Adding upstream version 86.0.1.upstream/86.0.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

6 files changed, 2850 insertions, 0 deletions

diff --git a/nsprpub/pr/include/private/Makefile.in b/nsprpub/pr/include/private/Makefile.in
new file mode 100644
index 0000000000..db0c2f1e24
--- /dev/null
+++ b/nsprpub/pr/include/private/Makefile.in
@@ -0,0 +1,29 @@
+# 
+# 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/.
+
+
+#! gmake
+
+MOD_DEPTH	= ../../..
+topsrcdir	= @top_srcdir@
+srcdir		= @srcdir@
+VPATH		= @srcdir@
+
+include $(MOD_DEPTH)/config/autoconf.mk
+
+include $(topsrcdir)/config/config.mk
+
+RELEASE_HEADERS = pprio.h pprthred.h prpriv.h
+RELEASE_HEADERS := $(addprefix $(srcdir)/, $(RELEASE_HEADERS))
+RELEASE_HEADERS_DEST = $(RELEASE_INCLUDE_DIR)/private
+
+HEADERS = $(RELEASE_HEADERS) $(srcdir)/pprmwait.h $(srcdir)/primpl.h
+
+include_subdir = private
+
+include $(topsrcdir)/config/rules.mk
+
+export:: $(RELEASE_HEADERS)
+	$(INSTALL) -m 444 $(RELEASE_HEADERS) $(dist_includedir)/private
diff --git a/nsprpub/pr/include/private/pprio.h b/nsprpub/pr/include/private/pprio.h
new file mode 100644
index 0000000000..be8252b887
--- /dev/null
+++ b/nsprpub/pr/include/private/pprio.h
@@ -0,0 +1,242 @@
+/* -*- 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/. */
+
+/*
+** File:    pprio.h
+**
+** Description: Private definitions for I/O related structures
+*/
+
+#ifndef pprio_h___
+#define pprio_h___
+
+#include "prtypes.h"
+#include "prio.h"
+
+PR_BEGIN_EXTERN_C
+
+/************************************************************************/
+/************************************************************************/
+
+#ifdef _WIN64
+typedef __int64 PROsfd;
+#else
+typedef PRInt32 PROsfd;
+#endif
+
+/* Return the method tables for files, tcp sockets and udp sockets */
+NSPR_API(const PRIOMethods*)    PR_GetFileMethods(void);
+NSPR_API(const PRIOMethods*)    PR_GetTCPMethods(void);
+NSPR_API(const PRIOMethods*)    PR_GetUDPMethods(void);
+NSPR_API(const PRIOMethods*)    PR_GetPipeMethods(void);
+
+/*
+** Convert a NSPR socket handle to a native socket handle.
+**
+** Using this function makes your code depend on the properties of the
+** current NSPR implementation, which may change (although extremely
+** unlikely because of NSPR's backward compatibility requirement).  Avoid
+** using it if you can.
+**
+** If you use this function, you need to understand what NSPR does to
+** the native handle.  For example, NSPR puts native socket handles in
+** non-blocking mode or associates them with an I/O completion port (the
+** WINNT build configuration only).  Your use of the native handle should
+** not interfere with NSPR's use of the native handle.  If your code
+** changes the configuration of the native handle, (e.g., changes it to
+** blocking or closes it), NSPR will not work correctly.
+*/
+NSPR_API(PROsfd)       PR_FileDesc2NativeHandle(PRFileDesc *);
+NSPR_API(void)         PR_ChangeFileDescNativeHandle(PRFileDesc *, PROsfd);
+NSPR_API(PRFileDesc*)  PR_AllocFileDesc(PROsfd osfd,
+                                        const PRIOMethods *methods);
+NSPR_API(void)         PR_FreeFileDesc(PRFileDesc *fd);
+/*
+** Import an existing OS file to NSPR.
+*/
+NSPR_API(PRFileDesc*)  PR_ImportFile(PROsfd osfd);
+NSPR_API(PRFileDesc*)  PR_ImportPipe(PROsfd osfd);
+NSPR_API(PRFileDesc*)  PR_ImportTCPSocket(PROsfd osfd);
+NSPR_API(PRFileDesc*)  PR_ImportUDPSocket(PROsfd osfd);
+
+
+/*
+ *************************************************************************
+ * FUNCTION: PR_CreateSocketPollFd
+ * DESCRIPTION:
+ *     Create a PRFileDesc wrapper for a native socket handle, for use with
+ *     PR_Poll only
+ * INPUTS:
+ *     None
+ * OUTPUTS:
+ *     None
+ * RETURN: PRFileDesc*
+ *     Upon successful completion, PR_CreateSocketPollFd returns a pointer
+ *     to the PRFileDesc created for the native socket handle
+ *     Returns a NULL pointer if the create of a new PRFileDesc failed
+ *
+ **************************************************************************
+ */
+
+NSPR_API(PRFileDesc*)   PR_CreateSocketPollFd(PROsfd osfd);
+
+/*
+ *************************************************************************
+ * FUNCTION: PR_DestroySocketPollFd
+ * DESCRIPTION:
+ *     Destroy the PRFileDesc wrapper created by PR_CreateSocketPollFd
+ * INPUTS:
+ *     None
+ * OUTPUTS:
+ *     None
+ * RETURN: PRFileDesc*
+ *     Upon successful completion, PR_DestroySocketPollFd returns
+ *     PR_SUCCESS, else PR_FAILURE
+ *
+ **************************************************************************
+ */
+
+NSPR_API(PRStatus) PR_DestroySocketPollFd(PRFileDesc *fd);
+
+
+/*
+** Macros for PR_Socket
+**
+** Socket types: PR_SOCK_STREAM, PR_SOCK_DGRAM
+*/
+
+#ifdef WIN32
+
+#define PR_SOCK_STREAM 1
+#define PR_SOCK_DGRAM 2
+
+#else /* WIN32 */
+
+#define PR_SOCK_STREAM SOCK_STREAM
+#define PR_SOCK_DGRAM SOCK_DGRAM
+
+#endif /* WIN32 */
+
+/*
+** Create a new Socket; this function is obsolete.
+*/
+NSPR_API(PRFileDesc*)   PR_Socket(PRInt32 domain, PRInt32 type, PRInt32 proto);
+
+/* FUNCTION: PR_LockFile
+** DESCRIPTION:
+**    Lock a file for exclusive access.
+** RETURNS:
+**    PR_SUCCESS when the lock is held
+**    PR_FAILURE otherwise
+*/
+NSPR_API(PRStatus) PR_LockFile(PRFileDesc *fd);
+
+/* FUNCTION: PR_TLockFile
+** DESCRIPTION:
+**    Test and Lock a file for exclusive access.  Do not block if the
+**    file cannot be locked immediately.
+** RETURNS:
+**    PR_SUCCESS when the lock is held
+**    PR_FAILURE otherwise
+*/
+NSPR_API(PRStatus) PR_TLockFile(PRFileDesc *fd);
+
+/* FUNCTION: PR_UnlockFile
+** DESCRIPTION:
+**    Unlock a file which has been previously locked successfully by this
+**    process.
+** RETURNS:
+**    PR_SUCCESS when the lock is released
+**    PR_FAILURE otherwise
+*/
+NSPR_API(PRStatus) PR_UnlockFile(PRFileDesc *fd);
+
+/*
+** Emulate acceptread by accept and recv.
+*/
+NSPR_API(PRInt32) PR_EmulateAcceptRead(PRFileDesc *sd, PRFileDesc **nd,
+                                       PRNetAddr **raddr, void *buf, PRInt32 amount, PRIntervalTime timeout);
+
+/*
+** Emulate sendfile by reading from the file and writing to the socket.
+** The file is memory-mapped if memory-mapped files are supported.
+*/
+NSPR_API(PRInt32) PR_EmulateSendFile(
+    PRFileDesc *networkSocket, PRSendFileData *sendData,
+    PRTransmitFileFlags flags, PRIntervalTime timeout);
+
+#ifdef WIN32
+/* FUNCTION: PR_NTFast_AcceptRead
+** DESCRIPTION:
+**    NT has the notion of an "accept context", which is only needed in
+**    order to make certain calls.  By default, a socket connected via
+**    AcceptEx can only do a limited number of things without updating
+**    the acceptcontext.  The generic version of PR_AcceptRead always
+**    updates the accept context.  This version does not.
+**/
+NSPR_API(PRInt32) PR_NTFast_AcceptRead(PRFileDesc *sd, PRFileDesc **nd,
+                                       PRNetAddr **raddr, void *buf, PRInt32 amount, PRIntervalTime t);
+
+typedef void (*_PR_AcceptTimeoutCallback)(void *);
+
+/* FUNCTION: PR_NTFast_AcceptRead_WithTimeoutCallback
+** DESCRIPTION:
+**    The AcceptEx call combines the accept with the read function.  However,
+**    our daemon threads need to be able to wakeup and reliably flush their
+**    log buffers if the Accept times out.  However, with the current blocking
+**    interface to AcceptRead, there is no way for us to timeout the Accept;
+**    this is because when we timeout the Read, we can close the newly
+**    socket and continue; but when we timeout the accept itself, there is no
+**    new socket to timeout.  So instead, this version of the function is
+**    provided.  After the initial timeout period elapses on the accept()
+**    portion of the function, it will call the callback routine and then
+**    continue the accept.   If the timeout occurs on the read, it will
+**    close the connection and return error.
+*/
+NSPR_API(PRInt32) PR_NTFast_AcceptRead_WithTimeoutCallback(
+    PRFileDesc *sd,
+    PRFileDesc **nd,
+    PRNetAddr **raddr,
+    void *buf,
+    PRInt32 amount,
+    PRIntervalTime t,
+    _PR_AcceptTimeoutCallback callback,
+    void *callback_arg);
+
+/* FUNCTION: PR_NTFast_Accept
+** DESCRIPTION:
+**    NT has the notion of an "accept context", which is only needed in
+**    order to make certain calls.  By default, a socket connected via
+**    AcceptEx can only do a limited number of things without updating
+**    the acceptcontext.  The generic version of PR_Accept always
+**    updates the accept context.  This version does not.
+**/
+NSPR_API(PRFileDesc*)   PR_NTFast_Accept(PRFileDesc *fd, PRNetAddr *addr,
+        PRIntervalTime timeout);
+
+/* FUNCTION: PR_NTFast_Update
+** DESCRIPTION:
+**    For sockets accepted with PR_NTFast_Accept or PR_NTFastAcceptRead,
+**    this function will update the accept context for those sockets,
+**    so that the socket can make general purpose socket calls.
+**    Without calling this, the only operations supported on the socket
+**    Are PR_Read, PR_Write, PR_Transmitfile, and PR_Close.
+*/
+NSPR_API(void) PR_NTFast_UpdateAcceptContext(PRFileDesc *acceptSock,
+        PRFileDesc *listenSock);
+
+
+/* FUNCTION: PR_NT_CancelIo
+** DESCRIPTION:
+**    Cancel IO operations on fd.
+*/
+NSPR_API(PRStatus) PR_NT_CancelIo(PRFileDesc *fd);
+
+
+#endif /* WIN32 */
+
+PR_END_EXTERN_C
+
+#endif /* pprio_h___ */
diff --git a/nsprpub/pr/include/private/pprmwait.h b/nsprpub/pr/include/private/pprmwait.h
new file mode 100644
index 0000000000..3e4057c5f4
--- /dev/null
+++ b/nsprpub/pr/include/private/pprmwait.h
@@ -0,0 +1,103 @@
+/* -*- 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/. */
+
+#if defined(_PPRMWAIT_H)
+#else
+#define _PPRMWAIT_H
+
+#include "prlock.h"
+#include "prcvar.h"
+#include "prclist.h"
+#include "prthread.h"
+
+#define MAX_POLLING_INTERVAL 100
+#define _PR_POLL_COUNT_FUDGE 64
+#define _PR_DEFAULT_HASH_LENGTH 59
+
+/*
+ * Our hash table resolves collisions by open addressing with
+ * double hashing.  See Cormen, Leiserson, and Rivest,
+ * Introduction to Algorithms, p. 232, The MIT Press, 1990.
+ */
+
+#define _MW_HASH(a, m) ((((PRUptrdiff)(a) >> 4) ^ ((PRUptrdiff)(a) >> 10)) % (m))
+#define _MW_HASH2(a, m) (1 + ((((PRUptrdiff)(a) >> 4) ^ ((PRUptrdiff)(a) >> 10)) % (m - 2)))
+#define _MW_ABORTED(_rv) \
+    ((PR_FAILURE == (_rv)) && (PR_PENDING_INTERRUPT_ERROR == PR_GetError()))
+
+typedef enum {_prmw_success, _prmw_rehash, _prmw_error} _PR_HashStory;
+
+typedef struct _PRWaiterHash
+{
+    PRUint16 count;             /* current number in hash table */
+    PRUint16 length;            /* current size of the hash table */
+    PRRecvWait *recv_wait;      /* hash table of receive wait objects */
+} _PRWaiterHash;
+
+typedef enum {_prmw_running, _prmw_stopping, _prmw_stopped} PRMWGroupState;
+
+struct PRWaitGroup
+{
+    PRCList group_link;         /* all groups are linked to each other */
+    PRCList io_ready;           /* list of I/O requests that are ready */
+    PRMWGroupState state;       /* state of this group (so we can shut down) */
+
+    PRLock *ml;                 /* lock for synchronizing this wait group */
+    PRCondVar *io_taken;        /* calling threads notify when they take I/O */
+    PRCondVar *io_complete;     /* calling threads wait here for completions */
+    PRCondVar *new_business;    /* polling thread waits here more work */
+    PRCondVar *mw_manage;       /* used to manage group lists */
+    PRThread* poller;           /* thread that's actually doing the poll() */
+    PRUint16 waiting_threads;   /* number of threads waiting for recv */
+    PRUint16 polling_count;     /* number of elements in the polling list */
+    PRUint32 p_timestamp;       /* pseudo-time group had element removed */
+    PRPollDesc *polling_list;   /* list poller builds for polling */
+    PRIntervalTime last_poll;   /* last time we polled */
+    _PRWaiterHash *waiter;      /* pointer to hash table of wait receive objects */
+
+#ifdef WINNT
+    /*
+     * On NT, idle threads are responsible for getting completed i/o.
+     * They need to add completed i/o to the io_ready list.  Since
+     * idle threads cannot use nspr locks, we have to use an md lock
+     * to protect the io_ready list.
+     */
+    _MDLock mdlock;             /* protect io_ready, waiter, and wait_list */
+    PRCList wait_list;          /* used in place of io_complete.  reuse
+                                 * waitQLinks in the PRThread structure. */
+#endif /* WINNT */
+};
+
+/**********************************************************************
+***********************************************************************
+******************** Wait group enumerations **************************
+***********************************************************************
+**********************************************************************/
+typedef struct _PRGlobalState
+{
+    PRCList group_list;         /* master of the group list */
+    PRWaitGroup *group;         /* the default (NULL) group */
+} _PRGlobalState;
+
+#ifdef WINNT
+extern PRStatus NT_HashRemoveInternal(PRWaitGroup *group, PRFileDesc *fd);
+#endif
+
+typedef enum {_PR_ENUM_UNSEALED=0, _PR_ENUM_SEALED=0x0eadface} _PREnumSeal;
+
+struct PRMWaitEnumerator
+{
+    PRWaitGroup *group;       /* group this enumerator is bound to */
+    PRThread *thread;               /* thread in midst of an enumeration */
+    _PREnumSeal seal;               /* trying to detect deleted objects */
+    PRUint32 p_timestamp;           /* when enumeration was (re)started */
+    PRRecvWait **waiter;            /* pointer into hash table */
+    PRUintn index;                  /* position in hash table */
+    void *pad[4];                   /* some room to grow */
+};
+
+#endif /* defined(_PPRMWAIT_H) */
+
+/* pprmwait.h */
diff --git a/nsprpub/pr/include/private/pprthred.h b/nsprpub/pr/include/private/pprthred.h
new file mode 100644
index 0000000000..e566d8adad
--- /dev/null
+++ b/nsprpub/pr/include/private/pprthred.h
@@ -0,0 +1,311 @@
+/* -*- 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/. */
+
+#ifndef pprthred_h___
+#define pprthred_h___
+
+/*
+** API for PR private functions.  These calls are to be used by internal
+** developers only.
