Fix: examples: use destroy API for queues/stacks
[urcu.git] / doc / examples / lfstack / cds_lfs_pop_blocking.c
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1/*
2 * Copyright (C) 2013 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
3 *
4 * THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
5 * OR IMPLIED. ANY USE IS AT YOUR OWN RISK.
6 *
7 * Permission is hereby granted to use or copy this program for any
8 * purpose, provided the above notices are retained on all copies.
9 * Permission to modify the code and to distribute modified code is
10 * granted, provided the above notices are retained, and a notice that
11 * the code was modified is included with the above copyright notice.
12 *
13 * This example shows how to pop nodes from a lfstack.
14 */
15
16#include <stdio.h>
17#include <stdlib.h>
18
19#include <urcu/lfstack.h> /* Wait-free stack */
20#include <urcu/compiler.h> /* For CAA_ARRAY_SIZE */
21
22/*
23 * Nodes populated into the stack.
24 */
25struct mynode {
26 int value; /* Node content */
27 struct cds_lfs_node node; /* Chaining in stack */
28};
29
30int main(int argc, char **argv)
31{
32 int values[] = { -5, 42, 36, 24, };
33 struct cds_lfs_stack mystack; /* Stack */
34 unsigned int i;
35 int ret = 0;
36
37 cds_lfs_init(&mystack);
38
39 /*
40 * Push nodes.
41 */
42 for (i = 0; i < CAA_ARRAY_SIZE(values); i++) {
43 struct mynode *node;
44
45 node = malloc(sizeof(*node));
46 if (!node) {
47 ret = -1;
48 goto end;
49 }
50
51 cds_lfs_node_init(&node->node);
52 node->value = values[i];
53 cds_lfs_push(&mystack, &node->node);
54 }
55
56 /*
57 * Pop nodes from the stack, one by one, from newest to oldest.
58 */
59 printf("pop each mystack node:");
60 for (;;) {
61 struct cds_lfs_node *snode;
62 struct mynode *node;
63
64 snode = cds_lfs_pop_blocking(&mystack);
65 if (!snode) {
66 break;
67 }
68 node = caa_container_of(snode, struct mynode, node);
69 printf(" %d", node->value);
70 free(node);
71 }
72 printf("\n");
73end:
6acc6ad4 74 cds_lfs_destroy(&mystack);
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75 return ret;
76}
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