAP_SHUTDOWN_ERROR(WSAGetLastError()); + } + return(rv); +} + +PRStatus +_PR_MD_GETSOCKNAME(PRFileDesc *fd, PRNetAddr *addr, PRUint32 *len) +{ + PRInt32 rv; + + rv = getsockname((SOCKET)fd->secret->md.osfd, (struct sockaddr *)addr, len); + if (rv==0) { + return PR_SUCCESS; + } + else { + _PR_MD_MAP_GETSOCKNAME_ERROR(WSAGetLastError()); + return PR_FAILURE; + } +} + +PRStatus +_PR_MD_GETPEERNAME(PRFileDesc *fd, PRNetAddr *addr, PRUint32 *len) +{ + PRInt32 rv; + + /* + * NT has a bug that, when invoked on a socket accepted by + * AcceptEx(), getpeername() returns an all-zero peer address. + * To work around this bug, we store the peer's address (returned + * by AcceptEx()) with the socket fd and use the cached peer + * address if the socket is an accepted socket. + */ + + if (fd->secret->md.accepted_socket) { + INT seconds; + INT bytes = sizeof(seconds); + + /* + * Determine if the socket is connected. + */ + + rv = getsockopt(fd->secret->md.osfd, + SOL_SOCKET, + SO_CONNECT_TIME, + (char *) &seconds, + (PINT) &bytes); + if (rv == NO_ERROR) { + if (seconds == 0xffffffff) { + PR_SetError(PR_NOT_CONNECTED_ERROR, 0); + return PR_FAILURE; + } + *len = PR_NETADDR_SIZE(&fd->secret->md.peer_addr); + memcpy(addr, &fd->secret->md.peer_addr, *len); + return PR_SUCCESS; + } else { + _PR_MD_MAP_GETSOCKOPT_ERROR(WSAGetLastError()); + return PR_FAILURE; + } + } else { + rv = getpeername((SOCKET)fd->secret->md.osfd, + (struct sockaddr *) addr, len); + if (rv == 0) { + return PR_SUCCESS; + } else { + _PR_MD_MAP_GETPEERNAME_ERROR(WSAGetLastError()); + return PR_FAILURE; + } + } +} + +PRStatus +_PR_MD_GETSOCKOPT(PRFileDesc *fd, PRInt32 level, PRInt32 optname, char* optval, PRInt32* optlen) +{ + PRInt32 rv; + + rv = getsockopt((SOCKET)fd->secret->md.osfd, level, optname, optval, optlen); + if (rv==0) { + return PR_SUCCESS; + } + else { + _PR_MD_MAP_GETSOCKOPT_ERROR(WSAGetLastError()); + return PR_FAILURE; + } +} + +PRStatus +_PR_MD_SETSOCKOPT(PRFileDesc *fd, PRInt32 level, PRInt32 optname, const char* optval, PRInt32 optlen) +{ + PRInt32 rv; + + rv = setsockopt((SOCKET)fd->secret->md.osfd, level, optname, optval, optlen); + if (rv==0) { + return PR_SUCCESS; + } + else { + _PR_MD_MAP_SETSOCKOPT_ERROR(WSAGetLastError()); + return PR_FAILURE; + } +} + +/* --- FILE IO ----------------------------------------------------------- */ + +PROsfd +_PR_MD_OPEN(const char *name, PRIntn osflags, PRIntn mode) +{ + HANDLE file; + PRInt32 access = 0; + PRInt32 flags = 0; + PRInt32 flag6 = 0; + + if (osflags & PR_SYNC) { + flag6 = FILE_FLAG_WRITE_THROUGH; + } + + if (osflags & PR_RDONLY || osflags & PR_RDWR) { + access |= GENERIC_READ; + } + if (osflags & PR_WRONLY || osflags & PR_RDWR) { + access |= GENERIC_WRITE; + } + + if ( osflags & PR_CREATE_FILE && osflags & PR_EXCL ) { + flags = CREATE_NEW; + } + else if (osflags & PR_CREATE_FILE) { + flags = (0 != (osflags & PR_TRUNCATE)) ? CREATE_ALWAYS : OPEN_ALWAYS; + } + else if (osflags & PR_TRUNCATE) { + flags = TRUNCATE_EXISTING; + } + else { + flags = OPEN_EXISTING; + } + + + flag6 |= FILE_FLAG_OVERLAPPED; + + file = CreateFile(name, + access, + FILE_SHARE_READ|FILE_SHARE_WRITE, + NULL, + flags, + flag6, + NULL); + if (file == INVALID_HANDLE_VALUE) { + _PR_MD_MAP_OPEN_ERROR(GetLastError()); + return -1; + } + + if (osflags & PR_APPEND) { + if ( SetFilePointer(file, 0, 0, FILE_END) == 0xFFFFFFFF ) { + _PR_MD_MAP_LSEEK_ERROR(GetLastError()); + CloseHandle(file); + return -1; + } + } + + return (PROsfd)file; +} + +PROsfd +_PR_MD_OPEN_FILE(const char *name, PRIntn osflags, PRIntn mode) +{ + HANDLE file; + PRInt32 access = 0; + PRInt32 flags = 0; + PRInt32 flag6 = 0; + SECURITY_ATTRIBUTES sa; + LPSECURITY_ATTRIBUTES lpSA = NULL; + PSECURITY_DESCRIPTOR pSD = NULL; + PACL pACL = NULL; + + if (osflags & PR_SYNC) { + flag6 = FILE_FLAG_WRITE_THROUGH; + } + + if (osflags & PR_RDONLY || osflags & PR_RDWR) { + access |= GENERIC_READ; + } + if (osflags & PR_WRONLY || osflags & PR_RDWR) { + access |= GENERIC_WRITE; + } + + if ( osflags & PR_CREATE_FILE && osflags & PR_EXCL ) { + flags = CREATE_NEW; + } + else if (osflags & PR_CREATE_FILE) { + flags = (0 != (osflags & PR_TRUNCATE)) ? CREATE_ALWAYS : OPEN_ALWAYS; + } + else if (osflags & PR_TRUNCATE) { + flags = TRUNCATE_EXISTING; + } + else { + flags = OPEN_EXISTING; + } + + + flag6 |= FILE_FLAG_OVERLAPPED; + + if (osflags & PR_CREATE_FILE) { + if (_PR_NT_MakeSecurityDescriptorACL(mode, fileAccessTable, + &pSD, &pACL) == PR_SUCCESS) { + sa.nLength = sizeof(sa); + sa.lpSecurityDescriptor = pSD; + sa.bInheritHandle = FALSE; + lpSA = &sa; + } + } + file = CreateFile(name, + access, + FILE_SHARE_READ|FILE_SHARE_WRITE, + lpSA, + flags, + flag6, + NULL); + if (lpSA != NULL) { + _PR_NT_FreeSecurityDescriptorACL(pSD, pACL); + } + if (file == INVALID_HANDLE_VALUE) { + _PR_MD_MAP_OPEN_ERROR(GetLastError()); + return -1; + } + + if (osflags & PR_APPEND) { + if ( SetFilePointer(file, 0, 0, FILE_END) == 0xFFFFFFFF ) { + _PR_MD_MAP_LSEEK_ERROR(GetLastError()); + CloseHandle(file); + return -1; + } + } + + return (PROsfd)file; +} + +PRInt32 +_PR_MD_READ(PRFileDesc *fd, void *buf, PRInt32 len) +{ + PROsfd f = fd->secret->md.osfd; + PRUint32 bytes; + int rv, err; + LONG hiOffset = 0; + LONG loOffset; + LARGE_INTEGER offset; /* use for a normalized add of len to offset */ + + if (!fd->secret->md.sync_file_io) { + PRThread *me = _PR_MD_CURRENT_THREAD(); + + if (me->io_suspended) { + PR_SetError(PR_INVALID_STATE_ERROR, 0); + return -1; + } + + memset(&(me->md.overlapped.overlapped), 0, sizeof(OVERLAPPED)); + + me->md.overlapped.overlapped.Offset = SetFilePointer((HANDLE)f, 0, &me->md.overlapped.overlapped.OffsetHigh, FILE_CURRENT); + PR_ASSERT((me->md.overlapped.overlapped.Offset != 0xffffffff) || (GetLastError() == NO_ERROR)); + + if (fd->secret->inheritable == _PR_TRI_TRUE) { + rv = ReadFile((HANDLE)f, + (LPVOID)buf, + len, + &bytes, + &me->md.overlapped.overlapped); + if (rv != 0) { + loOffset = SetFilePointer((HANDLE)f, bytes, &hiOffset, FILE_CURRENT); + PR_ASSERT((loOffset != 0xffffffff) || (GetLastError() == NO_ERROR)); + return bytes; + } + err = GetLastError(); + if (err == ERROR_IO_PENDING) { + rv = GetOverlappedResult((HANDLE)f, + &me->md.overlapped.overlapped, &bytes, TRUE); + if (rv != 0) { + loOffset = SetFilePointer((HANDLE)f, bytes, &hiOffset, FILE_CURRENT); + PR_ASSERT((loOffset != 0xffffffff) || (GetLastError() == NO_ERROR)); + return bytes; + } + err = GetLastError(); + } + if (err == ERROR_HANDLE_EOF) { + return 0; + } else { + _PR_MD_MAP_READ_ERROR(err); + return -1; + } + } else { + if (!fd->secret->md.io_model_committed) { + rv = _md_Associate((HANDLE)f); + PR_ASSERT(rv != 0); + fd->secret->md.io_model_committed = PR_TRUE; + } + + if (_native_threads_only) { + me->md.overlapped.overlapped.hEvent = me->md.thr_event; + } + + _PR_THREAD_LOCK(me); + if (_PR_PENDING_INTERRUPT(me)) { + me->flags &= ~_PR_INTERRUPT; + PR_SetError(PR_PENDING_INTERRUPT_ERROR, 0); + _PR_THREAD_UNLOCK(me); + return -1; + } + me->io_pending = PR_TRUE; + me->state = _PR_IO_WAIT; + _PR_THREAD_UNLOCK(me); + me->io_fd = f; + + rv = ReadFile((HANDLE)f, + (LPVOID)buf, + len, + &bytes, + &me->md.overlapped.overlapped); + if ( (rv == 0) && ((err = GetLastError()) != ERROR_IO_PENDING) ) { + _PR_THREAD_LOCK(me); + me->io_pending = PR_FALSE; + me->state = _PR_RUNNING; + if (_PR_PENDING_INTERRUPT(me)) { + me->flags &= ~_PR_INTERRUPT; + PR_SetError(PR_PENDING_INTERRUPT_ERROR, 0); + _PR_THREAD_UNLOCK(me); + return -1; + } + _PR_THREAD_UNLOCK(me); + + if (err == ERROR_HANDLE_EOF) { + return 0; + } + _PR_MD_MAP_READ_ERROR(err); + return -1; + } + + if (_native_threads_only && rv) { + _native_thread_io_nowait(me, rv, bytes); + } else if (_NT_IO_WAIT(me, PR_INTERVAL_NO_TIMEOUT) == PR_FAILURE) { + PR_ASSERT(0); + return -1; + } + + PR_ASSERT(me->io_pending == PR_FALSE || me->io_suspended == PR_TRUE); + + if (me->io_suspended) { + if (_PR_PENDING_INTERRUPT(me)) { + me->flags &= ~_PR_INTERRUPT; + PR_SetError(PR_PENDING_INTERRUPT_ERROR, 0); + } else { + PR_SetError(PR_IO_TIMEOUT_ERROR, 0); + } + return -1; + } + + if (me->md.blocked_io_status == 0) { + if (me->md.blocked_io_error == ERROR_HANDLE_EOF) { + return 0; + } + _PR_MD_MAP_READ_ERROR(me->md.blocked_io_error); + return -1; + } + + /* Apply the workaround from bug 70765 (see _PR_MD_WRITE) + * to the reading code, too. */ + + offset.LowPart = me->md.overlapped.overlapped.Offset; + offset.HighPart = me->md.overlapped.overlapped.OffsetHigh; + offset.QuadPart += me->md.blocked_io_bytes; + + SetFilePointer((HANDLE)f, offset.LowPart, &offset.HighPart, FILE_BEGIN); + + PR_ASSERT(me->io_pending == PR_FALSE); + + return me->md.blocked_io_bytes; + } + } else { + + rv = ReadFile((HANDLE)f, + (LPVOID)buf, + len, + &bytes, + NULL); + if (rv == 0) { + err = GetLastError(); + /* ERROR_HANDLE_EOF can only be returned by async io */ + PR_ASSERT(err != ERROR_HANDLE_EOF); + if (err == ERROR_BROKEN_PIPE) { + /* The write end of the pipe has been closed. */ + return 0; + } + _PR_MD_MAP_READ_ERROR(err); + return -1; + } + return bytes; + } +} + +PRInt32 +_PR_MD_WRITE(PRFileDesc *fd, const void *buf, PRInt32 len) +{ + PROsfd f = fd->secret->md.osfd; + PRInt32 bytes; + int rv, err; + LONG hiOffset = 0; + LONG loOffset; + LARGE_INTEGER offset; /* use for the calculation of the new offset */ + + if (!fd->secret->md.sync_file_io) { + PRThread *me = _PR_MD_CURRENT_THREAD(); + + if (me->io_suspended) { + PR_SetError(PR_INVALID_STATE_ERROR, 0); + return -1; + } + + memset(&(me->md.overlapped.overlapped), 0, sizeof(OVERLAPPED)); + + me->md.overlapped.overlapped.Offset = SetFilePointer((HANDLE)f, 0, &me->md.overlapped.overlapped.OffsetHigh, FILE_CURRENT); + PR_ASSERT((me->md.overlapped.overlapped.Offset != 0xffffffff) || (GetLastError() == NO_ERROR)); + + if (fd->secret->inheritable == _PR_TRI_TRUE) { + rv = WriteFile((HANDLE)f, + (LPVOID)buf, + len, + &bytes, + &me->md.overlapped.overlapped); + if (rv != 0) { + loOffset = SetFilePointer((HANDLE)f, bytes, &hiOffset, FILE_CURRENT); + PR_ASSERT((loOffset != 0xffffffff) || (GetLastError() == NO_ERROR)); + return bytes; + } + err = GetLastError(); + if (err == ERROR_IO_PENDING) { + rv = GetOverlappedResult((HANDLE)f, + &me->md.overlapped.overlapped, &bytes, TRUE); + if (rv != 0) { + loOffset = SetFilePointer((HANDLE)f, bytes, &hiOffset, FILE_CURRENT); + PR_ASSERT((loOffset != 0xffffffff) || (GetLastError() == NO_ERROR)); + return bytes; + } + err = GetLastError(); + } + _PR_MD_MAP_READ_ERROR(err); + return -1; + } else { + if (!fd->secret->md.io_model_committed) { + rv = _md_Associate((HANDLE)f); + PR_ASSERT(rv != 0); + fd->secret->md.io_model_committed = PR_TRUE; + } + if (_native_threads_only) { + me->md.overlapped.overlapped.hEvent = me->md.thr_event; + } + + _PR_THREAD_LOCK(me); + if (_PR_PENDING_INTERRUPT(me)) { + me->flags &= ~_PR_INTERRUPT; + PR_SetError(PR_PENDING_INTERRUPT_ERROR, 0); + _PR_THREAD_UNLOCK(me); + return -1; + } + me->io_pending = PR_TRUE; + me->state = _PR_IO_WAIT; + _PR_THREAD_UNLOCK(me); + me->io_fd = f; + + rv = WriteFile((HANDLE)f, + buf, + len, + &bytes, + &(me->md.overlapped.overlapped)); + if ( (rv == 0) && ((err = GetLastError()) != ERROR_IO_PENDING) ) { + _PR_THREAD_LOCK(me); + me->io_pending = PR_FALSE; + me->state = _PR_RUNNING; + if (_PR_PENDING_INTERRUPT(me)) { + me->flags &= ~_PR_INTERRUPT; + PR_SetError(PR_PENDING_INTERRUPT_ERROR, 0); + _PR_THREAD_UNLOCK(me); + return -1; + } + _PR_THREAD_UNLOCK(me); + + _PR_MD_MAP_WRITE_ERROR(err); + return -1; + } + + if (_native_threads_only && rv) { + _native_thread_io_nowait(me, rv, bytes); + } else if (_NT_IO_WAIT(me, PR_INTERVAL_NO_TIMEOUT) == PR_FAILURE) { + PR_ASSERT(0); + return -1; + } + + PR_ASSERT(me->io_pending == PR_FALSE || me->io_suspended == PR_TRUE); + + if (me->io_suspended) { + if (_PR_PENDING_INTERRUPT(me)) { + me->flags &= ~_PR_INTERRUPT; + PR_SetError(PR_PENDING_INTERRUPT_ERROR, 0); + } else { + PR_SetError(PR_IO_TIMEOUT_ERROR, 0); + } + return -1; + } + + if (me->md.blocked_io_status == 0) { + _PR_MD_MAP_WRITE_ERROR(me->md.blocked_io_error); + return -1; + } + + /* + * Moving the file pointer by a relative offset (FILE_CURRENT) + * does not work with a file on a network drive exported by a + * Win2K system. We still don't know why. A workaround is to + * move the file pointer by an absolute offset (FILE_BEGIN). + * (Bugzilla bug 70765) + */ + offset.LowPart = me->md.overlapped.overlapped.Offset; + offset.HighPart = me->md.overlapped.overlapped.OffsetHigh; + offset.QuadPart += me->md.blocked_io_bytes; + + SetFilePointer((HANDLE)f, offset.LowPart, &offset.HighPart, FILE_BEGIN); + + PR_ASSERT(me->io_pending == PR_FALSE); + + return me->md.blocked_io_bytes; + } + } else { + rv = WriteFile((HANDLE)f, + buf, + len, + &bytes, + NULL); + if (rv == 0) { + _PR_MD_MAP_WRITE_ERROR(GetLastError()); + return -1; + } + return bytes; + } +} + +PRInt32 +_PR_MD_SOCKETAVAILABLE(PRFileDesc *fd) +{ + PRInt32 result; + + if (ioctlsocket(fd->secret->md.osfd, FIONREAD, &result) < 0) { + PR_SetError(PR_BAD_DESCRIPTOR_ERROR, WSAGetLastError()); + return -1; + } + return result; +} + +PRInt32 +_PR_MD_PIPEAVAILABLE(PRFileDesc *fd) +{ + if (NULL == fd) { + PR_SetError(PR_BAD_DESCRIPTOR_ERROR, 0); + } + else { + PR_SetError(PR_NOT_IMPLEMENTED_ERROR, 0); + } + return -1; +} + +PROffset32 +_PR_MD_LSEEK(PRFileDesc *fd, PROffset32 offset, PRSeekWhence whence) +{ + DWORD moveMethod; + PROffset32 rv; + + switch (whence) { + case PR_SEEK_SET: + moveMethod = FILE_BEGIN; + break; + case PR_SEEK_CUR: + moveMethod = FILE_CURRENT; + break; + case PR_SEEK_END: + moveMethod = FILE_END; + break; + default: + PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0); + return -1; + } + + rv = SetFilePointer((HANDLE)fd->secret->md.osfd, offset, NULL, moveMethod); + + /* + * If the lpDistanceToMoveHigh argument (third argument) is + * NULL, SetFilePointer returns 0xffffffff on failure. + */ + if (-1 == rv) { + _PR_MD_MAP_LSEEK_ERROR(GetLastError()); + } + return rv; +} + +PROffset64 +_PR_MD_LSEEK64(PRFileDesc *fd, PROffset64 offset, PRSeekWhence whence) +{ + DWORD moveMethod; + LARGE_INTEGER li; + DWORD err; + + switch (whence) { + case PR_SEEK_SET: + moveMethod = FILE_BEGIN; + break; + case PR_SEEK_CUR: + moveMethod = FILE_CURRENT; + break; + case PR_SEEK_END: + moveMethod = FILE_END; + break; + default: + PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0); + return -1; + } + + li.QuadPart = offset; + li.LowPart = SetFilePointer((HANDLE)fd->secret->md.osfd, + li.LowPart, &li.HighPart, moveMethod); + + if (0xffffffff == li.LowPart && (err = GetLastError()) != NO_ERROR) { + _PR_MD_MAP_LSEEK_ERROR(err); + li.QuadPart = -1; + } + return li.QuadPart; +} + +/* + * This is documented to succeed on read-only files, but Win32's + * FlushFileBuffers functions fails with "access denied" in such a + * case. So we only signal an error if the error is *not* "access + * denied". + */ +PRInt32 +_PR_MD_FSYNC(PRFileDesc *fd) +{ + /* + * From the documentation: + * + * On Windows NT, the function FlushFileBuffers fails if hFile + * is a handle to console output. That is because console + * output is not buffered. The function returns FALSE, and + * GetLastError returns ERROR_INVALID_HANDLE. + * + * On the other hand, on Win95, it returns without error. I cannot + * assume that 0, 1, and 2 are console, because if someone closes + * System.out and then opens a file, they might get file descriptor + * 1. An error on *that* version of 1 should be reported, whereas + * an error on System.out (which was the original 1) should be + * ignored. So I use isatty() to ensure that such an error was + * because of this, and if it was, I ignore the error. + */ + + BOOL ok = FlushFileBuffers((HANDLE)fd->secret->md.osfd); + + if (!ok) { + DWORD err = GetLastError(); + + if (err != ERROR_ACCESS_DENIED) { /* from winerror.h */ + _PR_MD_MAP_FSYNC_ERROR(err); + return -1; + } + } + return 0; +} + +PRInt32 +_PR_MD_CLOSE(PROsfd osfd, PRBool socket) +{ + PRInt32 rv; + PRThread *me = _PR_MD_CURRENT_THREAD(); + + if (socket) { + rv = closesocket((SOCKET)osfd); + if (rv < 0) { + _PR_MD_MAP_CLOSE_ERROR(WSAGetLastError()); + } + } else { + rv = CloseHandle((HANDLE)osfd)?0:-1; + if (rv < 0) { + _PR_MD_MAP_CLOSE_ERROR(GetLastError()); + } + } + + if (rv == 0 && me->io_suspended) { + if (me->io_fd == osfd) { + PRBool fWait; + + _PR_THREAD_LOCK(me); + me->state = _PR_IO_WAIT; + /* The IO could have completed on another thread just after + * calling closesocket while the io_suspended flag was true. + * So we now grab the lock to do a safe check on io_pending to + * see if we need to wait or not. + */ + fWait = me->io_pending; + me->io_suspended = PR_FALSE; + me->md.interrupt_disabled = PR_TRUE; + _PR_THREAD_UNLOCK(me); + + if (fWait) { + _NT_IO_WAIT(me, PR_INTERVAL_NO_TIMEOUT); + } + PR_ASSERT(me->io_suspended == PR_FALSE); + PR_ASSERT(me->io_pending == PR_FALSE); + /* + * I/O operation is no longer pending; the thread can now + * run on any cpu + */ + _PR_THREAD_LOCK(me); + me->md.interrupt_disabled = PR_FALSE; + me->md.thr_bound_cpu = NULL; + me->io_suspended = PR_FALSE; + me->io_pending = PR_FALSE; + me->state = _PR_RUNNING; + _PR_THREAD_UNLOCK(me); + } + } + return rv; +} + +PRStatus +_PR_MD_SET_FD_INHERITABLE(PRFileDesc *fd, PRBool inheritable) +{ + BOOL rv; + + if (fd->secret->md.io_model_committed) { + PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0); + return PR_FAILURE; + } + rv = SetHandleInformation( + (HANDLE)fd->secret->md.osfd, + HANDLE_FLAG_INHERIT, + inheritable ? HANDLE_FLAG_INHERIT : 0); + if (0 == rv) { + _PR_MD_MAP_DEFAULT_ERROR(GetLastError()); + return PR_FAILURE; + } + return PR_SUCCESS; +} + +void +_PR_MD_INIT_FD_INHERITABLE(PRFileDesc *fd, PRBool imported) +{ + if (imported) { + fd->secret->inheritable = _PR_TRI_UNKNOWN; + } else { + fd->secret->inheritable = _PR_TRI_FALSE; + } +} + +void +_PR_MD_QUERY_FD_INHERITABLE(PRFileDesc *fd) +{ + DWORD flags; + + PR_ASSERT(_PR_TRI_UNKNOWN == fd->secret->inheritable); + if (fd->secret->md.io_model_committed) { + return; + } + if (GetHandleInformation((HANDLE)fd->secret->md.osfd, &flags)) { + if (flags & HANDLE_FLAG_INHERIT) { + fd->secret->inheritable = _PR_TRI_TRUE; + } else { + fd->secret->inheritable = _PR_TRI_FALSE; + } + } +} + + +/* --- DIR IO ------------------------------------------------------------ */ +#define GetFileFromDIR(d) (d)->d_entry.cFileName +#define FileIsHidden(d) ((d)->d_entry.dwFileAttributes & FILE_ATTRIBUTE_HIDDEN) + +void FlipSlashes(char *cp, int len) +{ + while (--len >= 0) { + if (cp[0] == '/') { + cp[0] = PR_DIRECTORY_SEPARATOR; + } + cp = _mbsinc(cp); + } +} /* end FlipSlashes() */ + +/* +** +** Local implementations of standard Unix RTL functions which are not provided +** by the VC RTL. +** +*/ + +PRInt32 +_PR_MD_CLOSE_DIR(_MDDir *d) +{ + if ( d ) { + if (FindClose( d->d_hdl )) { + d->magic = (PRUint32)-1; + return 0; + } else { + _PR_MD_MAP_CLOSEDIR_ERROR(GetLastError()); + return -1; + } + } + PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0); + return -1; +} + + +PRStatus +_PR_MD_OPEN_DIR(_MDDir *d, const char *name) +{ + char filename[ MAX_PATH ]; + int len; + + len = strlen(name); + /* Need 5 bytes for \*.* and the trailing null byte. */ + if (len + 5 > MAX_PATH) { + PR_SetError(PR_NAME_TOO_LONG_ERROR, 0); + return PR_FAILURE; + } + strcpy(filename, name); + + /* + * If 'name' ends in a slash or backslash, do not append + * another backslash. + */ + if (IsPrevCharSlash(filename, filename + len)) { + len--; + } + strcpy(&filename[len], "\\*.*"); + FlipSlashes( filename, strlen(filename) ); + + d->d_hdl = FindFirstFile( filename, &(d->d_entry) ); + if ( d->d_hdl == INVALID_HANDLE_VALUE ) { + _PR_MD_MAP_OPENDIR_ERROR(GetLastError()); + return PR_FAILURE; + } + d->firstEntry = PR_TRUE; + d->magic = _MD_MAGIC_DIR; + return PR_SUCCESS; +} + +char * +_PR_MD_READ_DIR(_MDDir *d, PRIntn flags) +{ + PRInt32 err; + BOOL rv; + char *fileName; + + if ( d ) { + while (1) { + if (d->firstEntry) { + d->firstEntry = PR_FALSE; + rv = 1; + } else { + rv = FindNextFile(d->d_hdl, &(d->d_entry)); + } + if (rv == 0) { + break; + } + fileName = GetFileFromDIR(d); + if ( (flags & PR_SKIP_DOT) && + (fileName[0] == '.') && (fileName[1] == '\0')) { + continue; + } + if ( (flags & PR_SKIP_DOT_DOT) && + (fileName[0] == '.') && (fileName[1] == '.') && + (fileName[2] == '\0')) { + continue; + } + if ( (flags & PR_SKIP_HIDDEN) && FileIsHidden(d)) { + continue; + } + return fileName; + } + err = GetLastError(); + PR_ASSERT(NO_ERROR != err); + _PR_MD_MAP_READDIR_ERROR(err); + return NULL; + } + PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0); + return NULL; +} + +PRInt32 +_PR_MD_DELETE(const char *name) +{ + if (DeleteFile(name)) { + return 0; + } else { + _PR_MD_MAP_DELETE_ERROR(GetLastError()); + return -1; + } +} + +void +_PR_FileTimeToPRTime(const FILETIME *filetime, PRTime *prtm) +{ + PR_ASSERT(sizeof(FILETIME) == sizeof(PRTime)); + CopyMemory(prtm, filetime, sizeof(PRTime)); +#ifdef __GNUC__ + *prtm = (*prtm - _pr_filetime_offset) / 10LL; +#else + *prtm = (*prtm - _pr_filetime_offset) / 10i64; +#endif + +#ifdef DEBUG + /* Doublecheck our calculation. */ + { + SYSTEMTIME systime; + PRExplodedTime etm; + PRTime cmp; /* for comparison */ + BOOL rv; + + rv = FileTimeToSystemTime(filetime, &systime); + PR_ASSERT(0 != rv); + + /* + * PR_ImplodeTime ignores wday and yday. + */ + etm.tm_usec = systime.wMilliseconds * PR_USEC_PER_MSEC; + etm.tm_sec = systime.wSecond; + etm.tm_min = systime.wMinute; + etm.tm_hour = systime.wHour; + etm.tm_mday = systime.wDay; + etm.tm_month = systime.wMonth - 1; + etm.tm_year = systime.wYear; + /* + * It is not well-documented what time zone the FILETIME's + * are in. WIN32_FIND_DATA is documented to be in UTC (GMT). + * But BY_HANDLE_FILE_INFORMATION is unclear about this. + * By our best judgement, we assume that FILETIME is in UTC. + */ + etm.tm_params.tp_gmt_offset = 0; + etm.tm_params.tp_dst_offset = 0; + cmp = PR_ImplodeTime(&etm); + + /* + * SYSTEMTIME is in milliseconds precision, so we convert PRTime's + * microseconds to milliseconds before doing the comparison. + */ + PR_ASSERT((cmp / PR_USEC_PER_MSEC) == (*prtm / PR_USEC_PER_MSEC)); + } +#endif /* DEBUG */ +} + +PRInt32 +_PR_MD_STAT(const char *fn, struct stat *info) +{ + PRInt32 rv; + + rv = _stat(fn, (struct _stat *)info); + if (-1 == rv) { + /* + * Check for MSVC runtime library _stat() bug. + * (It's really a bug in FindFirstFile().) + * If a pathname ends in a backslash or slash, + * e.g., c:\temp\ or c:/temp/, _stat() will fail. + * Note: a pathname ending in a slash (e.g., c:/temp/) + * can be handled by _stat() on NT but not on Win95. + * + * We remove the backslash or slash at the end and + * try again. + */ + + int len = strlen(fn); + if (len > 0 && len <= _MAX_PATH + && IsPrevCharSlash(fn, fn + len)) { + char newfn[_MAX_PATH + 1]; + + strcpy(newfn, fn); + newfn[len - 1] = '\0'; + rv = _stat(newfn, (struct _stat *)info); + } + } + + if (-1 == rv) { + _PR_MD_MAP_STAT_ERROR(errno); + } + return rv; +} + +#define _PR_IS_SLASH(ch) ((ch) == '/' || (ch) == '\\') + +static PRBool +IsPrevCharSlash(const char *str, const char *current) +{ + const char *prev; + + if (str >= current) { + return PR_FALSE; + } + prev = _mbsdec(str, current); + return (prev == current - 1) && _PR_IS_SLASH(*prev); +} + +/* + * IsRootDirectory -- + * + * Return PR_TRUE if the pathname 'fn' is a valid root directory, + * else return PR_FALSE. The char buffer pointed to by 'fn' must + * be writable. During the execution of this function, the contents + * of the buffer pointed to by 'fn' may be modified, but on return + * the original contents will be restored. 'buflen' is the size of + * the buffer pointed to by 'fn'. + * + * Root directories come in three formats: + * 1. / or \, meaning the root directory of the current drive. + * 2. C:/ or C:\, where C is a drive letter. + * 3. \\<server name>\<share point name>\ or + * \\<server name>\<share point name>, meaning the root directory + * of a UNC (Universal Naming Convention) name. + */ + +static PRBool +IsRootDirectory(char *fn, size_t buflen) +{ + char *p; + PRBool slashAdded = PR_FALSE; + PRBool rv = PR_FALSE; + + if (_PR_IS_SLASH(fn[0]) && fn[1] == '\0') { + return PR_TRUE; + } + + if (isalpha(fn[0]) && fn[1] == ':' && _PR_IS_SLASH(fn[2]) + && fn[3] == '\0') { + rv = GetDriveType(fn) > 1 ? PR_TRUE : PR_FALSE; + return rv; + } + + /* The UNC root directory */ + + if (_PR_IS_SLASH(fn[0]) && _PR_IS_SLASH(fn[1])) { + /* The 'server' part should have at least one character. */ + p = &fn[2]; + if (*p == '\0' || _PR_IS_SLASH(*p)) { + return PR_FALSE; + } + + /* look for the next slash */ + do { + p = _mbsinc(p); + } while (*p != '\0' && !_PR_IS_SLASH(*p)); + if (*p == '\0') { + return PR_FALSE; + } + + /* The 'share' part should have at least one character. */ + p++; + if (*p == '\0' || _PR_IS_SLASH(*p)) { + return PR_FALSE; + } + + /* look for the final slash */ + do { + p = _mbsinc(p); + } while (*p != '\0' && !