| /* |
| * Copyright (C) 2007, 2009 Apple Inc. All rights reserved. |
| * Copyright (C) 2007 Justin Haygood (jhaygood@reaktix.com) |
| * Copyright (C) 2011 Research In Motion Limited. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of |
| * its contributors may be used to endorse or promote products derived |
| * from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY |
| * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
| * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY |
| * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
| * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include "third_party/blink/renderer/platform/wtf/threading.h" |
| |
| #include "build/build_config.h" |
| |
| #if defined(OS_POSIX) || defined(OS_FUCHSIA) |
| |
| #include <errno.h> |
| #include <limits.h> |
| #include <sched.h> |
| #include <sys/time.h> |
| #include "base/threading/scoped_blocking_call.h" |
| #include "third_party/blink/renderer/platform/wtf/date_math.h" |
| #include "third_party/blink/renderer/platform/wtf/hash_map.h" |
| #include "third_party/blink/renderer/platform/wtf/std_lib_extras.h" |
| #include "third_party/blink/renderer/platform/wtf/thread_specific.h" |
| #include "third_party/blink/renderer/platform/wtf/threading.h" |
| #include "third_party/blink/renderer/platform/wtf/threading_primitives.h" |
| |
| #if defined(OS_MAC) |
| #include <objc/objc-auto.h> |
| #endif |
| |
| #if defined(OS_LINUX) || defined(OS_CHROMEOS) |
| #include <sys/syscall.h> |
| #endif |
| |
| #if defined(OS_LINUX) || defined(OS_CHROMEOS) || defined(OS_ANDROID) |
| #include <unistd.h> |
| #endif |
| |
| namespace WTF { |
| |
| MutexBase::MutexBase(bool recursive) { |
| pthread_mutexattr_t attr; |
| pthread_mutexattr_init(&attr); |
| pthread_mutexattr_settype( |
| &attr, recursive ? PTHREAD_MUTEX_RECURSIVE : PTHREAD_MUTEX_NORMAL); |
| |
| int result = pthread_mutex_init(&mutex_.internal_mutex_, &attr); |
| DCHECK_EQ(result, 0); |
| #if DCHECK_IS_ON() |
| mutex_.recursion_count_ = 0; |
| #endif |
| |
| pthread_mutexattr_destroy(&attr); |
| } |
| |
| MutexBase::~MutexBase() { |
| int result = pthread_mutex_destroy(&mutex_.internal_mutex_); |
| DCHECK_EQ(result, 0); |
| } |
| |
| void MutexBase::lock() { |
| int result = pthread_mutex_lock(&mutex_.internal_mutex_); |
| DCHECK_EQ(result, 0); |
| #if DCHECK_IS_ON() |
| DCHECK(!mutex_.recursion_count_) |
| << "WTF does not support recursive mutex acquisition!"; |
| ++mutex_.recursion_count_; |
| #endif |
| } |
| |
| void MutexBase::unlock() { |
| #if DCHECK_IS_ON() |
| DCHECK(mutex_.recursion_count_); |
| --mutex_.recursion_count_; |
| #endif |
| int result = pthread_mutex_unlock(&mutex_.internal_mutex_); |
| DCHECK_EQ(result, 0); |
| } |
| |
| // There is a separate tryLock implementation for the Mutex and the |
| // RecursiveMutex since on Windows we need to manually check if tryLock should |
| // succeed or not for the non-recursive mutex. On Linux the two implementations |
| // are equal except we can assert the recursion count is always zero for the |
| // non-recursive mutex. |
| bool Mutex::TryLock() { |
| int result = pthread_mutex_trylock(&mutex_.internal_mutex_); |
| if (result == 0) { |
| #if DCHECK_IS_ON() |
| // The Mutex class is not recursive, so the recursionCount should be |
| // zero after getting the lock. |
| DCHECK(!mutex_.recursion_count_) |
| << "WTF does not support recursive mutex acquisition!"; |
| ++mutex_.recursion_count_; |
| #endif |
| return true; |
| } |
| if (result == EBUSY) |
| return false; |
| |
| NOTREACHED(); |
| return false; |
| } |
| |
| bool RecursiveMutex::TryLock() { |
| int result = pthread_mutex_trylock(&mutex_.internal_mutex_); |
| if (result == 0) { |
| #if DCHECK_IS_ON() |
| DCHECK(!mutex_.recursion_count_) |
| << "WTF does not support recursive mutex acquisition!"; |
| ++mutex_.recursion_count_; |
| #endif |
| return true; |
| } |
| if (result == EBUSY) |
| return false; |
| |
| NOTREACHED(); |
| return false; |
| } |
| |
| ThreadCondition::ThreadCondition(Mutex& mutex) : mutex_(mutex.Impl()) { |
| pthread_cond_init(&condition_, nullptr); |
| } |
| |
| ThreadCondition::~ThreadCondition() { |
| pthread_cond_destroy(&condition_); |
| } |
| |
| void ThreadCondition::Wait() { |
| base::ScopedBlockingCall scoped_blocking_call(FROM_HERE, |
| base::BlockingType::MAY_BLOCK); |
| #if DCHECK_IS_ON() |
| --mutex_.recursion_count_; |
| #endif |
| int result = pthread_cond_wait(&condition_, &mutex_.internal_mutex_); |
| DCHECK_EQ(result, 0); |
| #if DCHECK_IS_ON() |
| ++mutex_.recursion_count_; |
| #endif |
| } |
| |
| void ThreadCondition::Signal() { |
| int result = pthread_cond_signal(&condition_); |
| DCHECK_EQ(result, 0); |
| } |
| |
| void ThreadCondition::Broadcast() { |
| int result = pthread_cond_broadcast(&condition_); |
| DCHECK_EQ(result, 0); |
| } |
| |
| } // namespace WTF |
| |
| #endif // defined(OS_POSIX) || defined(OS_FUCHSIA) |