Delete bundled copy of NSS and replace with README.

nspr/pr/src/pthreads/ptthread.c

Index: nspr/pr/src/pthreads/ptthread.c
diff --git a/nspr/pr/src/pthreads/ptthread.c b/nspr/pr/src/pthreads/ptthread.c
deleted file mode 100644
index 9e12606ea3f4227943318fede21dc7799851e880..0000000000000000000000000000000000000000
--- a/nspr/pr/src/pthreads/ptthread.c
+++ /dev/null
@@ -1,1822 +0,0 @@
-/* -*- 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:            ptthread.c
-** Descritpion:        Implemenation for threds using pthreds
-** Exports:            ptthread.h
-*/
-
-#if defined(_PR_PTHREADS) || defined(_PR_DCETHREADS)
-
-#include "prlog.h"
-#include "primpl.h"
-#include "prpdce.h"
-
-#include <pthread.h>
-#include <unistd.h>
-#include <string.h>
-#include <signal.h>
-#include <dlfcn.h>
-
-#if defined(OPENBSD) || defined(FREEBSD) || defined(DRAGONFLY)
-#include <pthread_np.h>
-#endif
-
-#ifdef SYMBIAN
-/* In Open C sched_get_priority_min/max do not work properly, so we undefine
- * _POSIX_THREAD_PRIORITY_SCHEDULING here.
- */
-#undef _POSIX_THREAD_PRIORITY_SCHEDULING
-#endif
-
-#ifdef _PR_NICE_PRIORITY_SCHEDULING
-#undef _POSIX_THREAD_PRIORITY_SCHEDULING
-#include <sys/resource.h>
-#ifndef HAVE_GETTID
-#define gettid() (syscall(SYS_gettid))
-#endif
-#endif
-
-/*
- * Record whether or not we have the privilege to set the scheduling
- * policy and priority of threads.  0 means that privilege is available.
- * EPERM means that privilege is not available.
- */
-
-static PRIntn pt_schedpriv = 0;
-extern PRLock *_pr_sleeplock;
-
-static struct _PT_Bookeeping
-{
-    PRLock *ml;                 /* a lock to protect ourselves */
-    PRCondVar *cv;              /* used to signal global things */
-    PRInt32 system, user;       /* a count of the two different types */
-    PRUintn this_many;          /* number of threads allowed for exit */
-    pthread_key_t key;          /* thread private data key */
-    PRBool keyCreated;          /* whether 'key' should be deleted */
-    PRThread *first, *last;     /* list of threads we know about */
-#if defined(_PR_DCETHREADS) || _POSIX_THREAD_PRIORITY_SCHEDULING > 0
-    PRInt32 minPrio, maxPrio;   /* range of scheduling priorities */
-#endif
-} pt_book = {0};
-
-static void _pt_thread_death(void *arg);
-static void _pt_thread_death_internal(void *arg, PRBool callDestructors);
-static void init_pthread_gc_support(void);
-
-#if defined(_PR_DCETHREADS) || _POSIX_THREAD_PRIORITY_SCHEDULING > 0
-static PRIntn pt_PriorityMap(PRThreadPriority pri)
-{
-#ifdef NTO
-    /* This priority algorithm causes lots of problems on Neutrino
-     * for now I have just hard coded everything to run at priority 10
-     * until I can come up with a new algorithm.
-     *     Jerry.Kirk@Nexwarecorp.com
-     */
-    return 10;
-#else
-    return pt_book.minPrio +
-	    pri * (pt_book.maxPrio - pt_book.minPrio) / PR_PRIORITY_LAST;
-#endif
-}
-#elif defined(_PR_NICE_PRIORITY_SCHEDULING)
-/*
- * This functions maps higher priorities to lower nice values relative to the
- * nice value specified in the |nice| parameter. The corresponding relative
- * adjustments are:
- *
- * PR_PRIORITY_LOW    +1
- * PR_PRIORITY_NORMAL  0
- * PR_PRIORITY_HIGH   -1
- * PR_PRIORITY_URGENT -2
- */
-static int pt_RelativePriority(int nice, PRThreadPriority pri)
-{
-    return nice + (1 - pri);
-}
-#endif
-
-/*
-** Initialize a stack for a native pthread thread
-*/
-static void _PR_InitializeStack(PRThreadStack *ts)
-{
-    if( ts && (ts->stackTop == 0) ) {
-        ts->allocBase = (char *) &ts;
-        ts->allocSize = ts->stackSize;
-
-        /*
-        ** Setup stackTop and stackBottom values.
-        */
-#ifdef HAVE_STACK_GROWING_UP
-        ts->stackBottom = ts->allocBase + ts->stackSize;
-        ts->stackTop = ts->allocBase;
-#else
-        ts->stackTop    = ts->allocBase;
-        ts->stackBottom = ts->allocBase - ts->stackSize;
-#endif
-    }
-}
-
-static void *_pt_root(void *arg)
-{
-    PRIntn rv;
-    PRThread *thred = (PRThread*)arg;
-    PRBool detached = (thred->state & PT_THREAD_DETACHED) ? PR_TRUE : PR_FALSE;
-    pthread_t id = pthread_self();
-#ifdef _PR_NICE_PRIORITY_SCHEDULING
-    pid_t tid;
-#endif
-
-#ifdef _PR_NICE_PRIORITY_SCHEDULING
-    /*
-     * We need to know the kernel thread ID of each thread in order to
-     * set its nice value hence we do it here instead of at creation time.
-     */
-    tid = gettid();
-    errno = 0;
-    rv = getpriority(PRIO_PROCESS, 0);
-
-    /* If we cannot read the main thread's nice value don't try to change the
-     * new thread's nice value. */
-    if (errno == 0) {
-        setpriority(PRIO_PROCESS, tid,
-                    pt_RelativePriority(rv, thred->priority));
-    }
-#endif
-
-    /*
-    ** DCE Threads can't detach during creation, so do it late.
-    ** I would like to do it only here, but that doesn't seem
-    ** to work.
-    */
-#if defined(_PR_DCETHREADS)
-    if (detached)
-    {
-        /* pthread_detach() modifies its argument, so we must pass a copy */
-        pthread_t self = id;
-        rv = pthread_detach(&self);
-        PR_ASSERT(0 == rv);
-    }
-#endif /* defined(_PR_DCETHREADS) */
-
-    /* Set up the thread stack information */
-    _PR_InitializeStack(thred->stack);
-
-    /*
-     * Set within the current thread the pointer to our object.
-     * This object will be deleted when the thread termintates,
-     * whether in a join or detached (see _PR_InitThreads()).
-     */
-    rv = pthread_setspecific(pt_book.key, thred);
-    PR_ASSERT(0 == rv);
-
-    /* make the thread visible to the rest of the runtime */
-    PR_Lock(pt_book.ml);
-    /*
-     * Both the parent thread and this new thread set thred->id.
-     * The new thread must ensure that thred->id is set before
-     * it executes its startFunc.  The parent thread must ensure
-     * that thred->id is set before PR_CreateThread() returns.
-     * Both threads set thred->id while holding pt_book.ml and
-     * use thred->idSet to ensure thred->id is written only once.
-     */
-    if (!thred->idSet)
-    {
-        thred->id = id;
-        thred->idSet = PR_TRUE;
-    }
-    else
-    {
-        PR_ASSERT(pthread_equal(thred->id, id));
-    }
-
-#ifdef _PR_NICE_PRIORITY_SCHEDULING
-    thred->tid = tid;
-    PR_NotifyAllCondVar(pt_book.cv);
-#endif
-
-    /* If this is a GCABLE thread, set its state appropriately */
-    if (thred->suspend & PT_THREAD_SETGCABLE)
-	    thred->state |= PT_THREAD_GCABLE;
-    thred->suspend = 0;
-
-    thred->prev = pt_book.last;
-    if (pt_book.last)
-        pt_book.last->next = thred;
-    else
-        pt_book.first = thred;
-    thred->next = NULL;
-    pt_book.last = thred;
-    PR_Unlock(pt_book.ml);
-
-    thred->startFunc(thred->arg);  /* make visible to the client */
-
-    /* unhook the thread from the runtime */
-    PR_Lock(pt_book.ml);
-    /*
-     * At this moment, PR_CreateThread() may not have set thred->id yet.
-     * It is safe for a detached thread to free thred only after
-     * PR_CreateThread() has accessed thred->id and thred->idSet.