+*/
+#include "nspr.h"
+
+#if defined(XP_OS2)
+#define INCL_DOS
+#define INCL_DOSERRORS
+#define INCL_WIN
+#include <os2.h>
+#endif
+
+PR_BEGIN_EXTERN_C
+
+/*---------------------------------------------------------------------------
+** THREAD PRIVATE FUNCTIONS
+---------------------------------------------------------------------------*/
+
+/*
+** Associate a thread object with an existing native thread.
+**  "type" is the type of thread object to attach
+**  "priority" is the priority to assign to the thread
+**  "stack" defines the shape of the threads stack
+**
+** This can return NULL if some kind of error occurs, or if memory is
+** tight. This call invokes "start(obj,arg)" and returns when the
+** function returns. The thread object is automatically destroyed.
+**
+** This call is not normally needed unless you create your own native
+** thread. PR_Init does this automatically for the primordial thread.
+*/
+NSPR_API(PRThread*) PR_AttachThread(PRThreadType type,
+                                    PRThreadPriority priority,
+                                    PRThreadStack *stack);
+
+/*
+** Detach the nspr thread from the currently executing native thread.
+** The thread object will be destroyed and all related data attached
+** to it. The exit procs will be invoked.
+**
+** This call is not normally needed unless you create your own native
+** thread. PR_Exit will automatially detach the nspr thread object
+** created by PR_Init for the primordial thread.
+**
+** This call returns after the nspr thread object is destroyed.
+*/
+NSPR_API(void) PR_DetachThread(void);
+
+/*
+** Get the id of the named thread. Each thread is assigned a unique id
+** when it is created or attached.
+*/
+NSPR_API(PRUint32) PR_GetThreadID(PRThread *thread);
+
+/*
+** Set the procedure that is called when a thread is dumped. The procedure
+** will be applied to the argument, arg, when called. Setting the procedure
+** to NULL effectively removes it.
+*/
+typedef void (*PRThreadDumpProc)(PRFileDesc *fd, PRThread *t, void *arg);
+NSPR_API(void) PR_SetThreadDumpProc(
+    PRThread* thread, PRThreadDumpProc dump, void *arg);
+
+/*
+** Get this thread's affinity mask.  The affinity mask is a 32 bit quantity
+** marking a bit for each processor this process is allowed to run on.
+** The processor mask is returned in the mask argument.
+** The least-significant-bit represents processor 0.
+**
+** Returns 0 on success, -1 on failure.
+*/
+NSPR_API(PRInt32) PR_GetThreadAffinityMask(PRThread *thread, PRUint32 *mask);
+
+/*
+** Set this thread's affinity mask.
+**
+** Returns 0 on success, -1 on failure.
+*/
+NSPR_API(PRInt32) PR_SetThreadAffinityMask(PRThread *thread, PRUint32 mask );
+
+/*
+** Set the default CPU Affinity mask.
+**
+*/
+NSPR_API(PRInt32) PR_SetCPUAffinityMask(PRUint32 mask);
+
+/*
+** Show status of all threads to standard error output.
+*/
+NSPR_API(void) PR_ShowStatus(void);
+
+/*
+** Set thread recycle mode to on (1) or off (0)
+*/
+NSPR_API(void) PR_SetThreadRecycleMode(PRUint32 flag);
+
+
+/*---------------------------------------------------------------------------
+** THREAD PRIVATE FUNCTIONS FOR GARBAGE COLLECTIBLE THREADS
+---------------------------------------------------------------------------*/
+
+/*
+** Only Garbage collectible threads participate in resume all, suspend all and
+** enumeration operations.  They are also different during creation when
+** platform specific action may be needed (For example, all Solaris GC able
+** threads are bound threads).
+*/
+
+/*
+** Same as PR_CreateThread except that the thread is marked as garbage
+** collectible.
+*/
+NSPR_API(PRThread*) PR_CreateThreadGCAble(PRThreadType type,
+        void (*start)(void *arg),
+        void *arg,
+        PRThreadPriority priority,
+        PRThreadScope scope,
+        PRThreadState state,
+        PRUint32 stackSize);
+
+/*
+** Same as PR_AttachThread except that the thread being attached is marked as
+** garbage collectible.
+*/
+NSPR_API(PRThread*) PR_AttachThreadGCAble(PRThreadType type,
+        PRThreadPriority priority,
+        PRThreadStack *stack);
+
+/*
+** Mark the thread as garbage collectible.
+*/
+NSPR_API(void) PR_SetThreadGCAble(void);
+
+/*
+** Unmark the thread as garbage collectible.
+*/
+NSPR_API(void) PR_ClearThreadGCAble(void);
+
+/*
+** This routine prevents all other GC able threads from running. This call is needed by
+** the garbage collector.
+*/
+NSPR_API(void) PR_SuspendAll(void);
+
+/*
+** This routine unblocks all other GC able threads that were suspended from running by
+** PR_SuspendAll(). This call is needed by the garbage collector.
+*/
+NSPR_API(void) PR_ResumeAll(void);
+
+/*
+** Return the thread stack pointer of the given thread.
+** Needed by the garbage collector.
+*/
+NSPR_API(void *) PR_GetSP(PRThread *thread);
+
+/*
+** Save the registers that the GC would find interesting into the thread
+** "t". isCurrent will be non-zero if the thread state that is being
+** saved is the currently executing thread. Return the address of the
+** first register to be scanned as well as the number of registers to
+** scan in "np".
+**
+** If "isCurrent" is non-zero then it is allowed for the thread context
+** area to be used as scratch storage to hold just the registers
+** necessary for scanning.
+**
+** This function simply calls the internal function _MD_HomeGCRegisters().
+*/
+NSPR_API(PRWord *) PR_GetGCRegisters(PRThread *t, int isCurrent, int *np);
+
+/*
+** (Get|Set)ExecutionEnvironent
+**
+** Used by Java to associate it's execution environment so garbage collector
+** can find it. If return is NULL, then it's probably not a collectable thread.
+**
+** There's no locking required around these calls.
+*/
+NSPR_API(void*) GetExecutionEnvironment(PRThread *thread);
+NSPR_API(void) SetExecutionEnvironment(PRThread* thread, void *environment);
+
+/*
+** Enumeration function that applies "func(thread,i,arg)" to each active
+** thread in the process. The enumerator returns PR_SUCCESS if the enumeration
+** should continue, any other value is considered failure, and enumeration
+** stops, returning the failure value from PR_EnumerateThreads.
+** Needed by the garbage collector.
+*/
+typedef PRStatus (PR_CALLBACK *PREnumerator)(PRThread *t, int i, void *arg);
+NSPR_API(PRStatus) PR_EnumerateThreads(PREnumerator func, void *arg);
+
+/*
+** Signature of a thread stack scanning function. It is applied to every
+** contiguous group of potential pointers within a thread. Count denotes the
+** number of pointers.
+*/
+typedef PRStatus
+(PR_CALLBACK *PRScanStackFun)(PRThread* t,
+                              void** baseAddr, PRUword count, void* closure);
+
+/*
+** Applies scanFun to all contiguous groups of potential pointers
+** within a thread. This includes the stack, registers, and thread-local
+** data. If scanFun returns a status value other than PR_SUCCESS the scan
+** is aborted, and the status value is returned.
+*/
+NSPR_API(PRStatus)
+PR_ThreadScanStackPointers(PRThread* t,
+                           PRScanStackFun scanFun, void* scanClosure);
+
+/*
+** Calls PR_ThreadScanStackPointers for every thread.
+*/
+NSPR_API(PRStatus)
+PR_ScanStackPointers(PRScanStackFun scanFun, void* scanClosure);
+
+/*
+** Returns a conservative estimate on the amount of stack space left
+** on a thread in bytes, sufficient for making decisions about whether
+** to continue recursing or not.
+*/
+NSPR_API(PRUword)
+PR_GetStackSpaceLeft(PRThread* t);
+
+/*---------------------------------------------------------------------------
+** THREAD CPU PRIVATE FUNCTIONS
+---------------------------------------------------------------------------*/
+
+/*
+** Get a pointer to the primordial CPU.
+*/
+NSPR_API(struct _PRCPU *) _PR_GetPrimordialCPU(void);
+
+/*---------------------------------------------------------------------------
+** THREAD SYNCHRONIZATION PRIVATE FUNCTIONS
+---------------------------------------------------------------------------*/
+
+/*
+** Create a new named monitor (named for debugging purposes).
+**  Monitors are re-entrant locks with a built-in condition variable.
+**
+** This may fail if memory is tight or if some operating system resource
+** is low.
+*/
+NSPR_API(PRMonitor*) PR_NewNamedMonitor(const char* name);
+
+/*
+** Test and then lock the lock if it's not already locked by some other
+** thread. Return PR_FALSE if some other thread owned the lock at the
+** time of the call.
+*/
+NSPR_API(PRBool) PR_TestAndLock(PRLock *lock);
+
+/*
+** Test and then enter the mutex associated with the monitor if it's not
+** already entered by some other thread. Return PR_FALSE if some other
+** thread owned the mutex at the time of the call.
+*/
+NSPR_API(PRBool) PR_TestAndEnterMonitor(PRMonitor *mon);
+
+/*
+** Return the number of times that the current thread has entered the
+** mutex. Returns zero if the current thread has not entered the mutex.
+*/
+NSPR_API(PRIntn) PR_GetMonitorEntryCount(PRMonitor *mon);
+
+/*
+** Just like PR_CEnterMonitor except that if the monitor is owned by
+** another thread NULL is returned.
+*/
+NSPR_API(PRMonitor*) PR_CTestAndEnterMonitor(void *address);
+
+/*---------------------------------------------------------------------------
+** PLATFORM-SPECIFIC INITIALIZATION FUNCTIONS
+---------------------------------------------------------------------------*/
+#if defined(XP_OS2)
+/*
+** These functions need to be called at the start and end of a thread.
+** An EXCEPTIONREGISTRATIONRECORD must be declared on the stack and its
+** address passed to the two functions.
+*/
+NSPR_API(void) PR_OS2_SetFloatExcpHandler(EXCEPTIONREGISTRATIONRECORD* e);
+NSPR_API(void) PR_OS2_UnsetFloatExcpHandler(EXCEPTIONREGISTRATIONRECORD* e);
+#endif /* XP_OS2 */
+
+/* I think PR_GetMonitorEntryCount is useless. All you really want is this... */
+#define PR_InMonitor(m)     (PR_GetMonitorEntryCount(m) > 0)
+
+/*---------------------------------------------------------------------------
+** Special X-Lock hack for client
+---------------------------------------------------------------------------*/
+
+#ifdef XP_UNIX
+extern void PR_XLock(void);
+extern void PR_XUnlock(void);
+extern PRBool PR_XIsLocked(void);
+#endif /* XP_UNIX */
+
+PR_END_EXTERN_C
+
+#endif /* pprthred_h___ */
diff --git a/nsprpub/pr/include/private/primpl.h b/nsprpub/pr/include/private/primpl.h
new file mode 100644
index 0000000000..3f5a150470
--- /dev/null
+++ b/nsprpub/pr/include/private/primpl.h
@@ -0,0 +1,2149 @@
+/* -*- 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/. */
+
+#ifndef primpl_h___
+#define primpl_h___
+
+#if defined(_PR_PTHREADS)
+#include <pthread.h>
+#endif
+
+#ifdef WIN32
+/*
+ * Allow use of functions and symbols first defined in Win2k.
+ */
+#if !defined(WINVER) || (WINVER < 0x0500)
+#undef WINVER
+#define WINVER 0x0500
+#endif
+#if !defined(_WIN32_WINNT) || (_WIN32_WINNT < 0x0500)
+#undef _WIN32_WINNT
+#define _WIN32_WINNT 0x0500
+#endif
+#endif /* WIN32 */
+
+#include "nspr.h"
+#include "prpriv.h"
+
+typedef struct PRSegment PRSegment;
+
+#include "md/prosdep.h"
+#include "obsolete/probslet.h"
+
+#ifdef _PR_HAVE_POSIX_SEMAPHORES
+#include <semaphore.h>
+#elif defined(_PR_HAVE_SYSV_SEMAPHORES)
+#include <sys/sem.h>
+#endif
+
+#ifdef HAVE_SYSCALL
+#include <sys/syscall.h>
+#endif
+
+/*************************************************************************
+*****  A Word about Model Dependent Function Naming Convention ***********
+*************************************************************************/
+
+/*
+NSPR 2.0 must implement its function across a range of platforms
+including: MAC, Windows/16, Windows/95, Windows/NT, and several
+variants of Unix. Each implementation shares common code as well
+as having platform dependent portions. This standard describes how
+the model dependent portions are to be implemented.
+
+In header file pr/include/primpl.h, each publicly declared
+platform dependent function is declared as:
+
+NSPR_API void _PR_MD_FUNCTION( long arg1, long arg2 );
+#define _PR_MD_FUNCTION _MD_FUNCTION
+
+In header file pr/include/md/<platform>/_<platform>.h,
+each #define'd macro is redefined as one of:
+
+#define _MD_FUNCTION <blanks>
+#define _MD_FUNCTION <expanded macro>
+#define _MD_FUNCTION <osFunction>
+#define _MD_FUNCTION <_MD_Function>
+
+Where:
+
+<blanks> is no definition at all. In this case, the function is not implemented
+and is never called for this platform.
+For example:
+#define _MD_INIT_CPUS()
+
+<expanded macro> is a C language macro expansion.
+For example:
+#define        _MD_CLEAN_THREAD(_thread) \
+    PR_BEGIN_MACRO \
+        PR_DestroyCondVar(_thread->md.asyncIOCVar); \
+        PR_DestroyLock(_thread->md.asyncIOLock); \
+    PR_END_MACRO
+
+<osFunction> is some function implemented by the host operating system.
+For example:
+#define _MD_EXIT        exit
+
+<_MD_function> is the name of a function implemented for this platform in
+pr/src/md/<platform>/<soruce>.c file.
+For example:
+#define        _MD_GETFILEINFO         _MD_GetFileInfo
+
+In <source>.c, the implementation is:
+PR_IMPLEMENT(PRInt32) _MD_GetFileInfo(const char *fn, PRFileInfo *info);
+*/
+
+PR_BEGIN_EXTERN_C
+
+typedef struct _MDLock _MDLock;
+typedef struct _MDCVar _MDCVar;
+typedef struct _MDSegment _MDSegment;
+typedef struct _MDThread _MDThread;
+typedef struct _MDThreadStack _MDThreadStack;
+typedef struct _MDSemaphore _MDSemaphore;
+typedef struct _MDDir _MDDir;
+#ifdef MOZ_UNICODE
+typedef struct _MDDirUTF16 _MDDirUTF16;
+#endif /* MOZ_UNICODE */
+typedef struct _MDFileDesc _MDFileDesc;
+typedef struct _MDProcess _MDProcess;
+typedef struct _MDFileMap _MDFileMap;
+
+#if defined(_PR_PTHREADS)
+
+/*
+** The following definitions are unique to implementing NSPR using pthreads.
+** Since pthreads defines most of the thread and thread synchronization
+** stuff, this is a pretty small set.
