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/**
* Copyright (C) 2018 MongoDB 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::kSharding
#include "mongo/platform/basic.h"
#include <cstdint>
#include "mongo/s/chunk_writes_tracker.h"
#include "mongo/util/assert_util.h"
namespace mongo {
uint64_t ChunkWritesTracker::clearBytesWritten() {
return _bytesWritten.swap(0);
}
bool ChunkWritesTracker::shouldSplit(uint64_t maxChunkSize) {
if (_isLockedForSplitting) {
return false;
}
// Check if there are enough estimated bytes written to warrant a split
return getBytesWritten() > maxChunkSize / ChunkWritesTracker::kSplitTestFactor;
}
bool ChunkWritesTracker::acquireSplitLock() {
stdx::lock_guard<stdx::mutex> lk(_mtx);
if (!_isLockedForSplitting) {
_isLockedForSplitting = true;
return true;
}
return false;
}
void ChunkWritesTracker::releaseSplitLock() {
invariant(_isLockedForSplitting);
_isLockedForSplitting = false;
}
} // namespace mongo
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