-     */
-    if (detached)
-    {
-        while (!thred->okToDelete)
-            PR_WaitCondVar(pt_book.cv, PR_INTERVAL_NO_TIMEOUT);
-    }
-
-    if (thred->state & PT_THREAD_SYSTEM)
-        pt_book.system -= 1;
-    else if (--pt_book.user == pt_book.this_many)
-        PR_NotifyAllCondVar(pt_book.cv);
-    if (NULL == thred->prev)
-        pt_book.first = thred->next;
-    else
-        thred->prev->next = thred->next;
-    if (NULL == thred->next)
-        pt_book.last = thred->prev;
-    else
-        thred->next->prev = thred->prev;
-    PR_Unlock(pt_book.ml);
-
-    /*
-    * Here we set the pthread's backpointer to the PRThread to NULL.
-    * Otherwise the destructor would get called eagerly as the thread
-    * returns to the pthread runtime. The joining thread would them be
-    * the proud possessor of a dangling reference. However, this is the
-    * last chance to delete the object if the thread is detached, so
-    * just let the destructor do the work.
-    */
-    if (PR_FALSE == detached)
-    {
-        /* Call TPD destructors on this thread. */
-        _PR_DestroyThreadPrivate(thred);
-        rv = pthread_setspecific(pt_book.key, NULL);
-        PR_ASSERT(0 == rv);
-    }
-
-    return NULL;
-}  /* _pt_root */
-
-static PRThread* pt_AttachThread(void)
-{
-    PRThread *thred = NULL;
-
-    /*
-     * NSPR must have been initialized when PR_AttachThread is called.
-     * We cannot have PR_AttachThread call implicit initialization
-     * because if multiple threads call PR_AttachThread simultaneously,
-     * NSPR may be initialized more than once.
-     * We can't call any function that calls PR_GetCurrentThread()
-     * either (e.g., PR_SetError()) as that will result in infinite
-     * recursion.
-     */
-    if (!_pr_initialized) return NULL;
-
-    /* PR_NEWZAP must not call PR_GetCurrentThread() */
-    thred = PR_NEWZAP(PRThread);
-    if (NULL != thred)
-    {
-        int rv;
-
-        thred->priority = PR_PRIORITY_NORMAL;
-        thred->id = pthread_self();
-        thred->idSet = PR_TRUE;
-#ifdef _PR_NICE_PRIORITY_SCHEDULING
-        thred->tid = gettid();
-#endif
-        rv = pthread_setspecific(pt_book.key, thred);
-        PR_ASSERT(0 == rv);
-
-        thred->state = PT_THREAD_GLOBAL | PT_THREAD_FOREIGN;
-        PR_Lock(pt_book.ml);
-
-        /* then put it into the list */
-        thred->prev = pt_book.last;
-        if (pt_book.last)
-            pt_book.last->next = thred;
-        else
-            pt_book.first = thred;
-        thred->next = NULL;
-        pt_book.last = thred;
-        PR_Unlock(pt_book.ml);
-
-    }
-    return thred;  /* may be NULL */
-}  /* pt_AttachThread */
-
-static PRThread* _PR_CreateThread(
-    PRThreadType type, void (*start)(void *arg),
-    void *arg, PRThreadPriority priority, PRThreadScope scope,
-    PRThreadState state, PRUint32 stackSize, PRBool isGCAble)
-{
-    int rv;
-    PRThread *thred;
-    pthread_attr_t tattr;
-
-    if (!_pr_initialized) _PR_ImplicitInitialization();
-
-    if ((PRIntn)PR_PRIORITY_FIRST > (PRIntn)priority)
-        priority = PR_PRIORITY_FIRST;
-    else if ((PRIntn)PR_PRIORITY_LAST < (PRIntn)priority)
-        priority = PR_PRIORITY_LAST;
-
-    rv = _PT_PTHREAD_ATTR_INIT(&tattr);
-    PR_ASSERT(0 == rv);
-
-    if (EPERM != pt_schedpriv)
-    {
-#if !defined(_PR_DCETHREADS) && _POSIX_THREAD_PRIORITY_SCHEDULING > 0
-        struct sched_param schedule;
-#endif
-
-#if _POSIX_THREAD_PRIORITY_SCHEDULING > 0
-        rv = pthread_attr_setinheritsched(&tattr, PTHREAD_EXPLICIT_SCHED);
-        PR_ASSERT(0 == rv);
-#endif
-
-        /* Use the default scheduling policy */
-
-#if defined(_PR_DCETHREADS)
-        rv = pthread_attr_setprio(&tattr, pt_PriorityMap(priority));
-        PR_ASSERT(0 == rv);
-#elif _POSIX_THREAD_PRIORITY_SCHEDULING > 0
-        rv = pthread_attr_getschedparam(&tattr, &schedule);
-        PR_ASSERT(0 == rv);
-        schedule.sched_priority = pt_PriorityMap(priority);
-        rv = pthread_attr_setschedparam(&tattr, &schedule);
-        PR_ASSERT(0 == rv);
-#ifdef NTO
-        rv = pthread_attr_setschedpolicy(&tattr, SCHED_RR); /* Round Robin */
-        PR_ASSERT(0 == rv);
-#endif
-#endif /* !defined(_PR_DCETHREADS) */
-    }
-
-    /*
-     * DCE threads can't set detach state before creating the thread.
-     * AIX can't set detach late. Why can't we all just get along?
-     */
-#if !defined(_PR_DCETHREADS)
-    rv = pthread_attr_setdetachstate(&tattr,
-        ((PR_JOINABLE_THREAD == state) ?
-            PTHREAD_CREATE_JOINABLE : PTHREAD_CREATE_DETACHED));
-    PR_ASSERT(0 == rv);
-#endif /* !defined(_PR_DCETHREADS) */
-
-    /*
-     * If stackSize is 0, we use the default pthread stack size.
-     */
-    if (stackSize)
-    {
-#ifdef _MD_MINIMUM_STACK_SIZE
-        if (stackSize < _MD_MINIMUM_STACK_SIZE)
-            stackSize = _MD_MINIMUM_STACK_SIZE;
-#endif
-        rv = pthread_attr_setstacksize(&tattr, stackSize);
-        PR_ASSERT(0 == rv);
-    }
-
-    thred = PR_NEWZAP(PRThread);
-    if (NULL == thred)
-    {
-        PR_SetError(PR_OUT_OF_MEMORY_ERROR, errno);
-        goto done;
-    }
-    else
-    {
-        pthread_t id;
-
-        thred->arg = arg;
-        thred->startFunc = start;
-        thred->priority = priority;
-        if (PR_UNJOINABLE_THREAD == state)
-            thred->state |= PT_THREAD_DETACHED;
-
-        if (PR_LOCAL_THREAD == scope)
-        	scope = PR_GLOBAL_THREAD;
-			
-        if (PR_GLOBAL_BOUND_THREAD == scope) {
-#if _POSIX_THREAD_PRIORITY_SCHEDULING > 0
-    		rv = pthread_attr_setscope(&tattr, PTHREAD_SCOPE_SYSTEM);
-			if (rv) {
-				/*
-				 * system scope not supported
-				 */
-        		scope = PR_GLOBAL_THREAD;
-				/*
-				 * reset scope
-				 */
-    			rv = pthread_attr_setscope(&tattr, PTHREAD_SCOPE_PROCESS);
-    			PR_ASSERT(0 == rv);
-			}
-#endif
-		}
-        if (PR_GLOBAL_THREAD == scope)
-            thred->state |= PT_THREAD_GLOBAL;
-        else if (PR_GLOBAL_BOUND_THREAD == scope)
-            thred->state |= (PT_THREAD_GLOBAL | PT_THREAD_BOUND);
-		else	/* force it global */
-            thred->state |= PT_THREAD_GLOBAL;
-        if (PR_SYSTEM_THREAD == type)
-            thred->state |= PT_THREAD_SYSTEM;
-
-        thred->suspend =(isGCAble) ? PT_THREAD_SETGCABLE : 0;
-
-        thred->stack = PR_NEWZAP(PRThreadStack);
-        if (thred->stack == NULL) {
-            PRIntn oserr = errno;
-            PR_Free(thred);  /* all that work ... poof! */
-            PR_SetError(PR_OUT_OF_MEMORY_ERROR, oserr);
-            thred = NULL;  /* and for what? */
-            goto done;
-        }
-        thred->stack->stackSize = stackSize;
-        thred->stack->thr = thred;
-
-#ifdef PT_NO_SIGTIMEDWAIT
-        pthread_mutex_init(&thred->suspendResumeMutex,NULL);
-        pthread_cond_init(&thred->suspendResumeCV,NULL);
-#endif
-
-        /* make the thread counted to the rest of the runtime */
-        PR_Lock(pt_book.ml);
-        if (PR_SYSTEM_THREAD == type)
-            pt_book.system += 1;
-        else pt_book.user += 1;
-        PR_Unlock(pt_book.ml);
-
-        /*
-         * We pass a pointer to a local copy (instead of thred->id)
-         * to pthread_create() because who knows what wacky things
-         * pthread_create() may be doing to its argument.
