diff options
author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
commit | 36d22d82aa202bb199967e9512281e9a53db42c9 (patch) | |
tree | 105e8c98ddea1c1e4784a60a5a6410fa416be2de /nsprpub/pr/src/misc/prinit.c | |
parent | Initial commit. (diff) | |
download | firefox-esr-upstream.tar.xz firefox-esr-upstream.zip |
Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'nsprpub/pr/src/misc/prinit.c')
-rw-r--r-- | nsprpub/pr/src/misc/prinit.c | 857 |
1 files changed, 857 insertions, 0 deletions
diff --git a/nsprpub/pr/src/misc/prinit.c b/nsprpub/pr/src/misc/prinit.c new file mode 100644 index 0000000000..a952ad6554 --- /dev/null +++ b/nsprpub/pr/src/misc/prinit.c @@ -0,0 +1,857 @@ +/* -*- 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/. */ + +#include "primpl.h" +#include <ctype.h> +#include <string.h> + +PRLogModuleInfo *_pr_clock_lm; +PRLogModuleInfo *_pr_cmon_lm; +PRLogModuleInfo *_pr_io_lm; +PRLogModuleInfo *_pr_cvar_lm; +PRLogModuleInfo *_pr_mon_lm; +PRLogModuleInfo *_pr_linker_lm; +PRLogModuleInfo *_pr_sched_lm; +PRLogModuleInfo *_pr_thread_lm; +PRLogModuleInfo *_pr_gc_lm; +PRLogModuleInfo *_pr_shm_lm; +PRLogModuleInfo *_pr_shma_lm; + +PRFileDesc *_pr_stdin; +PRFileDesc *_pr_stdout; +PRFileDesc *_pr_stderr; + +#if !defined(_PR_PTHREADS) && !defined(_PR_BTHREADS) + +PRCList _pr_active_local_threadQ = + PR_INIT_STATIC_CLIST(&_pr_active_local_threadQ); +PRCList _pr_active_global_threadQ = + PR_INIT_STATIC_CLIST(&_pr_active_global_threadQ); + +_MDLock _pr_cpuLock; /* lock for the CPU Q */ +PRCList _pr_cpuQ = PR_INIT_STATIC_CLIST(&_pr_cpuQ); + +PRUint32 _pr_utid; + +PRInt32 _pr_userActive; +PRInt32 _pr_systemActive; +PRUintn _pr_maxPTDs; + +#ifdef _PR_LOCAL_THREADS_ONLY + +struct _PRCPU *_pr_currentCPU; +PRThread *_pr_currentThread; +PRThread *_pr_lastThread; +PRInt32 _pr_intsOff; + +#endif /* _PR_LOCAL_THREADS_ONLY */ + +/* Lock protecting all "termination" condition variables of all threads */ +PRLock *_pr_terminationCVLock; + +#endif /* !defined(_PR_PTHREADS) */ + +PRLock *_pr_sleeplock; /* used in PR_Sleep(), classic and pthreads */ + +static void _PR_InitCallOnce(void); + +PRBool _pr_initialized = PR_FALSE; + + +PR_IMPLEMENT(PRBool) PR_VersionCheck(const char *importedVersion) +{ + /* + ** This is the secret handshake algorithm. + ** + ** This release has a simple version compatibility + ** check algorithm. This release is not backward + ** compatible with previous major releases. It is + ** not compatible with future major, minor, or + ** patch releases. + */ + int vmajor = 0, vminor = 0, vpatch = 0; + const char *ptr = importedVersion; + + while (isdigit(*ptr)) { + vmajor = 10 * vmajor + *ptr - '0'; + ptr++; + } + if (*ptr == '.') { + ptr++; + while (isdigit(*ptr)) { + vminor = 10 * vminor + *ptr - '0'; + ptr++; + } + if (*ptr == '.') { + ptr++; + while (isdigit(*ptr)) { + vpatch = 10 * vpatch + *ptr - '0'; + ptr++; + } + } + } + + if (vmajor != PR_VMAJOR) { + return PR_FALSE; + } + if (vmajor == PR_VMAJOR && vminor > PR_VMINOR) { + return PR_FALSE; + } + if (vmajor == PR_VMAJOR && vminor == PR_VMINOR && vpatch > PR_VPATCH) { + return PR_FALSE; + } + return PR_TRUE; +} /* PR_VersionCheck */ + +PR_IMPLEMENT(const char*) PR_GetVersion(void) +{ + return PR_VERSION; +} + +PR_IMPLEMENT(PRBool) PR_Initialized(void) +{ + return _pr_initialized; +} + +PRInt32 _native_threads_only = 0; + +#ifdef WINNT +static void _pr_SetNativeThreadsOnlyMode(void) +{ + HMODULE mainExe; + PRBool *globalp; + char *envp; + + mainExe = GetModuleHandle(NULL); + PR_ASSERT(NULL != mainExe); + globalp = (PRBool *) GetProcAddress(mainExe, "nspr_native_threads_only"); + if (globalp) { + _native_threads_only = (*globalp != PR_FALSE); + } else if (envp = getenv("NSPR_NATIVE_THREADS_ONLY")) { + _native_threads_only = (atoi(envp) == 1); + } +} +#endif + +static void _PR_InitStuff(void) +{ + + if (_pr_initialized) { + return; + } + _pr_initialized = PR_TRUE; +#ifdef _PR_ZONE_ALLOCATOR + _PR_InitZones(); +#endif +#ifdef WINNT + _pr_SetNativeThreadsOnlyMode(); +#endif + + + (void) PR_GetPageSize(); + + _pr_clock_lm = PR_NewLogModule("clock"); + _pr_cmon_lm = PR_NewLogModule("cmon"); + _pr_io_lm = PR_NewLogModule("io"); + _pr_mon_lm = PR_NewLogModule("mon"); + _pr_linker_lm = PR_NewLogModule("linker"); + _pr_cvar_lm = PR_NewLogModule("cvar"); + _pr_sched_lm = PR_NewLogModule("sched"); + _pr_thread_lm = PR_NewLogModule("thread"); + _pr_gc_lm = PR_NewLogModule("gc"); + _pr_shm_lm = PR_NewLogModule("shm"); + _pr_shma_lm = PR_NewLogModule("shma"); + + /* NOTE: These init's cannot depend on _PR_MD_CURRENT_THREAD() */ + _PR_MD_EARLY_INIT(); + + _PR_InitLocks(); + _PR_InitAtomic(); + _PR_InitSegs(); + _PR_InitStacks(); + _PR_InitTPD(); + _PR_InitEnv(); + _PR_InitLayerCache(); + _PR_InitClock(); + + _pr_sleeplock = PR_NewLock(); + PR_ASSERT(NULL != _pr_sleeplock); + + _PR_InitThreads(PR_USER_THREAD, PR_PRIORITY_NORMAL, 0); + +#ifdef WIN16 + { + PRInt32 top; /* artificial top of stack, win16 */ + _pr_top_of_task_stack = (char *) ⊤ + } +#endif + +#ifndef _PR_GLOBAL_THREADS_ONLY + _PR_InitCPUs(); +#endif + + /* + * XXX: call _PR_InitMem only on those platforms for which nspr implements + * malloc, for now. + */ +#ifdef _PR_OVERRIDE_MALLOC + _PR_InitMem(); +#endif + + _PR_InitCMon(); + _PR_InitIO(); + _PR_InitNet(); + _PR_InitTime(); + _PR_InitLog(); + _PR_InitLinker(); + _PR_InitCallOnce(); + _PR_InitDtoa(); + _PR_InitMW(); + _PR_InitRWLocks(); + + nspr_InitializePRErrorTable(); + + _PR_MD_FINAL_INIT(); +} + +void _PR_ImplicitInitialization(void) +{ + _PR_InitStuff(); + + /* Enable interrupts */ +#if !defined(_PR_PTHREADS) && !defined(_PR_GLOBAL_THREADS_ONLY) + _PR_MD_START_INTERRUPTS(); +#endif + +} + +PR_IMPLEMENT(void) PR_DisableClockInterrupts(void) +{ +#if !defined(_PR_PTHREADS) && !defined(_PR_BTHREADS) + if (!_pr_initialized) { + _PR_InitStuff(); + } else { + _PR_MD_DISABLE_CLOCK_INTERRUPTS(); + } +#endif +} + +PR_IMPLEMENT(void) PR_EnableClockInterrupts(void) +{ +#if !defined(_PR_PTHREADS) && !defined(_PR_BTHREADS) + if (!