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/**
* Copyright (C) 2009 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/>.
*/
#include "mongo/db/kill_current_op.h"
#include <set>
#include "mongo/bson/util/atomic_int.h"
#include "mongo/db/client.h"
#include "mongo/db/curop.h"
#include "mongo/scripting/engine.h"
namespace mongo {
void KillCurrentOp::interruptJs( AtomicUInt *op ) {
if ( !globalScriptEngine )
return;
if ( !op ) {
globalScriptEngine->interruptAll();
}
else {
globalScriptEngine->interrupt( *op );
}
}
void KillCurrentOp::killAll() {
_globalKill = true;
interruptJs( 0 );
}
bool KillCurrentOp::kill(AtomicUInt i) {
scoped_lock l( Client::clientsMutex );
return _killImpl_inclientlock(i);
}
void KillCurrentOp::blockingKill(AtomicUInt opId) {
bool killed = false;
LOG(1) << "KillCurrentOp: starting blockingkill" << endl;
boost::scoped_ptr<scoped_lock> clientLock( new scoped_lock( Client::clientsMutex ) );
boost::unique_lock<boost::mutex> lck(_mtx);
bool foundId = _killImpl_inclientlock(opId, &killed);
if (!foundId) {
// don't wait if not found
return;
}
clientLock.reset( NULL ); // unlock client since we don't need it anymore
// block until the killed operation stops
LOG(1) << "KillCurrentOp: waiting for confirmation of kill" << endl;
while (killed == false) {
_condvar.wait(lck);
}
LOG(1) << "KillCurrentOp: kill syncing complete" << endl;
}
bool KillCurrentOp::_killImpl_inclientlock(AtomicUInt i, bool* pNotifyFlag /* = NULL */) {
bool found = false;
{
for( set< Client* >::const_iterator j = Client::clients.begin();
!found && j != Client::clients.end();
++j ) {
for( CurOp *k = ( *j )->curop(); !found && k; k = k->parent() ) {
if ( k->opNum() != i )
continue;
k->kill(pNotifyFlag);
for( CurOp *l = ( *j )->curop(); l; l = l->parent() ) {
l->kill();
}
found = true;
}
}
}
if ( found ) {
interruptJs( &i );
}
return found;
}
void KillCurrentOp::notifyAllWaiters() {
boost::unique_lock<boost::mutex> lck(_mtx);
if (!haveClient())
return;
cc().curop()->setKillWaiterFlags();
_condvar.notify_all();
}
void KillCurrentOp::checkForInterrupt(bool heedMutex) {
Client& c = cc();
if (heedMutex && Lock::somethingWriteLocked() && c.hasWrittenThisPass()) {
return;
}
if (_globalKill) {
uasserted(11600, "interrupted at shutdown");
}
if (c.curop()->maxTimeHasExpired()) {
c.curop()->kill();
notifyAllWaiters();
uasserted(16986, "operation exceeded time limit");
}
if (c.curop()->killPending()) {
notifyAllWaiters();
uasserted(11601, "operation was interrupted");
}
}
const char * KillCurrentOp::checkForInterruptNoAssert() {
Client& c = cc();
if (_globalKill) {
return "interrupted at shutdown";
}
if (c.curop()->maxTimeHasExpired()) {
c.curop()->kill();
return "exceeded time limit";
}
if (c.curop()->killPending()) {
return "interrupted";
}
return "";
}
void KillCurrentOp::reset() {
_globalKill = false;
}
}
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