36 	isc_astack_t *stack = isc_mem_get(  in isc_astack_new()  local
39 	*stack = (isc_astack_t){  in isc_astack_new()
42 	isc_mem_attach(mctx, &stack->mctx);  in isc_astack_new()
43 	memset(stack->nodes, 0, size * sizeof(uintptr_t));  in isc_astack_new()
44 	isc_mutex_init(&stack->lock);  in isc_astack_new()
45 	return (stack);  in isc_astack_new()
49 isc_astack_trypush(isc_astack_t *stack, void *obj) {  in isc_astack_trypush()  argument
50 	if (!isc_mutex_trylock(&stack->lock)) {  in isc_astack_trypush()
51 		if (stack->pos >= stack->size) {  in isc_astack_trypush()
52 			UNLOCK(&stack->lock);  in isc_astack_trypush()
55 		stack->nodes[stack->pos++] = (uintptr_t)obj;  in isc_astack_trypush()
56 		UNLOCK(&stack->lock);  in isc_astack_trypush()
64 isc_astack_pop(isc_astack_t *stack) {  in isc_astack_pop()  argument
65 	LOCK(&stack->lock);  in isc_astack_pop()
67 	if (stack->pos == 0) {  in isc_astack_pop()
70 		rv = stack->nodes[--stack->pos];  in isc_astack_pop()
72 	UNLOCK(&stack->lock);  in isc_astack_pop()
77 isc_astack_destroy(isc_astack_t *stack) {  in isc_astack_destroy()  argument
78 	LOCK(&stack->lock);  in isc_astack_destroy()
79 	REQUIRE(stack->pos == 0);  in isc_astack_destroy()
80 	UNLOCK(&stack->lock);  in isc_astack_destroy()
82 	isc_mutex_destroy(&stack->lock);  in isc_astack_destroy()
84 	isc_mem_putanddetach(&stack->mctx, stack,  in isc_astack_destroy()
86 				     stack->size * sizeof(uintptr_t));  in isc_astack_destroy()