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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.
*/
#include "mongo/bson/bsonobj.h"
#include "mongo/db/operation_context.h"
#include "mongo/util/fail_point_service.h"
namespace mongo {
class CurOpFailpointHelpers {
public:
/**
* Helper function which sets the 'msg' field of the opCtx's CurOp to the specified string, and
* returns the original value of the field.
*/
static std::string updateCurOpMsg(OperationContext* opCtx, const std::string& newMsg);
/**
* This helper function works much like MONGO_FAIL_POINT_PAUSE_WHILE_SET, but additionally
* calls whileWaiting() at regular intervals. Finally, it also sets the 'msg' field of the
* opCtx's CurOp to the given string while the failpoint is active.
*
* whileWaiting() may be used to do anything the caller needs done while hanging in the
* failpoint. For example, the caller may use whileWaiting() to release and reacquire locks in
* order to avoid deadlocks.
*/
static void waitWhileFailPointEnabled(FailPoint* failPoint,
OperationContext* opCtx,
const std::string& curOpMsg,
const std::function<void(void)>& whileWaiting = nullptr);
};
}
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