_PR_IS_SLASH(*p)); + if (_PR_IS_SLASH(*p) && p[1] != '\0') { + return PR_FALSE; + } + if (*p == '\0') { + /* + * GetDriveType() doesn't work correctly if the + * path is of the form \\server\share, so we add + * a final slash temporarily. + */ + if ((p + 1) < (fn + buflen)) { + *p++ = '\\'; + *p = '\0'; + slashAdded = PR_TRUE; + } else { + return PR_FALSE; /* name too long */ + } + } + rv = GetDriveType(fn) > 1 ? PR_TRUE : PR_FALSE; + /* restore the 'fn' buffer */ + if (slashAdded) { + *--p = '\0'; + } + } + return rv; +} + +PRInt32 +_PR_MD_GETFILEINFO64(const char *fn, PRFileInfo64 *info) +{ + WIN32_FILE_ATTRIBUTE_DATA findFileData; + + if (NULL == fn || '\0' == *fn) { + PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0); + return -1; + } + + if (!GetFileAttributesEx(fn, GetFileExInfoStandard, &findFileData)) { + _PR_MD_MAP_OPENDIR_ERROR(GetLastError()); + return -1; + } + + if (findFileData.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) { + info->type = PR_FILE_DIRECTORY; + } else { + info->type = PR_FILE_FILE; + } + + info->size = findFileData.nFileSizeHigh; + info->size = (info->size << 32) + findFileData.nFileSizeLow; + + _PR_FileTimeToPRTime(&findFileData.ftLastWriteTime, &info->modifyTime); + + if (0 == findFileData.ftCreationTime.dwLowDateTime && + 0 == findFileData.ftCreationTime.dwHighDateTime) { + info->creationTime = info->modifyTime; + } else { + _PR_FileTimeToPRTime(&findFileData.ftCreationTime, + &info->creationTime); + } + + return 0; +} + +PRInt32 +_PR_MD_GETFILEINFO(const char *fn, PRFileInfo *info) +{ + PRFileInfo64 info64; + PRInt32 rv = _PR_MD_GETFILEINFO64(fn, &info64); + if (0 == rv) + { + info->type = info64.type; + info->size = (PRUint32) info64.size; + info->modifyTime = info64.modifyTime; + info->creationTime = info64.creationTime; + } + return rv; +} + +PRInt32 +_PR_MD_GETOPENFILEINFO64(const PRFileDesc *fd, PRFileInfo64 *info) +{ + int rv; + + BY_HANDLE_FILE_INFORMATION hinfo; + + rv = GetFileInformationByHandle((HANDLE)fd->secret->md.osfd, &hinfo); + if (rv == FALSE) { + _PR_MD_MAP_FSTAT_ERROR(GetLastError()); + return -1; + } + + if (hinfo.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) { + info->type = PR_FILE_DIRECTORY; + } + else { + info->type = PR_FILE_FILE; + } + + info->size = hinfo.nFileSizeHigh; + info->size = (info->size << 32) + hinfo.nFileSizeLow; + + _PR_FileTimeToPRTime(&hinfo.ftLastWriteTime, &(info->modifyTime) ); + _PR_FileTimeToPRTime(&hinfo.ftCreationTime, &(info->creationTime) ); + + return 0; +} + +PRInt32 +_PR_MD_GETOPENFILEINFO(const PRFileDesc *fd, PRFileInfo *info) +{ + int rv; + + BY_HANDLE_FILE_INFORMATION hinfo; + + rv = GetFileInformationByHandle((HANDLE)fd->secret->md.osfd, &hinfo); + if (rv == FALSE) { + _PR_MD_MAP_FSTAT_ERROR(GetLastError()); + return -1; + } + + if (hinfo.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) { + info->type = PR_FILE_DIRECTORY; + } + else { + info->type = PR_FILE_FILE; + } + + info->size = hinfo.nFileSizeLow; + + _PR_FileTimeToPRTime(&hinfo.ftLastWriteTime, &(info->modifyTime) ); + _PR_FileTimeToPRTime(&hinfo.ftCreationTime, &(info->creationTime) ); + + return 0; +} + +PRInt32 +_PR_MD_RENAME(const char *from, const char *to) +{ + /* Does this work with dot-relative pathnames? */ + if (MoveFile(from, to)) { + return 0; + } else { + _PR_MD_MAP_RENAME_ERROR(GetLastError()); + return -1; + } +} + +PRInt32 +_PR_MD_ACCESS(const char *name, PRAccessHow how) +{ + PRInt32 rv; + + switch (how) { + case PR_ACCESS_WRITE_OK: + rv = _access(name, 02); + break; + case PR_ACCESS_READ_OK: + rv = _access(name, 04); + break; + case PR_ACCESS_EXISTS: + rv = _access(name, 00); + break; + default: + PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0); + return -1; + } + if (rv < 0) { + _PR_MD_MAP_ACCESS_ERROR(errno); + } + return rv; +} + +PRInt32 +_PR_MD_MKDIR(const char *name, PRIntn mode) +{ + /* XXXMB - how to translate the "mode"??? */ + if (CreateDirectory(name, NULL)) { + return 0; + } else { + _PR_MD_MAP_MKDIR_ERROR(GetLastError()); + return -1; + } +} + +PRInt32 +_PR_MD_MAKE_DIR(const char *name, PRIntn mode) +{ + BOOL rv; + SECURITY_ATTRIBUTES sa; + LPSECURITY_ATTRIBUTES lpSA = NULL; + PSECURITY_DESCRIPTOR pSD = NULL; + PACL pACL = NULL; + + if (_PR_NT_MakeSecurityDescriptorACL(mode, dirAccessTable, + &pSD, &pACL) == PR_SUCCESS) { + sa.nLength = sizeof(sa); + sa.lpSecurityDescriptor = pSD; + sa.bInheritHandle = FALSE; + lpSA = &sa; + } + rv = CreateDirectory(name, lpSA); + if (lpSA != NULL) { + _PR_NT_FreeSecurityDescriptorACL(pSD, pACL); + } + if (rv) { + return 0; + } else { + _PR_MD_MAP_MKDIR_ERROR(GetLastError()); + return -1; + } +} + +PRInt32 +_PR_MD_RMDIR(const char *name) +{ + if (RemoveDirectory(name)) { + return 0; + } else { + _PR_MD_MAP_RMDIR_ERROR(GetLastError()); + return -1; + } +} + +PRStatus +_PR_MD_LOCKFILE(PROsfd f) +{ + PRInt32 rv, err; + PRThread *me = _PR_MD_CURRENT_THREAD(); + + if (me->io_suspended) { + PR_SetError(PR_INVALID_STATE_ERROR, 0); + return PR_FAILURE; + } + + memset(&(me->md.overlapped.overlapped), 0, sizeof(OVERLAPPED)); + + _PR_THREAD_LOCK(me); + if (_PR_PENDING_INTERRUPT(me)) { + me->flags &= ~_PR_INTERRUPT; + PR_SetError(PR_PENDING_INTERRUPT_ERROR, 0); + _PR_THREAD_UNLOCK(me); + return -1; + } + me->io_pending = PR_TRUE; + me->state = _PR_IO_WAIT; + _PR_THREAD_UNLOCK(me); + + rv = LockFileEx((HANDLE)f, + LOCKFILE_EXCLUSIVE_LOCK, + 0, + 0x7fffffff, + 0, + &me->md.overlapped.overlapped); + + if (_native_threads_only) { + _PR_THREAD_LOCK(me); + me->io_pending = PR_FALSE; + me->state = _PR_RUNNING; + if (_PR_PENDING_INTERRUPT(me)) { + me->flags &= ~_PR_INTERRUPT; + PR_SetError(PR_PENDING_INTERRUPT_ERROR, 0); + _PR_THREAD_UNLOCK(me); + return PR_FAILURE; + } + _PR_THREAD_UNLOCK(me); + + if (rv == FALSE) { + err = GetLastError(); + PR_ASSERT(err != ERROR_IO_PENDING); + _PR_MD_MAP_LOCKF_ERROR(err); + return PR_FAILURE; + } + return PR_SUCCESS; + } + + /* HACK AROUND NT BUG + * NT 3.51 has a bug. In NT 3.51, if LockFileEx returns true, you + * don't get any completion on the completion port. This is a bug. + * + * They fixed it on NT4.0 so that you do get a completion. + * + * If we pretend we won't get a completion, NSPR gets confused later + * when the unexpected completion arrives. If we assume we do get + * a completion, we hang on 3.51. Worse, Microsoft informs me that the + * behavior varies on 3.51 depending on if you are using a network + * file system or a local disk! + * + * Solution: For now, _nt_version_gets_lockfile_completion is set + * depending on whether or not this system is EITHER + * - running NT 4.0 + * - running NT 3.51 with a service pack greater than 5. + * + * In the meantime, this code may not work on network file systems. + * + */ + + if ( rv == FALSE && ((err = GetLastError()) != ERROR_IO_PENDING)) { + _PR_THREAD_LOCK(me); + me->io_pending = PR_FALSE; + me->state = _PR_RUNNING; + if (_PR_PENDING_INTERRUPT(me)) { + me->flags &= ~_PR_INTERRUPT; + PR_SetError(PR_PENDING_INTERRUPT_ERROR, 0); + _PR_THREAD_UNLOCK(me); + return PR_FAILURE; + } + _PR_THREAD_UNLOCK(me); + + _PR_MD_MAP_LOCKF_ERROR(err); + return PR_FAILURE; + } +#ifdef _NEED_351_FILE_LOCKING_HACK + else if (rv) { + /* If this is NT 3.51 and the file is local, then we won't get a + * completion back from LockFile when it succeeded. + */ + if (_nt_version_gets_lockfile_completion == PR_FALSE) { + if ( IsFileLocal((HANDLE)f) == _PR_LOCAL_FILE) { + me->io_pending = PR_FALSE; + me->state = _PR_RUNNING; + return PR_SUCCESS; + } + } + } +#endif /* _NEED_351_FILE_LOCKING_HACK */ + + if (_NT_IO_WAIT(me, PR_INTERVAL_NO_TIMEOUT) == PR_FAILURE) { + _PR_THREAD_LOCK(me); + me->io_pending = PR_FALSE; + me->state = _PR_RUNNING; + _PR_THREAD_UNLOCK(me); + return PR_FAILURE; + } + + if (me->md.blocked_io_status == 0) { + _PR_MD_MAP_LOCKF_ERROR(me->md.blocked_io_error); + return PR_FAILURE; + } + + return PR_SUCCESS; +} + +PRStatus +_PR_MD_TLOCKFILE(PROsfd f) +{ + PRInt32 rv, err; + PRThread *me = _PR_MD_CURRENT_THREAD(); + + if (me->io_suspended) { + PR_SetError(PR_INVALID_STATE_ERROR, 0); + return PR_FAILURE; + } + + memset(&(me->md.overlapped.overlapped), 0, sizeof(OVERLAPPED)); + + _PR_THREAD_LOCK(me); + if (_PR_PENDING_INTERRUPT(me)) { + me->flags &= ~_PR_INTERRUPT; + PR_SetError(PR_PENDING_INTERRUPT_ERROR, 0); + _PR_THREAD_UNLOCK(me); + return -1; + } + me->io_pending = PR_TRUE; + me->state = _PR_IO_WAIT; + _PR_THREAD_UNLOCK(me); + + rv = LockFileEx((HANDLE)f, + LOCKFILE_FAIL_IMMEDIATELY|LOCKFILE_EXCLUSIVE_LOCK, + 0, + 0x7fffffff, + 0, + &me->md.overlapped.overlapped); + if (_native_threads_only) { + _PR_THREAD_LOCK(me); + me->io_pending = PR_FALSE; + me->state = _PR_RUNNING; + if (_PR_PENDING_INTERRUPT(me)) { + me->flags &= ~_PR_INTERRUPT; + PR_SetError(PR_PENDING_INTERRUPT_ERROR, 0); + _PR_THREAD_UNLOCK(me); + return PR_FAILURE; + } + _PR_THREAD_UNLOCK(me); + + if (rv == FALSE) { + err = GetLastError(); + PR_ASSERT(err != ERROR_IO_PENDING); + _PR_MD_MAP_LOCKF_ERROR(err); + return PR_FAILURE; + } + return PR_SUCCESS; + } + if ( rv == FALSE && ((err = GetLastError()) != ERROR_IO_PENDING)) { + _PR_THREAD_LOCK(me); + me->io_pending = PR_FALSE; + me->state = _PR_RUNNING; + if (_PR_PENDING_INTERRUPT(me)) { + me->flags &= ~_PR_INTERRUPT; + PR_SetError(PR_PENDING_INTERRUPT_ERROR, 0); + _PR_THREAD_UNLOCK(me); + return PR_FAILURE; + } + _PR_THREAD_UNLOCK(me); + + _PR_MD_MAP_LOCKF_ERROR(err); + return PR_FAILURE; + } +#ifdef _NEED_351_FILE_LOCKING_HACK + else if (rv) { + /* If this is NT 3.51 and the file is local, then we won't get a + * completion back from LockFile when it succeeded. + */ + if (_nt_version_gets_lockfile_completion == PR_FALSE) { + if ( IsFileLocal((HANDLE)f) == _PR_LOCAL_FILE) { + _PR_THREAD_LOCK(me); + me->io_pending = PR_FALSE; + me->state = _PR_RUNNING; + if (_PR_PENDING_INTERRUPT(me)) { + me->flags &= ~_PR_INTERRUPT; + PR_SetError(PR_PENDING_INTERRUPT_ERROR, 0); + _PR_THREAD_UNLOCK(me); + return PR_FAILURE; + } + _PR_THREAD_UNLOCK(me); + + return PR_SUCCESS; + } + } + } +#endif /* _NEED_351_FILE_LOCKING_HACK */ + + if (_NT_IO_WAIT(me, PR_INTERVAL_NO_TIMEOUT) == PR_FAILURE) { + _PR_THREAD_LOCK(me); + me->io_pending = PR_FALSE; + me->state = _PR_RUNNING; + if (_PR_PENDING_INTERRUPT(me)) { + me->flags &= ~_PR_INTERRUPT; + PR_SetError(PR_PENDING_INTERRUPT_ERROR, 0); + _PR_THREAD_UNLOCK(me); + return PR_FAILURE; + } + _PR_THREAD_UNLOCK(me); + + return PR_FAILURE; + } + + if (me->md.blocked_io_status == 0) { + _PR_MD_MAP_LOCKF_ERROR(me->md.blocked_io_error); + return PR_FAILURE; + } + + return PR_SUCCESS; +} + + +PRStatus +_PR_MD_UNLOCKFILE(PROsfd f) +{ + PRInt32 rv; + PRThread *me = _PR_MD_CURRENT_THREAD(); + + if (me->io_suspended) { + PR_SetError(PR_INVALID_STATE_ERROR, 0); + return PR_FAILURE; + } + + memset(&(me->md.overlapped.overlapped), 0, sizeof(OVERLAPPED)); + + rv = UnlockFileEx((HANDLE)f, + 0, + 0x7fffffff, + 0, + &me->md.overlapped.overlapped); + + if (rv) { + return PR_SUCCESS; + } + else { + int err = GetLastError(); + _PR_MD_MAP_LOCKF_ERROR(err); + return PR_FAILURE; + } +} + +void +_PR_MD_MAKE_NONBLOCK(PRFileDesc *f) +{ + /* + * On NT, we either call _md_Associate() or _md_MakeNonblock(), + * depending on whether the socket is blocking or not. + * + * Once we associate a socket with the io completion port, + * there is no way to disassociate it from the io completion + * port. So we have to call _md_Associate/_md_MakeNonblock + * lazily. + */ +} + +#ifdef _NEED_351_FILE_LOCKING_HACK +/*************** +** +** Lockfile hacks +** +** The following code is a hack to work around a microsoft bug with lockfile. +** The problem is that on NT 3.51, if LockFileEx() succeeds, you never +** get a completion back for files that are on local disks. So, we need to +** know if a file is local or remote so we can tell if we should expect +** a completion. +** +** The only way to check if a file is local or remote based on the handle is +** to get the serial number for the volume it is mounted on and then to +** compare that with mounted drives. This code caches the volume numbers of +** fixed disks and does a relatively quick check. +** +** Locking: Since the only thing we ever do when multithreaded is a 32bit +** assignment, we probably don't need locking. It is included just +** case anyway. +** +** Limitations: Does not work on floppies because they are too slow +** Unknown if it will work on wierdo 3rd party file systems +** +**************** +*/ + +/* There can only be 26 drive letters on NT */ +#define _PR_MAX_DRIVES 26 + +_MDLock cachedVolumeLock; +DWORD dwCachedVolumeSerialNumbers[_PR_MAX_DRIVES] = {0}; +DWORD dwLastCachedDrive = 0; +DWORD dwRemoveableDrivesToCheck = 0; /* bitmask for removeable drives */ + +PRBool IsFileLocalInit() +{ + TCHAR lpBuffer[_PR_MAX_DRIVES*5]; + DWORD nBufferLength = _PR_MAX_DRIVES*5; + DWORD nBufferNeeded = GetLogicalDriveStrings(0, NULL); + DWORD dwIndex = 0; + DWORD dwDriveType; + DWORD dwVolumeSerialNumber; + DWORD dwDriveIndex = 0; + DWORD oldmode = (DWORD) -1; + + _MD_NEW_LOCK(&cachedVolumeLock); + + nBufferNeeded = GetLogicalDriveStrings(nBufferLength, lpBuffer); + if (nBufferNeeded == 0 || nBufferNeeded > nBufferLength) { + return PR_FALSE; + } + + // Calling GetVolumeInformation on a removeable drive where the + // disk is currently removed will cause a dialog box to the + // console. This is not good. + // Temporarily disable the SEM_FAILCRITICALERRORS to avoid the + // damn dialog. + + dwCachedVolumeSerialNumbers[dwDriveIndex] = 0; + oldmode = SetErrorMode(SEM_FAILCRITICALERRORS); + + // now loop through the logical drives + while(lpBuffer[dwIndex] != TEXT('\0')) + { + // skip the floppy drives. This is *SLOW* + if ((lpBuffer[dwIndex] == TEXT('A')) || (lpBuffer[dwIndex] == TEXT('B'))) + /* Skip over floppies */; + else + { + dwDriveIndex = (lpBuffer[dwIndex] - TEXT('A')); + + dwDriveType = GetDriveType(&lpBuffer[dwIndex]); + + switch(dwDriveType) + { + // Ignore these drive types + case 0: + case 1: + case DRIVE_REMOTE: + default: // If the drive type is unknown, ignore it. + break; + + // Removable media drives can have different serial numbers + // at different times, so cache the current serial number + // but keep track of them so they can be rechecked if necessary. + case DRIVE_REMOVABLE: + + // CDROM is a removable media + case DRIVE_CDROM: + + // no idea if ramdisks can change serial numbers or not + // but it doesn't hurt to treat them as removable. + + case DRIVE_RAMDISK: + + + // Here is where we keep track of removable drives. + dwRemoveableDrivesToCheck |= 1 << dwDriveIndex; + + // removable drives fall through to fixed drives and get cached. + + case DRIVE_FIXED: + + // cache volume serial numbers. + if (GetVolumeInformation( + &lpBuffer[dwIndex], + NULL, 0, + &dwVolumeSerialNumber, + NULL, NULL, NULL, 0) + ) + { + if (dwLastCachedDrive < dwDriveIndex) { + dwLastCachedDrive = dwDriveIndex; + } + dwCachedVolumeSerialNumbers[dwDriveIndex] = dwVolumeSerialNumber; + } + + break; + } + } + + dwIndex += lstrlen(&lpBuffer[dwIndex]) +1; + } + + if (oldmode != (DWORD) -1) { + SetErrorMode(oldmode); + oldmode = (DWORD) -1; + } + + return PR_TRUE; +} + +PRInt32 IsFileLocal(HANDLE hFile) +{ + DWORD dwIndex = 0, dwMask; + BY_HANDLE_FILE_INFORMATION Info; + TCHAR szDrive[4] = TEXT("C:\\"); + DWORD dwVolumeSerialNumber; + DWORD oldmode = (DWORD) -1; + int rv = _PR_REMOTE_FILE; + + if (!GetFileInformationByHandle(hFile, &Info)) { + return -1; + } + + // look to see if the volume serial number has been cached. + _MD_LOCK(&cachedVolumeLock); + while(dwIndex <= dwLastCachedDrive) + if (dwCachedVolumeSerialNumbers[dwIndex++] == Info.dwVolumeSerialNumber) + { + _MD_UNLOCK(&cachedVolumeLock); + return _PR_LOCAL_FILE; + } + _MD_UNLOCK(&cachedVolumeLock); + + // volume serial number not found in the cache. Check removable files. + // removable drives are noted as a bitmask. If the bit associated with + // a specific drive is set, then we should query its volume serial number + // as its possible it has changed. + dwMask = dwRemoveableDrivesToCheck; + dwIndex = 0; + + while(dwMask) + { + while(!