diff -r 000000000000 -r 6474c204b198 js/src/vm/PosixNSPR.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/vm/PosixNSPR.cpp	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,360 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
+ * vim: set ts=8 sts=4 et sw=4 tw=99:
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "vm/PosixNSPR.h"
+
+#include "js/Utility.h"
+
+#ifdef JS_POSIX_NSPR
+
+#include <errno.h>
+#include <sys/time.h>
+#include <time.h>
+
+#if defined(__DragonFly__) || defined(__FreeBSD__) || defined(__OpenBSD__)
+#include <pthread_np.h>
+#endif
+
+class nspr::Thread
+{
+    pthread_t pthread_;
+    void (*start)(void *arg);
+    void *arg;
+    bool joinable;
+
+  public:
+    Thread(void (*start)(void *arg), void *arg, bool joinable)
+      : start(start), arg(arg), joinable(joinable) {}
+
+    static void *ThreadRoutine(void *arg);
+
+    pthread_t &pthread() { return pthread_; }
+};
+
+static pthread_key_t gSelfThreadIndex;
+static nspr::Thread gMainThread(nullptr, nullptr, false);
+
+void *
+nspr::Thread::ThreadRoutine(void *arg)
+{
+    Thread *self = static_cast<Thread *>(arg);
+    pthread_setspecific(gSelfThreadIndex, self);
+    self->start(self->arg);
+    if (!self->joinable)
+        js_delete(self);
+    return nullptr;
+}
+
+static bool gInitialized;
+
+void
+DummyDestructor(void *)
+{
+}
+
+/* Should be called from the main thread. */
+static void
+Initialize()
+{
+    gInitialized = true;
+
+    if (pthread_key_create(&gSelfThreadIndex, DummyDestructor)) {
+        MOZ_CRASH();
+        return;
+    }
+
+    pthread_setspecific(gSelfThreadIndex, &gMainThread);
+}
+
+PRThread *
+PR_CreateThread(PRThreadType type,
+		void (*start)(void *arg),
+		void *arg,
+		PRThreadPriority priority,
+		PRThreadScope scope,
+		PRThreadState state,
+		uint32_t stackSize)
+{
+    JS_ASSERT(type == PR_USER_THREAD);
+    JS_ASSERT(priority == PR_PRIORITY_NORMAL);
+
+    if (!gInitialized) {
+        /*
+         * We assume that the first call to PR_CreateThread happens on the main
+         * thread.
+         */
+        Initialize();
+    }
+
+    pthread_attr_t attr;
+    if (pthread_attr_init(&attr))
+        return nullptr;
+
+    if (stackSize && pthread_attr_setstacksize(&attr, stackSize)) {
+        pthread_attr_destroy(&attr);
+        return nullptr;
+    }
+
+    nspr::Thread *t = js_new<nspr::Thread>(start, arg,
+                                           state != PR_UNJOINABLE_THREAD);
+    if (!t) {
+        pthread_attr_destroy(&attr);
+        return nullptr;
+    }
+
+    if (pthread_create(&t->pthread(), &attr, &nspr::Thread::ThreadRoutine, t)) {
+        pthread_attr_destroy(&attr);
+        js_delete(t);
+        return nullptr;
+    }
+
+    if (state == PR_UNJOINABLE_THREAD) {
+        if (pthread_detach(t->pthread())) {
+            pthread_attr_destroy(&attr);
+            js_delete(t);
+            return nullptr;
+        }
+    }
+
+    pthread_attr_destroy(&attr);
+
+    return t;
+}
+
+PRStatus
+PR_JoinThread(PRThread *thread)
+{
+    if (pthread_join(thread->pthread(), nullptr))
+        return PR_FAILURE;
+
+    js_delete(thread);
+
+    return PR_SUCCESS;
+}
+
+PRThread *
+PR_GetCurrentThread()
+{
+    if (!gInitialized)
+        Initialize();
+
+    return (PRThread *)pthread_getspecific(gSelfThreadIndex);
+}
+
+PRStatus
+PR_SetCurrentThreadName(const char *name)
+{
+    int result;
+#ifdef XP_MACOSX
+    result = pthread_setname_np(name);
+#elif defined(__DragonFly__) || defined(__FreeBSD__) || defined(__OpenBSD__)
+    pthread_set_name_np(pthread_self(), name);
+    result = 0;
+#elif defined(__NetBSD__)
+    result = pthread_setname_np(pthread_self(), "%s", (void *)name);
+#else
+    result = pthread_setname_np(pthread_self(), name);
+#endif
+    if (result)
+        return PR_FAILURE;
+    return PR_SUCCESS;
+}
+
+static const size_t MaxTLSKeyCount = 32;
+static size_t gTLSKeyCount;
+static pthread_key_t gTLSKeys[MaxTLSKeyCount];
+
+PRStatus
+PR_NewThreadPrivateIndex(unsigned *newIndex, PRThreadPrivateDTOR destructor)
+{
+    /*
+     * We only call PR_NewThreadPrivateIndex from the main thread, so there's no
+     * need to lock the table of TLS keys.
