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/**
* Copyright (C) 2015 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.
*/
#include "mongo/platform/basic.h"
#include "mongo/db/concurrency/d_concurrency.h"
#include "mongo/db/concurrency/write_conflict_exception.h"
#include "mongo/db/curop.h"
#include "mongo/db/operation_context.h"
#include "mongo/db/repl/database_task.h"
#include "mongo/util/assert_util.h"
namespace mongo {
namespace repl {
// static
DatabaseTask::Task DatabaseTask::makeGlobalExclusiveLockTask(const Task& task) {
invariant(task);
DatabaseTask::Task newTask = [task](OperationContext* opCtx, const Status& status) {
if (!status.isOK()) {
return task(opCtx, status);
}
MONGO_WRITE_CONFLICT_RETRY_LOOP_BEGIN {
ScopedTransaction transaction(opCtx, MODE_X);
Lock::GlobalWrite lock(opCtx->lockState());
return task(opCtx, status);
}
MONGO_WRITE_CONFLICT_RETRY_LOOP_END(opCtx, "globalExclusiveLockTask", "global");
MONGO_UNREACHABLE;
};
return newTask;
}
// static
DatabaseTask::Task DatabaseTask::makeDatabaseLockTask(const Task& task,
const std::string& databaseName,
LockMode mode) {
invariant(task);
DatabaseTask::Task newTask = [=](OperationContext* opCtx, const Status& status) {
if (!status.isOK()) {
return task(opCtx, status);
}
MONGO_WRITE_CONFLICT_RETRY_LOOP_BEGIN {
LockMode permissiveLockMode = isSharedLockMode(mode) ? MODE_IS : MODE_IX;
ScopedTransaction transaction(opCtx, permissiveLockMode);
Lock::DBLock lock(opCtx->lockState(), databaseName, mode);
return task(opCtx, status);
}
MONGO_WRITE_CONFLICT_RETRY_LOOP_END(opCtx, "databaseLockTask", databaseName);
MONGO_UNREACHABLE;
};
return newTask;
}
// static
DatabaseTask::Task DatabaseTask::makeCollectionLockTask(const Task& task,
const NamespaceString& nss,
LockMode mode) {
invariant(task);
DatabaseTask::Task newTask = [=](OperationContext* opCtx, const Status& status) {
if (!status.isOK()) {
return task(opCtx, status);
}
MONGO_WRITE_CONFLICT_RETRY_LOOP_BEGIN {
LockMode permissiveLockMode = isSharedLockMode(mode) ? MODE_IS : MODE_IX;
ScopedTransaction transaction(opCtx, permissiveLockMode);
Lock::DBLock lock(opCtx->lockState(), nss.db(), permissiveLockMode);
Lock::CollectionLock collectionLock(opCtx->lockState(), nss.toString(), mode);
return task(opCtx, status);
}
MONGO_WRITE_CONFLICT_RETRY_LOOP_END(opCtx, "collectionLockTask", nss.toString());
MONGO_UNREACHABLE;
};
return newTask;
}
} // namespace repl
} // namespace mongo
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