+*/
+
+#define PT_CV_NOTIFIED_LENGTH 6
+typedef struct _PT_Notified _PT_Notified;
+struct _PT_Notified
+{
+    PRIntn length;              /* # of used entries in this structure */
+    struct
+    {
+        PRCondVar *cv;          /* the condition variable notified */
+        PRIntn times;           /* and the number of times notified */
+    } cv[PT_CV_NOTIFIED_LENGTH];
+    _PT_Notified *link;         /* link to another of these | NULL */
+};
+
+/*
+ * bits defined for pthreads 'state' field
+ */
+#define PT_THREAD_DETACHED  0x01    /* thread can't be joined */
+#define PT_THREAD_GLOBAL    0x02    /* a global thread (unlikely) */
+#define PT_THREAD_SYSTEM    0x04    /* system (not user) thread */
+#define PT_THREAD_PRIMORD   0x08    /* this is the primordial thread */
+#define PT_THREAD_ABORTED   0x10    /* thread has been interrupted */
+#define PT_THREAD_GCABLE    0x20    /* thread is garbage collectible */
+#define PT_THREAD_SUSPENDED 0x40    /* thread has been suspended */
+#define PT_THREAD_FOREIGN   0x80    /* thread is not one of ours */
+#define PT_THREAD_BOUND     0x100    /* a bound-global thread */
+
+#define _PT_THREAD_INTERRUPTED(thr)                 \
+        (!(thr->interrupt_blocked) && (thr->state & PT_THREAD_ABORTED))
+#define _PT_THREAD_BLOCK_INTERRUPT(thr)             \
+        (thr->interrupt_blocked = 1)
+#define _PT_THREAD_UNBLOCK_INTERRUPT(thr)           \
+        (thr->interrupt_blocked = 0)
+
+#define _PT_IS_GCABLE_THREAD(thr) ((thr)->state & PT_THREAD_GCABLE)
+
+/*
+** Possible values for thread's suspend field
+** Note that the first two can be the same as they are really mutually exclusive,
+** i.e. both cannot be happening at the same time. We have two symbolic names
+** just as a mnemonic.
+**/
+#define PT_THREAD_RESUMED   0x80    /* thread has been resumed */
+#define PT_THREAD_SETGCABLE 0x100   /* set the GCAble flag */
+
+#if defined(DEBUG)
+
+typedef struct PTDebug
+{
+    PRTime timeStarted;
+    PRUintn locks_created, locks_destroyed;
+    PRUintn locks_acquired, locks_released;
+    PRUintn cvars_created, cvars_destroyed;
+    PRUintn cvars_notified, delayed_cv_deletes;
+} PTDebug;
+
+#endif /* defined(DEBUG) */
+
+NSPR_API(void) PT_FPrintStats(PRFileDesc *fd, const char *msg);
+
+/*
+ * On Linux and its derivatives POSIX priority scheduling works only for
+ * real-time threads. On those platforms we set thread's nice values
+ * instead which requires us to track kernel thread IDs for each POSIX
+ * thread we create.
+ */
+#if defined(LINUX) && defined(HAVE_SETPRIORITY) && \
+    ((defined(HAVE_SYSCALL) && defined(SYS_gettid)) || defined(HAVE_GETTID))
+#define _PR_NICE_PRIORITY_SCHEDULING
+#endif
+
+#else /* defined(_PR_PTHREADS) */
+
+NSPR_API(void) PT_FPrintStats(PRFileDesc *fd, const char *msg);
+
+/*
+** This section is contains those parts needed to implement NSPR on
+** platforms in general. One would assume that the pthreads implementation
+** included lots of the same types, at least conceptually.
+*/
+
+/*
+ * Local threads only.  No multiple CPU support and hence all the
+ * following routines are no-op.
+ */
+#ifdef _PR_LOCAL_THREADS_ONLY
+
+#define        _PR_MD_SUSPEND_THREAD(thread)
+#define        _PR_MD_RESUME_THREAD(thread)
+#define        _PR_MD_SUSPEND_CPU(cpu)
+#define        _PR_MD_RESUME_CPU(cpu)
+#define        _PR_MD_BEGIN_SUSPEND_ALL()
+#define        _PR_MD_END_SUSPEND_ALL()
+#define        _PR_MD_BEGIN_RESUME_ALL()
+#define        _PR_MD_END_RESUME_ALL()
+#define _PR_MD_INIT_ATTACHED_THREAD(thread) PR_FAILURE
+
+#endif
+
+typedef struct _PRCPUQueue _PRCPUQueue;
+typedef struct _PRCPU _PRCPU;
+typedef struct _MDCPU _MDCPU;
+
+struct _PRCPUQueue {
+    _MDLock  runQLock;          /* lock for the run + wait queues */
+    _MDLock  sleepQLock;        /* lock for the run + wait queues */
+    _MDLock  miscQLock;         /* lock for the run + wait queues */
+
+    PRCList runQ[PR_PRIORITY_LAST + 1]; /* run queue for this CPU */
+    PRUint32  runQReadyMask;
+    PRCList sleepQ;
+    PRIntervalTime sleepQmax;
+    PRCList pauseQ;
+    PRCList suspendQ;
+    PRCList waitingToJoinQ;
+
+    PRUintn   numCPUs;          /* number of CPUs using this Q */
+};
+
+struct _PRCPU {
+    PRCList links;              /* link list of CPUs */
+    PRUint32 id;                /* id for this CPU */
+
+    union {
+        PRInt32 bits;
+        PRUint8 missed[4];
+    } u;
+    PRIntn where;               /* index into u.missed */
+    PRPackedBool paused;        /* cpu is paused */
+    PRPackedBool exit;          /* cpu should exit */
+
+    PRThread *thread;           /* native thread for this CPUThread */
+    PRThread *idle_thread;      /* user-level idle thread for this CPUThread */
+
+    PRIntervalTime last_clock;  /* the last time we went into
+                                 * _PR_ClockInterrupt() on this CPU
+                                 */
+
+    _PRCPUQueue *queue;
+
+    _MDCPU md;
+};
+
+typedef struct _PRInterruptTable {
+    const char *name;
+    PRUintn missed_bit;
+    void (*handler)(void);
+} _PRInterruptTable;
+
+#define _PR_CPU_PTR(_qp) \
+    ((_PRCPU*) ((char*) (_qp) - offsetof(_PRCPU,links)))
+
+#if !defined(WIN32) && !defined(XP_OS2) \
+        && !(defined(SOLARIS) && defined(_PR_GLOBAL_THREADS_ONLY))
+#define _MD_GET_ATTACHED_THREAD()        (_PR_MD_CURRENT_THREAD())
+#endif
+
+#ifdef _PR_LOCAL_THREADS_ONLY
+
+NSPR_API(struct _PRCPU *)              _pr_currentCPU;
+NSPR_API(PRThread *)                   _pr_currentThread;
+NSPR_API(PRThread *)                   _pr_lastThread;
+NSPR_API(PRInt32)                      _pr_intsOff;
+
+#define _MD_CURRENT_CPU()               (_pr_currentCPU)
+#define _MD_SET_CURRENT_CPU(_cpu)       (_pr_currentCPU = (_cpu))
+#define _MD_CURRENT_THREAD()            (_pr_currentThread)
+#define _MD_SET_CURRENT_THREAD(_thread) (_pr_currentThread = (_thread))
+#define _MD_LAST_THREAD()               (_pr_lastThread)
+#define _MD_SET_LAST_THREAD(t)          (_pr_lastThread = t)
+
+#define _MD_GET_INTSOFF()               (_pr_intsOff)
+#define _MD_SET_INTSOFF(_val)           (_pr_intsOff = _val)
+
+
+/* The unbalanced curly braces in these two macros are intentional */
+#define _PR_LOCK_HEAP() { PRIntn _is; if (_pr_currentCPU) _PR_INTSOFF(_is);
+#define _PR_UNLOCK_HEAP() if (_pr_currentCPU) _PR_INTSON(_is); }
+
+#endif /* _PR_LOCAL_THREADS_ONLY */
+
+extern PRInt32                  _native_threads_only;
+
+#if defined(_PR_GLOBAL_THREADS_ONLY)
+
+#define _MD_GET_INTSOFF() 0
+#define _MD_SET_INTSOFF(_val)
+#define _PR_INTSOFF(_is)
+#define _PR_FAST_INTSON(_is)
+#define _PR_INTSON(_is)
+#define _PR_THREAD_LOCK(_thread)
+#define _PR_THREAD_UNLOCK(_thread)
+#define _PR_RUNQ_LOCK(cpu)
+#define _PR_RUNQ_UNLOCK(cpu)
+#define _PR_SLEEPQ_LOCK(thread)
+#define _PR_SLEEPQ_UNLOCK(thread)
+#define _PR_MISCQ_LOCK(thread)
+#define _PR_MISCQ_UNLOCK(thread)
+#define _PR_CPU_LIST_LOCK()
+#define _PR_CPU_LIST_UNLOCK()
+
+#define _PR_ADD_RUNQ(_thread, _cpu, _pri)
+#define _PR_DEL_RUNQ(_thread)
+#define _PR_ADD_SLEEPQ(_thread, _timeout)
+#define _PR_DEL_SLEEPQ(_thread, _propogate)
+#define _PR_ADD_JOINQ(_thread, _cpu)
+#define _PR_DEL_JOINQ(_thread)
+#define _PR_ADD_SUSPENDQ(_thread, _cpu)
+#define _PR_DEL_SUSPENDQ(_thread)
+
+#define _PR_THREAD_SWITCH_CPU(_thread, _newCPU)
+
+#define _PR_IS_NATIVE_THREAD(thread) 1
+#define _PR_IS_NATIVE_THREAD_SUPPORTED() 1
+
+#else
+
+#define _PR_INTSOFF(_is) \
+    PR_BEGIN_MACRO \
+        (_is) = _PR_MD_GET_INTSOFF(); \
+        _PR_MD_SET_INTSOFF(1); \
+    PR_END_MACRO
+
+#define _PR_FAST_INTSON(_is) \
+    PR_BEGIN_MACRO \
+        _PR_MD_SET_INTSOFF(_is); \
+    PR_END_MACRO
+
+#define _PR_INTSON(_is) \
+    PR_BEGIN_MACRO \
+        if ((_is == 0) && (_PR_MD_CURRENT_CPU())->u.bits) \
+                _PR_IntsOn((_PR_MD_CURRENT_CPU())); \
+        _PR_MD_SET_INTSOFF(_is); \
+    PR_END_MACRO
+
+#ifdef _PR_LOCAL_THREADS_ONLY
+
+#define _PR_IS_NATIVE_THREAD(thread) 0
+#define _PR_THREAD_LOCK(_thread)
+#define _PR_THREAD_UNLOCK(_thread)
+#define _PR_RUNQ_LOCK(cpu)
+#define _PR_RUNQ_UNLOCK(cpu)
+#define _PR_SLEEPQ_LOCK(thread)
+#define _PR_SLEEPQ_UNLOCK(thread)
+#define _PR_MISCQ_LOCK(thread)
+#define _PR_MISCQ_UNLOCK(thread)
+#define _PR_CPU_LIST_LOCK()
+#define _PR_CPU_LIST_UNLOCK()
+
+#define _PR_ADD_RUNQ(_thread, _cpu, _pri) \
+    PR_BEGIN_MACRO \
+    PR_APPEND_LINK(&(_thread)->links, &_PR_RUNQ(_cpu)[_pri]); \
+    _PR_RUNQREADYMASK(_cpu) |= (1L << _pri); \
+    PR_END_MACRO
+
+#define _PR_DEL_RUNQ(_thread) \
+    PR_BEGIN_MACRO \
+    _PRCPU *_cpu = _thread->cpu; \
+    PRInt32 _pri = _thread->priority; \
+    PR_REMOVE_LINK(&(_thread)->links); \
+    if (PR_CLIST_IS_EMPTY(&_PR_RUNQ(_cpu)[_pri])) \
+        _PR_RUNQREADYMASK(_cpu) &= ~(1L << _pri); \
+    PR_END_MACRO
+
+#define _PR_ADD_SLEEPQ(_thread, _timeout) \
+    _PR_AddSleepQ(_thread, _timeout);
+
+#define _PR_DEL_SLEEPQ(_thread, _propogate) \
+    _PR_DelSleepQ(_thread, _propogate);
+
+#define _PR_ADD_JOINQ(_thread, _cpu) \
+    PR_APPEND_LINK(&(_thread)->links, &_PR_WAITINGTOJOINQ(_cpu));
+
+#define _PR_DEL_JOINQ(_thread) \
+    PR_REMOVE_LINK(&(_thread)->links);
+
+#define _PR_ADD_SUSPENDQ(_thread, _cpu) \
+    PR_APPEND_LINK(&(_thread)->links, &_PR_SUSPENDQ(_cpu));
+
+#define _PR_DEL_SUSPENDQ(_thread) \
+    PR_REMOVE_LINK(&(_thread)->links);
+
+#define _PR_THREAD_SWITCH_CPU(_thread, _newCPU)
+
+#define _PR_IS_NATIVE_THREAD_SUPPORTED() 0
+
+#else        /* _PR_LOCAL_THREADS_ONLY */
+
+/* These are for the "combined" thread model */
+
+#define _PR_THREAD_LOCK(_thread) \
+    _PR_MD_LOCK(&(_thread)->threadLock);
+
+#define _PR_THREAD_UNLOCK(_thread) \
+    _PR_MD_UNLOCK(&(_thread)->threadLock);
+
+#define _PR_RUNQ_LOCK(_cpu) \
+    PR_BEGIN_MACRO \
+    _PR_MD_LOCK(&(_cpu)->queue->runQLock );\
+    PR_END_MACRO
+
+#define _PR_RUNQ_UNLOCK(_cpu) \
+    PR_BEGIN_MACRO \
+    _PR_MD_UNLOCK(&(_cpu)->queue->runQLock );\
+    PR_END_MACRO
+
+#define _PR_SLEEPQ_LOCK(_cpu) \
+    _PR_MD_LOCK(&(_cpu)->queue->sleepQLock );
+
+#define _PR_SLEEPQ_UNLOCK(_cpu) \
+    _PR_MD_UNLOCK(&(_cpu)->queue->sleepQLock );
+
+#define _PR_MISCQ_LOCK(_cpu) \
+    _PR_MD_LOCK(&(_cpu)->queue->miscQLock );
+
+#define _PR_MISCQ_UNLOCK(_cpu) \
+    _PR_MD_UNLOCK(&(_cpu)->queue->miscQLock );
+
+#define _PR_CPU_LIST_LOCK()                 _PR_MD_LOCK(&_pr_cpuLock)
+#define _PR_CPU_LIST_UNLOCK()               _PR_MD_UNLOCK(&_pr_cpuLock)
+
+#define QUEUE_RUN           0x1
+#define QUEUE_SLEEP         0x2
+#define QUEUE_JOIN          0x4
+#define QUEUE_SUSPEND       0x8
+#define QUEUE_LOCK          0x10
+
+#define _PR_ADD_RUNQ(_thread, _cpu, _pri) \
+    PR_BEGIN_MACRO \
+    PR_APPEND_LINK(&(_thread)->links, &_PR_RUNQ(_cpu)[_pri]); \
+    _PR_RUNQREADYMASK(_cpu) |= (1L << _pri); \
+    PR_ASSERT((_thread)->queueCount == 0); \
+    (_thread)->queueCount = QUEUE_RUN; \
+    PR_END_MACRO
+
+#define _PR_DEL_RUNQ(_thread) \
+    PR_BEGIN_MACRO \
+    _PRCPU *_cpu = _thread->cpu; \
+    PRInt32 _pri = _thread->priority; \
+    PR_REMOVE_LINK(&(_thread)->links); \
+    if (PR_CLIST_IS_EMPTY(&_PR_RUNQ(_cpu)[_pri])) \
+        _PR_RUNQREADYMASK(_cpu) &= ~(1L << _pri); \
+    PR_ASSERT((_thread)->queueCount == QUEUE_RUN);\
+    (_thread)->queueCount = 0; \
+    PR_END_MACRO
+
+#define _PR_ADD_SLEEPQ(_thread, _timeout) \
+    PR_ASSERT((_thread)->queueCount == 0); \
+    (_thread)->queueCount = QUEUE_SLEEP; \
+    _PR_AddSleepQ(_thread, _timeout);
+
+#define _PR_DEL_SLEEPQ(_thread, _propogate) \
+    PR_ASSERT((_thread)->queueCount == QUEUE_SLEEP);\
+    (_thread)->queueCount = 0; \
+    _PR_DelSleepQ(_thread, _propogate);
+
+#define _PR_ADD_JOINQ(_thread, _cpu) \
+    PR_ASSERT((_thread)->queueCount == 0); \
+    (_thread)->queueCount = QUEUE_JOIN; \
+    PR_APPEND_LINK(&(_thread)->links, &_PR_WAITINGTOJOINQ(_cpu));
+
+#define _PR_DEL_JOINQ(_thread) \
+    PR_ASSERT((_thread)->queueCount == QUEUE_JOIN);\
+    (_thread)->queueCount = 0; \
