C++ (Cpp) lf_lifo_init Examples

Example #1

File: slab_arena.c Project: nunb/tarantool

int
slab_arena_create(struct slab_arena *arena, struct quota *quota,
		  size_t prealloc, uint32_t slab_size, int flags)
{
	assert(flags & (MAP_PRIVATE | MAP_SHARED));
	lf_lifo_init(&arena->cache);
	/*
	 * Round up the user supplied data - it can come in
	 * directly from the configuration file. Allow
	 * zero-size arena for testing purposes.
	 */
	arena->slab_size = small_round(MAX(slab_size, SLAB_MIN_SIZE));

	arena->quota = quota;
	/** Prealloc can not be greater than the quota */
	prealloc = MIN(prealloc, quota_total(quota));
	/** Extremely large sizes can not be aligned properly */
	prealloc = MIN(prealloc, SIZE_MAX - arena->slab_size);
	/* Align prealloc around a fixed number of slabs. */
	arena->prealloc = small_align(prealloc, arena->slab_size);

	arena->used = 0;

	arena->flags = flags;

	if (arena->prealloc) {
		arena->arena = mmap_checked(arena->prealloc,
					    arena->slab_size,
					    arena->flags);
	} else {
		arena->arena = NULL;
	}
	return arena->prealloc && !arena->arena ? -1 : 0;
}

Example #2

File: lf_lifo.c Project: mantyr/small

int main()
{
	struct lf_lifo head;
	void *val1 = mmap_aligned(MAP_SIZE);
	void *val2 = mmap_aligned(MAP_SIZE);
	void *val3 = mmap_aligned(MAP_SIZE);
	lf_lifo_init(&head);

	fail_unless(lf_lifo_pop(&head) == NULL);
	fail_unless(lf_lifo_pop(lf_lifo_push(&head, val1)) == val1);
	fail_unless(lf_lifo_pop(lf_lifo_push(&head, val1)) == val1);
	lf_lifo_push(lf_lifo_push(lf_lifo_push(&head, val1), val2), val3);
	fail_unless(lf_lifo_pop(&head) == val3);
	fail_unless(lf_lifo_pop(&head) == val2);
	fail_unless(lf_lifo_pop(&head) == val1);
	fail_unless(lf_lifo_pop(&head) == NULL);

	lf_lifo_init(&head);

	/* Test overflow of ABA counter. */

	int i = 0;
	do {
		lf_lifo_push(&head, val1);
		fail_unless(lf_lifo_pop(&head) == val1);
		fail_unless(lf_lifo_pop(&head) == NULL);
		i++;
	} while (head.next != 0);

	munmap(val1, MAP_SIZE);
	munmap(val2, MAP_SIZE);
	munmap(val3, MAP_SIZE);

	printf("success\n");

	return 0;
}

Example #3

File: slab_arena.c Project: bigbes/tarantool

int
slab_arena_create(struct slab_arena *arena,
		  size_t prealloc, size_t maxalloc,
		  uint32_t slab_size, int flags)
{
	assert(flags & (MAP_PRIVATE | MAP_SHARED));
	lf_lifo_init(&arena->cache);
	/*
	 * Round up the user supplied data - it can come in
	 * directly from the configuration file. Allow
	 * zero-size arena for testing purposes.
	 */
	arena->slab_size = small_round(MAX(slab_size, SLAB_MIN_SIZE));

	if (maxalloc) {
		arena->maxalloc = small_round(MAX(maxalloc,
						      arena->slab_size));
	} else {
		arena->maxalloc = 0;
	}

	/* Align arena around a fixed number of slabs. */
	arena->prealloc = small_align(small_round(prealloc),
				      arena->slab_size);
	if (arena->maxalloc < arena->prealloc)
		arena->prealloc = arena->maxalloc;

	arena->used = 0;

	arena->flags = flags;

	if (arena->prealloc) {
		arena->arena = mmap_checked(arena->prealloc,
					    arena->slab_size,
					    arena->flags);
	} else {
		arena->arena = NULL;
	}
	return arena->prealloc && !arena->arena ? -1 : 0;
}