+#endif
+#ifndef SYNC_PAINT
+ pthread_mutex_lock(&mutex);
+#endif
+ if ( rp != wp )
+ {
+ gOpcode o(queue[rp++]);
+ if ( rp == MAXSIZE )
+ rp=0;
+#ifndef SYNC_PAINT
+ pthread_mutex_unlock(&mutex);
+#endif
+ if (o.opcode==gOpcode::shutdown)
+ break;
+ else if (o.opcode==gOpcode::notify)
+ need_notify = 1;
+ else
+ {
+ o.dc->exec(&o);
+ // o.dc is a gDC* filled with grabref... so we must release it here
+ o.dc->Release();
+ }
+ }
+ else
+ {
+ if (need_notify)
+ {
+ need_notify = 0;
+ m_notify_pump.send(1);
+ }
+#ifndef SYNC_PAINT
+ while(rp == wp)
+ pthread_cond_wait(&cond, &mutex);
+ pthread_mutex_unlock(&mutex);
+#endif
+ }