_pr_initialized) { + _PR_InitStuff(); + } + _PR_MD_ENABLE_CLOCK_INTERRUPTS(); +#endif +} + +PR_IMPLEMENT(void) PR_BlockClockInterrupts(void) +{ +#if !defined(_PR_PTHREADS) && !defined(_PR_BTHREADS) + _PR_MD_BLOCK_CLOCK_INTERRUPTS(); +#endif +} + +PR_IMPLEMENT(void) PR_UnblockClockInterrupts(void) +{ +#if !defined(_PR_PTHREADS) && !defined(_PR_BTHREADS) + _PR_MD_UNBLOCK_CLOCK_INTERRUPTS(); +#endif +} + +PR_IMPLEMENT(void) PR_Init( + PRThreadType type, PRThreadPriority priority, PRUintn maxPTDs) +{ + _PR_ImplicitInitialization(); +} + +PR_IMPLEMENT(PRIntn) PR_Initialize( + PRPrimordialFn prmain, PRIntn argc, char **argv, PRUintn maxPTDs) +{ + PRIntn rv; + _PR_ImplicitInitialization(); + rv = prmain(argc, argv); + PR_Cleanup(); + return rv; +} /* PR_Initialize */ + +/* + *----------------------------------------------------------------------- + * + * _PR_CleanupBeforeExit -- + * + * Perform the cleanup work before exiting the process. + * We first do the cleanup generic to all platforms. Then + * we call _PR_MD_CLEANUP_BEFORE_EXIT(), where platform-dependent + * cleanup is done. This function is used by PR_Cleanup(). + * + * See also: PR_Cleanup(). + * + *----------------------------------------------------------------------- + */ +#if defined(_PR_PTHREADS) || defined(_PR_BTHREADS) +/* see ptthread.c */ +#else +static void +_PR_CleanupBeforeExit(void) +{ + /* + Do not make any calls here other than to destroy resources. For example, + do not make any calls that eventually may end up in PR_Lock. Because the + thread is destroyed, can not access current thread any more. + */ + _PR_CleanupTPD(); + if (_pr_terminationCVLock) + /* + * In light of the comment above, this looks real suspicious. + * I'd go so far as to say it's just a problem waiting to happen. + */ + { + PR_DestroyLock(_pr_terminationCVLock); + } + + _PR_MD_CLEANUP_BEFORE_EXIT(); +} +#endif /* defined(_PR_PTHREADS) */ + +/* + *---------------------------------------------------------------------- + * + * PR_Cleanup -- + * + * Perform a graceful shutdown of the NSPR runtime. PR_Cleanup() may + * only be called from the primordial thread, typically at the + * end of the main() function. It returns when it has completed + * its platform-dependent duty and the process must not make any other + * NSPR library calls prior to exiting from main(). + * + * PR_Cleanup() first blocks the primordial thread until all the + * other user (non-system) threads, if any, have terminated. + * Then it performs cleanup in preparation for exiting the process. + * PR_Cleanup() does not exit the primordial thread (which would + * in turn exit the process). + * + * PR_Cleanup() only responds when it is called by the primordial + * thread. Calls by any other thread are silently ignored. + * + * See also: PR_ExitProcess() + * + *---------------------------------------------------------------------- + */ +#if defined(_PR_PTHREADS) || defined(_PR_BTHREADS) +/* see ptthread.c */ +#else + +PR_IMPLEMENT(PRStatus) PR_Cleanup() +{ + PRThread *me = PR_GetCurrentThread(); + PR_ASSERT((NULL != me) && (me->flags & _PR_PRIMORDIAL)); + if ((NULL != me) && (me->flags & _PR_PRIMORDIAL)) + { + PR_LOG(_pr_thread_lm, PR_LOG_MIN, ("PR_Cleanup: shutting down NSPR")); + + /* + * No more recycling of threads + */ + _pr_recycleThreads = 0; + + /* + * Wait for all other user (non-system/daemon) threads + * to terminate. + */ + PR_Lock(_pr_activeLock); + while (_pr_userActive > _pr_primordialExitCount) { + PR_WaitCondVar(_pr_primordialExitCVar, PR_INTERVAL_NO_TIMEOUT); + } + if (me->flags & _PR_SYSTEM) { + _pr_systemActive--; + } else { + _pr_userActive--; + } + PR_Unlock(_pr_activeLock); + + _PR_MD_EARLY_CLEANUP(); + + _PR_CleanupMW(); + _PR_CleanupTime(); + _PR_CleanupDtoa(); + _PR_CleanupCallOnce(); + _PR_ShutdownLinker(); + _PR_CleanupNet(); + _PR_CleanupIO(); + /* Release the primordial thread's private data, etc. */ + _PR_CleanupThread(me); + + _PR_MD_STOP_INTERRUPTS(); + + PR_LOG(_pr_thread_lm, PR_LOG_MIN, + ("PR_Cleanup: clean up before destroying thread")); + _PR_LogCleanup(); + + /* + * This part should look like the end of _PR_NativeRunThread + * and _PR_UserRunThread. + */ + if (_PR_IS_NATIVE_THREAD(me)) { + _PR_MD_EXIT_THREAD(me); + _PR_NativeDestroyThread(me); + } else { + _PR_UserDestroyThread(me); + PR_DELETE(me->stack); + PR_DELETE(me); + } + + /* + * XXX: We are freeing the heap memory here so that Purify won't + * complain, but we should also free other kinds of resources + * that are allocated by the _PR_InitXXX() functions. + * Ideally, for each _PR_InitXXX(), there should be a corresponding + * _PR_XXXCleanup() that we can call here. + */ +#ifdef WINNT + _PR_CleanupCPUs(); +#endif + _PR_CleanupThreads(); + _PR_CleanupCMon(); + PR_DestroyLock(_pr_sleeplock); + _pr_sleeplock = NULL; + _PR_CleanupLayerCache(); + _PR_CleanupEnv(); + _PR_CleanupStacks(); + _PR_CleanupBeforeExit(); + _pr_initialized = PR_FALSE; + return PR_SUCCESS; + } + return PR_FAILURE; +} +#endif /* defined(_PR_PTHREADS) */ + +/* + *------------------------------------------------------------------------ + * PR_ProcessExit -- + * + * Cause an immediate, nongraceful, forced termination of the process. + * It takes a PRIntn argument, which is the exit status code of the + * process. + * + * See also: PR_Cleanup() + * + *------------------------------------------------------------------------ + */ + +#if defined(_PR_PTHREADS) || defined(_PR_BTHREADS) +/* see ptthread.c */ +#else +PR_IMPLEMENT(void) PR_ProcessExit(PRIntn status) +{ + _PR_MD_EXIT(status); +} + +#endif /* defined(_PR_PTHREADS) */ + +PR_IMPLEMENT(PRProcessAttr *) +PR_NewProcessAttr(void) +{ + PRProcessAttr *attr; + + attr = PR_NEWZAP(PRProcessAttr); + if (!attr) { + PR_SetError(PR_OUT_OF_MEMORY_ERROR, 0); + } + return attr; +} + +PR_IMPLEMENT(void) +PR_ResetProcessAttr(PRProcessAttr *attr) +{ + PR_FREEIF(attr->currentDirectory); + PR_FREEIF(attr->fdInheritBuffer); + memset(attr, 