+    PR_REMOVE_LINK(&(_thread)->links);
+
+#define _PR_ADD_SUSPENDQ(_thread, _cpu) \
+    PR_ASSERT((_thread)->queueCount == 0); \
+    (_thread)->queueCount = QUEUE_SUSPEND; \
+    PR_APPEND_LINK(&(_thread)->links, &_PR_SUSPENDQ(_cpu));
+
+#define _PR_DEL_SUSPENDQ(_thread) \
+    PR_ASSERT((_thread)->queueCount == QUEUE_SUSPEND);\
+    (_thread)->queueCount = 0; \
+    PR_REMOVE_LINK(&(_thread)->links);
+
+#define _PR_THREAD_SWITCH_CPU(_thread, _newCPU) \
+    (_thread)->cpu = (_newCPU);
+
+#define _PR_IS_NATIVE_THREAD(thread) (thread->flags & _PR_GLOBAL_SCOPE)
+#define _PR_IS_NATIVE_THREAD_SUPPORTED() 1
+
+#endif /* _PR_LOCAL_THREADS_ONLY */
+
+#endif /* _PR_GLOBAL_THREADS_ONLY */
+
+#define _PR_SET_RESCHED_FLAG() _PR_MD_CURRENT_CPU()->u.missed[3] = 1
+#define _PR_CLEAR_RESCHED_FLAG() _PR_MD_CURRENT_CPU()->u.missed[3] = 0
+
+extern _PRInterruptTable _pr_interruptTable[];
+
+/* Bits for _pr_interruptState.u.missed[0,1] */
+#define _PR_MISSED_CLOCK    0x1
+#define _PR_MISSED_IO        0x2
+#define _PR_MISSED_CHILD    0x4
+
+extern void _PR_IntsOn(_PRCPU *cpu);
+
+NSPR_API(void) _PR_WakeupCPU(void);
+NSPR_API(void) _PR_PauseCPU(void);
+
+/************************************************************************/
+
+#define _PR_LOCK_LOCK(_lock) \
+    _PR_MD_LOCK(&(_lock)->ilock);
+#define _PR_LOCK_UNLOCK(_lock) \
+    _PR_MD_UNLOCK(&(_lock)->ilock);
+
+extern void _PR_UnblockLockWaiter(PRLock *lock);
+extern PRStatus _PR_InitLock(PRLock *lock);
+extern void _PR_FreeLock(PRLock *lock);
+
+#define _PR_LOCK_PTR(_qp) \
+    ((PRLock*) ((char*) (_qp) - offsetof(PRLock,links)))
+
+/************************************************************************/
+
+#define _PR_CVAR_LOCK(_cvar) \
+    _PR_MD_LOCK(&(_cvar)->ilock);
+#define _PR_CVAR_UNLOCK(_cvar) \
+    _PR_MD_UNLOCK(&(_cvar)->ilock);
+
+extern PRStatus _PR_InitCondVar(PRCondVar *cvar, PRLock *lock);
+extern void _PR_FreeCondVar(PRCondVar *cvar);
+extern PRStatus _PR_WaitCondVar(
+    PRThread *thread, PRCondVar *cvar, PRLock *lock, PRIntervalTime timeout);
+extern void _PR_NotifyCondVar(PRCondVar *cvar, PRThread *me);
+extern PRUint32 _PR_CondVarToString(PRCondVar *cvar, char *buf, PRUint32 buflen);
+
+NSPR_API(void) _PR_Notify(PRMonitor *mon, PRBool all, PRBool sticky);
+
+/* PRThread.flags */
+#define _PR_SYSTEM          0x01
+#define _PR_INTERRUPT       0x02
+#define _PR_ATTACHED        0x04        /* created via PR_AttachThread */
+#define _PR_PRIMORDIAL      0x08        /* the thread that called PR_Init */
+#define _PR_ON_SLEEPQ       0x10        /* thread is on the sleepQ */
+#define _PR_ON_PAUSEQ       0x20        /* thread is on the pauseQ */
+#define _PR_SUSPENDING      0x40        /* thread wants to suspend */
+#define _PR_GLOBAL_SCOPE    0x80        /* thread is global scope */
+#define _PR_IDLE_THREAD     0x200       /* this is an idle thread        */
+#define _PR_GCABLE_THREAD   0x400       /* this is a collectable thread */
+#define _PR_BOUND_THREAD    0x800       /* a bound thread */
+#define _PR_INTERRUPT_BLOCKED   0x1000  /* interrupts blocked */
+
+/* PRThread.state */
+#define _PR_UNBORN       0
+#define _PR_RUNNABLE     1
+#define _PR_RUNNING      2
+#define _PR_LOCK_WAIT    3
+#define _PR_COND_WAIT    4
+#define _PR_JOIN_WAIT    5
+#define _PR_IO_WAIT      6
+#define _PR_SUSPENDED    7
+#define _PR_DEAD_STATE   8  /* for debugging */
+
+/* PRThreadStack.flags */
+#define _PR_STACK_VM            0x1    /* using vm instead of malloc */
+#define _PR_STACK_MAPPED        0x2    /* vm is mapped */
+#define _PR_STACK_PRIMORDIAL    0x4    /* stack for primordial thread */
+
+/*
+** If the default stcksize from the client is zero, we need to pick a machine
+** dependent value.  This is only for standard user threads.  For custom threads,
+** 0 has a special meaning.
+** Adjust stackSize. Round up to a page boundary.
+*/
+
+#ifndef _MD_MINIMUM_STACK_SIZE
+#define _MD_MINIMUM_STACK_SIZE  0
+#endif
+
+#if (!defined(HAVE_CUSTOM_USER_THREADS))
+#define        _PR_ADJUST_STACKSIZE(stackSize) \
+        PR_BEGIN_MACRO \
+    if (stackSize == 0) \
+                stackSize = _MD_DEFAULT_STACK_SIZE; \
+    if (stackSize < _MD_MINIMUM_STACK_SIZE) \
+                stackSize = _MD_MINIMUM_STACK_SIZE; \
+    stackSize = (stackSize + (1 << _pr_pageShift) - 1) >> _pr_pageShift; \
+    stackSize <<= _pr_pageShift; \
+        PR_END_MACRO
+#else
+#define        _PR_ADJUST_STACKSIZE(stackSize)
+#endif
+
+#define _PR_IS_GCABLE_THREAD(thr) ((thr)->flags & _PR_GCABLE_THREAD)
+
+#define _PR_PENDING_INTERRUPT(thr)                  \
+        (!((thr)->flags & _PR_INTERRUPT_BLOCKED) && ((thr)->flags & _PR_INTERRUPT))
+#define _PR_THREAD_BLOCK_INTERRUPT(thr)         \
+        (thr->flags |= _PR_INTERRUPT_BLOCKED)
+#define _PR_THREAD_UNBLOCK_INTERRUPT(thr)           \
+        (thr->flags &= ~_PR_INTERRUPT_BLOCKED)
+
+#define _PR_THREAD_PTR(_qp) \
+    ((PRThread*) ((char*) (_qp) - offsetof(PRThread,links)))
+
+#define _PR_ACTIVE_THREAD_PTR(_qp) \
+    ((PRThread*) ((char*) (_qp) - offsetof(PRThread,active)))
+
+#define _PR_THREAD_CONDQ_PTR(_qp) \
+    ((PRThread*) ((char*) (_qp) - offsetof(PRThread,waitQLinks)))
+
+#define _PR_THREAD_MD_TO_PTR(_md) \
+    ((PRThread*) ((char*) (_md) - offsetof(PRThread,md)))
+
+#define _PR_THREAD_STACK_TO_PTR(_stack) \
+    ((PRThread*) (_stack->thr))
+
+extern PRCList _pr_active_local_threadQ;
+extern PRCList _pr_active_global_threadQ;
+extern PRCList _pr_cpuQ;
+extern _MDLock  _pr_cpuLock;
+extern PRInt32 _pr_md_idle_cpus;
+
+#define _PR_ACTIVE_LOCAL_THREADQ()          _pr_active_local_threadQ
+#define _PR_ACTIVE_GLOBAL_THREADQ()         _pr_active_global_threadQ
+#define _PR_CPUQ()                          _pr_cpuQ
+#define _PR_RUNQ(_cpu)                      ((_cpu)->queue->runQ)
+#define _PR_RUNQREADYMASK(_cpu)             ((_cpu)->queue->runQReadyMask)
+#define _PR_SLEEPQ(_cpu)                    ((_cpu)->queue->sleepQ)
+#define _PR_SLEEPQMAX(_cpu)                 ((_cpu)->queue->sleepQmax)
+#define _PR_PAUSEQ(_cpu)                    ((_cpu)->queue->pauseQ)
+#define _PR_SUSPENDQ(_cpu)                  ((_cpu)->queue->suspendQ)
+#define _PR_WAITINGTOJOINQ(_cpu)            ((_cpu)->queue->waitingToJoinQ)
+
+extern PRUint32 _pr_recycleThreads;   /* Flag for behavior on thread cleanup */
+extern PRLock *_pr_deadQLock;
+extern PRUint32 _pr_numNativeDead;
+extern PRUint32 _pr_numUserDead;
+extern PRCList _pr_deadNativeQ;
+extern PRCList _pr_deadUserQ;
+#define _PR_DEADNATIVEQ     _pr_deadNativeQ
+#define _PR_DEADUSERQ       _pr_deadUserQ
+#define _PR_DEADQ_LOCK      PR_Lock(_pr_deadQLock);
+#define _PR_DEADQ_UNLOCK    PR_Unlock(_pr_deadQLock);
+#define _PR_INC_DEADNATIVE  (_pr_numNativeDead++)
+#define _PR_DEC_DEADNATIVE  (_pr_numNativeDead--)
+#define _PR_NUM_DEADNATIVE  (_pr_numNativeDead)
+#define _PR_INC_DEADUSER    (_pr_numUserDead++)
+#define _PR_DEC_DEADUSER    (_pr_numUserDead--)
+#define _PR_NUM_DEADUSER    (_pr_numUserDead)
+
+extern PRUint32 _pr_utid;
+
+extern struct _PRCPU  *_pr_primordialCPU;
+
+extern PRLock *_pr_activeLock;          /* lock for userActive and systemActive */
+extern PRInt32 _pr_userActive;          /* number of active user threads */
+extern PRInt32 _pr_systemActive;        /* number of active system threads */
+extern PRInt32 _pr_primordialExitCount; /* number of user threads left
+                                         * before the primordial thread
+                                         * can exit.  */
+extern PRCondVar *_pr_primordialExitCVar; /* the condition variable for
+                                           * notifying the primordial thread
+                                           * when all other user threads
+                                           * have terminated.  */
+
+extern PRUintn _pr_maxPTDs;
+
+extern PRLock *_pr_terminationCVLock;
+
+/*************************************************************************
+* Internal routines either called by PR itself or from machine-dependent *
+* code.                                                                  *
+*************************************************************************/
+
+extern void _PR_ClockInterrupt(void);
+
+extern void _PR_Schedule(void);
+extern void _PR_SetThreadPriority(
+    PRThread* thread, PRThreadPriority priority);
+
+/***********************************************************************
+** FUNCTION:    _PR_NewSegment()
+** DESCRIPTION:
+**   Allocate a memory segment. The "size" value is rounded up to the
+**   native system page size and a page aligned portion of memory is
+**   returned.  This memory is not part of the malloc heap. If "vaddr" is
+**   not NULL then PR tries to allocate the segment at the desired virtual
+**   address.
+** INPUTS:  size:  size of the desired memory segment
+**          vaddr:  address at which the newly aquired segment is to be
+**                  mapped into memory.
+** OUTPUTS: a memory segment is allocated, a PRSegment is allocated
+** RETURN:  pointer to PRSegment
+***********************************************************************/
+extern PRSegment* _PR_NewSegment(PRUint32 size, void *vaddr);
+
+/***********************************************************************
+** FUNCTION:    _PR_DestroySegment()
+** DESCRIPTION:
+**   The memory segment and the PRSegment are freed
+** INPUTS:  seg:  pointer to PRSegment to be freed
+** OUTPUTS: the the PRSegment and its associated memory segment are freed
+** RETURN:  void
+***********************************************************************/
+extern void _PR_DestroySegment(PRSegment *seg);
+
+extern PRThreadStack * _PR_NewStack(PRUint32 stackSize);
+extern void _PR_FreeStack(PRThreadStack *stack);
+extern PRBool _PR_NotifyThread (PRThread *thread, PRThread *me);
+extern void _PR_NotifyLockedThread (PRThread *thread);
+
+NSPR_API(void) _PR_AddSleepQ(PRThread *thread, PRIntervalTime timeout);
+NSPR_API(void) _PR_DelSleepQ(PRThread *thread, PRBool propogate_time);
+
+extern void _PR_AddThreadToRunQ(PRThread *me, PRThread *thread);
+
+NSPR_API(PRThread*) _PR_CreateThread(PRThreadType type,
+                                     void (*start)(void *arg),
+                                     void *arg,
+                                     PRThreadPriority priority,
+                                     PRThreadScope scope,
+                                     PRThreadState state,
+                                     PRUint32 stackSize,
+                                     PRUint32 flags);
+
+extern void _PR_NativeDestroyThread(PRThread *thread);
+extern void _PR_UserDestroyThread(PRThread *thread);
+
+extern PRThread* _PRI_AttachThread(
+    PRThreadType type, PRThreadPriority priority,
+    PRThreadStack *stack, PRUint32 flags);
+
+extern void _PRI_DetachThread(void);
+
+
+#define _PR_IO_PENDING(_thread) ((_thread)->io_pending)
+
+NSPR_API(void) _PR_MD_INIT_CPUS();
+#define    _PR_MD_INIT_CPUS _MD_INIT_CPUS
+
+NSPR_API(void) _PR_MD_WAKEUP_CPUS();
+#define    _PR_MD_WAKEUP_CPUS _MD_WAKEUP_CPUS
+
+/* Interrupts related */
+
+NSPR_API(void) _PR_MD_START_INTERRUPTS(void);
+#define    _PR_MD_START_INTERRUPTS _MD_START_INTERRUPTS
+
+NSPR_API(void) _PR_MD_STOP_INTERRUPTS(void);
+#define    _PR_MD_STOP_INTERRUPTS _MD_STOP_INTERRUPTS
+
+NSPR_API(void) _PR_MD_ENABLE_CLOCK_INTERRUPTS(void);
+#define    _PR_MD_ENABLE_CLOCK_INTERRUPTS _MD_ENABLE_CLOCK_INTERRUPTS
+
+NSPR_API(void) _PR_MD_DISABLE_CLOCK_INTERRUPTS(void);
+#define    _PR_MD_DISABLE_CLOCK_INTERRUPTS _MD_DISABLE_CLOCK_INTERRUPTS
+
+NSPR_API(void) _PR_MD_BLOCK_CLOCK_INTERRUPTS(void);
+#define    _PR_MD_BLOCK_CLOCK_INTERRUPTS _MD_BLOCK_CLOCK_INTERRUPTS
+
+NSPR_API(void) _PR_MD_UNBLOCK_CLOCK_INTERRUPTS(void);
+#define    _PR_MD_UNBLOCK_CLOCK_INTERRUPTS _MD_UNBLOCK_CLOCK_INTERRUPTS
+
+/* The _PR_MD_WAIT_LOCK and _PR_MD_WAKEUP_WAITER functions put to sleep and
+ * awaken a thread which is waiting on a lock or cvar.
