The Tor Browser: comparison js/src/vm/PosixNSPR.cpp

--1:000000000000
+:6c79b37ddaf6
+/* -*- 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 */

The Tor Browser / file comparison

comparison: js/src/vm/PosixNSPR.cpp

js/src/vm/PosixNSPR.cpp