C++ (Cpp) _atomic_fetch示例

示例#1

文件： cairo-clip.c 项目： LittleForker/mozilla-central

static void *
_freed_pool_get (freed_pool_t *pool)
{
    void *ptr;
    int i;

    i = pool->top - 1;
    if (i < 0)
	i = 0;

    ptr = _atomic_fetch (&pool->pool[i]);
    if (ptr != NULL) {
	pool->top = i;
	return ptr;
    }

    /* either empty or contended */
    for (i = ARRAY_LENGTH (pool->pool); i--;) {
	ptr = _atomic_fetch (&pool->pool[i]);
	if (ptr != NULL) {
	    pool->top = i;
	    return ptr;
	}
    }

    /* empty */
    pool->top = 0;
    return NULL;
}

示例#2

文件： cairo-freed-pool.c 项目： MekliCZ/positron

void *
_freed_pool_get_search (freed_pool_t *pool)
{
    void *ptr;
    int i;

    for (i = ARRAY_LENGTH (pool->pool); i--;) {
	ptr = _atomic_fetch (&pool->pool[i]);
	if (ptr != NULL) {
	    _cairo_atomic_int_set_relaxed (&pool->top, i);
	    return ptr;
	}
    }

    /* empty */
    _cairo_atomic_int_set_relaxed (&pool->top, 0);
    return NULL;
}