+ */
+extern PRStatus _PR_MD_WAIT(PRThread *, PRIntervalTime timeout);
+#define    _PR_MD_WAIT _MD_WAIT
+
+extern PRStatus _PR_MD_WAKEUP_WAITER(PRThread *);
+#define    _PR_MD_WAKEUP_WAITER _MD_WAKEUP_WAITER
+
+#ifndef _PR_LOCAL_THREADS_ONLY /* not if only local threads supported */
+NSPR_API(void) _PR_MD_CLOCK_INTERRUPT(void);
+#define    _PR_MD_CLOCK_INTERRUPT _MD_CLOCK_INTERRUPT
+#endif
+
+/* Stack debugging */
+NSPR_API(void) _PR_MD_INIT_STACK(PRThreadStack *ts, PRIntn redzone);
+#define    _PR_MD_INIT_STACK _MD_INIT_STACK
+
+NSPR_API(void) _PR_MD_CLEAR_STACK(PRThreadStack* ts);
+#define    _PR_MD_CLEAR_STACK _MD_CLEAR_STACK
+
+/* CPU related */
+NSPR_API(PRInt32) _PR_MD_GET_INTSOFF(void);
+#define    _PR_MD_GET_INTSOFF _MD_GET_INTSOFF
+
+NSPR_API(void) _PR_MD_SET_INTSOFF(PRInt32 _val);
+#define    _PR_MD_SET_INTSOFF _MD_SET_INTSOFF
+
+NSPR_API(_PRCPU*) _PR_MD_CURRENT_CPU(void);
+#define    _PR_MD_CURRENT_CPU _MD_CURRENT_CPU
+
+NSPR_API(void) _PR_MD_SET_CURRENT_CPU(_PRCPU *cpu);
+#define    _PR_MD_SET_CURRENT_CPU _MD_SET_CURRENT_CPU
+
+NSPR_API(void) _PR_MD_INIT_RUNNING_CPU(_PRCPU *cpu);
+#define    _PR_MD_INIT_RUNNING_CPU _MD_INIT_RUNNING_CPU
+
+/*
+ * Returns the number of threads awoken or 0 if a timeout occurred;
+ */
+extern PRInt32 _PR_MD_PAUSE_CPU(PRIntervalTime timeout);
+#define    _PR_MD_PAUSE_CPU _MD_PAUSE_CPU
+
+extern void _PR_MD_CLEANUP_BEFORE_EXIT(void);
+#define _PR_MD_CLEANUP_BEFORE_EXIT _MD_CLEANUP_BEFORE_EXIT
+
+extern void _PR_MD_EXIT(PRIntn status);
+#define    _PR_MD_EXIT _MD_EXIT
+
+/* Locks related */
+
+NSPR_API(void) _PR_MD_INIT_LOCKS(void);
+#define    _PR_MD_INIT_LOCKS _MD_INIT_LOCKS
+
+NSPR_API(PRStatus) _PR_MD_NEW_LOCK(_MDLock *md);
+#define    _PR_MD_NEW_LOCK _MD_NEW_LOCK
+
+NSPR_API(void) _PR_MD_FREE_LOCK(_MDLock *md);
+#define    _PR_MD_FREE_LOCK _MD_FREE_LOCK
+
+NSPR_API(void) _PR_MD_LOCK(_MDLock *md);
+#define    _PR_MD_LOCK _MD_LOCK
+
+/* Return 0 on success, a nonzero value on failure. */
+NSPR_API(PRIntn) _PR_MD_TEST_AND_LOCK(_MDLock *md);
+#define    _PR_MD_TEST_AND_LOCK _MD_TEST_AND_LOCK
+
+NSPR_API(void) _PR_MD_UNLOCK(_MDLock *md);
+#define    _PR_MD_UNLOCK _MD_UNLOCK
+
+NSPR_API(void) _PR_MD_IOQ_LOCK(void);
+#define    _PR_MD_IOQ_LOCK _MD_IOQ_LOCK
+
+NSPR_API(void) _PR_MD_IOQ_UNLOCK(void);
+#define    _PR_MD_IOQ_UNLOCK _MD_IOQ_UNLOCK
+
+#ifndef _PR_LOCAL_THREADS_ONLY /* not if only local threads supported */
+/* Semaphore related -- only for native threads */
+#ifdef HAVE_CVAR_BUILT_ON_SEM
+NSPR_API(void) _PR_MD_NEW_SEM(_MDSemaphore *md, PRUintn value);
+#define _PR_MD_NEW_SEM _MD_NEW_SEM
+
+NSPR_API(void) _PR_MD_DESTROY_SEM(_MDSemaphore *md);
+#define _PR_MD_DESTROY_SEM _MD_DESTROY_SEM
+
+NSPR_API(PRStatus) _PR_MD_TIMED_WAIT_SEM(
+    _MDSemaphore *md, PRIntervalTime timeout);
+#define _PR_MD_TIMED_WAIT_SEM _MD_TIMED_WAIT_SEM
+
+NSPR_API(PRStatus) _PR_MD_WAIT_SEM(_MDSemaphore *md);
+#define _PR_MD_WAIT_SEM _MD_WAIT_SEM
+
+NSPR_API(void) _PR_MD_POST_SEM(_MDSemaphore *md);
+#define _PR_MD_POST_SEM _MD_POST_SEM
+#endif /* HAVE_CVAR_BUILT_ON_SEM */
+
+#endif
+
+/* Condition Variables related -- only for native threads */
+
+#ifndef _PR_LOCAL_THREADS_ONLY /* not if only local threads supported */
+NSPR_API(PRInt32) _PR_MD_NEW_CV(_MDCVar *md);
+#define    _PR_MD_NEW_CV _MD_NEW_CV
+
+NSPR_API(void) _PR_MD_FREE_CV(_MDCVar *md);
+#define    _PR_MD_FREE_CV _MD_FREE_CV
+
+NSPR_API(void) _PR_MD_WAIT_CV(
+    _MDCVar *mdCVar,_MDLock *mdLock,PRIntervalTime timeout);
+#define    _PR_MD_WAIT_CV _MD_WAIT_CV
+
+NSPR_API(void) _PR_MD_NOTIFY_CV(_MDCVar *md, _MDLock *lock);
+#define    _PR_MD_NOTIFY_CV _MD_NOTIFY_CV
+
+NSPR_API(void) _PR_MD_NOTIFYALL_CV(_MDCVar *md, _MDLock *lock);
+#define    _PR_MD_NOTIFYALL_CV _MD_NOTIFYALL_CV
+#endif /* _PR_LOCAL_THREADS_ONLY */
+
+/* Threads related */
+NSPR_API(PRThread*) _PR_MD_CURRENT_THREAD(void);
+#define    _PR_MD_CURRENT_THREAD _MD_CURRENT_THREAD
+
+NSPR_API(PRThread*) _PR_MD_GET_ATTACHED_THREAD(void);
+#define    _PR_MD_GET_ATTACHED_THREAD _MD_GET_ATTACHED_THREAD
+
+NSPR_API(PRThread*) _PR_MD_LAST_THREAD(void);
+#define    _PR_MD_LAST_THREAD _MD_LAST_THREAD
+
+NSPR_API(void) _PR_MD_SET_CURRENT_THREAD(PRThread *thread);
+#define    _PR_MD_SET_CURRENT_THREAD _MD_SET_CURRENT_THREAD
+
+NSPR_API(void) _PR_MD_SET_LAST_THREAD(PRThread *thread);
+#define    _PR_MD_SET_LAST_THREAD _MD_SET_LAST_THREAD
+
+extern PRStatus _PR_MD_INIT_THREAD(PRThread *thread);
+#define    _PR_MD_INIT_THREAD _MD_INIT_THREAD
+
+extern void _PR_MD_EXIT_THREAD(PRThread *thread);
+#define    _PR_MD_EXIT_THREAD _MD_EXIT_THREAD
+
+#ifndef _PR_LOCAL_THREADS_ONLY /* not if only local threads supported */
+
+NSPR_API(PRStatus) _PR_MD_INIT_ATTACHED_THREAD(PRThread *thread);
+#define    _PR_MD_INIT_ATTACHED_THREAD _MD_INIT_ATTACHED_THREAD
+
+extern void _PR_MD_SUSPEND_THREAD(PRThread *thread);
+#define    _PR_MD_SUSPEND_THREAD _MD_SUSPEND_THREAD
+
+extern void _PR_MD_RESUME_THREAD(PRThread *thread);
+#define    _PR_MD_RESUME_THREAD _MD_RESUME_THREAD
+
+extern void _PR_MD_SUSPEND_CPU(_PRCPU  *cpu);
+#define    _PR_MD_SUSPEND_CPU _MD_SUSPEND_CPU
+
+extern void _PR_MD_RESUME_CPU(_PRCPU  *cpu);
+#define    _PR_MD_RESUME_CPU _MD_RESUME_CPU
+
+extern void _PR_MD_BEGIN_SUSPEND_ALL(void);
+#define    _PR_MD_BEGIN_SUSPEND_ALL _MD_BEGIN_SUSPEND_ALL
+
+extern void _PR_MD_END_SUSPEND_ALL(void);
+#define    _PR_MD_END_SUSPEND_ALL _MD_END_SUSPEND_ALL
+
+extern void _PR_MD_BEGIN_RESUME_ALL(void);
+#define    _PR_MD_BEGIN_RESUME_ALL _MD_BEGIN_RESUME_ALL
+
+extern void _PR_MD_END_RESUME_ALL(void);
+#define    _PR_MD_END_RESUME_ALL _MD_END_RESUME_ALL
+
+#endif        /* !_PR_LOCAL_THREADS_ONLY */
+
+extern void _PR_MD_CLEAN_THREAD(PRThread *thread);
+#define    _PR_MD_CLEAN_THREAD _MD_CLEAN_THREAD
+
+#ifdef HAVE_CUSTOM_USER_THREADS
+extern void _PR_MD_CREATE_PRIMORDIAL_USER_THREAD(PRThread *);
+#define    _PR_MD_CREATE_PRIMORDIAL_USER_THREAD _MD_CREATE_PRIMORDIAL_USER_THREAD
+
+extern PRThread* _PR_MD_CREATE_USER_THREAD(
+    PRUint32 stacksize,
+    void (*start)(void *),
+    void *arg);
+#define    _PR_MD_CREATE_USER_THREAD _MD_CREATE_USER_THREAD
+#endif
+
+extern PRStatus _PR_MD_CREATE_THREAD(
+    PRThread *thread,
+    void (*start) (void *),
+    PRThreadPriority priority,
+    PRThreadScope scope,
+    PRThreadState state,
+    PRUint32 stackSize);
+#define    _PR_MD_CREATE_THREAD _MD_CREATE_THREAD
+
+extern void _PR_MD_JOIN_THREAD(_MDThread *md);
+#define    _PR_MD_JOIN_THREAD _MD_JOIN_THREAD
+
+extern void _PR_MD_END_THREAD(void);
+#define    _PR_MD_END_THREAD _MD_END_THREAD
+
+extern void _PR_MD_YIELD(void);
+#define    _PR_MD_YIELD _MD_YIELD
+
+extern void _PR_MD_SET_PRIORITY(_MDThread *md, PRThreadPriority newPri);
+#define    _PR_MD_SET_PRIORITY _MD_SET_PRIORITY
+
+extern void _PR_MD_SET_CURRENT_THREAD_NAME(const char *name);
+#define    _PR_MD_SET_CURRENT_THREAD_NAME _MD_SET_CURRENT_THREAD_NAME
+
+NSPR_API(void) _PR_MD_SUSPENDALL(void);
+#define    _PR_MD_SUSPENDALL _MD_SUSPENDALL
+
+NSPR_API(void) _PR_MD_RESUMEALL(void);
+#define    _PR_MD_RESUMEALL _MD_RESUMEALL
+
+extern void _PR_MD_INIT_CONTEXT(
+    PRThread *thread, char *top, void (*start) (void), PRBool *status);
+#define    _PR_MD_INIT_CONTEXT _MD_INIT_CONTEXT
+
+extern void _PR_MD_SWITCH_CONTEXT(PRThread *thread);
+#define    _PR_MD_SWITCH_CONTEXT _MD_SWITCH_CONTEXT
+
+extern void _PR_MD_RESTORE_CONTEXT(PRThread *thread);
+#define    _PR_MD_RESTORE_CONTEXT _MD_RESTORE_CONTEXT
+
+/* Segment related */
+extern void _PR_MD_INIT_SEGS(void);
+#define    _PR_MD_INIT_SEGS _MD_INIT_SEGS
+
+extern PRStatus _PR_MD_ALLOC_SEGMENT(PRSegment *seg, PRUint32 size, void *vaddr);
+#define    _PR_MD_ALLOC_SEGMENT _MD_ALLOC_SEGMENT
+
+extern void _PR_MD_FREE_SEGMENT(PRSegment *seg);
+#define    _PR_MD_FREE_SEGMENT _MD_FREE_SEGMENT
+
+/* Directory enumeration related */
+extern PRStatus _PR_MD_OPEN_DIR(_MDDir *md,const char *name);
+#define    _PR_MD_OPEN_DIR _MD_OPEN_DIR
+
+extern char * _PR_MD_READ_DIR(_MDDir *md, PRIntn flags);
+#define    _PR_MD_READ_DIR _MD_READ_DIR
+
+extern PRInt32 _PR_MD_CLOSE_DIR(_MDDir *md);
+#define    _PR_MD_CLOSE_DIR _MD_CLOSE_DIR
+
+/* Named semaphores related */
+extern PRSem * _PR_MD_OPEN_SEMAPHORE(
+    const char *osname, PRIntn flags, PRIntn mode, PRUintn value);
+#define    _PR_MD_OPEN_SEMAPHORE _MD_OPEN_SEMAPHORE
+
+extern PRStatus _PR_MD_WAIT_SEMAPHORE(PRSem *sem);
+#define    _PR_MD_WAIT_SEMAPHORE _MD_WAIT_SEMAPHORE
+
+extern PRStatus _PR_MD_POST_SEMAPHORE(PRSem *sem);
+#define    _PR_MD_POST_SEMAPHORE _MD_POST_SEMAPHORE
+
+extern PRStatus _PR_MD_CLOSE_SEMAPHORE(PRSem *sem);
+#define    _PR_MD_CLOSE_SEMAPHORE _MD_CLOSE_SEMAPHORE
+
+extern PRStatus _PR_MD_DELETE_SEMAPHORE(const char *osname);
+#define    _PR_MD_DELETE_SEMAPHORE _MD_DELETE_SEMAPHORE
+
+/* I/O related */
+extern void _PR_MD_INIT_FILEDESC(PRFileDesc *fd);
+#define    _PR_MD_INIT_FILEDESC _MD_INIT_FILEDESC
+
+extern void _PR_MD_MAKE_NONBLOCK(PRFileDesc *fd);
+#define    _PR_MD_MAKE_NONBLOCK _MD_MAKE_NONBLOCK
+
+/* File I/O related */
+extern PROsfd _PR_MD_OPEN(const char *name, PRIntn osflags, PRIntn mode);
+#define    _PR_MD_OPEN _MD_OPEN
+
+extern PROsfd _PR_MD_OPEN_FILE(const char *name, PRIntn osflags, PRIntn mode);
+#define    _PR_MD_OPEN_FILE _MD_OPEN_FILE
+
+extern PRInt32 _PR_MD_CLOSE_FILE(PROsfd osfd);
+#define    _PR_MD_CLOSE_FILE _MD_CLOSE_FILE
+
+extern PRInt32 _PR_MD_READ(PRFileDesc *fd, void *buf, PRInt32 amount);
+#define    _PR_MD_READ _MD_READ
+
+extern PRInt32 _PR_MD_WRITE(PRFileDesc *fd, const void *buf, PRInt32 amount);
+#define    _PR_MD_WRITE _MD_WRITE
+
+extern PRInt32 _PR_MD_WRITEV(
+    PRFileDesc *fd, const struct PRIOVec *iov,
+    PRInt32 iov_size, PRIntervalTime timeout);
+#define    _PR_MD_WRITEV _MD_WRITEV
+
+extern PRInt32 _PR_MD_FSYNC(PRFileDesc *fd);
+#define    _PR_MD_FSYNC _MD_FSYNC
+
+extern PRInt32 _PR_MD_DELETE(const char *name);
+#define        _PR_MD_DELETE _MD_DELETE
+
+extern PRInt32 _PR_MD_RENAME(const char *from, const char *to);
+#define _PR_MD_RENAME _MD_RENAME
+
+extern PRInt32 _PR_MD_ACCESS(const char *name, PRAccessHow how);
+#define _PR_MD_ACCESS _MD_ACCESS
+
+extern PRInt32 _PR_MD_STAT(const char *name, struct stat *buf);
+#define _PR_MD_STAT _MD_STAT
+
+extern PRInt32 _PR_MD_MKDIR(const char *name, PRIntn mode);
+#define _PR_MD_MKDIR _MD_MKDIR
+
+extern PRInt32 _PR_MD_MAKE_DIR(const char *name, PRIntn mode);
+#define _PR_MD_MAKE_DIR _MD_MAKE_DIR