-         */
-        rv = _PT_PTHREAD_CREATE(&id, tattr, _pt_root, thred);
-
-#if !defined(_PR_DCETHREADS)
-        if (EPERM == rv)
-        {
-#if defined(IRIX)
-        	if (PR_GLOBAL_BOUND_THREAD == scope) {
-				/*
-				 * SCOPE_SYSTEM requires appropriate privilege
-				 * reset to process scope and try again
-				 */
-    			rv = pthread_attr_setscope(&tattr, PTHREAD_SCOPE_PROCESS);
-    			PR_ASSERT(0 == rv);
-            	thred->state &= ~PT_THREAD_BOUND;
-			}
-#else
-            /* Remember that we don't have thread scheduling privilege. */
-            pt_schedpriv = EPERM;
-            PR_LOG(_pr_thread_lm, PR_LOG_MIN,
-                ("_PR_CreateThread: no thread scheduling privilege"));
-            /* Try creating the thread again without setting priority. */
-#if _POSIX_THREAD_PRIORITY_SCHEDULING > 0
-            rv = pthread_attr_setinheritsched(&tattr, PTHREAD_INHERIT_SCHED);
-            PR_ASSERT(0 == rv);
-#endif
-#endif	/* IRIX */
-            rv = _PT_PTHREAD_CREATE(&id, tattr, _pt_root, thred);
-        }
-#endif
-
-        if (0 != rv)
-        {
-#if defined(_PR_DCETHREADS)
-            PRIntn oserr = errno;
-#else
-            PRIntn oserr = rv;
-#endif
-            PR_Lock(pt_book.ml);
-            if (thred->state & PT_THREAD_SYSTEM)
-                pt_book.system -= 1;
-            else if (--pt_book.user == pt_book.this_many)
-                PR_NotifyAllCondVar(pt_book.cv);
-            PR_Unlock(pt_book.ml);
-
-            PR_Free(thred->stack);
-            PR_Free(thred);  /* all that work ... poof! */
-            PR_SetError(PR_INSUFFICIENT_RESOURCES_ERROR, oserr);
-            thred = NULL;  /* and for what? */
-            goto done;
-        }
-
-        PR_Lock(pt_book.ml);
-        /*
-         * Both the parent thread and this new thread set thred->id.
-         * The parent thread must ensure that thred->id is set before
-         * PR_CreateThread() returns.  (See comments in _pt_root().)
-         */
-        if (!thred->idSet)
-        {
-            thred->id = id;
-            thred->idSet = PR_TRUE;
-        }
-        else
-        {
-            PR_ASSERT(pthread_equal(thred->id, id));
-        }
-
-        /*
-         * If the new thread is detached, tell it that PR_CreateThread() has
-         * accessed thred->id and thred->idSet so it's ok to delete thred.
-         */
-        if (PR_UNJOINABLE_THREAD == state)
-        {
-            thred->okToDelete = PR_TRUE;
-            PR_NotifyAllCondVar(pt_book.cv);
-        }
-        PR_Unlock(pt_book.ml);
-    }
-
-done:
-    rv = _PT_PTHREAD_ATTR_DESTROY(&tattr);
-    PR_ASSERT(0 == rv);
-
-    return thred;
-}  /* _PR_CreateThread */
-
-PR_IMPLEMENT(PRThread*) PR_CreateThread(
-    PRThreadType type, void (*start)(void *arg), void *arg,
-    PRThreadPriority priority, PRThreadScope scope,
-    PRThreadState state, PRUint32 stackSize)
-{
-    return _PR_CreateThread(
-        type, start, arg, priority, scope, state, stackSize, PR_FALSE);
-} /* PR_CreateThread */
-
-PR_IMPLEMENT(PRThread*) PR_CreateThreadGCAble(
-    PRThreadType type, void (*start)(void *arg), void *arg, 
-    PRThreadPriority priority, PRThreadScope scope,
-    PRThreadState state, PRUint32 stackSize)
-{
-    return _PR_CreateThread(
-        type, start, arg, priority, scope, state, stackSize, PR_TRUE);
-}  /* PR_CreateThreadGCAble */
-
-PR_IMPLEMENT(void*) GetExecutionEnvironment(PRThread *thred)
-{
-    return thred->environment;
-}  /* GetExecutionEnvironment */
- 
-PR_IMPLEMENT(void) SetExecutionEnvironment(PRThread *thred, void *env)
-{
-    thred->environment = env;
-}  /* SetExecutionEnvironment */
-
-PR_IMPLEMENT(PRThread*) PR_AttachThread(
-    PRThreadType type, PRThreadPriority priority, PRThreadStack *stack)
-{
-    return PR_GetCurrentThread();
-}  /* PR_AttachThread */
-
-
-PR_IMPLEMENT(PRStatus) PR_JoinThread(PRThread *thred)
-{
-    int rv = -1;
-    void *result = NULL;
-    PR_ASSERT(thred != NULL);
-
-    if ((0xafafafaf == thred->state)
-    || (PT_THREAD_DETACHED == (PT_THREAD_DETACHED & thred->state))
-    || (PT_THREAD_FOREIGN == (PT_THREAD_FOREIGN & thred->state)))
-    {
-        /*
-         * This might be a bad address, but if it isn't, the state should
-         * either be an unjoinable thread or it's already had the object
-         * deleted. However, the client that called join on a detached
-         * thread deserves all the rath I can muster....
-         */
-        PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0);
-        PR_LogPrint(
-            "PR_JoinThread: %p not joinable | already smashed\n", thred);
-    }
-    else
-    {
-        pthread_t id = thred->id;
-        rv = pthread_join(id, &result);
-        PR_ASSERT(rv == 0 && result == NULL);
-        if (0 == rv)
-        {
-#ifdef _PR_DCETHREADS
-            rv = pthread_detach(&id);
-            PR_ASSERT(0 == rv);
-#endif
-            /*
-             * PR_FALSE, because the thread already called the TPD
-             * destructors before exiting _pt_root.
-             */
-            _pt_thread_death_internal(thred, PR_FALSE);
-        }
-        else
-        {
-            PRErrorCode prerror;
-            switch (rv)
-            {
-                case EINVAL:  /* not a joinable thread */
-                case ESRCH:   /* no thread with given ID */
-                    prerror = PR_INVALID_ARGUMENT_ERROR;
-                    break;
-                case EDEADLK: /* a thread joining with itself */
-                    prerror = PR_DEADLOCK_ERROR;
-                    break;
-                default:
-                    prerror = PR_UNKNOWN_ERROR;
-                    break;
-            }
-            PR_SetError(prerror, rv);
-        }
-    }
-    return (0 == rv) ? PR_SUCCESS : PR_FAILURE;
-}  /* PR_JoinThread */
-
-PR_IMPLEMENT(void) PR_DetachThread(void)
-{
-    void *thred;
-    int rv;
-
-    _PT_PTHREAD_GETSPECIFIC(pt_book.key, thred);
-    if (NULL == thred) return;
-    _pt_thread_death(thred);
-    rv = pthread_setspecific(pt_book.key, NULL);
-    PR_ASSERT(0 == rv);
-}  /* PR_DetachThread */
-
-PR_IMPLEMENT(PRThread*) PR_GetCurrentThread(void)
-{
-    void *thred;
-
-    if (!_pr_initialized) _PR_ImplicitInitialization();
-
-    _PT_PTHREAD_GETSPECIFIC(pt_book.key, thred);
-    if (NULL == thred) thred = pt_AttachThread();
-    PR_ASSERT(NULL != thred);
-    return (PRThread*)thred;
-}  /* PR_GetCurrentThread */
-
-PR_IMPLEMENT(PRThreadScope) PR_GetThreadScope(const PRThread *thred)
-{
-    return (thred->state & PT_THREAD_BOUND) ?
-        PR_GLOBAL_BOUND_THREAD : PR_GLOBAL_THREAD;
-}  /* PR_GetThreadScope() */
-
-PR_IMPLEMENT(PRThreadType) PR_GetThreadType(const PRThread *thred)
-{
-    return (thred->state & PT_THREAD_SYSTEM) ?
-        PR_SYSTEM_THREAD : PR_USER_THREAD;
-}
-
-PR_IMPLEMENT(PRThreadState) PR_GetThreadState(const PRThread *thred)
-{
-    return (thred->state & PT_THREAD_DETACHED) ?