0, sizeof(*attr)); +} + +PR_IMPLEMENT(void) +PR_DestroyProcessAttr(PRProcessAttr *attr) +{ + PR_FREEIF(attr->currentDirectory); + PR_FREEIF(attr->fdInheritBuffer); + PR_DELETE(attr); +} + +PR_IMPLEMENT(void) +PR_ProcessAttrSetStdioRedirect( + PRProcessAttr *attr, + PRSpecialFD stdioFd, + PRFileDesc *redirectFd) +{ + switch (stdioFd) { + case PR_StandardInput: + attr->stdinFd = redirectFd; + break; + case PR_StandardOutput: + attr->stdoutFd = redirectFd; + break; + case PR_StandardError: + attr->stderrFd = redirectFd; + break; + default: + PR_ASSERT(0); + } +} + +/* + * OBSOLETE + */ +PR_IMPLEMENT(void) +PR_SetStdioRedirect( + PRProcessAttr *attr, + PRSpecialFD stdioFd, + PRFileDesc *redirectFd) +{ +#if defined(DEBUG) + static PRBool warn = PR_TRUE; + if (warn) { + warn = _PR_Obsolete("PR_SetStdioRedirect()", + "PR_ProcessAttrSetStdioRedirect()"); + } +#endif + PR_ProcessAttrSetStdioRedirect(attr, stdioFd, redirectFd); +} + +PR_IMPLEMENT(PRStatus) +PR_ProcessAttrSetCurrentDirectory( + PRProcessAttr *attr, + const char *dir) +{ + PR_FREEIF(attr->currentDirectory); + attr->currentDirectory = (char *) PR_MALLOC(strlen(dir) + 1); + if (!attr->currentDirectory) { + PR_SetError(PR_OUT_OF_MEMORY_ERROR, 0); + return PR_FAILURE; + } + strcpy(attr->currentDirectory, dir); + return PR_SUCCESS; +} + +PR_IMPLEMENT(PRStatus) +PR_ProcessAttrSetInheritableFD( + PRProcessAttr *attr, + PRFileDesc *fd, + const char *name) +{ + /* We malloc the fd inherit buffer in multiples of this number. */ +#define FD_INHERIT_BUFFER_INCR 128 + /* The length of "NSPR_INHERIT_FDS=" */ +#define NSPR_INHERIT_FDS_STRLEN 17 + /* The length of osfd (PROsfd) printed in hexadecimal with 0x prefix */ +#ifdef _WIN64 +#define OSFD_STRLEN 18 +#else +#define OSFD_STRLEN 10 +#endif + /* The length of fd type (PRDescType) printed in decimal */ +#define FD_TYPE_STRLEN 1 + PRSize newSize; + int remainder; + char *newBuffer; + int nwritten; + char *cur; + int freeSize; + + if (fd->identity != PR_NSPR_IO_LAYER) { + PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0); + return PR_FAILURE; + } + if (fd->secret->inheritable == _PR_TRI_UNKNOWN) { + _PR_MD_QUERY_FD_INHERITABLE(fd); + } + if (fd->secret->inheritable != _PR_TRI_TRUE) { + PR_SetError(PR_NO_ACCESS_RIGHTS_ERROR, 0); + return PR_FAILURE; + } + + /* + * We also need to account for the : separators and the + * terminating null byte. + */ + if (NULL == attr->fdInheritBuffer) { + /* The first time, we print "NSPR_INHERIT_FDS=<name>:<type>:<val>" */ + newSize = NSPR_INHERIT_FDS_STRLEN + strlen(name) + + FD_TYPE_STRLEN + OSFD_STRLEN + 2 + 1; + } else { + /* At other times, we print ":<name>:<type>:<val>" */ + newSize = attr->fdInheritBufferUsed + strlen(name) + + FD_TYPE_STRLEN + OSFD_STRLEN + 3 + 1; + } + if (newSize > attr->fdInheritBufferSize) { + /* Make newSize a multiple of FD_INHERIT_BUFFER_INCR */ + remainder = newSize % FD_INHERIT_BUFFER_INCR; + if (remainder != 0) { + newSize += (FD_INHERIT_BUFFER_INCR - remainder); + } + if (NULL == attr->fdInheritBuffer) { + newBuffer = (char *) PR_MALLOC(newSize); + } else { + newBuffer = (char *) PR_REALLOC(attr->fdInheritBuffer, newSize); + } + if (NULL == newBuffer) { + PR_SetError(PR_OUT_OF_MEMORY_ERROR, 0); + return PR_FAILURE; + } + attr->fdInheritBuffer = newBuffer; + attr->fdInheritBufferSize = newSize; + } + cur = attr->fdInheritBuffer + attr->fdInheritBufferUsed; + freeSize = attr->fdInheritBufferSize - attr->fdInheritBufferUsed; + if (0 == attr->fdInheritBufferUsed) { + nwritten = PR_snprintf(cur, freeSize, + "NSPR_INHERIT_FDS=%s:%d:0x%" PR_PRIxOSFD, + name, (PRIntn)fd->methods->file_type, fd->secret->md.osfd); + } else { + nwritten = PR_snprintf(cur, freeSize, ":%s:%d:0x%" PR_PRIxOSFD, + name, (PRIntn)fd->methods->file_type, fd->secret->md.osfd); + } + attr->fdInheritBufferUsed += nwritten; + return PR_SUCCESS; +} + +PR_IMPLEMENT(PRFileDesc *) PR_GetInheritedFD( + const char *name) +{ + PRFileDesc *fd; + const char *envVar; + const char *ptr; + int len = strlen(name); + PROsfd osfd; + int nColons; + PRIntn fileType; + + envVar = PR_GetEnv("NSPR_INHERIT_FDS"); + if (NULL == envVar || '\0' == envVar[0]) { + PR_SetError(PR_UNKNOWN_ERROR, 0); + return NULL; + } + + ptr = envVar; + while (1) { + if ((ptr[len] == ':') && (strncmp(ptr, name, len) == 0)) { + ptr += len + 1; + if (PR_sscanf(ptr, "%d:0x%" PR_SCNxOSFD, &fileType, &osfd) != 2) { + PR_SetError(PR_UNKNOWN_ERROR, 0); + return NULL; + } + switch ((PRDescType)fileType) { + case PR_DESC_FILE: + fd = PR_ImportFile(osfd); + break; + case PR_DESC_PIPE: + fd = PR_ImportPipe(osfd); + break; + case PR_DESC_SOCKET_TCP: + fd = PR_ImportTCPSocket(osfd); + break; + case PR_DESC_SOCKET_UDP: + fd = PR_ImportUDPSocket(osfd); + break; + default: + PR_ASSERT(0); + PR_SetError(PR_UNKNOWN_ERROR, 0); + fd = NULL; + break; + } + if (fd) { + /* + * An inherited FD is inheritable by default. + * The child process needs to call PR_SetFDInheritable + * to make it non-inheritable if so desired. + */ + fd->secret->inheritable = _PR_TRI_TRUE; + } + return fd; + } + /* Skip three colons */ + nColons = 0; + while (*ptr) { + if (*ptr == ':') { + if (++nColons == 3) { + break; + } + } + ptr++; + } + if (*ptr == '\0') { + PR_SetError(PR_UNKNOWN_ERROR, 0); + return NULL; + } + ptr++; + } +} + +PR_IMPLEMENT(PRProcess*) PR_CreateProcess( + const char *path, + char *const *argv, + char *const *envp, + const PRProcessAttr *attr) +{ + return _PR_MD_CREATE_PROCESS(path, argv, envp, attr); +} /* PR_CreateProcess */ + +PR_IMPLEMENT(PRStatus) PR_CreateProcessDetached( + const char *path, + char *const *argv, + char *const *envp, + const PRProcessAttr *attr) +{ + PRProcess *process; + PRStatus rv; + + process = PR_CreateProcess(path, argv, envp, attr); + if (NULL == process) { + return PR_FAILURE; + } + rv = PR_DetachProcess(process); + PR_ASSERT(PR_SUCCESS == rv); + if (rv == PR_FAILURE) { + PR_DELETE(process); + return PR_FAILURE; + } + return PR_SUCCESS; +} + +PR_IMPLEMENT(PRStatus) PR_DetachProcess(PRProcess *process) +{ + return _PR_MD_DETACH_PROCESS(process); +} + +PR_IMPLEMENT(PRStatus) PR_WaitProcess(PRProcess *process, PRInt32 *exitCode) +{ + return _PR_MD_WAIT_PROCESS(process, exitCode); +} /* PR_WaitProcess */ + +PR_IMPLEMENT(PRStatus) PR_KillProcess(PRProcess *process) +{ + return _PR_MD_KILL_PROCESS(process); +} + +/* + ******************************************************************** + * + * Module initialization + * + ******************************************************************** + */ + +static struct { + PRLock *ml; + PRCondVar *cv; +} mod_init; + +static void _PR_InitCallOnce(void) { + mod_init.ml = PR_NewLock(); + PR_ASSERT(NULL != mod_init.ml); + mod_init.cv = PR_NewCondVar(mod_init.ml); + PR_ASSERT(NULL != mod_init.cv); +} + +void _PR_CleanupCallOnce() +{ + PR_DestroyLock(mod_init.ml); + mod_init.ml = NULL; + PR_DestroyCondVar(mod_init.cv); + mod_init.cv = NULL; +} + +PR_IMPLEMENT(PRStatus) PR_CallOnce( + PRCallOnceType *once, + PRCallOnceFN func) +{ + if (!_pr_initialized) { + _PR_ImplicitInitialization(); + } + + PR_Lock(mod_init.ml); + PRIntn initialized = once->initialized; + PRStatus status = once->status; + PR_Unlock(mod_init.ml); + if (!initialized) { + if (PR_ATOMIC_SET(&once->inProgress, 1) == 0) { + status = (*func)(); + PR_Lock(mod_init.ml); + once->status = status; + once->initialized = 1; + PR_NotifyAllCondVar(mod_init.cv); + PR_Unlock(mod_init.ml); + } else { + PR_Lock(mod_init.ml); + while (!once->initialized) { + PR_WaitCondVar(mod_init.cv, PR_INTERVAL_NO_TIMEOUT); + } + status = once->status; + PR_Unlock(mod_init.ml); + if (PR_SUCCESS != status) { + PR_SetError(PR_CALL_ONCE_ERROR, 0); + } + } + return status; + } + if (PR_SUCCESS != status) { + PR_SetError(PR_CALL_ONCE_ERROR, 0); + } + return status; +} + +PR_IMPLEMENT(PRStatus) PR_CallOnceWithArg( + PRCallOnceType *once, + PRCallOnceWithArgFN func, + void *arg) +{ + if (!_pr_initialized) { + _PR_ImplicitInitialization(); + } + + PR_Lock(mod_init.ml); + PRIntn initialized = once->initialized; + PRStatus status = once->status; + PR_Unlock(mod_init.ml); + if (!initialized) { + if (PR_ATOMIC_SET(&once->inProgress, 1) == 0) { + status = (*func)(arg); + PR_Lock(mod_init.ml); + once->status = status; + once->initialized = 1; + PR_NotifyAllCondVar(mod_init.cv); + PR_Unlock(mod_init.ml); + } else { + PR_Lock(mod_init.ml); + while (!once->initialized) { + PR_WaitCondVar(mod_init.cv, PR_INTERVAL_NO_TIMEOUT); + } + status = once->status; + PR_Unlock(mod_init.ml); + if (PR_SUCCESS != status) { + PR_SetError(PR_CALL_ONCE_ERROR, 0); + } + } + return status; + } + if (PR_SUCCESS != status) { + PR_SetError(PR_CALL_ONCE_ERROR, 0); + } + return status; +} + +PRBool _PR_Obsolete(const char *obsolete, const char *preferred) +{ +#if defined(DEBUG) + PR_fprintf( + PR_STDERR, "'%s' is obsolete. Use '%s' instead.\n", + obsolete, (NULL == preferred) ? "something else" : preferred); +#endif + return PR_FALSE; +} /* _PR_Obsolete */ + +/* prinit.c */ + + |