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/* Copyright 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.
*/
#include "mongo/platform/basic.h"
#include "mongo/db/server_options.h"
#include "mongo/stdx/mutex.h"
#include "mongo/stdx/thread.h"
#include "mongo/unittest/unittest.h"
#include "mongo/util/background.h"
#include "mongo/util/concurrency/synchronization.h"
#include "mongo/util/time_support.h"
namespace {
using mongo::BackgroundJob;
using mongo::MsgAssertionException;
using mongo::stdx::mutex;
using mongo::Notification;
namespace stdx = mongo::stdx;
// a global variable that can be accessed independent of the IncTester object below
// IncTester keeps it up-to-date
int GLOBAL_val;
class IncTester : public mongo::BackgroundJob {
public:
explicit IncTester(long long millis, bool selfDelete = false)
: mongo::BackgroundJob(selfDelete), _val(0), _millis(millis) {
GLOBAL_val = 0;
}
void waitAndInc(long long millis) {
if (millis)
mongo::sleepmillis(millis);
++_val;
++GLOBAL_val;
}
int getVal() {
return _val;
}
/* --- BackgroundJob virtuals --- */
std::string name() const {
return "IncTester";
}
void run() {
waitAndInc(_millis);
}
private:
int _val;
long long _millis;
};
TEST(BackgroundJobBasic, NormalCase) {
IncTester tester(0 /* inc without wait */);
tester.go();
ASSERT(tester.wait());
ASSERT_EQUALS(tester.getVal(), 1);
}
TEST(BackgroundJobBasic, TimeOutCase) {
IncTester tester(2000 /* wait 2 sec before inc-ing */);
tester.go();
ASSERT(!tester.wait(100 /* ms */)); // should time out
ASSERT_EQUALS(tester.getVal(), 0);
// if we wait longer than the IncTester, we should see the increment
ASSERT(tester.wait(4000 /* ms */)); // should not time out
ASSERT_EQUALS(tester.getVal(), 1);
}
TEST(BackgroundJobBasic, SelfDeletingCase) {
mongo::BackgroundJob* j = new IncTester(0 /* inc without wait */, true /* self delete */);
j->go();
// the background thread should have continued running and this test should pass the
// heap-checker as well
mongo::sleepmillis(1000);
ASSERT_EQUALS(GLOBAL_val, 1);
}
TEST(BackgroundJobLifeCycle, Go) {
class Job : public BackgroundJob {
public:
Job() : _hasRun(false) {}
virtual std::string name() const {
return "BackgroundLifeCycle::CannotCallGoAgain";
}
virtual void run() {
{
stdx::lock_guard<stdx::mutex> lock(_mutex);
ASSERT_FALSE(_hasRun);
_hasRun = true;
}
_n.waitToBeNotified();
}
void notify() {
_n.notifyOne();
}
private:
mutex _mutex;
bool _hasRun;
Notification _n;
};
Job j;
// This call starts Job running.
j.go();
// Calling 'go' again while it is running is an error.
ASSERT_THROWS(j.go(), MsgAssertionException);
// Stop the Job
j.notify();
j.wait();
// Calling 'go' on a done task is a no-op. If it were not,
// we would fail the assert in Job::run above.
j.go();
}
} // namespace
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