mirror of
https://github.com/classilla/tenfourfox.git
synced 2024-09-26 23:54:56 +00:00
374 lines
7.9 KiB
C++
374 lines
7.9 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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* vim: set ts=8 sts=4 et sw=4 tw=99:
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "vm/PosixNSPR.h"
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#include "js/Utility.h"
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#ifdef JS_POSIX_NSPR
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#include <errno.h>
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#include <sys/time.h>
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#include <time.h>
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#if defined(__DragonFly__) || defined(__FreeBSD__) || defined(__OpenBSD__)
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#include <pthread_np.h>
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#endif
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class nspr::Thread
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{
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pthread_t pthread_;
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void (*start)(void* arg);
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void* arg;
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bool joinable;
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public:
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Thread(void (*start)(void* arg), void* arg, bool joinable)
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: start(start), arg(arg), joinable(joinable) {}
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static void* ThreadRoutine(void* arg);
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pthread_t& pthread() { return pthread_; }
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};
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static pthread_key_t gSelfThreadIndex;
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static nspr::Thread gMainThread(nullptr, nullptr, false);
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void*
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nspr::Thread::ThreadRoutine(void* arg)
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{
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Thread* self = static_cast<Thread*>(arg);
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pthread_setspecific(gSelfThreadIndex, self);
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self->start(self->arg);
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if (!self->joinable)
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js_delete(self);
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return nullptr;
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}
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static bool gInitialized;
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void
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DummyDestructor(void*)
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{
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}
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/* Should be called from the main thread. */
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static void
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Initialize()
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{
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gInitialized = true;
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if (pthread_key_create(&gSelfThreadIndex, DummyDestructor)) {
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MOZ_CRASH();
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return;
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}
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pthread_setspecific(gSelfThreadIndex, &gMainThread);
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}
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PRThread*
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PR_CreateThread(PRThreadType type,
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void (*start)(void* arg),
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void* arg,
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PRThreadPriority priority,
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PRThreadScope scope,
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PRThreadState state,
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uint32_t stackSize)
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{
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MOZ_ASSERT(type == PR_USER_THREAD);
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MOZ_ASSERT(priority == PR_PRIORITY_NORMAL);
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if (!gInitialized) {
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/*
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* We assume that the first call to PR_CreateThread happens on the main
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* thread.
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*/
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Initialize();
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}
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pthread_attr_t attr;
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if (pthread_attr_init(&attr))
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return nullptr;
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if (stackSize && pthread_attr_setstacksize(&attr, stackSize)) {
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pthread_attr_destroy(&attr);
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return nullptr;
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}
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nspr::Thread* t = js_new<nspr::Thread>(start, arg,
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state != PR_UNJOINABLE_THREAD);
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if (!t) {
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pthread_attr_destroy(&attr);
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return nullptr;
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}
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if (pthread_create(&t->pthread(), &attr, &nspr::Thread::ThreadRoutine, t)) {
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pthread_attr_destroy(&attr);
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js_delete(t);
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return nullptr;
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}
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if (state == PR_UNJOINABLE_THREAD) {
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if (pthread_detach(t->pthread())) {
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pthread_attr_destroy(&attr);
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js_delete(t);
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return nullptr;
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}
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}
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pthread_attr_destroy(&attr);
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return t;
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}
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PRStatus
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PR_JoinThread(PRThread* thread)
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{
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if (pthread_join(thread->pthread(), nullptr))
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return PR_FAILURE;
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js_delete(thread);
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return PR_SUCCESS;
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}
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PRThread*
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PR_GetCurrentThread()
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{
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if (!gInitialized)
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Initialize();
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PRThread* thread = reinterpret_cast<PRThread*>(pthread_getspecific(gSelfThreadIndex));
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if (!thread) {
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thread = js_new<PRThread>(nullptr, nullptr, false);
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if (!thread)
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MOZ_CRASH();
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pthread_setspecific(gSelfThreadIndex, thread);
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}
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return thread;
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}
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PRStatus
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PR_SetCurrentThreadName(const char* name)
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{
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int result;
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#ifdef XP_DARWIN
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result = pthread_setname_np(name);
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#elif defined(__DragonFly__) || defined(__FreeBSD__) || defined(__OpenBSD__)
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pthread_set_name_np(pthread_self(), name);
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result = 0;
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#elif defined(__NetBSD__)
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result = pthread_setname_np(pthread_self(), "%s", (void*)name);
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#else
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result = pthread_setname_np(pthread_self(), name);
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#endif
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if (result)
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return PR_FAILURE;
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return PR_SUCCESS;
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}
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static const size_t MaxTLSKeyCount = 32;
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static size_t gTLSKeyCount;
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static pthread_key_t gTLSKeys[MaxTLSKeyCount];
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PRStatus
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PR_NewThreadPrivateIndex(unsigned* newIndex, PRThreadPrivateDTOR destructor)
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{
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/*
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* We only call PR_NewThreadPrivateIndex from the main thread, so there's no
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* need to lock the table of TLS keys.