-        PR_UNJOINABLE_THREAD : PR_JOINABLE_THREAD;
-}  /* PR_GetThreadState */
-
-PR_IMPLEMENT(PRThreadPriority) PR_GetThreadPriority(const PRThread *thred)
-{
-    PR_ASSERT(thred != NULL);
-    return thred->priority;
-}  /* PR_GetThreadPriority */
-
-PR_IMPLEMENT(void) PR_SetThreadPriority(PRThread *thred, PRThreadPriority newPri)
-{
-    PRIntn rv;
-
-    PR_ASSERT(NULL != thred);
-
-    if ((PRIntn)PR_PRIORITY_FIRST > (PRIntn)newPri)
-        newPri = PR_PRIORITY_FIRST;
-    else if ((PRIntn)PR_PRIORITY_LAST < (PRIntn)newPri)
-        newPri = PR_PRIORITY_LAST;
-
-#if defined(_PR_DCETHREADS)
-    rv = pthread_setprio(thred->id, pt_PriorityMap(newPri));
-    /* pthread_setprio returns the old priority */
-#elif _POSIX_THREAD_PRIORITY_SCHEDULING > 0
-    if (EPERM != pt_schedpriv)
-    {
-        int policy;
-        struct sched_param schedule;
-
-        rv = pthread_getschedparam(thred->id, &policy, &schedule);
-        if(0 == rv) {
-			schedule.sched_priority = pt_PriorityMap(newPri);
-			rv = pthread_setschedparam(thred->id, policy, &schedule);
-			if (EPERM == rv)
-			{
-				pt_schedpriv = EPERM;
-				PR_LOG(_pr_thread_lm, PR_LOG_MIN,
-					("PR_SetThreadPriority: no thread scheduling privilege"));
-			}
-		}
-		if (rv != 0)
-			rv = -1;
-    }
-#elif defined(_PR_NICE_PRIORITY_SCHEDULING)
-    PR_Lock(pt_book.ml);
-    while (thred->tid == 0)
-        PR_WaitCondVar(pt_book.cv, PR_INTERVAL_NO_TIMEOUT);
-    PR_Unlock(pt_book.ml);
-
-    errno = 0;
-    rv = getpriority(PRIO_PROCESS, 0);
-
-    /* Do not proceed unless we know the main thread's nice value. */
-    if (errno == 0) {
-        rv = setpriority(PRIO_PROCESS, thred->tid,
-                         pt_RelativePriority(rv, newPri));
-
-        if (rv == -1)
-        {
-            /* We don't set pt_schedpriv to EPERM in case errno == EPERM
-             * because adjusting the nice value might be permitted for certain
-             * ranges but not for others. */
-            PR_LOG(_pr_thread_lm, PR_LOG_MIN,
-                ("PR_SetThreadPriority: setpriority failed with error %d",
-                 errno));
-        }
-    }
-#else
-    (void)rv; /* rv is unused */
-#endif
-
-    thred->priority = newPri;
-}  /* PR_SetThreadPriority */
-
-PR_IMPLEMENT(PRStatus) PR_Interrupt(PRThread *thred)
-{
-    /*
-    ** If the target thread indicates that it's waiting,
-    ** find the condition and broadcast to it. Broadcast
-    ** since we don't know which thread (if there are more
-    ** than one). This sounds risky, but clients must
-    ** test their invariants when resumed from a wait and
-    ** I don't expect very many threads to be waiting on
-    ** a single condition and I don't expect interrupt to
-    ** be used very often.
-    **
-    ** I don't know why I thought this would work. Must have
-    ** been one of those weaker momements after I'd been
-    ** smelling the vapors.
-    **
-    ** Even with the followng changes it is possible that
-    ** the pointer to the condition variable is pointing
-    ** at a bogus value. Will the unerlying code detect
-    ** that?
-    */
-    PRCondVar *cv;
-    PR_ASSERT(NULL != thred);
-    if (NULL == thred) return PR_FAILURE;
-
-    thred->state |= PT_THREAD_ABORTED;
-
-    cv = thred->waiting;
-    if ((NULL != cv) && !thred->interrupt_blocked)
-    {
-        PRIntn rv;
-        (void)PR_ATOMIC_INCREMENT(&cv->notify_pending);
-        rv = pthread_cond_broadcast(&cv->cv);
-        PR_ASSERT(0 == rv);
-        if (0 > PR_ATOMIC_DECREMENT(&cv->notify_pending))
-            PR_DestroyCondVar(cv);
-    }
-    return PR_SUCCESS;
-}  /* PR_Interrupt */
-
-PR_IMPLEMENT(void) PR_ClearInterrupt(void)
-{
-    PRThread *me = PR_GetCurrentThread();
-    me->state &= ~PT_THREAD_ABORTED;
-}  /* PR_ClearInterrupt */
-
-PR_IMPLEMENT(void) PR_BlockInterrupt(void)
-{
-    PRThread *me = PR_GetCurrentThread();
-    _PT_THREAD_BLOCK_INTERRUPT(me);
-}  /* PR_BlockInterrupt */
-
-PR_IMPLEMENT(void) PR_UnblockInterrupt(void)
-{
-    PRThread *me = PR_GetCurrentThread();
-    _PT_THREAD_UNBLOCK_INTERRUPT(me);
-}  /* PR_UnblockInterrupt */
-
-PR_IMPLEMENT(PRStatus) PR_Yield(void)
-{
-    static PRBool warning = PR_TRUE;
-    if (warning) warning = _PR_Obsolete(
-        "PR_Yield()", "PR_Sleep(PR_INTERVAL_NO_WAIT)");
-    return PR_Sleep(PR_INTERVAL_NO_WAIT);
-}
-
-PR_IMPLEMENT(PRStatus) PR_Sleep(PRIntervalTime ticks)
-{
-    PRStatus rv = PR_SUCCESS;
-
-    if (!_pr_initialized) _PR_ImplicitInitialization();
-
-    if (PR_INTERVAL_NO_WAIT == ticks)
-    {
-        _PT_PTHREAD_YIELD();
-    }
-    else
-    {
-        PRCondVar *cv;
-        PRIntervalTime timein;
-
-        timein = PR_IntervalNow();
-        cv = PR_NewCondVar(_pr_sleeplock);
-        PR_ASSERT(cv != NULL);
-        PR_Lock(_pr_sleeplock);
-        do
-        {
-            PRIntervalTime now = PR_IntervalNow();
-            PRIntervalTime delta = now - timein;
-            if (delta > ticks) break;
-            rv = PR_WaitCondVar(cv, ticks - delta);
-        } while (PR_SUCCESS == rv);
-        PR_Unlock(_pr_sleeplock);
-        PR_DestroyCondVar(cv);
-    }
-    return rv;
-}  /* PR_Sleep */
-
-static void _pt_thread_death(void *arg)
-{
-    void *thred;
-    int rv;
-
-    _PT_PTHREAD_GETSPECIFIC(pt_book.key, thred);
-    if (NULL == thred)
-    {
-        /*
-         * Have PR_GetCurrentThread return the expected value to the
-         * destructors.
-         */
-        rv = pthread_setspecific(pt_book.key, arg);
-        PR_ASSERT(0 == rv);
-    }
-
-    /* PR_TRUE for: call destructors */ 
-    _pt_thread_death_internal(arg, PR_TRUE);
-
-    if (NULL == thred)
-    {
-        rv = pthread_setspecific(pt_book.key, NULL);
-        PR_ASSERT(0 == rv);
-    }
-}
-
-static void _pt_thread_death_internal(void *arg, PRBool callDestructors)
-{
-    PRThread *thred = (PRThread*)arg;
-
-    if (thred->state & (PT_THREAD_FOREIGN|PT_THREAD_PRIMORD))
-    {
-        PR_Lock(pt_book.ml);
-        if (NULL == thred->prev)
-            pt_book.first = thred->next;
-        else
-            thred->prev->next = thred->next;
-        if (NULL == thred->next)
-            pt_book.last = thred->prev;
-        else
-            thred->next->prev = thred->prev;
-        PR_Unlock(pt_book.ml);
-    }
-    if (callDestructors)
-        _PR_DestroyThreadPrivate(thred);
-    PR_Free(thred->privateData);
-    if (NULL != thred->errorString)
-        PR_Free(thred->errorString);
-    if (NULL != thred->name)
-        PR_Free(thred->name);
-    PR_Free(thred->stack);
-    if (NULL != thred->syspoll_list)
-        PR_Free(thred->syspoll_list);
-#if defined(_PR_POLL_WITH_SELECT)
-    if (NULL != thred->selectfd_list)
-        PR_Free(thred->selectfd_list);
-#endif
-#if defined(DEBUG)
-    memset(thred, 0xaf, sizeof(PRThread));
-#endif /* defined(DEBUG) */
-    PR_Free(thred);
-}  /* _pt_thread_death */
-
-void _PR_InitThreads(
-    PRThreadType type, PRThreadPriority priority, PRUintn maxPTDs)
-{
-    int rv;
-    PRThread *thred;
-
-    PR_ASSERT(priority == PR_PRIORITY_NORMAL);
-
-#ifdef _PR_NEED_PTHREAD_INIT
-    /*
-     * On BSD/OS (3.1 and 4.0), the pthread subsystem is lazily
-     * initialized, but pthread_self() fails to initialize
-     * pthreads and hence returns a null thread ID if invoked
-     * by the primordial thread before any other pthread call.
