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//background.cpp
/* Copyright 2009 10gen Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "stdafx.h"
#include "goodies.h"
#include "background.h"
namespace mongo {
BackgroundJob *BackgroundJob::grab = 0;
mongo::mutex BackgroundJob::mutex;
/* static */
void BackgroundJob::thr() {
assert( grab );
BackgroundJob *us = grab;
assert( us->state == NotStarted );
us->state = Running;
grab = 0;
us->run();
us->state = Done;
if ( us->deleteSelf )
delete us;
}
BackgroundJob& BackgroundJob::go() {
scoped_lock bl(mutex);
assert( grab == 0 );
grab = this;
boost::thread t(thr);
while ( grab )
sleepmillis(2);
return *this;
}
bool BackgroundJob::wait(int msMax) {
assert( state != NotStarted );
int ms = 1;
Date_t start = jsTime();
while ( state != Done ) {
sleepmillis(ms);
if ( ms < 1000 )
ms = ms * 2;
if ( msMax && ( int( jsTime() - start ) > msMax) )
return false;
}
return true;
}
} // namespace mongo
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