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