-     * So we explicitly initialize pthreads here.
-     */
-    pthread_init();
-#endif
-
-#if defined(_PR_DCETHREADS) || _POSIX_THREAD_PRIORITY_SCHEDULING > 0
-#if defined(FREEBSD)
-    {
-    pthread_attr_t attr;
-    int policy;
-    /* get the min and max priorities of the default policy */
-    pthread_attr_init(&attr);
-    pthread_attr_setinheritsched(&attr, PTHREAD_EXPLICIT_SCHED);
-    pthread_attr_getschedpolicy(&attr, &policy);
-    pt_book.minPrio = sched_get_priority_min(policy);
-    PR_ASSERT(-1 != pt_book.minPrio);
-    pt_book.maxPrio = sched_get_priority_max(policy);
-    PR_ASSERT(-1 != pt_book.maxPrio);
-    pthread_attr_destroy(&attr);
-    }
-#else
-    /*
-    ** These might be function evaluations
-    */
-    pt_book.minPrio = PT_PRIO_MIN;
-    pt_book.maxPrio = PT_PRIO_MAX;
-#endif
-#endif
-    
-    PR_ASSERT(NULL == pt_book.ml);
-    pt_book.ml = PR_NewLock();
-    PR_ASSERT(NULL != pt_book.ml);
-    pt_book.cv = PR_NewCondVar(pt_book.ml);
-    PR_ASSERT(NULL != pt_book.cv);
-    thred = PR_NEWZAP(PRThread);
-    PR_ASSERT(NULL != thred);
-    thred->arg = NULL;
-    thred->startFunc = NULL;
-    thred->priority = priority;
-    thred->id = pthread_self();
-    thred->idSet = PR_TRUE;
-#ifdef _PR_NICE_PRIORITY_SCHEDULING
-    thred->tid = gettid();
-#endif
-
-    thred->state = (PT_THREAD_DETACHED | PT_THREAD_PRIMORD);
-    if (PR_SYSTEM_THREAD == type)
-    {
-        thred->state |= PT_THREAD_SYSTEM;
-        pt_book.system += 1;
-	    pt_book.this_many = 0;
-    }
-    else
-    {
-	    pt_book.user += 1;
-	    pt_book.this_many = 1;
-    }
-    thred->next = thred->prev = NULL;
-    pt_book.first = pt_book.last = thred;
-
-    thred->stack = PR_NEWZAP(PRThreadStack);
-    PR_ASSERT(thred->stack != NULL);
-    thred->stack->stackSize = 0;
-    thred->stack->thr = thred;
-	_PR_InitializeStack(thred->stack);
-
-    /*
-     * Create a key for our use to store a backpointer in the pthread
-     * to our PRThread object. This object gets deleted when the thread
-     * returns from its root in the case of a detached thread. Other
-     * threads delete the objects in Join.
-     *
-     * NB: The destructor logic seems to have a bug so it isn't used.
-     * NBB: Oh really? I'm going to give it a spin - AOF 19 June 1998.
-     * More info - the problem is that pthreads calls the destructor
-     * eagerly as the thread returns from its root, rather than lazily
-     * after the thread is joined. Therefore, threads that are joining
-     * and holding PRThread references are actually holding pointers to
-     * nothing.
-     */
-    rv = _PT_PTHREAD_KEY_CREATE(&pt_book.key, _pt_thread_death);
-    if (0 != rv)
-        PR_Assert("0 == rv", __FILE__, __LINE__);
-    pt_book.keyCreated = PR_TRUE;
-    rv = pthread_setspecific(pt_book.key, thred);
-    PR_ASSERT(0 == rv);
-}  /* _PR_InitThreads */
-
-#ifdef __GNUC__
-/*
- * GCC supports the constructor and destructor attributes as of
- * version 2.5.
- */
-static void _PR_Fini(void) __attribute__ ((destructor));
-#elif defined(__SUNPRO_C)
-/*
- * Sun Studio compiler
- */
-#pragma fini(_PR_Fini)
-static void _PR_Fini(void);
-#elif defined(HPUX)
-/*
- * Current versions of HP C compiler define __HP_cc.
- * HP C compiler A.11.01.20 doesn't define __HP_cc.
- */
-#if defined(__ia64) || defined(_LP64)
-#pragma FINI "_PR_Fini"
-static void _PR_Fini(void);
-#else
-/*
- * Only HP-UX 10.x style initializers are supported in 32-bit links.
- * Need to use the +I PR_HPUX10xInit linker option.
- */
-#include <dl.h>
-
-static void _PR_Fini(void);
-
-void PR_HPUX10xInit(shl_t handle, int loading)
-{
-    /*
-     * This function is called when a shared library is loaded as well
-     * as when the shared library is unloaded.  Note that it may not
-     * be called when the user's program terminates.
-     *
-     * handle is the shl_load API handle for the shared library being
-     * initialized.
-     *
-     * loading is non-zero at startup and zero at termination.
-     */
-    if (loading) {
-	/* ... do some initializations ... */
-    } else {
-	_PR_Fini();
-    }
-}
-#endif
-#elif defined(AIX)
-/* Need to use the -binitfini::_PR_Fini linker option. */
-#endif
-
-void _PR_Fini(void)
-{
-    void *thred;
-    int rv;
-
-    if (!_pr_initialized) {
-        /* Either NSPR was never successfully initialized or 
-         * PR_Cleanup has been called already. */
-        if (pt_book.keyCreated)
-        {
-            rv = pthread_key_delete(pt_book.key);
-            PR_ASSERT(0 == rv);
-            pt_book.keyCreated = PR_FALSE;
-        }
-        return;
-    }
-
-    _PT_PTHREAD_GETSPECIFIC(pt_book.key, thred);
-    if (NULL != thred)
-    {
-        /*
-         * PR_FALSE, because it is unsafe to call back to the 
-         * thread private data destructors at final cleanup.
-         */
-        _pt_thread_death_internal(thred, PR_FALSE);
-        rv = pthread_setspecific(pt_book.key, NULL);
-        PR_ASSERT(0 == rv);
-    }
-    rv = pthread_key_delete(pt_book.key);
-    PR_ASSERT(0 == rv);
-    pt_book.keyCreated = PR_FALSE;
-    /* TODO: free other resources used by NSPR */
-    /* _pr_initialized = PR_FALSE; */
-}  /* _PR_Fini */
-
-PR_IMPLEMENT(PRStatus) PR_Cleanup(void)
-{
-    PRThread *me = PR_GetCurrentThread();
-    int rv;
-    PR_LOG(_pr_thread_lm, PR_LOG_MIN, ("PR_Cleanup: shutting down NSPR"));
-    PR_ASSERT(me->state & PT_THREAD_PRIMORD);
-    if (me->state & PT_THREAD_PRIMORD)
-    {
-        PR_Lock(pt_book.ml);
-        while (pt_book.user > pt_book.this_many)
-            PR_WaitCondVar(pt_book.cv, PR_INTERVAL_NO_TIMEOUT);
-        if (me->state & PT_THREAD_SYSTEM)
-            pt_book.system -= 1;
-        else
-            pt_book.user -= 1;
-        PR_Unlock(pt_book.ml);
-
-        _PR_MD_EARLY_CLEANUP();
-
-        _PR_CleanupMW();
-        _PR_CleanupTime();
-        _PR_CleanupDtoa();
-        _PR_CleanupCallOnce();
-        _PR_ShutdownLinker();
-        _PR_LogCleanup();
-        _PR_CleanupNet();
-        /* Close all the fd's before calling _PR_CleanupIO */
-        _PR_CleanupIO();
-        _PR_CleanupCMon();
-
-        _pt_thread_death(me);
-        rv = pthread_setspecific(pt_book.key, NULL);
-        PR_ASSERT(0 == rv);
-        /*
-         * I am not sure if it's safe to delete the cv and lock here,
-         * since there may still be "system" threads around. If this
-         * call isn't immediately prior to exiting, then there's a
-         * problem.
-         */
-        if (0 == pt_book.system)
-        {
-            PR_DestroyCondVar(pt_book.cv); pt_book.cv = NULL;
-            PR_DestroyLock(pt_book.ml); pt_book.ml = NULL;
-        }
-        PR_DestroyLock(_pr_sleeplock);
-        _pr_sleeplock = NULL;
-        _PR_CleanupLayerCache();
-        _PR_CleanupEnv();
-#ifdef _PR_ZONE_ALLOCATOR
-        _PR_DestroyZones();
-#endif
-        _pr_initialized = PR_FALSE;
-        return PR_SUCCESS;
-    }
-    return PR_FAILURE;
-}  /* PR_Cleanup */
-
-PR_IMPLEMENT(void) PR_ProcessExit(PRIntn status)
-{
-    _exit(status);
-}
-
-PR_IMPLEMENT(PRUint32) PR_GetThreadID(PRThread *thred)
-{
-#if defined(_PR_DCETHREADS)
-    return (PRUint32)&thred->id;  /* this is really a sham! */
-#else
-    return (PRUint32)thred->id;  /* and I don't know what they will do with it */
-#endif
-}
-
-/*
- * $$$
- * The following two thread-to-processor affinity functions are not
- * yet implemented for pthreads.  By the way, these functions should return
- * PRStatus rather than PRInt32 to indicate the success/failure status.