+
+extern PRInt32 _PR_MD_RMDIR(const char *name);
+#define _PR_MD_RMDIR _MD_RMDIR
+
+#ifdef MOZ_UNICODE
+/* UTF16 File I/O related */
+extern PRStatus _PR_MD_OPEN_DIR_UTF16(_MDDirUTF16 *md, const PRUnichar *name);
+#define    _PR_MD_OPEN_DIR_UTF16 _MD_OPEN_DIR_UTF16
+
+extern PROsfd _PR_MD_OPEN_FILE_UTF16(const PRUnichar *name, PRIntn osflags, PRIntn mode);
+#define    _PR_MD_OPEN_FILE_UTF16 _MD_OPEN_FILE_UTF16
+
+extern PRUnichar * _PR_MD_READ_DIR_UTF16(_MDDirUTF16 *md, PRIntn flags);
+#define    _PR_MD_READ_DIR_UTF16 _MD_READ_DIR_UTF16
+
+extern PRInt32 _PR_MD_CLOSE_DIR_UTF16(_MDDirUTF16 *md);
+#define    _PR_MD_CLOSE_DIR_UTF16 _MD_CLOSE_DIR_UTF16
+
+extern PRInt32 _PR_MD_GETFILEINFO64_UTF16(const PRUnichar *fn, PRFileInfo64 *info);
+#define _PR_MD_GETFILEINFO64_UTF16 _MD_GETFILEINFO64_UTF16
+#endif /* MOZ_UNICODE */
+
+/* Socket I/O related */
+extern void _PR_MD_INIT_IO(void);
+#define    _PR_MD_INIT_IO _MD_INIT_IO
+
+extern PRInt32 _PR_MD_CLOSE_SOCKET(PROsfd osfd);
+#define    _PR_MD_CLOSE_SOCKET _MD_CLOSE_SOCKET
+
+extern PRInt32 _PR_MD_CONNECT(
+    PRFileDesc *fd, const PRNetAddr *addr,
+    PRUint32 addrlen, PRIntervalTime timeout);
+#define    _PR_MD_CONNECT _MD_CONNECT
+
+extern PROsfd _PR_MD_ACCEPT(
+    PRFileDesc *fd, PRNetAddr *addr,
+    PRUint32 *addrlen, PRIntervalTime timeout);
+#define    _PR_MD_ACCEPT _MD_ACCEPT
+
+extern PRInt32 _PR_MD_BIND(PRFileDesc *fd, const PRNetAddr *addr, PRUint32 addrlen);
+#define    _PR_MD_BIND _MD_BIND
+
+extern PRInt32 _PR_MD_LISTEN(PRFileDesc *fd, PRIntn backlog);
+#define    _PR_MD_LISTEN _MD_LISTEN
+
+extern PRInt32 _PR_MD_SHUTDOWN(PRFileDesc *fd, PRIntn how);
+#define    _PR_MD_SHUTDOWN _MD_SHUTDOWN
+
+extern PRInt32 _PR_MD_RECV(PRFileDesc *fd, void *buf, PRInt32 amount,
+                           PRIntn flags, PRIntervalTime timeout);
+#define    _PR_MD_RECV _MD_RECV
+
+extern PRInt32 _PR_MD_SEND(
+    PRFileDesc *fd, const void *buf, PRInt32 amount, PRIntn flags,
+    PRIntervalTime timeout);
+#define    _PR_MD_SEND _MD_SEND
+
+extern PRInt32 _PR_MD_ACCEPT_READ(PRFileDesc *sd, PROsfd *newSock,
+                                  PRNetAddr **raddr, void *buf, PRInt32 amount,
+                                  PRIntervalTime timeout);
+#define _PR_MD_ACCEPT_READ _MD_ACCEPT_READ
+
+#ifdef WIN32
+extern PROsfd _PR_MD_FAST_ACCEPT(PRFileDesc *fd, PRNetAddr *addr,
+                                 PRUint32 *addrlen, PRIntervalTime timeout,
+                                 PRBool fast,
+                                 _PR_AcceptTimeoutCallback callback,
+                                 void *callbackArg);
+
+extern 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);
+
+extern void _PR_MD_UPDATE_ACCEPT_CONTEXT(PROsfd s, PROsfd ls);
+#define _PR_MD_UPDATE_ACCEPT_CONTEXT _MD_UPDATE_ACCEPT_CONTEXT
+/*
+ * The NSPR epoch (00:00:00 1 Jan 1970 UTC) in FILETIME.
+ * We store the value in a PRTime variable for convenience.
+ * This constant is used by _PR_FileTimeToPRTime().
+ * This is defined in ntmisc.c
+ */
+extern const PRTime _pr_filetime_offset;
+#endif /* WIN32 */
+
+extern PRInt32 _PR_MD_SENDFILE(
+    PRFileDesc *sock, PRSendFileData *sfd,
+    PRInt32 flags, PRIntervalTime timeout);
+#define _PR_MD_SENDFILE _MD_SENDFILE
+
+extern PRStatus _PR_MD_GETSOCKNAME(
+    PRFileDesc *fd, PRNetAddr *addr, PRUint32 *addrlen);
+#define    _PR_MD_GETSOCKNAME _MD_GETSOCKNAME
+
+extern PRStatus _PR_MD_GETPEERNAME(
+    PRFileDesc *fd, PRNetAddr *addr, PRUint32 *addrlen);
+#define    _PR_MD_GETPEERNAME _MD_GETPEERNAME
+
+extern PRStatus _PR_MD_GETSOCKOPT(
+    PRFileDesc *fd, PRInt32 level, PRInt32 optname, char* optval, PRInt32* optlen);
+#define    _PR_MD_GETSOCKOPT _MD_GETSOCKOPT
+
+extern PRStatus _PR_MD_SETSOCKOPT(
+    PRFileDesc *fd, PRInt32 level, PRInt32 optname,
+    const char* optval, PRInt32 optlen);
+#define    _PR_MD_SETSOCKOPT _MD_SETSOCKOPT
+
+extern PRStatus PR_CALLBACK _PR_SocketGetSocketOption(
+    PRFileDesc *fd, PRSocketOptionData *data);
+
+extern PRStatus PR_CALLBACK _PR_SocketSetSocketOption(
+    PRFileDesc *fd, const PRSocketOptionData *data);
+
+extern PRInt32 _PR_MD_RECVFROM(
+    PRFileDesc *fd, void *buf, PRInt32 amount, PRIntn flags,
+    PRNetAddr *addr, PRUint32 *addrlen, PRIntervalTime timeout);
+#define    _PR_MD_RECVFROM _MD_RECVFROM
+
+extern PRInt32 _PR_MD_SENDTO(
+    PRFileDesc *fd, const void *buf, PRInt32 amount, PRIntn flags,
+    const PRNetAddr *addr, PRUint32 addrlen, PRIntervalTime timeout);
+#define    _PR_MD_SENDTO _MD_SENDTO
+
+#if defined(_WIN64) && defined(WIN95)
+extern PRInt32 _PR_MD_TCPSENDTO(
+    PRFileDesc *fd, const void *buf, PRInt32 amount, PRIntn flags,
+    const PRNetAddr *addr, PRUint32 addrlen, PRIntervalTime timeout);
+#define    _PR_MD_TCPSENDTO _MD_TCPSENDTO
+#endif
+
+extern PRInt32 _PR_MD_SOCKETPAIR(int af, int type, int flags, PROsfd *osfd);
+#define    _PR_MD_SOCKETPAIR _MD_SOCKETPAIR
+
+extern PROsfd _PR_MD_SOCKET(int af, int type, int flags);
+#define    _PR_MD_SOCKET _MD_SOCKET
+
+extern PRInt32 _PR_MD_SOCKETAVAILABLE(PRFileDesc *fd);
+#define    _PR_MD_SOCKETAVAILABLE _MD_SOCKETAVAILABLE
+
+extern PRInt32 _PR_MD_PIPEAVAILABLE(PRFileDesc *fd);
+#define    _PR_MD_PIPEAVAILABLE _MD_PIPEAVAILABLE
+
+extern PRInt32 _PR_MD_PR_POLL(PRPollDesc *pds, PRIntn npds,
+                              PRIntervalTime timeout);
+#define    _PR_MD_PR_POLL _MD_PR_POLL
+
+/*
+ * Initialize fd->secret->inheritable for a newly created fd.
+ * If 'imported' is false, the osfd (i.e., fd->secret->md.osfd)
+ * was created by NSPR and hence has the OS-dependent default
+ * inheritable attribute.  If 'imported' is true, the osfd was
+ * not created by NSPR and hence a system call is required to
+ * query its inheritable attribute.  Since we may never need to
+ * know the inheritable attribute of a fd, a platform may choose
+ * to initialize fd->secret->inheritable of an imported fd to
+ * _PR_TRI_UNKNOWN and only pay the cost of the system call
+ * (in _PR_MD_QUERY_FD_INHERITABLE) when necessary.
+ */
+extern void _PR_MD_INIT_FD_INHERITABLE(PRFileDesc *fd, PRBool imported);
+#define    _PR_MD_INIT_FD_INHERITABLE _MD_INIT_FD_INHERITABLE
+
+extern PRStatus _PR_MD_SET_FD_INHERITABLE(PRFileDesc *fd, PRBool inheritable);
+#define    _PR_MD_SET_FD_INHERITABLE _MD_SET_FD_INHERITABLE
+
+
+#define _PR_PROCESS_TIMEOUT_INTERRUPT_ERRORS(me) \
+        if (_PR_PENDING_INTERRUPT(me)) { \
+                me->flags &= ~_PR_INTERRUPT; \
+                PR_SetError( PR_PENDING_INTERRUPT_ERROR, 0); \
+        } else { \
+                PR_SetError(PR_IO_TIMEOUT_ERROR, 0); \
+        }
+
+extern void *_PR_MD_GET_SP(PRThread *thread);
+#define    _PR_MD_GET_SP _MD_GET_SP
+
+#endif /* defined(_PR_PTHREADS) */
+
+/************************************************************************/
+/*************************************************************************
+** The remainder of the definitions are shared by pthreads and the classic
+** NSPR code. These too may be conditionalized.
+*************************************************************************/
+/************************************************************************/
+
+extern PROffset32 _PR_MD_LSEEK(PRFileDesc *fd, PROffset32 offset, PRSeekWhence whence);
+#define    _PR_MD_LSEEK _MD_LSEEK
+
+extern PROffset64 _PR_MD_LSEEK64(PRFileDesc *fd, PROffset64 offset, PRSeekWhence whence);
+#define    _PR_MD_LSEEK64 _MD_LSEEK64
+
+extern PRInt32 _PR_MD_GETFILEINFO(const char *fn, PRFileInfo *info);
+#define _PR_MD_GETFILEINFO _MD_GETFILEINFO
+
+extern PRInt32 _PR_MD_GETFILEINFO64(const char *fn, PRFileInfo64 *info);
+#define _PR_MD_GETFILEINFO64 _MD_GETFILEINFO64
+
+extern PRInt32 _PR_MD_GETOPENFILEINFO(const PRFileDesc *fd, PRFileInfo *info);
+#define _PR_MD_GETOPENFILEINFO _MD_GETOPENFILEINFO
+
+extern PRInt32 _PR_MD_GETOPENFILEINFO64(const PRFileDesc *fd, PRFileInfo64 *info);
+#define _PR_MD_GETOPENFILEINFO64 _MD_GETOPENFILEINFO64
+
+
+/*****************************************************************************/
+/************************** File descriptor caching **************************/
+/*****************************************************************************/
+extern void _PR_InitFdCache(void);
+extern void _PR_CleanupFdCache(void);
+extern PRFileDesc *_PR_Getfd(void);
+extern void _PR_Putfd(PRFileDesc *fd);
+
+/*
+ * These flags are used by NSPR temporarily in the poll
+ * descriptor's out_flags field to record the mapping of
+ * NSPR's poll flags to the system poll flags.
+ *
+ * If _PR_POLL_READ_SYS_WRITE bit is set, it means the
+ * PR_POLL_READ flag specified by the topmost layer is
+ * mapped to the WRITE flag at the system layer.  Similarly
+ * for the other three _PR_POLL_XXX_SYS_YYY flags.  It is
+ * assumed that the PR_POLL_EXCEPT flag doesn't get mapped
+ * to other flags.
+ */
+#define _PR_POLL_READ_SYS_READ     0x1
+#define _PR_POLL_READ_SYS_WRITE    0x2
+#define _PR_POLL_WRITE_SYS_READ    0x4
+#define _PR_POLL_WRITE_SYS_WRITE   0x8
+
+/*
+** These methods are coerced into file descriptor methods table
+** when the intended service is inappropriate for the particular
+** type of file descriptor.
+*/
+extern PRIntn _PR_InvalidInt(void);
+extern PRInt16 _PR_InvalidInt16(void);
+extern PRInt64 _PR_InvalidInt64(void);
+extern PRStatus _PR_InvalidStatus(void);
+extern PRFileDesc *_PR_InvalidDesc(void);
+
+extern PRIOMethods _pr_faulty_methods;
+
+/*
+** The PR_NETADDR_SIZE macro can only be called on a PRNetAddr union
+** whose 'family' field is set.  It returns the size of the union
+** member corresponding to the specified address family.
+*/
+
+extern PRUintn _PR_NetAddrSize(const PRNetAddr* addr);
+
+#if defined(_PR_INET6)
+
+#define PR_NETADDR_SIZE(_addr) _PR_NetAddrSize(_addr)
+
+#elif defined(_PR_HAVE_MD_SOCKADDR_IN6)
+
+/*
+** Under the following conditions:
+** 1. _PR_INET6 is not defined;
+** 2. _PR_INET6_PROBE is defined;
+** 3. struct sockaddr_in6 has nonstandard fields at the end
+**    (e.g., on Solaris 8),
+** (_addr)->ipv6 is smaller than struct sockaddr_in6, and
+** hence we can't pass sizeof((_addr)->ipv6) to socket
+** functions such as connect because they would fail with
+** EINVAL.
+**
+** To pass the correct socket address length to socket
+** functions, define the macro _PR_HAVE_MD_SOCKADDR_IN6 and
+** define struct _md_sockaddr_in6 to be isomorphic to
+** struct sockaddr_in6.
