Lines Matching defs:head
67 const UInt32 head = dataQueue->head; // volatile
74 if ( tail >= head )
91 else if ( head > entrySize ) // Is there enough room at the beginning?
94 // up to the head.
120 // Do not allow the tail to catch up to the head when the queue is full.
123 if ( (head - tail) > entrySize )
142 if ( ( head == tail ) || ( dataQueue->head == tail ) || queueFull) {
159 if (dataQueue->head != dataQueue->tail)