- * $$$
- */
-
-PR_IMPLEMENT(PRInt32) PR_GetThreadAffinityMask(PRThread *thread, PRUint32 *mask)
-{
-    return 0;  /* not implemented */
-}
-
-PR_IMPLEMENT(PRInt32) PR_SetThreadAffinityMask(PRThread *thread, PRUint32 mask )
-{
-    return 0;  /* not implemented */
-}
-
-PR_IMPLEMENT(void)
-PR_SetThreadDumpProc(PRThread* thread, PRThreadDumpProc dump, void *arg)
-{
-    thread->dump = dump;
-    thread->dumpArg = arg;
-}
-
-/* 
- * Garbage collection support follows.
- */
-
-#if defined(_PR_DCETHREADS)
-
-/*
- * statics for Garbage Collection support.  We don't need to protect these
- * signal masks since the garbage collector itself is protected by a lock
- * and multiple threads will not be garbage collecting at the same time.
- */
-static sigset_t javagc_vtalarm_sigmask;
-static sigset_t javagc_intsoff_sigmask;
-
-#else /* defined(_PR_DCETHREADS) */
-
-/* a bogus signal mask for forcing a timed wait */
-/* Not so bogus in AIX as we really do a sigwait */
-static sigset_t sigwait_set;
-
-static struct timespec onemillisec = {0, 1000000L};
-#ifndef PT_NO_SIGTIMEDWAIT
-static struct timespec hundredmillisec = {0, 100000000L};
-#endif
-
-static void suspend_signal_handler(PRIntn sig);
-
-#ifdef PT_NO_SIGTIMEDWAIT
-static void null_signal_handler(PRIntn sig);
-#endif
-
-#endif /* defined(_PR_DCETHREADS) */
-
-/*
- * Linux pthreads use SIGUSR1 and SIGUSR2 internally, which
- * conflict with the use of these two signals in our GC support.
- * So we don't know how to support GC on Linux pthreads.
- */
-static void init_pthread_gc_support(void)
-{
-#ifndef SYMBIAN
-    PRIntn rv;
-
-#if defined(_PR_DCETHREADS)
-	rv = sigemptyset(&javagc_vtalarm_sigmask);
-    PR_ASSERT(0 == rv);
-	rv = sigaddset(&javagc_vtalarm_sigmask, SIGVTALRM);
-    PR_ASSERT(0 == rv);
-#else  /* defined(_PR_DCETHREADS) */
-	{
-	    struct sigaction sigact_usr2;
-
-	    sigact_usr2.sa_handler = suspend_signal_handler;
-	    sigact_usr2.sa_flags = SA_RESTART;
-	    sigemptyset (&sigact_usr2.sa_mask);
-
-        rv = sigaction (SIGUSR2, &sigact_usr2, NULL);
-        PR_ASSERT(0 == rv);
-
-        sigemptyset (&sigwait_set);
-#if defined(PT_NO_SIGTIMEDWAIT)
-        sigaddset (&sigwait_set, SIGUSR1);
-#else
-        sigaddset (&sigwait_set, SIGUSR2);
-#endif  /* defined(PT_NO_SIGTIMEDWAIT) */
-	}
-#if defined(PT_NO_SIGTIMEDWAIT)
-	{
-	    struct sigaction sigact_null;
-	    sigact_null.sa_handler = null_signal_handler;
-	    sigact_null.sa_flags = SA_RESTART;
-	    sigemptyset (&sigact_null.sa_mask);
-        rv = sigaction (SIGUSR1, &sigact_null, NULL);
-	    PR_ASSERT(0 ==rv); 
-    }
-#endif  /* defined(PT_NO_SIGTIMEDWAIT) */
-#endif /* defined(_PR_DCETHREADS) */
-#endif /* SYMBIAN */
-}
-
-PR_IMPLEMENT(void) PR_SetThreadGCAble(void)
-{
-    PR_Lock(pt_book.ml);
-	PR_GetCurrentThread()->state |= PT_THREAD_GCABLE;
-    PR_Unlock(pt_book.ml);
-}
-
-PR_IMPLEMENT(void) PR_ClearThreadGCAble(void)
-{
-    PR_Lock(pt_book.ml);
-	PR_GetCurrentThread()->state &= (~PT_THREAD_GCABLE);
-    PR_Unlock(pt_book.ml);
-}
-
-#if defined(DEBUG)
-static PRBool suspendAllOn = PR_FALSE;
-#endif
-
-static PRBool suspendAllSuspended = PR_FALSE;
-
-PR_IMPLEMENT(PRStatus) PR_EnumerateThreads(PREnumerator func, void *arg)
-{
-    PRIntn count = 0;
-    PRStatus rv = PR_SUCCESS;
-    PRThread* thred = pt_book.first;
-
-#if defined(DEBUG) || defined(FORCE_PR_ASSERT)
-#if !defined(_PR_DCETHREADS)
-    PRThread *me = PR_GetCurrentThread();
-#endif
-#endif
-
-    PR_LOG(_pr_gc_lm, PR_LOG_ALWAYS, ("Begin PR_EnumerateThreads\n"));
-    /*
-     * $$$
-     * Need to suspend all threads other than me before doing this.
-     * This is really a gross and disgusting thing to do. The only
-     * good thing is that since all other threads are suspended, holding
-     * the lock during a callback seems like child's play.
-     * $$$
-     */
-    PR_ASSERT(suspendAllOn);
-
-    while (thred != NULL)
-    {
-        /* Steve Morse, 4-23-97: Note that we can't walk a queue by taking
-         * qp->next after applying the function "func".  In particular, "func"
-         * might remove the thread from the queue and put it into another one in
-         * which case qp->next no longer points to the next entry in the original
-         * queue.
-         *
-         * To get around this problem, we save qp->next in qp_next before applying
-         * "func" and use that saved value as the next value after applying "func".
-         */
-        PRThread* next = thred->next;
-
-        if (_PT_IS_GCABLE_THREAD(thred))
-        {
-#if !defined(_PR_DCETHREADS)
-            PR_ASSERT((thred == me) || (thred->suspend & PT_THREAD_SUSPENDED));
-#endif
-            PR_LOG(_pr_gc_lm, PR_LOG_ALWAYS, 
-                   ("In PR_EnumerateThreads callback thread %p thid = %X\n", 
-                    thred, thred->id));
-
-            rv = func(thred, count++, arg);
-            if (rv != PR_SUCCESS)
-                return rv;
-        }
-        thred = next;
-    }
-    PR_LOG(_pr_gc_lm, PR_LOG_ALWAYS, 
-	   ("End PR_EnumerateThreads count = %d \n", count));
-    return rv;
-}  /* PR_EnumerateThreads */
-
-/*
- * PR_SuspendAll and PR_ResumeAll are called during garbage collection.  The strategy 
- * we use is to send a SIGUSR2 signal to every gc able thread that we intend to suspend.
- * The signal handler will record the stack pointer and will block until resumed by
- * the resume call.  Since the signal handler is the last routine called for the
- * suspended thread, the stack pointer will also serve as a place where all the
- * registers have been saved on the stack for the previously executing routines.
- *
- * Through global variables, we also make sure that PR_Suspend and PR_Resume does not
- * proceed until the thread is suspended or resumed.
- */
-
-#if !defined(_PR_DCETHREADS)
-
-/*
- * In the signal handler, we can not use condition variable notify or wait.
- * This does not work consistently across all pthread platforms.  We also can not 
- * use locking since that does not seem to work reliably across platforms.
- * Only thing we can do is yielding while testing for a global condition
- * to change.  This does work on pthread supported platforms.  We may have
- * to play with priortities if there are any problems detected.
- */
-
- /* 
-  * In AIX, you cannot use ANY pthread calls in the signal handler except perhaps
-  * pthread_yield. But that is horribly inefficient. Hence we use only sigwait, no
-  * sigtimedwait is available. We need to use another user signal, SIGUSR1. Actually
-  * SIGUSR1 is also used by exec in Java. So our usage here breaks the exec in Java,
-  * for AIX. You cannot use pthread_cond_wait or pthread_delay_np in the signal
-  * handler as all synchronization mechanisms just break down. 
