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// synchronization.cpp
/* Copyright 2010 10gen Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the GNU Affero General Public License in all respects
* for all of the code used other than as permitted herein. If you modify
* file(s) with this exception, you may extend this exception to your
* version of the file(s), but you are not obligated to do so. If you do not
* wish to do so, delete this exception statement from your version. If you
* delete this exception statement from all source files in the program,
* then also delete it in the license file.
*/
#define MONGO_LOG_DEFAULT_COMPONENT ::mongo::logger::LogComponent::kDefault
#include "synchronization.h"
#include <boost/date_time/posix_time/posix_time.hpp>
#include "mongo/util/log.h"
namespace mongo {
namespace {
ThreadIdleCallback threadIdleCallback;
} // namespace
void registerThreadIdleCallback(ThreadIdleCallback callback) {
invariant(!threadIdleCallback);
threadIdleCallback = callback;
}
void markThreadIdle() {
if (!threadIdleCallback) {
return;
}
try {
threadIdleCallback();
}
catch (...) {
severe() << "Exception escaped from threadIdleCallback";
fassertFailedNoTrace(28603);
}
}
Notification::Notification() {
lookFor = 1;
cur = 0;
}
void Notification::waitToBeNotified() {
stdx::unique_lock<stdx::mutex> lock( _mutex );
while ( lookFor != cur )
_condition.wait(lock);
lookFor++;
}
void Notification::notifyOne() {
stdx::lock_guard<stdx::mutex> lock( _mutex );
verify( cur != lookFor );
cur++;
_condition.notify_one();
}
/* --- NotifyAll --- */
NotifyAll::NotifyAll() {
_lastDone = 0;
_lastReturned = 0;
_nWaiting = 0;
}
NotifyAll::When NotifyAll::now() {
stdx::lock_guard<stdx::mutex> lock( _mutex );
return ++_lastReturned;
}
void NotifyAll::waitFor(When e) {
stdx::unique_lock<stdx::mutex> lock( _mutex );
++_nWaiting;
while( _lastDone < e ) {
_condition.wait(lock);
}
}
void NotifyAll::awaitBeyondNow() {
stdx::unique_lock<stdx::mutex> lock( _mutex );
++_nWaiting;
When e = ++_lastReturned;
while( _lastDone <= e ) {
_condition.wait(lock);
}
}
void NotifyAll::notifyAll(When e) {
stdx::unique_lock<stdx::mutex> lock( _mutex );
_lastDone = e;
_nWaiting = 0;
_condition.notify_all();
}
} // namespace mongo
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