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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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 "mozilla/Assertions.h"
#include <chrono>
#include <thread>
#include "js/Utility.h"
#include "threading/posix/ThreadPlatformData.h"
#include "threading/Thread.h"
namespace js {
inline ThreadId::PlatformData* ThreadId::platformData() {
static_assert(sizeof platformData_ >= sizeof(PlatformData),
"platformData_ is too small");
return reinterpret_cast<PlatformData*>(platformData_);
}
inline const ThreadId::PlatformData* ThreadId::platformData() const {
static_assert(sizeof platformData_ >= sizeof(PlatformData),
"platformData_ is too small");
return reinterpret_cast<const PlatformData*>(platformData_);
}
ThreadId::ThreadId() { platformData()->hasThread = false; }
ThreadId::operator bool() const { return platformData()->hasThread; }
bool ThreadId::operator==(const ThreadId& aOther) const {
const PlatformData& self = *platformData();
const PlatformData& other = *aOther.platformData();
return (!self.hasThread && !other.hasThread) ||
(self.hasThread == other.hasThread &&
pthread_equal(self.ptThread, other.ptThread));
}
bool Thread::create(void* (*aMain)(void*), void* aArg) {
MOZ_RELEASE_ASSERT(!joinable());
if (oom::ShouldFailWithOOM()) {
return false;
}
pthread_attr_t attrs;
int r = pthread_attr_init(&attrs);
MOZ_RELEASE_ASSERT(!r);
if (options_.stackSize()) {
r = pthread_attr_setstacksize(&attrs, options_.stackSize());
MOZ_RELEASE_ASSERT(!r);
}
r = pthread_create(&id_.platformData()->ptThread, &attrs, aMain, aArg);
if (r) {
// On either Windows or POSIX we can't be sure if id_ was initialised. So
// reset it manually.
id_ = ThreadId();
return false;
}
id_.platformData()->hasThread = true;
return true;
}
void Thread::join() {
MOZ_RELEASE_ASSERT(joinable());
int r = pthread_join(id_.platformData()->ptThread, nullptr);
MOZ_RELEASE_ASSERT(!r);
id_ = ThreadId();
}
void Thread::detach() {
MOZ_RELEASE_ASSERT(joinable());
int r = pthread_detach(id_.platformData()->ptThread);
MOZ_RELEASE_ASSERT(!r);
id_ = ThreadId();
}
ThreadId ThreadId::ThisThreadId() {
ThreadId id;
id.platformData()->ptThread = pthread_self();
id.platformData()->hasThread = true;
MOZ_RELEASE_ASSERT(id != ThreadId());
return id;
}
void ThisThread::SetName(const char* name) {
MOZ_RELEASE_ASSERT(name);
#if (defined(__APPLE__) && defined(__MACH__)) || defined(__linux__)
# if defined(XP_DARWIN)
// Mac OS X has a length limit of 63 characters, but there is no API
// exposing it.
# define SETNAME_LENGTH_CONSTRAINT 63
# else
// On linux the name may not be longer than 16 bytes, including
// the null terminator. Truncate the name to 15 characters.
# define SETNAME_LENGTH_CONSTRAINT 15
# endif
char nameBuf[SETNAME_LENGTH_CONSTRAINT + 1];
strncpy(nameBuf, name, sizeof nameBuf - 1);
nameBuf[sizeof nameBuf - 1] = '\0';
name = nameBuf;
#endif
int rv;
#ifdef XP_DARWIN
rv = pthread_setname_np(name);
#elif defined(__DragonFly__) || defined(__FreeBSD__) || defined(__OpenBSD__)
pthread_set_name_np(pthread_self(), name);
rv = 0;
#elif defined(__NetBSD__)
rv = pthread_setname_np(pthread_self(), "%s", (void*)name);
#else
rv = pthread_setname_np(pthread_self(), name);
#endif
MOZ_RELEASE_ASSERT(!rv);
}
void ThisThread::GetName(char* nameBuffer, size_t len) {
MOZ_RELEASE_ASSERT(len >= 16);
int rv = -1;
#ifdef HAVE_PTHREAD_GETNAME_NP
rv = pthread_getname_np(pthread_self(), nameBuffer, len);
#elif defined(HAVE_PTHREAD_GET_NAME_NP)
pthread_get_name_np(pthread_self(), nameBuffer, len);
rv = 0;
#elif defined(__linux__)
rv = prctl(PR_GET_NAME, reinterpret_cast<unsigned long>(nameBuffer));
#endif
if (rv) {
nameBuffer[0] = '\0';
}
}
void ThisThread::SleepMilliseconds(size_t ms) {
std::this_thread::sleep_for(std::chrono::milliseconds(ms));
}
} // namespace js
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