-  */
-
-#if defined(PT_NO_SIGTIMEDWAIT)
-static void null_signal_handler(PRIntn sig)
-{
-	return;
-}
-#endif
-
-static void suspend_signal_handler(PRIntn sig)
-{
-	PRThread *me = PR_GetCurrentThread();
-
-	PR_ASSERT(me != NULL);
-	PR_ASSERT(_PT_IS_GCABLE_THREAD(me));
-	PR_ASSERT((me->suspend & PT_THREAD_SUSPENDED) == 0);
-
-	PR_LOG(_pr_gc_lm, PR_LOG_ALWAYS, 
-        ("Begin suspend_signal_handler thred %p thread id = %X\n", 
-		me, me->id));
-
-	/*
-	 * save stack pointer
-	 */
-	me->sp = &me;
-
-	/* 
-	   At this point, the thread's stack pointer has been saved,
-	   And it is going to enter a wait loop until it is resumed.
-	   So it is _really_ suspended 
-	*/
-
-	me->suspend |= PT_THREAD_SUSPENDED;
-
-	/*
-	 * now, block current thread
-	 */
-#if defined(PT_NO_SIGTIMEDWAIT)
-	pthread_cond_signal(&me->suspendResumeCV);
-	while (me->suspend & PT_THREAD_SUSPENDED)
-	{
-#if !defined(FREEBSD) && !defined(NETBSD) && !defined(OPENBSD) \
-    && !defined(BSDI) && !defined(UNIXWARE) \
-    && !defined(DARWIN) && !defined(RISCOS) \
-    && !defined(SYMBIAN) /*XXX*/
-        PRIntn rv;
-	    sigwait(&sigwait_set, &rv);
-#endif
-	}
-	me->suspend |= PT_THREAD_RESUMED;
-	pthread_cond_signal(&me->suspendResumeCV);
-#else /* defined(PT_NO_SIGTIMEDWAIT) */
-	while (me->suspend & PT_THREAD_SUSPENDED)
-	{
-		PRIntn rv = sigtimedwait(&sigwait_set, NULL, &hundredmillisec);
-    	PR_ASSERT(-1 == rv);
-	}
-	me->suspend |= PT_THREAD_RESUMED;
-#endif
-
-    /*
-     * At this point, thread has been resumed, so set a global condition.
-     * The ResumeAll needs to know that this has really been resumed. 
-     * So the signal handler sets a flag which PR_ResumeAll will reset. 
-     * The PR_ResumeAll must reset this flag ...
-     */
-
-    PR_LOG(_pr_gc_lm, PR_LOG_ALWAYS, 
-        ("End suspend_signal_handler thred = %p tid = %X\n", me, me->id));
-}  /* suspend_signal_handler */
-
-static void pt_SuspendSet(PRThread *thred)
-{
-    PRIntn rv;
-
-    PR_LOG(_pr_gc_lm, PR_LOG_ALWAYS, 
-	   ("pt_SuspendSet thred %p thread id = %X\n", thred, thred->id));
-
-
-    /*
-     * Check the thread state and signal the thread to suspend
-     */
-
-    PR_ASSERT((thred->suspend & PT_THREAD_SUSPENDED) == 0);
-
-    PR_LOG(_pr_gc_lm, PR_LOG_ALWAYS, 
-	   ("doing pthread_kill in pt_SuspendSet thred %p tid = %X\n",
-	   thred, thred->id));
-#if defined(SYMBIAN)
-    /* All signal group functions are not implemented in Symbian OS */
-    rv = 0;
-#else
-    rv = pthread_kill (thred->id, SIGUSR2);
-#endif
-    PR_ASSERT(0 == rv);
-}
-
-static void pt_SuspendTest(PRThread *thred)
-{
-    PR_LOG(_pr_gc_lm, PR_LOG_ALWAYS, 
-	   ("Begin pt_SuspendTest thred %p thread id = %X\n", thred, thred->id));
-
-
-    /*
-     * Wait for the thread to be really suspended. This happens when the
-     * suspend signal handler stores the stack pointer and sets the state
-     * to suspended. 
-     */
-
-#if defined(PT_NO_SIGTIMEDWAIT)
-    pthread_mutex_lock(&thred->suspendResumeMutex);
-    while ((thred->suspend & PT_THREAD_SUSPENDED) == 0)
-    {
-	    pthread_cond_timedwait(
-	        &thred->suspendResumeCV, &thred->suspendResumeMutex, &onemillisec);
-	}
-	pthread_mutex_unlock(&thred->suspendResumeMutex);
-#else
-    while ((thred->suspend & PT_THREAD_SUSPENDED) == 0)
-    {
-		PRIntn rv = sigtimedwait(&sigwait_set, NULL, &onemillisec);
-    	PR_ASSERT(-1 == rv);
-	}
-#endif
-
-    PR_LOG(_pr_gc_lm, PR_LOG_ALWAYS,
-        ("End pt_SuspendTest thred %p tid %X\n", thred, thred->id));
-}  /* pt_SuspendTest */
-
-static void pt_ResumeSet(PRThread *thred)
-{
-    PR_LOG(_pr_gc_lm, PR_LOG_ALWAYS, 
-	   ("pt_ResumeSet thred %p thread id = %X\n", thred, thred->id));
-
-    /*
-     * Clear the global state and set the thread state so that it will
-     * continue past yield loop in the suspend signal handler
-     */
-
-    PR_ASSERT(thred->suspend & PT_THREAD_SUSPENDED);
-
-
-    thred->suspend &= ~PT_THREAD_SUSPENDED;
-
-#if defined(PT_NO_SIGTIMEDWAIT)
-#if defined(SYMBIAN) 
-	/* All signal group functions are not implemented in Symbian OS */
-#else
-	pthread_kill(thred->id, SIGUSR1);
-#endif
-#endif
-
-}  /* pt_ResumeSet */
-
-static void pt_ResumeTest(PRThread *thred)
-{
-    PR_LOG(_pr_gc_lm, PR_LOG_ALWAYS, 
-	   ("Begin pt_ResumeTest thred %p thread id = %X\n", thred, thred->id));
-
-    /*
-     * Wait for the threads resume state to change
-     * to indicate it is really resumed 
-     */
-#if defined(PT_NO_SIGTIMEDWAIT)
-    pthread_mutex_lock(&thred->suspendResumeMutex);
-    while ((thred->suspend & PT_THREAD_RESUMED) == 0)
-    {
-	    pthread_cond_timedwait(
-	        &thred->suspendResumeCV, &thred->suspendResumeMutex, &onemillisec);
-    }
-    pthread_mutex_unlock(&thred->suspendResumeMutex);
-#else
-    while ((thred->suspend & PT_THREAD_RESUMED) == 0) {
-		PRIntn rv = sigtimedwait(&sigwait_set, NULL, &onemillisec);
-    	PR_ASSERT(-1 == rv);
-	}
-#endif
-
-    thred->suspend &= ~PT_THREAD_RESUMED;
-
-    PR_LOG(_pr_gc_lm, PR_LOG_ALWAYS, (
-        "End pt_ResumeTest thred %p tid %X\n", thred, thred->id));
-}  /* pt_ResumeTest */
-
-static pthread_once_t pt_gc_support_control = PTHREAD_ONCE_INIT;
-
-PR_IMPLEMENT(void) PR_SuspendAll(void)
-{
-#ifdef DEBUG
-    PRIntervalTime stime, etime;
-#endif
-    PRThread* thred = pt_book.first;
-    PRThread *me = PR_GetCurrentThread();
-    int rv;
-
-    rv = pthread_once(&pt_gc_support_control, init_pthread_gc_support);
-    PR_ASSERT(0 == rv);
-    PR_LOG(_pr_gc_lm, PR_LOG_ALWAYS, ("Begin PR_SuspendAll\n"));
-    /*
-     * Stop all threads which are marked GC able.
-     */
-    PR_Lock(pt_book.ml);
-#ifdef DEBUG
-    suspendAllOn = PR_TRUE;
-    stime = PR_IntervalNow();
-#endif
-    while (thred != NULL)
-    {
-	    if ((thred != me) && _PT_IS_GCABLE_THREAD(thred))
-    		pt_SuspendSet(thred);
-        thred = thred->next;
-    }
-
-    /* Wait till they are really suspended */
-    thred = pt_book.first;
-    while (thred != NULL)
-    {
-	    if ((thred != me) && _PT_IS_GCABLE_THREAD(thred))
-            pt_SuspendTest(thred);
-        thred = thred->next;
-    }
-
-    suspendAllSuspended = PR_TRUE;
-
-#ifdef DEBUG
-    etime = PR_IntervalNow();
-    PR_LOG(_pr_gc_lm, PR_LOG_ALWAYS,\
-        ("End PR_SuspendAll (time %dms)\n",
-        PR_IntervalToMilliseconds(etime - stime)));
-#endif
-}  /* PR_SuspendAll */
-
-PR_IMPLEMENT(void) PR_ResumeAll(void)
-{
-#ifdef DEBUG
-    PRIntervalTime stime, etime;
-#endif
-    PRThread* thred = pt_book.first;
-    PRThread *me = PR_GetCurrentThread();
-    PR_LOG(_pr_gc_lm, PR_LOG_ALWAYS, ("Begin PR_ResumeAll\n"));
-    /*
-     * Resume all previously suspended GC able threads.
