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/**
* Copyright (C) 2013 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.
*/
#pragma once
#include "mongo/bson/bson_field.h"
#include "mongo/db/jsobj.h"
#include "mongo/platform/cstdint.h"
#include "mongo/util/concurrency/mutex.h"
namespace mongo {
/**
* Simple class for storing statistics for the RangeDeleter.
*/
class RangeDeleterStats {
public:
//
// BSON representation top level fields.
//
// Total number of deletes, including deletes that are pending and in progress.
static const BSONField<int> TotalDeletesField;
// Total number of deletes that are yet to be worked on.
static const BSONField<int> PendingDeletesField;
// Total number of deletes that are currently in progress.
static const BSONField<int> InProgressDeletesField;
/**
* Creates a stat object given the mutex from the RangeDeleter object
* that this instance is keeping track of.
*/
RangeDeleterStats(mutex* lockPtr):
_lockPtr(lockPtr),
_totalDeletes(0),
_pendingDeletes(0),
_inProgressDeletes(0) {
}
/**
* Returns the BSON representation of this stat object.
*/
BSONObj toBSON() const;
// Returns the current number of active and pending deletes.
int getCurrentDeletes() const;
//
// Setters - Should be holding mutex passed to
// the constructor when calling these methods.
//
void incTotalDeletes_inlock() {
_totalDeletes++;
}
void decTotalDeletes_inlock() {
_totalDeletes--;
}
void incPendingDeletes_inlock() {
_pendingDeletes++;
}
void decPendingDeletes_inlock() {
_pendingDeletes--;
}
void incInProgressDeletes_inlock() {
_inProgressDeletes++;
}
void decInProgressDeletes_inlock() {
_inProgressDeletes--;
}
bool hasInProgress_inlock() {
return _inProgressDeletes > 0;
}
private:
// Protects all data structures below this. Not owned here.
mutable mutex* _lockPtr;
int _totalDeletes;
int _pendingDeletes;
int _inProgressDeletes;
};
}
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