+     */
+    JS_ASSERT(PR_GetCurrentThread() == &gMainThread);
+
+    pthread_key_t key;
+    if (pthread_key_create(&key, destructor))
+        return PR_FAILURE;
+
+    JS_ASSERT(gTLSKeyCount + 1 < MaxTLSKeyCount);
+
+    gTLSKeys[gTLSKeyCount] = key;
+    *newIndex = gTLSKeyCount;
+    gTLSKeyCount++;
+
+    return PR_SUCCESS;
+}
+
+PRStatus
+PR_SetThreadPrivate(unsigned index, void *priv)
+{
+    if (index >= gTLSKeyCount)
+        return PR_FAILURE;
+    if (pthread_setspecific(gTLSKeys[index], priv))
+        return PR_FAILURE;
+    return PR_SUCCESS;
+}
+
+void *
+PR_GetThreadPrivate(unsigned index)
+{
+    if (index >= gTLSKeyCount)
+        return nullptr;
+    return pthread_getspecific(gTLSKeys[index]);
+}
+
+PRStatus
+PR_CallOnce(PRCallOnceType *once, PRCallOnceFN func)
+{
+    MOZ_ASSUME_UNREACHABLE("PR_CallOnce unimplemented");
+}
+
+PRStatus
+PR_CallOnceWithArg(PRCallOnceType *once, PRCallOnceWithArgFN func, void *arg)
+{
+    MOZ_ASSUME_UNREACHABLE("PR_CallOnceWithArg unimplemented");
+}
+
+class nspr::Lock
+{
+    pthread_mutex_t mutex_;
+
+  public:
+    Lock() {}
+    pthread_mutex_t &mutex() { return mutex_; }
+};
+
+PRLock *
+PR_NewLock()
+{
+    nspr::Lock *lock = js_new<nspr::Lock>();
+    if (!lock)
+        return nullptr;
+
+    if (pthread_mutex_init(&lock->mutex(), nullptr)) {
+        js_delete(lock);
+        return nullptr;
+    }
+
+    return lock;
+}
+
+void
+PR_DestroyLock(PRLock *lock)
+{
+    pthread_mutex_destroy(&lock->mutex());
+    js_delete(lock);
+}
+
+void
+PR_Lock(PRLock *lock)
+{
+    pthread_mutex_lock(&lock->mutex());
+}
+
+PRStatus
+PR_Unlock(PRLock *lock)
+{
+    if (pthread_mutex_unlock(&lock->mutex()))
+        return PR_FAILURE;
+    return PR_SUCCESS;
+}
+
+class nspr::CondVar
+{
+    pthread_cond_t cond_;
+    nspr::Lock *lock_;
+
+  public:
+    CondVar(nspr::Lock *lock) : lock_(lock) {}
+    pthread_cond_t &cond() { return cond_; }
+    nspr::Lock *lock() { return lock_; }
+};
+
+PRCondVar *
+PR_NewCondVar(PRLock *lock)
+{
+    nspr::CondVar *cvar = js_new<nspr::CondVar>(lock);
+    if (!cvar)
+        return nullptr;
+
+    if (pthread_cond_init(&cvar->cond(), nullptr)) {
+        js_delete(cvar);
+        return nullptr;
+    }
+
+    return cvar;
+}
+
+void
+PR_DestroyCondVar(PRCondVar *cvar)
+{
+    pthread_cond_destroy(&cvar->cond());
+    js_delete(cvar);
+}
+
+PRStatus
+PR_NotifyCondVar(PRCondVar *cvar)
+{
+    if (pthread_cond_signal(&cvar->cond()))
+        return PR_FAILURE;
+    return PR_SUCCESS;
+}
+
+PRStatus
+PR_NotifyAllCondVar(PRCondVar *cvar)
+{
+    if (pthread_cond_broadcast(&cvar->cond()))
+        return PR_FAILURE;
+    return PR_SUCCESS;
+}
+
+uint32_t
+PR_MillisecondsToInterval(uint32_t milli)
+{
+    return milli;
+}
+
+static const uint64_t TicksPerSecond = 1000;
+static const uint64_t NanoSecondsInSeconds = 1000000000;
+static const uint64_t MicroSecondsInSeconds = 1000000;
+
+uint32_t
+PR_TicksPerSecond()
+{
+    return TicksPerSecond;
+}
+
+PRStatus
+PR_WaitCondVar(PRCondVar *cvar, uint32_t timeout)
+{
+    if (timeout == PR_INTERVAL_NO_TIMEOUT) {
+        if (pthread_cond_wait(&cvar->cond(), &cvar->lock()->mutex()))
+            return PR_FAILURE;
+        return PR_SUCCESS;
+    } else {
+        struct timespec ts;
+        struct timeval tv;
+
+        gettimeofday(&tv, nullptr);
+        ts.tv_sec = tv.tv_sec;
+        ts.tv_nsec = tv.tv_usec * (NanoSecondsInSeconds / MicroSecondsInSeconds);
+
+        ts.tv_nsec += timeout * (NanoSecondsInSeconds / TicksPerSecond);
+        while (uint64_t(ts.tv_nsec) >= NanoSecondsInSeconds) {
+            ts.tv_nsec -= NanoSecondsInSeconds;
+            ts.tv_sec++;
+        }
+
+        int result = pthread_cond_timedwait(&cvar->cond(), &cvar->lock()->mutex(), &ts);
+        if (result == 0 || result == ETIMEDOUT)
+            return PR_SUCCESS;
+        return PR_FAILURE;
+    }
+}
+
+#endif /* JS_POSIX_NSPR */