bool NOINLINE_DECL DurableImpl::_aCommitIsNeeded() {
switch (Lock::isLocked()) {
case '\0': {
// lock_w() can call in this state at times if a commit is needed before attempting
// its lock.
Lock::GlobalRead r;
if( commitJob.bytes() < UncommittedBytesLimit ) {
// someone else beat us to it
//
// note before of 'R' state, many threads can pile-in to this point and
// still fall through to below, and they will exit without doing work later
// once inside groupCommitMutex. this is all likely inefficient. maybe
// groupCommitMutex should be on top.
return false;
}
commitNow();
return true;
}
case 'w': {
if( Lock::atLeastReadLocked("local") ) {
error() << "can't commitNow from commitIfNeeded, as we are in local db lock" << endl;
printStackTrace();
dassert(false); // this will make _DEBUG builds terminate. so we will notice in buildbot.
return false;
}
if( Lock::atLeastReadLocked("admin") ) {
error() << "can't commitNow from commitIfNeeded, as we are in admin db lock" << endl;
printStackTrace();
dassert(false);
return false;
}
LOG(1) << "commitIfNeeded upgrading from shared write to exclusive write state"
<< endl;
Lock::DBWrite::UpgradeToExclusive ex;
if (ex.gotUpgrade()) {
commitNow();
}
return true;
}
case 'W':
case 'R':
commitNow();
return true;
case 'r':
return false;
default:
fassertFailed(16434); // unknown lock type
}
}
bool NOINLINE_DECL DurableImpl::_aCommitIsNeeded() {
switch (Lock::isLocked()) {
case '\0': {
DEV log() << "commitIfNeeded but we are unlocked that is ok but why do we get here" << endl;
Lock::GlobalRead r;
if( commitJob.bytes() < UncommittedBytesLimit ) {
// someone else beat us to it
return false;
}
commitNow();
return true;
}
case 'w': {
if( Lock::atLeastReadLocked("local") ) {
error() << "can't commitNow from commitIfNeeded, as we are in local db lock" << endl;
printStackTrace();
dassert(false); // this will make _DEBUG builds terminate. so we will notice in buildbot.
return false;
}
if( Lock::atLeastReadLocked("admin") ) {
error() << "can't commitNow from commitIfNeeded, as we are in admin db lock" << endl;
printStackTrace();
dassert(false);
return false;
}
LOG(1) << "commitIfNeeded upgrading from shared write to exclusive write state"
<< endl;
Lock::DBWrite::UpgradeToExclusive ex;
if (ex.gotUpgrade()) {
commitNow();
}
return true;
}
case 'W':
case 'R':
commitNow();
return true;
case 'r':
return false;
default:
fassertFailed(16434); // unknown lock type
}
}