+*/
+
+#if defined(XP_UNIX) || defined(XP_OS2)
+#define PR_NETADDR_SIZE(_addr)                  \
+        ((_addr)->raw.family == PR_AF_INET      \
+        ? sizeof((_addr)->inet)                 \
+        : ((_addr)->raw.family == PR_AF_INET6   \
+        ? sizeof(struct _md_sockaddr_in6)       \
+        : sizeof((_addr)->local)))
+#else
+#define PR_NETADDR_SIZE(_addr)                  \
+        ((_addr)->raw.family == PR_AF_INET      \
+        ? sizeof((_addr)->inet)                 \
+        : sizeof(struct _md_sockaddr_in6))
+#endif /* defined(XP_UNIX) */
+
+#else
+
+#if defined(XP_UNIX) || defined(XP_OS2)
+#define PR_NETADDR_SIZE(_addr)                  \
+        ((_addr)->raw.family == PR_AF_INET      \
+        ? sizeof((_addr)->inet)                 \
+        : ((_addr)->raw.family == PR_AF_INET6   \
+        ? sizeof((_addr)->ipv6)                 \
+        : sizeof((_addr)->local)))
+#else
+#define PR_NETADDR_SIZE(_addr)                  \
+        ((_addr)->raw.family == PR_AF_INET      \
+        ? sizeof((_addr)->inet)                 \
+        : sizeof((_addr)->ipv6))
+#endif /* defined(XP_UNIX) */
+
+#endif /* defined(_PR_INET6) */
+
+extern PRStatus _PR_MapOptionName(
+    PRSockOption optname, PRInt32 *level, PRInt32 *name);
+extern void _PR_InitThreads(
+    PRThreadType type, PRThreadPriority priority, PRUintn maxPTDs);
+
+struct PRLock {
+#if defined(_PR_PTHREADS)
+    pthread_mutex_t mutex;          /* the underlying lock */
+    _PT_Notified notified;          /* array of conditions notified */
+    PRBool locked;                  /* whether the mutex is locked */
+    pthread_t owner;                /* if locked, current lock owner */
+#elif defined(_PR_BTHREADS)
+    sem_id  semaphoreID;        /* the underlying lock */
+    int32   benaphoreCount;     /* number of people in lock */
+    thread_id   owner;          /* current lock owner */
+#else /* not pthreads or Be threads */
+    PRCList links;                  /* linkage for PRThread.lockList */
+    struct PRThread *owner;         /* current lock owner */
+    PRCList waitQ;                  /* list of threads waiting for lock */
+    PRThreadPriority priority;      /* priority of lock */
+    PRThreadPriority boostPriority; /* boosted priority of lock owner */
+    _MDLock ilock;                  /* Internal Lock to protect user-level fields */
+#endif
+};
+
+struct PRCondVar {
+    PRLock *lock;               /* associated lock that protects the condition */
+#if defined(_PR_PTHREADS)
+    pthread_cond_t cv;          /* underlying pthreads condition */
+    PRInt32 notify_pending;     /* CV has destroy pending notification */
+#elif defined(_PR_BTHREADS)
+    sem_id    sem;              /* the underlying lock */
+    sem_id    handshakeSem;     /* the lock for 'notify'-threads waiting for confirmation */
+    sem_id    signalSem;        /* the lock for threads waiting for someone to notify */
+    volatile int32    nw;       /* the number waiting */
+    volatile int32    ns;       /* the number signalling */
+    long signalBenCount;        /* the number waiting on the underlying sem */
+#else /* not pthreads or Be threads */
+    PRCList condQ;              /* Condition variable wait Q */
+    _MDLock ilock;              /* Internal Lock to protect condQ */
+    _MDCVar md;
+#endif
+};
+
+/************************************************************************/
+
+struct PRMonitor {
+    const char* name;           /* monitor name for debugging */
+#if defined(_PR_PTHREADS)
+    pthread_mutex_t lock;       /* lock is only held when accessing fields
+                                 * of the PRMonitor, instead of being held
+                                 * while the monitor is entered. The only
+                                 * exception is notifyTimes, which is
+                                 * protected by the monitor. */
+    pthread_t owner;            /* the owner of the monitor or invalid */
+    pthread_cond_t entryCV;     /* for threads waiting to enter the monitor */
+
+    pthread_cond_t waitCV;      /* for threads waiting on the monitor */
+    PRInt32 refCount;           /* reference count, an atomic variable.
+                                 * PR_NewMonitor adds a reference to the
+                                 * newly created PRMonitor, and
+                                 * PR_DestroyMonitor releases that reference.
+                                 * PR_ExitMonitor adds a reference before
+                                 * unlocking the internal lock if it needs to
+                                 * signal entryCV, and releases the reference
+                                 * after signaling entryCV. */
+#else  /* defined(_PR_PTHREADS) */
+    PRLock lock;                /* lock is only held when accessing fields
+                                 * of the PRMonitor, instead of being held
+                                 * while the monitor is entered. The only
+                                 * exception is notifyTimes, which is
+                                 * protected by the monitor. */
+    PRThread *owner;            /* the owner of the monitor or invalid */
+    PRCondVar entryCV;          /* for threads waiting to enter the monitor */
+
+    PRCondVar waitCV;           /* for threads waiting on the monitor */
+#endif /* defined(_PR_PTHREADS) */
+    PRUint32 entryCount;        /* # of times re-entered */
+    PRIntn notifyTimes;         /* number of pending notifies for waitCV.
+                                 * The special value -1 means a broadcast
+                                 * (PR_NotifyAll). */
+};
+
+/************************************************************************/
+
+struct PRSemaphore {
+#if defined(_PR_BTHREADS)
+    sem_id  sem;
+    int32   benaphoreCount;
+#else
+    PRCondVar *cvar;        /* associated lock and condition variable queue */
+    PRUintn count;            /* the value of the counting semaphore */
+    PRUint32 waiters;            /* threads waiting on the semaphore */
+#if defined(_PR_PTHREADS)
+#else  /* defined(_PR_PTHREADS) */
+    _MDSemaphore md;
+#endif /* defined(_PR_PTHREADS) */
+#endif /* defined(_PR_BTHREADS) */
+};
+
+/*************************************************************************/
+
+struct PRSem {
+#ifdef _PR_HAVE_POSIX_SEMAPHORES
+    sem_t *sem;
+#elif defined(_PR_HAVE_SYSV_SEMAPHORES)
+    int semid;
+#elif defined(WIN32)
+    HANDLE sem;
+#else
+    PRInt8 notused;
+#endif
+};
+
+/*************************************************************************/
+
+struct PRStackStr {
+    /* head MUST be at offset 0; assembly language code relies on this */
+#if defined(AIX)
+    volatile PRStackElem prstk_head;
+#else
+    PRStackElem prstk_head;
+#endif
+
+    PRLock *prstk_lock;
+    char *prstk_name;
+};
+
+/************************************************************************/
+
+/* XXX this needs to be exported (sigh) */
+struct PRThreadStack {
+    PRCList links;
+    PRUintn flags;
+
+    char *allocBase;            /* base of stack's allocated memory */
+    PRUint32 allocSize;         /* size of stack's allocated memory */
+    char *stackBottom;          /* bottom of stack from C's point of view */
+    char *stackTop;             /* top of stack from C's point of view */
+    PRUint32 stackSize;         /* size of usable portion of the stack */
+
+    PRSegment *seg;
+    PRThread* thr;          /* back pointer to thread owning this stack */
+
+#if defined(_PR_PTHREADS)
+#else /* defined(_PR_PTHREADS) */
+    _MDThreadStack md;
+#endif /* defined(_PR_PTHREADS) */
+};
+
+extern void _PR_DestroyThreadPrivate(PRThread*);
+
+typedef void (PR_CALLBACK *_PRStartFn)(void *);
+
+struct PRThread {
+    PRUint32 state;                 /* thread's creation state */
+    PRThreadPriority priority;      /* apparent priority, loosly defined */
+
+    void *arg;                      /* argument to the client's entry point */
+    _PRStartFn startFunc;           /* the root of the client's thread */
+
+    PRThreadStack *stack;           /* info about thread's stack (for GC) */
+    void *environment;              /* pointer to execution environment */
+
+    PRThreadDumpProc dump;          /* dump thread info out */
+    void *dumpArg;                  /* argument for the dump function */
+
+    /*
+    ** Per thread private data
+    */
+    PRUint32 tpdLength;             /* thread's current vector length */
+    void **privateData;             /* private data vector or NULL */
+    PRErrorCode errorCode;          /* current NSPR error code | zero */
+    PRInt32 osErrorCode;            /* mapping of errorCode | zero */
+    PRIntn  errorStringLength;      /* textLength from last call to PR_SetErrorText() */
+    PRInt32 errorStringSize;        /* malloc()'d size of buffer | zero */
+    char *errorString;              /* current error string | NULL */
+    char *name;                     /* thread's name */
+
+#if defined(_PR_PTHREADS)
+    pthread_t id;                   /* pthread identifier for the thread */
+    PRBool idSet;                   /* whether 'id' has been set. Protected by
+                                     * pt_book.ml. */
+#ifdef _PR_NICE_PRIORITY_SCHEDULING
+    pid_t tid;                      /* Linux-specific kernel thread ID */
+#endif
+    PRBool okToDelete;              /* ok to delete the PRThread struct? */
+    PRCondVar *waiting;             /* where the thread is waiting | NULL */
+    void *sp;                       /* recorded sp for garbage collection */
+    PRThread *next, *prev;          /* simple linked list of all threads */
+    PRUint32 suspend;               /* used to store suspend and resume flags */
+#ifdef PT_NO_SIGTIMEDWAIT
+    pthread_mutex_t suspendResumeMutex;
+    pthread_cond_t suspendResumeCV;
+#endif
+    PRUint32 interrupt_blocked;     /* interrupt blocked */
+    struct pollfd *syspoll_list;    /* Unix polling list used by PR_Poll */
+    PRUint32 syspoll_count;         /* number of elements in syspoll_list */
+#if defined(_PR_POLL_WITH_SELECT)
+    int *selectfd_list;             /* Unix fd's that PR_Poll selects on */
+    PRUint32 selectfd_count;        /* number of elements in selectfd_list */
+#endif
+#elif defined(_PR_BTHREADS)
+    PRUint32 flags;
+    _MDThread md;
+    PRBool io_pending;
+    PRInt32 io_fd;
+    PRBool io_suspended;
+#else /* not pthreads or Be threads */
+    _MDLock threadLock;             /* Lock to protect thread state variables.
+                                     * Protects the following fields:
+                                     *     state
+                                     *     priority
+                                     *     links
+                                     *     wait
+                                     *     cpu
+                                     */
+    PRUint32 queueCount;
+    PRUint32 waitCount;
+
+    PRCList active;                 /* on list of all active threads        */
+    PRCList links;
+    PRCList waitQLinks;             /* when thread is PR_Wait'ing */
+    PRCList lockList;               /* list of locks currently holding */
+    PRIntervalTime sleep;           /* sleep time when thread is sleeping */
+    struct _wait {
+        struct PRLock *lock;
+        struct PRCondVar *cvar;
+    } wait;
+
+    PRUint32 id;
+    PRUint32 flags;
+    PRUint32 no_sched;              /* Don't schedule the thread to run.
+                                     * This flag has relevance only when
+                                     * multiple NSPR CPUs are created.
+                                     * When a thread is de-scheduled, there
+                                     * is a narrow window of time in which
+                                     * the thread is put on the run queue
+                                     * but the scheduler is actually using
+                                     * the stack of this thread.  It is safe
+                                     * to run this thread on a different CPU
+                                     * only when its stack is not in use on
+                                     * any other CPU.  The no_sched flag is
+                                     * set during this interval to prevent
+                                     * the thread from being scheduled on a
+                                     * different CPU.
+                                     */
+
+    /* thread termination condition variable for join */
+    PRCondVar *term;
+
+    _PRCPU *cpu;                    /* cpu to which this thread is bound    */
+    PRUint32 threadAllocatedOnStack;/* boolean */
+
+    /* When an async IO is in progress and a second async IO cannot be
+     * initiated, the io_pending flag is set to true.  Some platforms will
+     * not use the io_pending flag.  If the io_pending flag is true, then
+     * io_fd is the OS-file descriptor on which IO is pending.
+     */
+    PRBool io_pending;
+    PRInt32 io_fd;
+
+    /* If a timeout occurs or if an outstanding IO is interrupted and the
+     * OS doesn't support a real cancellation (NT or MAC), then the
+     * io_suspended flag will be set to true.  The thread will be resumed
+     * but may run into trouble issuing additional IOs until the io_pending
+     * flag can be cleared
+     */
+    PRBool io_suspended;
+
+    _MDThread md;
+#endif
+};
+
+struct PRProcessAttr {
+    PRFileDesc *stdinFd;
+    PRFileDesc *stdoutFd;
+    PRFileDesc *stderrFd;
+    char *currentDirectory;
+    char *fdInheritBuffer;
+    PRSize fdInheritBufferSize;
+    PRSize fdInheritBufferUsed;
+};
+
+struct PRProcess {
+    _MDProcess md;
+};
+
+struct PRFileMap {
+    PRFileDesc *fd;
+    PRFileMapProtect prot;
+    _MDFileMap md;
+};
+
+/************************************************************************/
+
+/*
+** File descriptors of the NSPR layer can be in one of the
+** following states (stored in the 'state' field of struct
+** PRFilePrivate):
+** - _PR_FILEDESC_OPEN: The OS fd is open.
+** - _PR_FILEDESC_CLOSED: The OS fd is closed.  The PRFileDesc
+**   is still open but is unusable.  The only operation allowed
+**   on the PRFileDesc is PR_Close().
+** - _PR_FILEDESC_FREED: The OS fd is closed and the PRFileDesc
+**   structure is freed.
+*/
+
+#define _PR_FILEDESC_OPEN       0xaaaaaaaa    /* 1010101... */
+#define _PR_FILEDESC_CLOSED     0x55555555    /* 0101010... */
+#define _PR_FILEDESC_FREED      0x11111111
+
+/*
+** A boolean type with an additional "unknown" state
+*/
+
+typedef enum {
+    _PR_TRI_TRUE = 1,
+    _PR_TRI_FALSE = 0,
+    _PR_TRI_UNKNOWN = -1
+} _PRTriStateBool;
+
+struct PRFilePrivate {
+    PRInt32 state;
+    PRBool nonblocking;
+    _PRTriStateBool inheritable;
+    PRFileDesc *next;
+    PRIntn lockCount;   /*   0: not locked
+                         *  -1: a native lockfile call is in progress
+                         * > 0: # times the file is locked */
+#ifdef _PR_HAVE_PEEK_BUFFER
+    char *peekBuffer;
+    PRInt32 peekBufSize;
+    PRInt32 peekBytes;
+#endif
+#if !defined(_PR_HAVE_O_APPEND)
+    PRBool  appendMode; /* Some platforms don't have O_APPEND or its
+                         * equivalent, so they have to seek to end of
+                         * file on write if the file was opened in
+                         * append mode.  See Bugzilla 4090, 276330. */
+#endif
+    _MDFileDesc md;
+#ifdef _PR_NEED_SECRET_AF
+    PRUint16 af;        /* If the platform's implementation of accept()
+                         * requires knowing the address family of the
+             * socket, we save the address family here. */
+#endif
+
+#if defined(_WIN64)
+    /* This is necessary for TCP Fast Open. TCP Fast Open in windows must
+     * use ConnectEx function which uses OVERLAPPED. TCPSendTo will call
+     * ConnectEx to send fast open data. If ConnectEx returns
+     * ERROR_IO_PENDING we need to save OVERLAPPED structure and we will
+     * use it in ConnectContinue to get the final result of ConnectEx.
