| // Copyright 2013 the V8 project authors. All rights reserved. |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions are |
| // met: |
| // |
| // * Redistributions of source code must retain the above copyright |
| // notice, this list of conditions and the following disclaimer. |
| // * 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. |
| // * Neither the name of Google Inc. 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 THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT |
| // OWNER OR 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 "platform/mutex.h" |
| |
| #include <cerrno> |
| |
| namespace v8 { |
| namespace internal { |
| |
| #if V8_OS_POSIX |
| |
| static V8_INLINE void InitializeNativeHandle(pthread_mutex_t* mutex) { |
| int result; |
| #if defined(DEBUG) |
| // Use an error checking mutex in debug mode. |
| pthread_mutexattr_t attr; |
| result = pthread_mutexattr_init(&attr); |
| ASSERT_EQ(0, result); |
| result = pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_ERRORCHECK); |
| ASSERT_EQ(0, result); |
| result = pthread_mutex_init(mutex, &attr); |
| ASSERT_EQ(0, result); |
| result = pthread_mutexattr_destroy(&attr); |
| #else |
| // Use a fast mutex (default attributes). |
| result = pthread_mutex_init(mutex, NULL); |
| #endif // defined(DEBUG) |
| ASSERT_EQ(0, result); |
| USE(result); |
| } |
| |
| |
| static V8_INLINE void InitializeRecursiveNativeHandle(pthread_mutex_t* mutex) { |
| pthread_mutexattr_t attr; |
| int result = pthread_mutexattr_init(&attr); |
| ASSERT_EQ(0, result); |
| result = pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE); |
| ASSERT_EQ(0, result); |
| result = pthread_mutex_init(mutex, &attr); |
| ASSERT_EQ(0, result); |
| result = pthread_mutexattr_destroy(&attr); |
| ASSERT_EQ(0, result); |
| USE(result); |
| } |
| |
| |
| static V8_INLINE void DestroyNativeHandle(pthread_mutex_t* mutex) { |
| int result = pthread_mutex_destroy(mutex); |
| ASSERT_EQ(0, result); |
| USE(result); |
| } |
| |
| |
| static V8_INLINE void LockNativeHandle(pthread_mutex_t* mutex) { |
| int result = pthread_mutex_lock(mutex); |
| ASSERT_EQ(0, result); |
| USE(result); |
| } |
| |
| |
| static V8_INLINE void UnlockNativeHandle(pthread_mutex_t* mutex) { |
| int result = pthread_mutex_unlock(mutex); |
| ASSERT_EQ(0, result); |
| USE(result); |
| } |
| |
| |
| static V8_INLINE bool TryLockNativeHandle(pthread_mutex_t* mutex) { |
| int result = pthread_mutex_trylock(mutex); |
| if (result == EBUSY) { |
| return false; |
| } |
| ASSERT_EQ(0, result); |
| return true; |
| } |
| |
| #elif V8_OS_WIN |
| |
| static V8_INLINE void InitializeNativeHandle(PCRITICAL_SECTION cs) { |
| InitializeCriticalSection(cs); |
| } |
| |
| |
| static V8_INLINE void InitializeRecursiveNativeHandle(PCRITICAL_SECTION cs) { |
| InitializeCriticalSection(cs); |
| } |
| |
| |
| static V8_INLINE void DestroyNativeHandle(PCRITICAL_SECTION cs) { |
| DeleteCriticalSection(cs); |
| } |
| |
| |
| static V8_INLINE void LockNativeHandle(PCRITICAL_SECTION cs) { |
| EnterCriticalSection(cs); |
| } |
| |
| |
| static V8_INLINE void UnlockNativeHandle(PCRITICAL_SECTION cs) { |
| LeaveCriticalSection(cs); |
| } |
| |
| |
| static V8_INLINE bool TryLockNativeHandle(PCRITICAL_SECTION cs) { |
| return TryEnterCriticalSection(cs); |
| } |
| |
| #endif // V8_OS_POSIX |
| |
| |
| Mutex::Mutex() { |
| InitializeNativeHandle(&native_handle_); |
| #ifdef DEBUG |
| level_ = 0; |
| #endif |
| } |
| |
| |
| Mutex::~Mutex() { |
| DestroyNativeHandle(&native_handle_); |
| ASSERT_EQ(0, level_); |
| } |
| |
| |
| void Mutex::Lock() { |
| LockNativeHandle(&native_handle_); |
| AssertUnheldAndMark(); |
| } |
| |
| |
| void Mutex::Unlock() { |
| AssertHeldAndUnmark(); |
| UnlockNativeHandle(&native_handle_); |
| } |
| |
| |
| bool Mutex::TryLock() { |
| if (!TryLockNativeHandle(&native_handle_)) { |
| return false; |
| } |
| AssertUnheldAndMark(); |
| return true; |
| } |
| |
| |
| RecursiveMutex::RecursiveMutex() { |
| InitializeRecursiveNativeHandle(&native_handle_); |
| #ifdef DEBUG |
| level_ = 0; |
| #endif |
| } |
| |
| |
| RecursiveMutex::~RecursiveMutex() { |
| DestroyNativeHandle(&native_handle_); |
| ASSERT_EQ(0, level_); |
| } |
| |
| |
| void RecursiveMutex::Lock() { |
| LockNativeHandle(&native_handle_); |
| #ifdef DEBUG |
| ASSERT_LE(0, level_); |
| level_++; |
| #endif |
| } |
| |
| |
| void RecursiveMutex::Unlock() { |
| #ifdef DEBUG |
| ASSERT_LT(0, level_); |
| level_--; |
| #endif |
| UnlockNativeHandle(&native_handle_); |
| } |
| |
| |
| bool RecursiveMutex::TryLock() { |
| if (!TryLockNativeHandle(&native_handle_)) { |
| return false; |
| } |
| #ifdef DEBUG |
| ASSERT_LE(0, level_); |
| level_++; |
| #endif |
| return true; |
| } |
| |
| } } // namespace v8::internal |