(dwMask & 1)) + { + dwIndex++; + dwMask = dwMask >> 1; + } + + szDrive[0] = TEXT('A')+ (TCHAR) dwIndex; + + // Calling GetVolumeInformation on a removeable drive where the + // disk is currently removed will cause a dialog box to the + // console. This is not good. + // Temporarily disable the SEM_FAILCRITICALERRORS to avoid the + // dialog. + + oldmode = SetErrorMode(SEM_FAILCRITICALERRORS); + + if (GetVolumeInformation( + szDrive, + NULL, 0, + &dwVolumeSerialNumber, + NULL, NULL, NULL, 0) + ) + { + if (dwVolumeSerialNumber == Info.dwVolumeSerialNumber) + { + _MD_LOCK(&cachedVolumeLock); + if (dwLastCachedDrive < dwIndex) { + dwLastCachedDrive = dwIndex; + } + dwCachedVolumeSerialNumbers[dwIndex] = dwVolumeSerialNumber; + _MD_UNLOCK(&cachedVolumeLock); + rv = _PR_LOCAL_FILE; + } + } + if (oldmode != (DWORD) -1) { + SetErrorMode(oldmode); + oldmode = (DWORD) -1; + } + + if (rv == _PR_LOCAL_FILE) { + return _PR_LOCAL_FILE; + } + + dwIndex++; + dwMask = dwMask >> 1; + } + + return _PR_REMOTE_FILE; +} +#endif /* _NEED_351_FILE_LOCKING_HACK */ + +PR_IMPLEMENT(PRStatus) PR_NT_CancelIo(PRFileDesc *fd) +{ + PRThread *me = _PR_MD_CURRENT_THREAD(); + PRBool fWait; + PRFileDesc *bottom; + + bottom = PR_GetIdentitiesLayer(fd, PR_NSPR_IO_LAYER); + if (!me->io_suspended || (NULL == bottom) || + (me->io_fd != bottom->secret->md.osfd)) { + PR_SetError(PR_INVALID_STATE_ERROR, 0); + return PR_FAILURE; + } + /* + * The CancelIO operation has to be issued by the same NT thread that + * issued the I/O operation + */ + PR_ASSERT(_PR_IS_NATIVE_THREAD(me) || (me->cpu == me->md.thr_bound_cpu)); + if (me->io_pending) { + if (!CancelIo((HANDLE)bottom->secret->md.osfd)) { + PR_SetError(PR_INVALID_STATE_ERROR, GetLastError()); + return PR_FAILURE; + } + } + _PR_THREAD_LOCK(me); + fWait = me->io_pending; + me->io_suspended = PR_FALSE; + me->state = _PR_IO_WAIT; + me->md.interrupt_disabled = PR_TRUE; + _PR_THREAD_UNLOCK(me); + if (fWait) { + _NT_IO_WAIT(me, PR_INTERVAL_NO_TIMEOUT); + } + PR_ASSERT(me->io_suspended == PR_FALSE); + PR_ASSERT(me->io_pending == PR_FALSE); + + _PR_THREAD_LOCK(me); + me->md.interrupt_disabled = PR_FALSE; + me->md.thr_bound_cpu = NULL; + me->io_suspended = PR_FALSE; + me->io_pending = PR_FALSE; + me->state = _PR_RUNNING; + _PR_THREAD_UNLOCK(me); + return PR_SUCCESS; +} + +static PROsfd _nt_nonblock_accept(PRFileDesc *fd, struct sockaddr *addr, int *addrlen, PRIntervalTime timeout) +{ + PROsfd osfd = fd->secret->md.osfd; + SOCKET sock; + PRInt32 rv, err; + fd_set rd; + struct timeval tv, *tvp; + + FD_ZERO(&rd); + FD_SET((SOCKET)osfd, &rd); + if (timeout == PR_INTERVAL_NO_TIMEOUT) { + while ((sock = accept(osfd, addr, addrlen)) == -1) { + if (((err = WSAGetLastError()) == WSAEWOULDBLOCK) + && (!fd->secret->nonblocking)) { + if ((rv = _PR_NTFiberSafeSelect(0, &rd, NULL, NULL, + NULL)) == -1) { + _PR_MD_MAP_SELECT_ERROR(WSAGetLastError()); + break; + } + } else { + _PR_MD_MAP_ACCEPT_ERROR(err); + break; + } + } + } else if (timeout == PR_INTERVAL_NO_WAIT) { + if ((sock = accept(osfd, addr, addrlen)) == -1) { + if (((err = WSAGetLastError()) == WSAEWOULDBLOCK) + && (!fd->secret->nonblocking)) { + PR_SetError(PR_IO_TIMEOUT_ERROR, 0); + } else { + _PR_MD_MAP_ACCEPT_ERROR(err); + } + } + } else { +retry: + if ((sock = accept(osfd, addr, addrlen)) == -1) { + if (((err = WSAGetLastError()) == WSAEWOULDBLOCK) + && (!fd->secret->nonblocking)) { + tv.tv_sec = PR_IntervalToSeconds(timeout); + tv.tv_usec = PR_IntervalToMicroseconds( + timeout - PR_SecondsToInterval(tv.tv_sec)); + tvp = &tv; + + rv = _PR_NTFiberSafeSelect(0, &rd, NULL, NULL, tvp); + if (rv > 0) { + goto retry; + } else if (rv == 0) { + PR_SetError(PR_IO_TIMEOUT_ERROR, 0); + } else { + _PR_MD_MAP_SELECT_ERROR(WSAGetLastError()); + } + } else { + _PR_MD_MAP_ACCEPT_ERROR(err); + } + } + } + return (PROsfd)sock; +} + +static PRInt32 _nt_nonblock_connect(PRFileDesc *fd, struct sockaddr *addr, int addrlen, PRIntervalTime timeout) +{ + PROsfd osfd = fd->secret->md.osfd; + PRInt32 rv; + int err; + fd_set wr, ex; + struct timeval tv, *tvp; + int len; + + if ((rv = connect(osfd, addr, addrlen)) == -1) { + if ((err = WSAGetLastError()) == WSAEWOULDBLOCK) { + if ( timeout == PR_INTERVAL_NO_TIMEOUT ) { + tvp = NULL; + } else { + tv.tv_sec = PR_IntervalToSeconds(timeout); + tv.tv_usec = PR_IntervalToMicroseconds( + timeout - PR_SecondsToInterval(tv.tv_sec)); + tvp = &tv; + } + FD_ZERO(&wr); + FD_ZERO(&ex); + FD_SET((SOCKET)osfd, &wr); + FD_SET((SOCKET)osfd, &ex); + if ((rv = _PR_NTFiberSafeSelect(0, NULL, &wr, &ex, + tvp)) == -1) { + _PR_MD_MAP_SELECT_ERROR(WSAGetLastError()); + return rv; + } + if (rv == 0) { + PR_SetError(PR_IO_TIMEOUT_ERROR, 0); + return -1; + } + /* Call Sleep(0) to work around a Winsock timeing bug. */ + Sleep(0); + if (FD_ISSET((SOCKET)osfd, &ex)) { + len = sizeof(err); + if (getsockopt(osfd, SOL_SOCKET, SO_ERROR, + (char *) &err, &len) == SOCKET_ERROR) { + _PR_MD_MAP_GETSOCKOPT_ERROR(WSAGetLastError()); + return -1; + } + _PR_MD_MAP_CONNECT_ERROR(err); + return -1; + } + PR_ASSERT(FD_ISSET((SOCKET)osfd, &wr)); + rv = 0; + } else { + _PR_MD_MAP_CONNECT_ERROR(err); + } + } + return rv; +} + +static PRInt32 _nt_nonblock_recv(PRFileDesc *fd, char *buf, int len, int flags, PRIntervalTime timeout) +{ + PROsfd osfd = fd->secret->md.osfd; + PRInt32 rv, err; + struct timeval tv, *tvp; + fd_set rd; + int osflags; + + if (0 == flags) { + osflags = 0; + } else { + PR_ASSERT(PR_MSG_PEEK == flags); + osflags = MSG_PEEK; + } + while ((rv = recv(osfd,buf,len,osflags)) == -1) { + if (((err = WSAGetLastError()) == WSAEWOULDBLOCK) + && (!fd->secret->nonblocking)) { + FD_ZERO(&rd); + FD_SET((SOCKET)osfd, &rd); + if (timeout == PR_INTERVAL_NO_TIMEOUT) { + tvp = NULL; + } else { + tv.tv_sec = PR_IntervalToSeconds(timeout); + tv.tv_usec = PR_IntervalToMicroseconds( + timeout - PR_SecondsToInterval(tv.tv_sec)); + tvp = &tv; + } + if ((rv = _PR_NTFiberSafeSelect(0, &rd, NULL, NULL, + tvp)) == -1) { + _PR_MD_MAP_SELECT_ERROR(WSAGetLastError()); + break; + } else if (rv == 0) { + PR_SetError(PR_IO_TIMEOUT_ERROR, 0); + rv = -1; + break; + } + } else { + _PR_MD_MAP_RECV_ERROR(err); + break; + } + } + return(rv); +} + +static PRInt32 _nt_nonblock_send(PRFileDesc *fd, char *buf, int len, PRIntervalTime timeout) +{ + PROsfd osfd = fd->secret->md.osfd; + PRInt32 rv, err; + struct timeval tv, *tvp; + fd_set wd; + PRInt32 bytesSent = 0; + + while(bytesSent < len) { + while ((rv = send(osfd,buf,len,0)) == -1) { + if (((err = WSAGetLastError()) == WSAEWOULDBLOCK) + && (!fd->secret->nonblocking)) { + if ( timeout == PR_INTERVAL_NO_TIMEOUT ) { + tvp = NULL; + } else { + tv.tv_sec = PR_IntervalToSeconds(timeout); + tv.tv_usec = PR_IntervalToMicroseconds( + timeout - PR_SecondsToInterval(tv.tv_sec)); + tvp = &tv; + } + FD_ZERO(&wd); + FD_SET((SOCKET)osfd, &wd); + if ((rv = _PR_NTFiberSafeSelect(0, NULL, &wd, NULL, + tvp)) == -1) { + _PR_MD_MAP_SELECT_ERROR(WSAGetLastError()); + return -1; + } + if (rv == 0) { + PR_SetError(PR_IO_TIMEOUT_ERROR, 0); + return -1; + } + } else { + _PR_MD_MAP_SEND_ERROR(err); + return -1; + } + } + bytesSent += rv; + if (fd->secret->nonblocking) { + break; + } + if (bytesSent < len) { + if ( timeout == PR_INTERVAL_NO_TIMEOUT ) { + tvp = NULL; + } else { + tv.tv_sec = PR_IntervalToSeconds(timeout); + tv.tv_usec = PR_IntervalToMicroseconds( + timeout - PR_SecondsToInterval(tv.tv_sec)); + tvp = &tv; + } + FD_ZERO(&wd); + FD_SET((SOCKET)osfd, &wd); + if ((rv = _PR_NTFiberSafeSelect(0, NULL, &wd, NULL, + tvp)) == -1) { + _PR_MD_MAP_SELECT_ERROR(WSAGetLastError()); + return -1; + } + if (rv == 0) { + PR_SetError(PR_IO_TIMEOUT_ERROR, 0); + return -1; + } + } + } + return bytesSent; +} + +static PRInt32 _nt_nonblock_writev(PRFileDesc *fd, const PRIOVec *iov, int size, PRIntervalTime timeout) +{ + int index; + int sent = 0; + int rv; + + for (index=0; index<size; index++) { + rv = _nt_nonblock_send(fd, iov[index].iov_base, iov[index].iov_len, timeout); + if (rv > 0) { + sent += rv; + } + if ( rv != iov[index].iov_len ) { + if (rv < 0) { + if (fd->secret->nonblocking + && (PR_GetError() == PR_WOULD_BLOCK_ERROR) + && (sent > 0)) { + return sent; + } else { + return -1; + } + } + /* Only a nonblocking socket can have partial sends */ + PR_ASSERT(fd->secret->nonblocking); + return sent; + } + } + + return sent; +} + +static PRInt32 _nt_nonblock_sendto( + PRFileDesc *fd, const char *buf, int len, + const struct sockaddr *addr, int addrlen, PRIntervalTime timeout) +{ + PROsfd osfd = fd->secret->md.osfd; + PRInt32 rv, err; + struct timeval tv, *tvp; + fd_set wd; + PRInt32 bytesSent = 0; + + while(bytesSent < len) { + while ((rv = sendto(osfd,buf,len,0, addr, addrlen)) == -1) { + if (((err = WSAGetLastError()) == WSAEWOULDBLOCK) + && (!fd->secret->nonblocking)) { + if ( timeout == PR_INTERVAL_NO_TIMEOUT ) { + tvp = NULL; + } else { + tv.tv_sec = PR_IntervalToSeconds(timeout); + tv.tv_usec = PR_IntervalToMicroseconds( + timeout - PR_SecondsToInterval(tv.tv_sec)); + tvp = &tv; + } + FD_ZERO(&wd); + FD_SET((SOCKET)osfd, &wd); + if ((rv = _PR_NTFiberSafeSelect(0, NULL, &wd, NULL, + tvp)) == -1) { + _PR_MD_MAP_SELECT_ERROR(WSAGetLastError()); + return -1; + } + if (rv == 0) { + PR_SetError(PR_IO_TIMEOUT_ERROR, 0); + return -1; + } + } else { + _PR_MD_MAP_SENDTO_ERROR(err); + return -1; + } + } + bytesSent += rv; + if (fd->secret->nonblocking) { + break; + } + if (bytesSent < len) { + if ( timeout == PR_INTERVAL_NO_TIMEOUT ) { + tvp = NULL; + } else { + tv.tv_sec = PR_IntervalToSeconds(timeout); + tv.tv_usec = PR_IntervalToMicroseconds( + timeout - PR_SecondsToInterval(tv.tv_sec)); + tvp = &tv; + } + FD_ZERO(&wd); + FD_SET((SOCKET)osfd, &wd); + if ((rv = _PR_NTFiberSafeSelect(0, NULL, &wd, NULL, + tvp)) == -1) { + _PR_MD_MAP_SELECT_ERROR(WSAGetLastError()); + return -1; + } + if (rv == 0) { + PR_SetError(PR_IO_TIMEOUT_ERROR, 0); + return -1; + } + } + } + return bytesSent; +} + +static PRInt32 _nt_nonblock_recvfrom(PRFileDesc *fd, char *buf, int len, struct sockaddr *addr, int *addrlen, PRIntervalTime timeout) +{ + PROsfd osfd = fd->secret->md.osfd; + PRInt32 rv, err; + struct timeval tv, *tvp; + fd_set rd; + + while ((rv = recvfrom(osfd,buf,len,0,addr, addrlen)) == -1) { + if (((err = WSAGetLastError()) == WSAEWOULDBLOCK) + && (!fd->secret->nonblocking)) { + if (timeout == PR_INTERVAL_NO_TIMEOUT) { + tvp = NULL; + } else { + tv.tv_sec = PR_IntervalToSeconds(timeout); + tv.tv_usec = PR_IntervalToMicroseconds( + timeout - PR_SecondsToInterval(tv.tv_sec)); + tvp = &tv; + } + FD_ZERO(&rd); + FD_SET((SOCKET)osfd, &rd); + if ((rv = _PR_NTFiberSafeSelect(0, &rd, NULL, NULL, + tvp)) == -1) { + _PR_MD_MAP_SELECT_ERROR(WSAGetLastError()); + break; + } else if (rv == 0) { + PR_SetError(PR_IO_TIMEOUT_ERROR, 0); + rv = -1; + break; + } + } else { + _PR_MD_MAP_RECVFROM_ERROR(err); + break; + } + } + return(rv); +} + +/* + * UDP support: the continuation thread functions and recvfrom and sendto. + */ + +static void pt_InsertTimedInternal(pt_Continuation *op) +{ + PRInt32 delta = 0; + pt_Continuation *t_op = NULL; + PRIntervalTime now = PR_IntervalNow(), op_tmo, qd_tmo; + + /* + * If this element operation isn't timed, it gets queued at the + * end of the list (just after pt_tq.tail) and we're + * finishd early. + */ + if (PR_INTERVAL_NO_TIMEOUT == op->timeout) + { + t_op = pt_tq.tail; /* put it at the end */ + goto done; + } + + /* + * The rest of this routine actaully deals with timed ops. + */ + + if (NULL != pt_tq.op) + { + /* + * To find where in the list to put the new operation, form + * the absolute time the operations in question will expire. + * + * The new operation ('op') will expire at now() + op->timeout. + * + * The operation that will time out furthest in the future will + * do so at pt_tq.epoch + pt_tq.op->timeout. + * + * Subsequently earlier timeouts are computed based on the latter + * knowledge by subracting the timeout deltas that are stored in + * the operation list. There are operation[n]->timeout ticks + * between the expiration of operation[n-1] and operation[n].e e + * + * Therefore, the operation[n-1] will expire operation[n]->timeout + * ticks prior to operation[n]. + * + * This should be easy! + */ + t_op = pt_tq.op; /* running pointer to queued op */ + op_tmo = now + op->timeout; /* that's in absolute ticks */ + qd_tmo = pt_tq.epoch + t_op->timeout; /* likewise */ + + do + { + /* + * If 'op' expires later than t_op, then insert 'op' just + * ahead of t_op. Otherwise, compute when operation[n-1] + * expires and try again. + * + * The actual different between the expiriation of 'op' + * and the current operation what becomes the new operaton's + * timeout interval. That interval is also subtracted from + * the interval of the operation immediately following where + * we stick 'op' (unless the next one isn't timed). The new + * timeout assigned to 'op' takes into account the values of + * now() and when the previous intervals were compured. + */ + delta = op_tmo - qd_tmo; + if (delta >= 0) + { + op->timeout += (now - pt_tq.epoch); + goto done; + } + + qd_tmo -= t_op->timeout; /* previous operaton expiration */ + t_op = t_op->prev; /* point to previous operation */ + if (NULL != t_op) { + qd_tmo += t_op->timeout; + } + } while (NULL != t_op); + + /* + * If we got here we backed off the head of the list. That means that + * this timed entry has to go at the head of the list. This is just + * about like having an empty timer list. + */ + delta = op->timeout; /* $$$ is this right? */ + } + +done: + + /* + * Insert 'op' into the queue just after t_op or if t_op is null, + * at the head of the list. + * + * If t_op is NULL, the list is currently empty and this is pretty + * easy. + */ + if (NULL == t_op) + { + op->prev = NULL; + op->next = pt_tq.head; + pt_tq.head = op; + if (NULL == pt_tq.tail) { + pt_tq.tail = op; + } + else { + op->next->prev = op; + } + } + else + { + op->prev = t_op; + op->next = t_op->next; + if (NULL != op->prev) { + op->prev->next = op; + } + if (NULL != op->next) { + op->next->prev = op; + } + if (t_op == pt_tq.tail) { + pt_tq.tail = op; + } + } + + /* + * Are we adjusting our epoch, etc? Are we replacing + * what was previously the element due to expire furthest + * out in the future? Is this even a timed operation? + */ + if (PR_INTERVAL_NO_TIMEOUT != op->timeout) + { + if ((NULL == pt_tq.op) /* we're the one and only */ + || (t_op == pt_tq.op)) /* we're replacing */ + { + pt_tq.op = op; + pt_tq.epoch = now; + } + } + + pt_tq.op_count += 1; + +} /* pt_InsertTimedInternal */ + +/* + * function: pt_FinishTimed + * + * Takes the finished operation out of the timed queue. It + * notifies the initiating thread that the opertions is + * complete and returns to the caller the value of the next + * operation in the list (or NULL). + */ +static pt_Continuation *pt_FinishTimedInternal(pt_Continuation *op) +{ + pt_Continuation *next; + + /* remove this one from the list */ + if (NULL == op->prev) { + pt_tq.head = op->next; + } + else { + op->prev->next = op->next; + } + if (NULL == op->next) { + pt_tq.tail = op->prev; + } + else { + op->next->prev = op->prev; + } + + /* did we happen to hit the timed op? */ + if (op == pt_tq.op) { + pt_tq.op = op->prev; + } + + next = op->next; + op->next = op->prev = NULL; + op->status = pt_continuation_done; + + pt_tq.op_count -= 1; +#if defined(DEBUG) + pt_debug.continuationsServed += 1; +#endif + PR_NotifyCondVar(op->complete); + + return next; +} /* pt_FinishTimedInternal */ + +static void ContinuationThread(void *arg) +{ + /* initialization */ + fd_set readSet, writeSet, exceptSet; + struct timeval tv; + SOCKET *pollingList = 0; /* list built for polling */ + PRIntn pollingListUsed; /* # entries used in the list */ + PRIntn pollingListNeeded; /* # entries needed this time */ + PRIntn pollingSlotsAllocated = 0; /* # entries available in list */ + PRIntervalTime mx_select_ticks = PR_MillisecondsToInterval(PT_DEFAULT_SELECT_MSEC); + + /* do some real work */ + while (1) + { + PRIntn rv; + PRStatus status; + PRIntn pollIndex; + pt_Continuation *op; + PRIntervalTime now = PR_IntervalNow(); + PRIntervalTime timeout = PR_INTERVAL_NO_TIMEOUT; + + PR_Lock(pt_tq.ml); + while (NULL == pt_tq.head) + { + status = PR_WaitCondVar(pt_tq.new_op, PR_INTERVAL_NO_TIMEOUT); + if ((PR_FAILURE == status) + && (PR_PENDING_INTERRUPT_ERROR == PR_GetError())) { + break; + } + } + pollingListNeeded = pt_tq.op_count; + PR_Unlock(pt_tq.ml); + + /* Okay. We're history */ + if ((PR_FAILURE == status) + && (PR_PENDING_INTERRUPT_ERROR == PR_GetError())) { + break; + } + + /* + * We are not holding the pt_tq.ml lock now, so more items may + * get added to pt_tq during this window of time. We hope + * that 10 more spaces in the polling list should be enough. + */ + + FD_ZERO(&readSet); + FD_ZERO(&writeSet); + FD_ZERO(&exceptSet); + pollingListNeeded += 10; + if (pollingListNeeded > pollingSlotsAllocated) + { + if (NULL != pollingList) { + PR_DELETE(pollingList); + } + pollingList = PR_MALLOC(pollingListNeeded * sizeof(PRPollDesc)); + PR_ASSERT(NULL != pollingList); + pollingSlotsAllocated = pollingListNeeded; + } + +#if defined(DEBUG) + if (pollingListNeeded > pt_debug.pollingListMax) { + pt_debug.pollingListMax = pollingListUsed; + } +#endif + + /* + * Build up a polling list. + * This list is sorted on time. Operations that have been + * interrupted are completed and not included in the list. + * There is an assertion that the operation is in progress. + */ + pollingListUsed = 0; + PR_Lock(pt_tq.ml); + + for (op = pt_tq.head; NULL != op;) + { + if (pt_continuation_abort == op->status) + { + op->result.code = -1; + op->syserrno = WSAEINTR; + op = pt_FinishTimedInternal(op); + } + else + { + PR_ASSERT(pt_continuation_done != op->status); + op->status = pt_continuation_inprogress; + if (op->event & PR_POLL_READ) { + FD_SET(op->arg1.osfd, &readSet); + } + if (op->event & PR_POLL_WRITE) { + FD_SET(op->arg1.osfd, &writeSet); + } + if (op->event & PR_POLL_EXCEPT) { + FD_SET(op->arg1.osfd, &exceptSet); + } + pollingList[pollingListUsed] = op->arg1.osfd; + pollingListUsed += 1; + if (pollingListUsed == pollingSlotsAllocated) { + break; + } + op = op->next; + } + } + + PR_Unlock(pt_tq.ml); + + /* + * If 'op' isn't NULL at this point, then we didn't get to + * the end of the list. That means that more items got added + * to the list than we anticipated. So, forget this iteration, + * go around the horn again. + * One would hope this doesn't happen all that often. + */ + if (NULL != op) + { +#if defined(DEBUG) + pt_debug.predictionsFoiled += 1; /* keep track */ +#endif + continue; /* make it rethink things */ + } + + /* there's a chance that all ops got blown away */ + if (NULL == pt_tq.head) { + continue; + } + /* if not, we know this is the shortest timeout */ + timeout = pt_tq.head->timeout; + + /* + * We don't want to wait forever on this poll. So keep + * the interval down. The operations, if they are timed, + * still have to timeout, while those that are not timed + * should persist forever. But they may be aborted. That's + * what this anxiety is all about. + */ + if (timeout > mx_select_ticks) { + timeout = mx_select_ticks; + } + + if (PR_INTERVAL_NO_TIMEOUT != pt_tq.head->timeout) { + pt_tq.head->timeout -= timeout; + } + tv.tv_sec = PR_IntervalToSeconds(timeout); + tv.tv_usec = PR_IntervalToMicroseconds(timeout) % PR_USEC_PER_SEC; + + rv = select(0, &readSet, &writeSet, &exceptSet, &tv); + + if (0 == rv) /* poll timed out - what about leading op? */ + { + if (0 == pt_tq.head->timeout) + { + /* + * The leading element of the timed queue has timed + * out. Get rid of it. In any case go around the + * loop again, computing the polling list, checking + * for interrupted operations. + */ + PR_Lock(pt_tq.ml); + do + { + pt_tq.head->result.code = -1; + pt_tq.head->syserrno = WSAETIMEDOUT; + op = pt_FinishTimedInternal(pt_tq.head); + } while ((NULL != op) && (0 == op->timeout)); + PR_Unlock(pt_tq.ml); + } + continue; + } + + if (-1 == rv && (WSAGetLastError() == WSAEINTR + || WSAGetLastError() == WSAEINPROGRESS)) + { + continue; /* go around the loop again */ + } + + /* + * select() says that something in our list is ready for some more + * action or is an invalid fd. Find it, load up the operation and + * see what happens. + */ + + PR_ASSERT(rv > 0 || WSAGetLastError() == WSAENOTSOCK); + + + /* + * $$$ There's a problem here. I'm running the operations list + * and I'm not holding any locks. I don't want to hold the lock + * and do the operation, so this is really messed up.. + * + * This may work out okay. The rule is that only this thread, + * the continuation thread, can remove elements from the list. + * Therefore, the list is at worst, longer than when we built + * the polling list. + */ + op = pt_tq.head; + for (pollIndex = 0; pollIndex < pollingListUsed; ++pollIndex) + { + PRInt16 revents = 0; + + PR_ASSERT(NULL != op); + + /* + * This one wants attention. Redo the operation. + * We know that there can only be more elements + * in the op list than we knew about when we created + * the poll list. Therefore, we might have to skip + * a few ops to find the right one to operation on. + */ + while (pollingList[pollIndex] != op->arg1.osfd ) + { + op = op->next; + PR_ASSERT(NULL != op); + } + + if (FD_ISSET(op->arg1.osfd, &readSet)) { + revents |= PR_POLL_READ; + } + if (FD_ISSET(op->arg1.osfd, &writeSet)) { + revents |= PR_POLL_WRITE; + } + if (FD_ISSET(op->arg1.osfd, &exceptSet)) { + revents |= PR_POLL_EXCEPT; + } + + /* + * Sip over all those not in progress. They'll be + * pruned next time we build a polling list. Call + * the continuation function. If it reports completion, + * finish off the operation. + */ + if (revents && (pt_continuation_inprogress == op->status) + && (op->function(op, revents))) + { + PR_Lock(pt_tq.ml); + op = pt_FinishTimedInternal(op); + PR_Unlock(pt_tq.ml); + } + } + } + if (NULL != pollingList) { + PR_DELETE(pollingList); + } +} /* ContinuationThread */ + +static int pt_Continue(pt_Continuation *op) +{ + PRStatus rv; + /* Finish filling in the blank slots */ + op->status = pt_continuation_sumbitted; + op->complete = PR_NewCondVar(pt_tq.ml); + + PR_Lock(pt_tq.ml); /* we provide the locking */ + + pt_InsertTimedInternal(op); /* insert in the structure */ + + PR_NotifyCondVar(pt_tq.new_op); /* notify the continuation thread */ + + while (pt_continuation_done != op->status) /* wait for completion */ + { + rv = PR_WaitCondVar(op->complete, PR_INTERVAL_NO_TIMEOUT); + /* + * If we get interrupted, we set state the continuation thread will + * see and allow it to finish the I/O operation w/ error. That way + * the rule that only the continuation thread is removing elements + * from the list is still valid. + * + * Don't call interrupt on the continuation thread. That'll just + * piss him off. He's cycling around at least every mx_select_ticks + * anyhow and should notice the request in there. + */ + if ((PR_FAILURE == rv) + && (PR_PENDING_INTERRUPT_ERROR == PR_GetError())) { + op->status = pt_continuation_abort; /* our status */ + } + } + + PR_Unlock(pt_tq.ml); /* we provide the locking */ + + PR_DestroyCondVar(op->complete); + + return op->result.code; /* and the primary answer */ +} /* pt_Continue */ + +static PRBool pt_sendto_cont(pt_Continuation *op, PRInt16 revents) +{ + PRIntn bytes = sendto( + op->arg1.osfd, op->arg2.buffer, op->arg3.amount, op->arg4.flags, + (struct sockaddr*)op->arg5.addr, sizeof(*(op->arg5.addr))); + op->syserrno = WSAGetLastError(); + if (bytes > 0) /* this is progress */ + { + char *bp = op->arg2.buffer; + bp += bytes; /* adjust the buffer pointer */ + op->arg2.buffer = bp; + op->result.code += bytes; /* accumulate the number sent */ + op->arg3.amount -= bytes; /* and reduce the required count */ + return (0 == op->arg3.amount) ? PR_TRUE : PR_FALSE; + } + else return ((-1 == bytes) && (WSAEWOULDBLOCK == op->syserrno)) ? + PR_FALSE : PR_TRUE; +} /* pt_sendto_cont */ + +static PRBool pt_recvfrom_cont(pt_Continuation *op, PRInt16 revents) +{ + PRIntn addr_len = sizeof(*(op->arg5.addr)); + op->result.code = recvfrom( + op->arg1.osfd, op->arg2.buffer, op->arg3.amount, + op->arg4.flags, (struct sockaddr*)op->arg5.addr, &addr_len); + op->syserrno = WSAGetLastError(); + return ((-1 == op->result.code) && (WSAEWOULDBLOCK == op->syserrno)) ? + PR_FALSE : PR_TRUE; +} /* pt_recvfrom_cont */ + +static PRInt32 pt_SendTo( + SOCKET osfd, const void *buf, + PRInt32 amount, PRInt32 flags, const PRNetAddr *addr, + PRIntn addrlen, PRIntervalTime timeout) +{ + PRInt32 bytes = -1, err; + PRBool fNeedContinue = PR_FALSE; + + bytes = sendto( + osfd, buf, amount, flags, + (struct sockaddr*)addr, PR_NETADDR_SIZE(addr)); + if (bytes == -1) { + if ((err = WSAGetLastError()) == WSAEWOULDBLOCK) { + fNeedContinue = PR_TRUE; + } + else { + _PR_MD_MAP_SENDTO_ERROR(err); + } + } + if (fNeedContinue == PR_TRUE) + { + pt_Continuation op; + op.arg1.osfd = osfd; + op.arg2.buffer = (void*)buf; + op.arg3.amount = amount; + op.arg4.flags = flags; + op.arg5.addr = (PRNetAddr*)addr; + op.timeout = timeout; + op.result.code = 0; /* initialize the number sent */ + op.function = pt_sendto_cont; + op.event = PR_POLL_WRITE | PR_POLL_EXCEPT; + bytes = pt_Continue(&op); + if (bytes < 0) { + WSASetLastError(op.syserrno); + _PR_MD_MAP_SENDTO_ERROR(op.syserrno); + } + } + return bytes; +} /* pt_SendTo */ + +static PRInt32 pt_RecvFrom(SOCKET osfd, void *buf, PRInt32 amount, + PRInt32 flags, PRNetAddr *addr, PRIntn *addr_len, PRIntervalTime timeout) +{ + PRInt32 bytes = -1, err; + PRBool fNeedContinue = PR_FALSE; + + bytes = recvfrom( + osfd, buf, amount, flags, + (struct sockaddr*)addr, addr_len); + if (bytes == -1) { + if ((err = WSAGetLastError()) == WSAEWOULDBLOCK) { + fNeedContinue = PR_TRUE; + } + else { + _PR_MD_MAP_RECVFROM_ERROR(err); + } + } + + if (fNeedContinue == PR_TRUE) + { + pt_Continuation op; + op.arg1.osfd = osfd; + op.arg2.buffer = buf; + op.arg3.amount = amount; + op.arg4.flags = flags; + op.arg5.addr = addr; + op.timeout = timeout; + op.function = pt_recvfrom_cont; + op.event = PR_POLL_READ | PR_POLL_EXCEPT; + bytes = pt_Continue(&op); + if (bytes < 0) { + WSASetLastError(op.syserrno); + _PR_MD_MAP_RECVFROM_ERROR(op.syserrno); + } + } + return bytes; +} /* pt_RecvFrom */ |