| /* |
| * Copyright (C) 2011 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #include "mutex.h" |
| |
| #include <errno.h> |
| |
| #include "heap.h" // for VERIFY_OBJECT_ENABLED |
| #include "logging.h" |
| #include "utils.h" |
| |
| namespace art { |
| |
| Mutex::Mutex(const char* name) : name_(name) { |
| #ifndef NDEBUG |
| pthread_mutexattr_t debug_attributes; |
| errno = pthread_mutexattr_init(&debug_attributes); |
| if (errno != 0) { |
| PLOG(FATAL) << "pthread_mutexattr_init failed"; |
| } |
| #if VERIFY_OBJECT_ENABLED |
| errno = pthread_mutexattr_settype(&debug_attributes, PTHREAD_MUTEX_RECURSIVE); |
| #else |
| errno = pthread_mutexattr_settype(&debug_attributes, PTHREAD_MUTEX_ERRORCHECK); |
| #endif |
| if (errno != 0) { |
| PLOG(FATAL) << "pthread_mutexattr_settype failed"; |
| } |
| errno = pthread_mutex_init(&mutex_, &debug_attributes); |
| if (errno != 0) { |
| PLOG(FATAL) << "pthread_mutex_init failed"; |
| } |
| errno = pthread_mutexattr_destroy(&debug_attributes); |
| if (errno != 0) { |
| PLOG(FATAL) << "pthread_mutexattr_destroy failed"; |
| } |
| #else |
| errno = pthread_mutex_init(&mutex_, NULL); |
| if (errno != 0) { |
| PLOG(FATAL) << "pthread_mutex_init failed"; |
| } |
| #endif |
| } |
| |
| Mutex::~Mutex() { |
| errno = pthread_mutex_destroy(&mutex_); |
| if (errno != 0) { |
| PLOG(FATAL) << "pthread_mutex_destroy failed"; |
| } |
| } |
| |
| void Mutex::Lock() { |
| int result = pthread_mutex_lock(&mutex_); |
| if (result != 0) { |
| errno = result; |
| PLOG(FATAL) << "pthread_mutex_lock failed"; |
| } |
| } |
| |
| bool Mutex::TryLock() { |
| int result = pthread_mutex_trylock(&mutex_); |
| if (result == EBUSY) { |
| return false; |
| } |
| if (result != 0) { |
| errno = result; |
| PLOG(FATAL) << "pthread_mutex_trylock failed"; |
| } |
| return true; |
| } |
| |
| void Mutex::Unlock() { |
| int result = pthread_mutex_unlock(&mutex_); |
| if (result != 0) { |
| errno = result; |
| PLOG(FATAL) << "pthread_mutex_unlock failed"; |
| } |
| } |
| |
| pid_t Mutex::GetOwner() { |
| #ifdef __BIONIC__ |
| return static_cast<pid_t>((mutex_.value >> 16) & 0xffff); |
| #else |
| UNIMPLEMENTED(FATAL); |
| return 0; |
| #endif |
| } |
| |
| pid_t Mutex::GetTid() { |
| return art::GetTid(); |
| } |
| |
| } // namespace |