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*/
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MOZ_ASSERT(PR_GetCurrentThread() == &gMainThread);
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pthread_key_t key;
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if (pthread_key_create(&key, destructor))
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return PR_FAILURE;
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MOZ_ASSERT(gTLSKeyCount + 1 < MaxTLSKeyCount);
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gTLSKeys[gTLSKeyCount] = key;
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*newIndex = gTLSKeyCount;
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gTLSKeyCount++;
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return PR_SUCCESS;
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}
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PRStatus
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PR_SetThreadPrivate(unsigned index, void* priv)
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{
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if (index >= gTLSKeyCount)
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return PR_FAILURE;
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if (pthread_setspecific(gTLSKeys[index], priv))
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return PR_FAILURE;
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return PR_SUCCESS;
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}
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void*
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PR_GetThreadPrivate(unsigned index)
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{
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if (index >= gTLSKeyCount)
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return nullptr;
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return pthread_getspecific(gTLSKeys[index]);
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}
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PRStatus
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PR_CallOnce(PRCallOnceType* once, PRCallOnceFN func)
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{
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MOZ_CRASH("PR_CallOnce unimplemented");
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}
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PRStatus
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PR_CallOnceWithArg(PRCallOnceType* once, PRCallOnceWithArgFN func, void* arg)
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{
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MOZ_CRASH("PR_CallOnceWithArg unimplemented");
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}
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class nspr::Lock
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{
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pthread_mutex_t mutex_;
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public:
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Lock() {}
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pthread_mutex_t& mutex() { return mutex_; }
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};
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PRLock*
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PR_NewLock()
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{
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nspr::Lock* lock = js_new<nspr::Lock>();
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if (!lock)
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return nullptr;
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if (pthread_mutex_init(&lock->mutex(), nullptr)) {
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js_delete(lock);
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return nullptr;
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}
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return lock;
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}
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void
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PR_DestroyLock(PRLock* lock)
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{
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pthread_mutex_destroy(&lock->mutex());
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js_delete(lock);
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}
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void
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PR_Lock(PRLock* lock)
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{
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pthread_mutex_lock(&lock->mutex());
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}
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PRStatus
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PR_Unlock(PRLock* lock)
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{
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if (pthread_mutex_unlock(&lock->mutex()))
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return PR_FAILURE;
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return PR_SUCCESS;
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}
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class nspr::CondVar
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{
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pthread_cond_t cond_;
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nspr::Lock* lock_;
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public:
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explicit CondVar(nspr::Lock* lock) : lock_(lock) {}
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pthread_cond_t& cond() { return cond_; }
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nspr::Lock* lock() { return lock_; }
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};
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PRCondVar*
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PR_NewCondVar(PRLock* lock)
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{
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nspr::CondVar* cvar = js_new<nspr::CondVar>(lock);
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if (!cvar)
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return nullptr;
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if (pthread_cond_init(&cvar->cond(), nullptr)) {
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js_delete(cvar);
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return nullptr;
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}
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return cvar;
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}
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void
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PR_DestroyCondVar(PRCondVar* cvar)
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{
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pthread_cond_destroy(&cvar->cond());
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js_delete(cvar);
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}
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PRStatus
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PR_NotifyCondVar(PRCondVar* cvar)
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{
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if (pthread_cond_signal(&cvar->cond()))
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return PR_FAILURE;
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return PR_SUCCESS;
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}
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PRStatus
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PR_NotifyAllCondVar(PRCondVar* cvar)
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{
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if (pthread_cond_broadcast(&cvar->cond()))
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return PR_FAILURE;
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return PR_SUCCESS;
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}
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uint32_t
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PR_MillisecondsToInterval(uint32_t milli)
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{
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return milli;
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}
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uint32_t
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PR_MicrosecondsToInterval(uint32_t micro)
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{
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return (micro + 999) / 1000;
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}
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static const uint64_t TicksPerSecond = 1000;
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static const uint64_t NanoSecondsInSeconds = 1000000000;
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static const uint64_t MicroSecondsInSeconds = 1000000;
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uint32_t
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PR_TicksPerSecond()
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{
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return TicksPerSecond;
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}
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PRStatus
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PR_WaitCondVar(PRCondVar* cvar, uint32_t timeout)
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{
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if (timeout == PR_INTERVAL_NO_TIMEOUT) {
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if (pthread_cond_wait(&cvar->cond(), &cvar->lock()->mutex()))
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return PR_FAILURE;
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return PR_SUCCESS;
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} else {
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struct timespec ts;
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struct timeval tv;
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gettimeofday(&tv, nullptr);
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ts.tv_sec = tv.tv_sec;
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ts.tv_nsec = tv.tv_usec * (NanoSecondsInSeconds / MicroSecondsInSeconds);
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ts.tv_nsec += timeout * (NanoSecondsInSeconds / TicksPerSecond);
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while (uint64_t(ts.tv_nsec) >= NanoSecondsInSeconds) {
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ts.tv_nsec -= NanoSecondsInSeconds;
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ts.tv_sec++;
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}
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int result = pthread_cond_timedwait(&cvar->cond(), &cvar->lock()->mutex(), &ts);
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if (result == 0 || result == ETIMEDOUT)
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return PR_SUCCESS;
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return PR_FAILURE;
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}
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}
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#endif /* JS_POSIX_NSPR */
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