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/*
* Copyright (c) 2013, Ford Motor Company
* 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 the Ford Motor Company 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 HOLDER 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 <errno.h>
#include <stdint.h>
#include <string.h>
#include <cstring>
#include "utils/lock.h"
#include "utils/logger.h"
namespace sync_primitives {
CREATE_LOGGERPTR_GLOBAL(logger_, "Utils")
Lock::Lock() : lock_taken_(0) {}
Lock::~Lock() {
if (lock_taken_ > 0) {
LOG4CXX_FATAL(logger_, "Destroying non-released regular mutex " << &mutex_);
}
}
void Lock::Acquire() {
mutex_.lock();
AssertFreeAndMarkTaken();
}
void Lock::Release() {
AssertTakenAndMarkFree();
mutex_.unlock();
}
bool Lock::Try() {
bool status = mutex_.try_lock();
if (status) {
AssertFreeAndMarkTaken();
}
return status;
}
void Lock::AssertFreeAndMarkTaken() {
if (lock_taken_ != 0) {
LOG4CXX_FATAL(logger_, "Locking already taken not recursive mutex");
NOTREACHED();
}
lock_taken_++;
}
void Lock::AssertTakenAndMarkFree() {
if (lock_taken_ == 0) {
LOG4CXX_FATAL(logger_, "Unlocking a mutex that is not taken");
NOTREACHED();
}
lock_taken_--;
}
// Recursive lock looks the same on the surface, some code duplication is
// necessary since they don't have a shared parent superclass
RecursiveLock::RecursiveLock() : lock_taken_(0) {}
RecursiveLock::~RecursiveLock() {
if (lock_taken_ > 0) {
LOG4CXX_FATAL(logger_,
"Destroying non-released recursive mutex " << &mutex_);
}
}
void RecursiveLock::Acquire() {
mutex_.lock();
AssertFreeAndMarkTaken();
}
void RecursiveLock::Release() {
AssertTakenAndMarkFree();
mutex_.unlock();
}
bool RecursiveLock::Try() {
bool status = mutex_.try_lock();
if (status) {
AssertFreeAndMarkTaken();
}
return status;
}
void RecursiveLock::AssertFreeAndMarkTaken() {
lock_taken_++;
}
void RecursiveLock::AssertTakenAndMarkFree() {
if (lock_taken_ == 0) {
LOG4CXX_FATAL(logger_, "Unlocking a recursive mutex that is not taken");
NOTREACHED();
}
lock_taken_--;
}
} // namespace sync_primitives
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