9 	volatile uint32_t   head;  member
289 	return dataQueue && (dataQueue->head != dataQueue->tail);  in IsDataAvailable()
308 	headOffset = __c11_atomic_load((_Atomic uint32_t *)&dataQueue->head, __ATOMIC_RELAXED);  in Peek()
312 		IODataQueueEntry *  head        = NULL;  in Peek()  local
320 		head     = (IODataQueueEntry *)((uintptr_t)dataQueue->queue + headOffset);  in Peek()
321 		callerDataSize = head->size;  in Peek()
354 			callback(&head->data, callerDataSize);  in Peek()
395 	headOffset = __c11_atomic_load((_Atomic uint32_t *)&dataQueue->head, __ATOMIC_RELAXED);  in DequeueWithCoalesce()
399 		IODataQueueEntry *  head        = NULL;  in DequeueWithCoalesce()  local
407 		head = (IODataQueueEntry *)((uintptr_t)dataQueue->queue + headOffset);  in DequeueWithCoalesce()
408 		callerDataSize = head->size;  in DequeueWithCoalesce()
437 			entry = head;  in DequeueWithCoalesce()
459 	__c11_atomic_store((_Atomic uint32_t *)&dataQueue->head, newHeadOffset, __ATOMIC_RELEASE);  in DequeueWithCoalesce()
495 	uint32_t            head;  in EnqueueWithCoalesce()  local
511 	head = __c11_atomic_load((_Atomic uint32_t *)&dataQueue->head, __ATOMIC_ACQUIRE);  in EnqueueWithCoalesce()
524 	if (queueSize < tail || queueSize < head) {  in EnqueueWithCoalesce()
529 	if (tail >= head) {  in EnqueueWithCoalesce()
544 		} else if (head > entrySize) { // Is there enough room at the beginning?  in EnqueueWithCoalesce()
570 		if ((head - tail) > entrySize) {  in EnqueueWithCoalesce()
589 		if (tail != head) {  in EnqueueWithCoalesce()
600 			head = __c11_atomic_load((_Atomic uint32_t *)&dataQueue->head, __ATOMIC_RELAXED);  in EnqueueWithCoalesce()
603 		if (tail == head) {  in EnqueueWithCoalesce()
627 	uint32_t            head;  in CanEnqueueData()  local
641 	head = __c11_atomic_load((_Atomic uint32_t *)&dataQueue->head, __ATOMIC_ACQUIRE);  in CanEnqueueData()
654 	if (queueSize < tail || queueSize < head) {  in CanEnqueueData()
658 	if (tail >= head) {  in CanEnqueueData()
661 		uint32_t beginElements = head / entrySize;  in CanEnqueueData()
667 		uint32_t space = head - tail - 1;  in CanEnqueueData()