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/*
* 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 "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
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