+     */
+    PRBool alreadyConnected;
+    PRBool overlappedActive;
+    OVERLAPPED ol;
+#endif
+};
+
+#ifdef _WIN64
+#define PR_PRIdOSFD "lld"       /* for printing PROsfd */
+#define PR_PRIxOSFD "llx"
+#define PR_SCNdOSFD "lld"       /* for scanning PROsfd */
+#define PR_SCNxOSFD "llx"
+#else
+#define PR_PRIdOSFD "ld"        /* for printing PROsfd */
+#define PR_PRIxOSFD "lx"
+#define PR_SCNdOSFD "ld"        /* for scanning PROsfd */
+#define PR_SCNxOSFD "lx"
+#endif
+
+struct PRDir {
+    PRDirEntry d;
+    _MDDir md;
+};
+
+#ifdef MOZ_UNICODE
+struct PRDirUTF16 {
+    PRDirEntry d;
+    _MDDirUTF16 md;
+};
+#endif /* MOZ_UNICODE */
+
+extern void _PR_InitLocks(void);
+extern void _PR_InitSegs(void);
+extern void _PR_InitStacks(void);
+extern void _PR_InitTPD(void);
+extern void _PR_InitMem(void);
+extern void _PR_InitEnv(void);
+extern void _PR_InitCMon(void);
+extern void _PR_InitIO(void);
+extern void _PR_InitLog(void);
+extern void _PR_InitNet(void);
+extern void _PR_InitClock(void);
+extern void _PR_InitLinker(void);
+extern void _PR_InitAtomic(void);
+extern void _PR_InitCPUs(void);
+extern void _PR_InitDtoa(void);
+extern void _PR_InitTime(void);
+extern void _PR_InitMW(void);
+extern void _PR_InitRWLocks(void);
+extern void _PR_CleanupThread(PRThread *thread);
+extern void _PR_CleanupCallOnce(void);
+extern void _PR_CleanupMW(void);
+extern void _PR_CleanupTime(void);
+extern void _PR_CleanupDtoa(void);
+extern void _PR_ShutdownLinker(void);
+extern void _PR_CleanupEnv(void);
+extern void _PR_CleanupIO(void);
+extern void _PR_CleanupCMon(void);
+extern void _PR_CleanupNet(void);
+extern void _PR_CleanupLayerCache(void);
+extern void _PR_CleanupStacks(void);
+#ifdef WINNT
+extern void _PR_CleanupCPUs(void);
+#endif
+extern void _PR_CleanupThreads(void);
+extern void _PR_CleanupTPD(void);
+extern void _PR_Cleanup(void);
+extern void _PR_LogCleanup(void);
+extern void _PR_InitLayerCache(void);
+
+extern PRBool _pr_initialized;
+extern void _PR_ImplicitInitialization(void);
+extern PRBool _PR_Obsolete(const char *obsolete, const char *preferred);
+
+/************************************************************************/
+
+struct PRSegment {
+    void *vaddr;
+    PRUint32 size;
+    PRUintn flags;
+#if defined(_PR_PTHREADS)
+#else  /* defined(_PR_PTHREADS) */
+    _MDSegment md;
+#endif /* defined(_PR_PTHREADS) */
+};
+
+/* PRSegment.flags */
+#define _PR_SEG_VM    0x1
+
+/************************************************************************/
+
+extern PRInt32 _pr_pageSize;
+extern PRInt32 _pr_pageShift;
+
+extern PRLogModuleInfo *_pr_clock_lm;
+extern PRLogModuleInfo *_pr_cmon_lm;
+extern PRLogModuleInfo *_pr_io_lm;
+extern PRLogModuleInfo *_pr_cvar_lm;
+extern PRLogModuleInfo *_pr_mon_lm;
+extern PRLogModuleInfo *_pr_linker_lm;
+extern PRLogModuleInfo *_pr_sched_lm;
+extern PRLogModuleInfo *_pr_thread_lm;
+extern PRLogModuleInfo *_pr_gc_lm;
+
+extern PRFileDesc *_pr_stdin;
+extern PRFileDesc *_pr_stdout;
+extern PRFileDesc *_pr_stderr;
+
+/* Zone allocator */
+/*
+** The zone allocator code has hardcoded pthread types and
+** functions, so it can only be used in the pthreads version.
+** This can be fixed by replacing the hardcoded pthread types
+** and functions with macros that expand to the native thread
+** types and functions on each platform.
+*/
+#if defined(_PR_PTHREADS)
+#define _PR_ZONE_ALLOCATOR
+#endif
+
+#ifdef _PR_ZONE_ALLOCATOR
+extern void _PR_InitZones(void);
+extern void _PR_DestroyZones(void);
+#endif
+
+/* Overriding malloc, free, etc. */
+#if !defined(_PR_NO_PREEMPT) && defined(XP_UNIX) \
+        && !defined(_PR_PTHREADS) && !defined(_PR_GLOBAL_THREADS_ONLY) \
+        && !defined(PURIFY) \
+        && !defined(DARWIN) \
+        && !defined(QNX) \
+        && !(defined (UNIXWARE) && defined (USE_SVR4_THREADS))
+#define _PR_OVERRIDE_MALLOC
+#endif
+
+/*************************************************************************
+* External machine-dependent code provided by each OS.                     *                                                                     *
+*************************************************************************/
+
+/* Initialization related */
+extern void _PR_MD_EARLY_INIT(void);
+#define    _PR_MD_EARLY_INIT _MD_EARLY_INIT
+
+extern void _PR_MD_INTERVAL_INIT(void);
+#define    _PR_MD_INTERVAL_INIT _MD_INTERVAL_INIT
+
+NSPR_API(void) _PR_MD_FINAL_INIT(void);
+#define    _PR_MD_FINAL_INIT _MD_FINAL_INIT
+
+extern void _PR_MD_EARLY_CLEANUP(void);
+#define    _PR_MD_EARLY_CLEANUP _MD_EARLY_CLEANUP
+
+/* Process control */
+
+extern PRProcess * _PR_MD_CREATE_PROCESS(
+    const char *path,
+    char *const *argv,
+    char *const *envp,
+    const PRProcessAttr *attr);
+#define    _PR_MD_CREATE_PROCESS _MD_CREATE_PROCESS
+
+extern PRStatus _PR_MD_DETACH_PROCESS(PRProcess *process);
+#define    _PR_MD_DETACH_PROCESS _MD_DETACH_PROCESS
+
+extern PRStatus _PR_MD_WAIT_PROCESS(PRProcess *process, PRInt32 *exitCode);
+#define    _PR_MD_WAIT_PROCESS _MD_WAIT_PROCESS
+
+extern PRStatus _PR_MD_KILL_PROCESS(PRProcess *process);
+#define    _PR_MD_KILL_PROCESS _MD_KILL_PROCESS
+
+/* Current Time */
+NSPR_API(PRTime) _PR_MD_NOW(void);
+#define    _PR_MD_NOW _MD_NOW
+
+/* Environment related */
+extern char* _PR_MD_GET_ENV(const char *name);
+#define    _PR_MD_GET_ENV _MD_GET_ENV
+
+extern PRIntn _PR_MD_PUT_ENV(const char *name);
+#define    _PR_MD_PUT_ENV _MD_PUT_ENV
+
+/* Atomic operations */
+
+extern void _PR_MD_INIT_ATOMIC(void);
+#define    _PR_MD_INIT_ATOMIC _MD_INIT_ATOMIC
+
+extern PRInt32 _PR_MD_ATOMIC_INCREMENT(PRInt32 *);
+#define    _PR_MD_ATOMIC_INCREMENT _MD_ATOMIC_INCREMENT
+
+extern PRInt32 _PR_MD_ATOMIC_ADD(PRInt32 *, PRInt32);
+#define    _PR_MD_ATOMIC_ADD _MD_ATOMIC_ADD
+
+extern PRInt32 _PR_MD_ATOMIC_DECREMENT(PRInt32 *);
+#define    _PR_MD_ATOMIC_DECREMENT _MD_ATOMIC_DECREMENT
+
+extern PRInt32 _PR_MD_ATOMIC_SET(PRInt32 *, PRInt32);
+#define    _PR_MD_ATOMIC_SET _MD_ATOMIC_SET
+
+/* Garbage collection */
+
+/*
+** Save the registers that the GC would find interesting into the thread
+** "t". isCurrent will be non-zero if the thread state that is being
+** saved is the currently executing thread. Return the address of the
+** first register to be scanned as well as the number of registers to
+** scan in "np".
+**
+** If "isCurrent" is non-zero then it is allowed for the thread context
+** area to be used as scratch storage to hold just the registers
+** necessary for scanning.
+*/
+extern PRWord *_MD_HomeGCRegisters(PRThread *t, int isCurrent, int *np);
+
+/* Time intervals */
+
+extern PRIntervalTime _PR_MD_GET_INTERVAL(void);
+#define _PR_MD_GET_INTERVAL _MD_GET_INTERVAL
+
+extern PRIntervalTime _PR_MD_INTERVAL_PER_SEC(void);
+#define _PR_MD_INTERVAL_PER_SEC _MD_INTERVAL_PER_SEC
+
+/* Affinity masks */
+
+extern PRInt32 _PR_MD_SETTHREADAFFINITYMASK(PRThread *thread, PRUint32 mask );
+#define _PR_MD_SETTHREADAFFINITYMASK _MD_SETTHREADAFFINITYMASK
+
+extern PRInt32 _PR_MD_GETTHREADAFFINITYMASK(PRThread *thread, PRUint32 *mask);
+#define _PR_MD_GETTHREADAFFINITYMASK _MD_GETTHREADAFFINITYMASK
+
+/* File locking */
+
+extern PRStatus _PR_MD_LOCKFILE(PROsfd osfd);
+#define    _PR_MD_LOCKFILE _MD_LOCKFILE
+
+extern PRStatus _PR_MD_TLOCKFILE(PROsfd osfd);
+#define    _PR_MD_TLOCKFILE _MD_TLOCKFILE
+
+extern PRStatus _PR_MD_UNLOCKFILE(PROsfd osfd);
+#define    _PR_MD_UNLOCKFILE _MD_UNLOCKFILE
+
+/* Memory-mapped files */
+
+extern PRStatus _PR_MD_CREATE_FILE_MAP(PRFileMap *fmap, PRInt64 size);
+#define _PR_MD_CREATE_FILE_MAP _MD_CREATE_FILE_MAP
+
+extern PRInt32 _PR_MD_GET_MEM_MAP_ALIGNMENT(void);
+#define _PR_MD_GET_MEM_MAP_ALIGNMENT _MD_GET_MEM_MAP_ALIGNMENT
+
+extern void * _PR_MD_MEM_MAP(
+    PRFileMap *fmap,
+    PROffset64 offset,
+    PRUint32 len);
+#define _PR_MD_MEM_MAP _MD_MEM_MAP
+
+extern PRStatus _PR_MD_MEM_UNMAP(void *addr, PRUint32 size);
+#define _PR_MD_MEM_UNMAP _MD_MEM_UNMAP
+
+extern PRStatus _PR_MD_CLOSE_FILE_MAP(PRFileMap *fmap);
+#define _PR_MD_CLOSE_FILE_MAP _MD_CLOSE_FILE_MAP
+
+extern PRStatus _PR_MD_SYNC_MEM_MAP(
+    PRFileDesc *fd,
+    void *addr,
+    PRUint32 len);
+#define _PR_MD_SYNC_MEM_MAP _MD_SYNC_MEM_MAP
+
+/* Named Shared Memory */
+
+/*
+** Declare PRSharedMemory.
+*/
+struct PRSharedMemory
+{
+    char        *ipcname; /* after conversion to native */
+    PRSize      size;  /* from open */
+    PRIntn      mode;  /* from open */
+    PRIntn      flags; /* from open */
+#if defined(PR_HAVE_POSIX_NAMED_SHARED_MEMORY)
+    int         id;
+#elif defined(PR_HAVE_SYSV_NAMED_SHARED_MEMORY)
+    int         id;
+#elif defined(PR_HAVE_WIN32_NAMED_SHARED_MEMORY)
+    HANDLE      handle;
+#else
+    PRUint32    nothing; /* placeholder, nothing behind here */
+#endif
+    PRUint32    ident; /* guard word at end of struct */
+#define _PR_SHM_IDENT 0xdeadbad
+};
+
+extern PRSharedMemory * _MD_OpenSharedMemory(
+    const char *name,
+    PRSize      size,
+    PRIntn      flags,
+    PRIntn      mode
+);
+#define _PR_MD_OPEN_SHARED_MEMORY _MD_OpenSharedMemory
+
+extern void * _MD_AttachSharedMemory( PRSharedMemory *shm, PRIntn flags );
+#define _PR_MD_ATTACH_SHARED_MEMORY _MD_AttachSharedMemory
+
+extern PRStatus _MD_DetachSharedMemory( PRSharedMemory *shm, void *addr );
+#define _PR_MD_DETACH_SHARED_MEMORY _MD_DetachSharedMemory
+
+extern PRStatus _MD_CloseSharedMemory( PRSharedMemory *shm );
+#define _PR_MD_CLOSE_SHARED_MEMORY _MD_CloseSharedMemory
+
+extern PRStatus _MD_DeleteSharedMemory( const char *name );
+#define _PR_MD_DELETE_SHARED_MEMORY  _MD_DeleteSharedMemory
+
+extern PRFileMap* _md_OpenAnonFileMap(
+    const char *dirName,
+    PRSize      size,
+    PRFileMapProtect prot
+);
+#define _PR_MD_OPEN_ANON_FILE_MAP _md_OpenAnonFileMap
+
+extern PRStatus _md_ExportFileMapAsString(
+    PRFileMap *fm,
+    PRSize    bufSize,
+    char      *buf
+);
+#define _PR_MD_EXPORT_FILE_MAP_AS_STRING _md_ExportFileMapAsString
+
+extern PRFileMap * _md_ImportFileMapFromString(
+    const char *fmstring
+);
+#define _PR_MD_IMPORT_FILE_MAP_FROM_STRING _md_ImportFileMapFromString
+
+
+
+/* Interprocess communications (IPC) */
+
+/*
+ * The maximum length of an NSPR IPC name, including the
+ * terminating null byte.
+ */
+#define PR_IPC_NAME_SIZE 1024
+
+/*
+ * Types of NSPR IPC objects
+ */
+typedef enum {
+    _PRIPCSem,  /* semaphores */
+    _PRIPCShm   /* shared memory segments */
+} _PRIPCType;
+
+/*
+ * Make a native IPC name from an NSPR IPC name.
+ */
+extern PRStatus _PR_MakeNativeIPCName(
+    const char *name,  /* NSPR IPC name */
+    char *result,      /* result buffer */
+    PRIntn size,       /* size of result buffer */
+    _PRIPCType type    /* type of IPC object */
+);
+
+/* Socket call error code */
+
+NSPR_API(PRInt32) _PR_MD_GET_SOCKET_ERROR(void);
+#define    _PR_MD_GET_SOCKET_ERROR _MD_GET_SOCKET_ERROR
+
+/* Get name of current host */
+extern PRStatus _PR_MD_GETHOSTNAME(char *name, PRUint32 namelen);
+#define    _PR_MD_GETHOSTNAME _MD_GETHOSTNAME
+
+extern PRStatus _PR_MD_GETSYSINFO(PRSysInfo cmd, char *name, PRUint32 namelen);
+#define    _PR_MD_GETSYSINFO _MD_GETSYSINFO
+
+/* File descriptor inheritance */
+
+/*
+ * If fd->secret->inheritable is _PR_TRI_UNKNOWN and we need to
+ * know the inheritable attribute of the fd, call this function
+ * to find that out.  This typically requires a system call.
+ */
+extern void _PR_MD_QUERY_FD_INHERITABLE(PRFileDesc *fd);
+#define    _PR_MD_QUERY_FD_INHERITABLE _MD_QUERY_FD_INHERITABLE
+
+/* --- PR_GetRandomNoise() related things --- */
+
+extern PRSize _PR_MD_GetRandomNoise( void *buf, PRSize size );
+#define _PR_MD_GET_RANDOM_NOISE(buf,size) _PR_MD_GetRandomNoise((buf),(size))
+extern PRSize _pr_CopyLowBits( void *dest, PRSize dstlen, void *src, PRSize srclen );
+
+/* end PR_GetRandomNoise() related */
+
+#if defined(_WIN64) && defined(WIN95)
+typedef struct _PRFileDescList {
+    PRFileDesc *fd;
+    struct _PRFileDescList *next;
+} PRFileDescList;
+
+extern PRLock *_fd_waiting_for_overlapped_done_lock;
+extern PRFileDescList *_fd_waiting_for_overlapped_done;
+extern void CheckOverlappedPendingSocketsAreDone();
+#endif
+
+
+PR_END_EXTERN_C
+
+#endif /* primpl_h___ */
diff --git a/nsprpub/pr/include/private/prpriv.h b/nsprpub/pr/include/private/prpriv.h
new file mode 100644
index 0000000000..f45eee4752
--- /dev/null
+++ b/nsprpub/pr/include/private/prpriv.h
@@ -0,0 +1,16 @@
+/* -*- 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/. */
+
+#ifndef prpriv_h___
+#define prpriv_h___
+
+/*
+ * NSPR 2.0 Private API
+ */
+
+#include "private/pprio.h"
+#include "private/pprthred.h"
+
+#endif /* prpriv_h___ */