C++ (Cpp) binary_protocol_gray_dequeue Examples

Example #1

File: sgen-gray.c Project: Lixire/mono

GrayQueueEntry
sgen_gray_object_dequeue (SgenGrayQueue *queue)
{
	GrayQueueEntry entry;

	HEAVY_STAT (stat_gray_queue_dequeue_slow_path ++);

	if (sgen_gray_object_queue_is_empty (queue)) {
		entry.obj = NULL;
		return entry;
	}

	STATE_ASSERT (queue->first, GRAY_QUEUE_SECTION_STATE_ENQUEUED);
	SGEN_ASSERT (9, queue->cursor >= GRAY_FIRST_CURSOR_POSITION (queue->first), "gray queue %p underflow", queue);

	entry = *queue->cursor--;

#ifdef SGEN_HEAVY_BINARY_PROTOCOL
	binary_protocol_gray_dequeue (queue, queue->cursor + 1, entry.obj);
#endif

	if (G_UNLIKELY (queue->cursor < GRAY_FIRST_CURSOR_POSITION (queue->first))) {
		GrayQueueSection *section = queue->first;
		queue->first = section->next;
		section->next = queue->free_list;

		STATE_TRANSITION (section, GRAY_QUEUE_SECTION_STATE_ENQUEUED, GRAY_QUEUE_SECTION_STATE_FREE_LIST);

		queue->free_list = section;
		queue->cursor = queue->first ? queue->first->entries + queue->first->size - 1 : NULL;
	}

	return entry;
}

Example #2

File: sgen-gray.c Project: medo64/mono

GrayQueueEntry
sgen_gray_object_dequeue (SgenGrayQueue *queue, gboolean is_parallel)
{
	GrayQueueEntry entry;

	HEAVY_STAT (stat_gray_queue_dequeue_slow_path ++);

	if (sgen_gray_object_queue_is_empty (queue)) {
		entry.obj = NULL;
		return entry;
	}

	STATE_ASSERT (queue->first, GRAY_QUEUE_SECTION_STATE_ENQUEUED);
	SGEN_ASSERT (9, queue->cursor >= GRAY_FIRST_CURSOR_POSITION (queue->first), "gray queue %p underflow", queue);

	entry = *queue->cursor--;

#ifdef SGEN_HEAVY_BINARY_PROTOCOL
	binary_protocol_gray_dequeue (queue, queue->cursor + 1, entry.obj);
#endif

	if (G_UNLIKELY (queue->cursor < GRAY_FIRST_CURSOR_POSITION (queue->first))) {
		GrayQueueSection *section;
		gint32 old_num_sections = 0;

		if (is_parallel)
			old_num_sections = mono_atomic_dec_i32 (&queue->num_sections);
		else
			queue->num_sections--;

		if (is_parallel && old_num_sections <= 0) {
			mono_os_mutex_lock (&queue->steal_mutex);
		}

		section = queue->first;
		queue->first = section->next;
		if (queue->first) {
			queue->first->prev = NULL;
		} else {
			queue->last = NULL;
			SGEN_ASSERT (0, !old_num_sections, "Why do we have an inconsistent number of sections ?");
		}
		section->next = queue->free_list;

		STATE_TRANSITION (section, GRAY_QUEUE_SECTION_STATE_ENQUEUED, GRAY_QUEUE_SECTION_STATE_FREE_LIST);

		queue->free_list = section;
		queue->cursor = queue->first ? queue->first->entries + queue->first->size - 1 : NULL;

		if (is_parallel && old_num_sections <= 0) {
			mono_os_mutex_unlock (&queue->steal_mutex);
		}
	}

	return entry;
}