/* call when cursor's location changes so that we can update the
cursorsbylocation map. if you are locked and internally iterating, only
need to call when you are ready to "unlock".
*/
void ClientCursor::updateLocation() {
verify( _cursorid );
_idleAgeMillis = 0;
_c->prepareToYield();
DiskLoc cl = _c->refLoc();
if ( lastLoc() == cl ) {
//log() << "info: lastloc==curloc " << ns << '\n';
}
else {
recursive_scoped_lock lock(ccmutex);
setLastLoc_inlock(cl);
}
}
/* call when cursor's location changes so that we can update the
cursorsbylocation map. if you are locked and internally iterating, only
need to call when you are ready to "unlock".
*/
void ClientCursor::updateLocation() {
assert( cursorid );
_idleAgeMillis = 0;
DiskLoc cl = c->refLoc();
if ( lastLoc() == cl ) {
//log() << "info: lastloc==curloc " << ns << '\n';
} else {
recursive_scoped_lock lock(ccmutex);
setLastLoc_inlock(cl);
}
// may be necessary for MultiCursor even when cl hasn't changed
c->noteLocation();
}
ClientCursor::~ClientCursor() {
assert( pos != -2 );
{
recursive_scoped_lock lock(ccmutex);
setLastLoc_inlock( DiskLoc() ); // removes us from bylocation multimap
clientCursorsById.erase(cursorid);
// defensive:
(CursorId&) cursorid = -1;
pos = -2;
}
}
ClientCursor::~ClientCursor() {
if( _pos == -2 ) {
// defensive: destructor called twice
wassert(false);
return;
}
{
recursive_scoped_lock lock(ccmutex);
setLastLoc_inlock( DiskLoc() ); // removes us from bylocation multimap
clientCursorsById.erase(_cursorid);
// defensive:
(CursorId&)_cursorid = -1;
_pos = -2;
}
}
ClientCursor::~ClientCursor() {
if( _pos == -2 ) {
// defensive: destructor called twice
wassert(false);
return;
}
{
recursive_scoped_lock lock(ccmutex);
if (NULL != _c.get()) {
// Removes 'this' from bylocation map
setLastLoc_inlock( DiskLoc() );
}
clientCursorsById.erase(_cursorid);
// defensive:
_cursorid = INVALID_CURSOR_ID;
_pos = -2;
_pinValue = 0;
}
}
