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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 "utils/conditional_variable.h"
#include <errno.h>
#include <time.h>
#include "utils/lock.h"
#include "utils/logger.h"
namespace {
const long kNanosecondsPerSecond = 1000000000;
const long kMillisecondsPerSecond = 1000;
const long kNanosecondsPerMillisecond = 1000000;
} // namespace
namespace sync_primitives {
CREATE_LOGGERPTR_GLOBAL(logger_, "Utils")
ConditionalVariable::ConditionalVariable() {}
ConditionalVariable::~ConditionalVariable() {}
void ConditionalVariable::NotifyOne() {
cond_var_.notify_one();
}
void ConditionalVariable::Broadcast() {
cond_var_.notify_all();
}
bool ConditionalVariable::Wait(BaseLock& lock) {
// NOTE this grossness is due to boost mutex and recursive mutex not sharing a
// superclass
lock.AssertTakenAndMarkFree();
// What kind of lock are we ?
if (Lock* test_lock = dynamic_cast<Lock*>(&lock)) {
// Regular lock
cond_var_.wait<boost::mutex>(test_lock->mutex_);
} else if (RecursiveLock* test_rec_lock =
dynamic_cast<RecursiveLock*>(&lock)) {
// Recursive lock
cond_var_.wait<boost::recursive_mutex>(test_rec_lock->mutex_);
} else {
// unknown, give up the lock
LOG4CXX_ERROR(logger_, "Unknown lock type!");
NOTREACHED();
}
lock.AssertFreeAndMarkTaken();
return true;
}
bool ConditionalVariable::Wait(AutoLock& auto_lock) {
BaseLock& lock = auto_lock.GetLock();
return Wait(lock);
}
ConditionalVariable::WaitStatus ConditionalVariable::WaitFor(
AutoLock& auto_lock, uint32_t milliseconds) {
BaseLock& lock = auto_lock.GetLock();
WaitStatus wait_status = kNoTimeout;
lock.AssertTakenAndMarkFree();
bool timeout = true;
// What kind of lock are we ?
if (Lock* test_lock = dynamic_cast<Lock*>(&lock)) {
// Regular lock
// cond_var_.wait<boost::mutex>(test_lock->mutex_);
timeout = cond_var_.timed_wait<boost::mutex>(
test_lock->mutex_, boost::posix_time::milliseconds(milliseconds));
} else if (RecursiveLock* test_rec_lock =
dynamic_cast<RecursiveLock*>(&lock)) {
// Recursive lock
// cond_var_.wait<boost::recursive_mutex>(test_rec_lock->mutex_);
timeout = cond_var_.timed_wait<boost::recursive_mutex>(
test_rec_lock->mutex_, boost::posix_time::milliseconds(milliseconds));
} else {
// this is an unknown lock, we have an issue
LOG4CXX_ERROR(logger_, "Unknown lock type!");
NOTREACHED();
}
if (!timeout) {
wait_status = kTimeout;
}
lock.AssertFreeAndMarkTaken();
return wait_status;
}
} // namespace sync_primitives
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