-     */
-    suspendAllSuspended = PR_FALSE;
-#ifdef DEBUG
-    stime = PR_IntervalNow();
-#endif
-
-    while (thred != NULL)
-    {
-	    if ((thred != me) && _PT_IS_GCABLE_THREAD(thred))
-    	    pt_ResumeSet(thred);
-        thred = thred->next;
-    }
-
-    thred = pt_book.first;
-    while (thred != NULL)
-    {
-	    if ((thred != me) && _PT_IS_GCABLE_THREAD(thred))
-    	    pt_ResumeTest(thred);
-        thred = thred->next;
-    }
-
-    PR_Unlock(pt_book.ml);
-#ifdef DEBUG
-    suspendAllOn = PR_FALSE;
-    etime = PR_IntervalNow();
-    PR_LOG(_pr_gc_lm, PR_LOG_ALWAYS,
-        ("End PR_ResumeAll (time %dms)\n",
-        PR_IntervalToMilliseconds(etime - stime)));
-#endif
-}  /* PR_ResumeAll */
-
-/* Return the stack pointer for the given thread- used by the GC */
-PR_IMPLEMENT(void *)PR_GetSP(PRThread *thred)
-{
-    PR_LOG(_pr_gc_lm, PR_LOG_ALWAYS, 
-	    ("in PR_GetSP thred %p thid = %X, sp = %p\n", 
-	    thred, thred->id, thred->sp));
-    return thred->sp;
-}  /* PR_GetSP */
-
-#else /* !defined(_PR_DCETHREADS) */
-
-static pthread_once_t pt_gc_support_control = pthread_once_init;
-
-/*
- * For DCE threads, there is no pthread_kill or a way of suspending or resuming a
- * particular thread.  We will just disable the preemption (virtual timer alarm) and
- * let the executing thread finish the garbage collection.  This stops all other threads
- * (GC able or not) and is very inefficient but there is no other choice.
- */
-PR_IMPLEMENT(void) PR_SuspendAll()
-{
-    PRIntn rv;
-
-    rv = pthread_once(&pt_gc_support_control, init_pthread_gc_support);
-    PR_ASSERT(0 == rv);  /* returns -1 on failure */
-#ifdef DEBUG
-    suspendAllOn = PR_TRUE;
-#endif
-    PR_LOG(_pr_gc_lm, PR_LOG_ALWAYS, ("Begin PR_SuspendAll\n"));
-    /* 
-     * turn off preemption - i.e add virtual alarm signal to the set of 
-     * blocking signals 
-     */
-    rv = sigprocmask(
-        SIG_BLOCK, &javagc_vtalarm_sigmask, &javagc_intsoff_sigmask);
-    PR_ASSERT(0 == rv);
-    suspendAllSuspended = PR_TRUE;
-    PR_LOG(_pr_gc_lm, PR_LOG_ALWAYS, ("End PR_SuspendAll\n"));
-}  /* PR_SuspendAll */
-
-PR_IMPLEMENT(void) PR_ResumeAll()
-{
-    PRIntn rv;
-    
-    suspendAllSuspended = PR_FALSE;
-    PR_LOG(_pr_gc_lm, PR_LOG_ALWAYS, ("Begin PR_ResumeAll\n"));
-    /* turn on preemption - i.e re-enable virtual alarm signal */
-
-    rv = sigprocmask(SIG_SETMASK, &javagc_intsoff_sigmask, (sigset_t *)NULL);
-    PR_ASSERT(0 == rv);
-#ifdef DEBUG
-    suspendAllOn = PR_FALSE;
-#endif
-
-    PR_LOG(_pr_gc_lm, PR_LOG_ALWAYS, ("End PR_ResumeAll\n"));
-}  /* PR_ResumeAll */
-
-/* Return the stack pointer for the given thread- used by the GC */
-PR_IMPLEMENT(void*)PR_GetSP(PRThread *thred)
-{
-	pthread_t tid = thred->id;
-	char *thread_tcb, *top_sp;
-
-	/*
-	 * For HPUX DCE threads, pthread_t is a struct with the
-	 * following three fields (see pthread.h, dce/cma.h):
-	 *     cma_t_address       field1;
-	 *     short int           field2;
-	 *     short int           field3;
-	 * where cma_t_address is typedef'd to be either void*
-	 * or char*.
-	 */
-	PR_LOG(_pr_gc_lm, PR_LOG_ALWAYS, ("Begin PR_GetSP\n"));
-	thread_tcb = (char*)tid.field1;
-	top_sp = *(char**)(thread_tcb + 128);
-	PR_LOG(_pr_gc_lm, PR_LOG_ALWAYS, ("End PR_GetSP %p \n", top_sp));
-	return top_sp;
-}  /* PR_GetSP */
-
-#endif /* !defined(_PR_DCETHREADS) */
-
-PR_IMPLEMENT(PRStatus) PR_SetCurrentThreadName(const char *name)
-{
-    PRThread *thread;
-    size_t nameLen;
-    int result = 0;
-
-    if (!name) {
-        PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0);
-        return PR_FAILURE;
-    }
-
-    thread = PR_GetCurrentThread();
-    if (!thread)
-        return PR_FAILURE;
-
-    PR_Free(thread->name);
-    nameLen = strlen(name);
-    thread->name = (char *)PR_Malloc(nameLen + 1);
-    if (!thread->name)
-        return PR_FAILURE;
-    memcpy(thread->name, name, nameLen + 1);
-
-#if defined(OPENBSD) || defined(FREEBSD) || defined(DRAGONFLY)
-    pthread_set_name_np(thread->id, name);
-#elif defined(NETBSD)
-    result = pthread_setname_np(thread->id, "%s", (void *)name);
-#else /* not BSD */
-    /*
-     * On OSX, pthread_setname_np is only available in 10.6 or later, so test
-     * for it at runtime.  It also may not be available on all linux distros.
-     */
-#if defined(DARWIN)
-    int (*dynamic_pthread_setname_np)(const char*);
-#else
-    int (*dynamic_pthread_setname_np)(pthread_t, const char*);
-#endif
-
-    *(void**)(&dynamic_pthread_setname_np) =
-        dlsym(RTLD_DEFAULT, "pthread_setname_np");
-    if (!dynamic_pthread_setname_np)
-        return PR_SUCCESS;
-
-    /*
-     * The 15-character name length limit is an experimentally determined
-     * length of a null-terminated string that most linux distros and OS X
-     * accept as an argument to pthread_setname_np.  Otherwise the E2BIG
-     * error is returned by the function.
-     */
-#define SETNAME_LENGTH_CONSTRAINT 15
-#define SETNAME_FRAGMENT1_LENGTH (SETNAME_LENGTH_CONSTRAINT >> 1)
-#define SETNAME_FRAGMENT2_LENGTH \
-    (SETNAME_LENGTH_CONSTRAINT - SETNAME_FRAGMENT1_LENGTH - 1)
-    char name_dup[SETNAME_LENGTH_CONSTRAINT + 1];
-    if (nameLen > SETNAME_LENGTH_CONSTRAINT) {
-        memcpy(name_dup, name, SETNAME_FRAGMENT1_LENGTH);
-        name_dup[SETNAME_FRAGMENT1_LENGTH] = '~';
-        /* Note that this also copies the null terminator. */
-        memcpy(name_dup + SETNAME_FRAGMENT1_LENGTH + 1,
-               name + nameLen - SETNAME_FRAGMENT2_LENGTH,
-               SETNAME_FRAGMENT2_LENGTH + 1);
-        name = name_dup;
-    }
-
-#if defined(DARWIN)
-    result = dynamic_pthread_setname_np(name);
-#else
-    result = dynamic_pthread_setname_np(thread->id, name);
-#endif
-#endif /* not BSD */
-
-    if (result) {
-        PR_SetError(PR_UNKNOWN_ERROR, result);
-        return PR_FAILURE;
-    }
-    return PR_SUCCESS;
-}
-
-PR_IMPLEMENT(const char *) PR_GetThreadName(const PRThread *thread)
-{
-    if (!thread)
-        return NULL;
-    return thread->name;
-}
-
-#endif  /* defined(_PR_PTHREADS) || defined(_PR_DCETHREADS) */
-
-/* ptthread.c */