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1c87adb3 MJ |
1 | // SPDX-FileCopyrightText: 2013 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
2 | // | |
3 | // SPDX-License-Identifier: MIT | |
4 | ||
53a77191 | 5 | /* |
53a77191 MD |
6 | * This example shows how to pop all nodes from a wfstack. |
7 | */ | |
8 | ||
9 | #include <stdio.h> | |
10 | #include <stdlib.h> | |
11 | ||
12 | #include <urcu/wfstack.h> /* Wait-free stack */ | |
13 | #include <urcu/compiler.h> /* For CAA_ARRAY_SIZE */ | |
14 | ||
15 | /* | |
16 | * Nodes populated into the stack. | |
17 | */ | |
18 | struct mynode { | |
19 | int value; /* Node content */ | |
20 | struct cds_wfs_node node; /* Chaining in stack */ | |
21 | }; | |
22 | ||
70469b43 | 23 | int main(void) |
53a77191 MD |
24 | { |
25 | int values[] = { -5, 42, 36, 24, }; | |
26 | struct cds_wfs_stack mystack; /* Stack */ | |
27 | unsigned int i; | |
28 | int ret = 0; | |
bb641aa3 | 29 | struct cds_wfs_node *snode, *sn; |
53a77191 MD |
30 | struct cds_wfs_head *shead; |
31 | ||
32 | cds_wfs_init(&mystack); | |
33 | ||
34 | /* | |
35 | * Push nodes. | |
36 | */ | |
37 | for (i = 0; i < CAA_ARRAY_SIZE(values); i++) { | |
38 | struct mynode *node; | |
39 | ||
40 | node = malloc(sizeof(*node)); | |
41 | if (!node) { | |
42 | ret = -1; | |
43 | goto end; | |
44 | } | |
45 | ||
46 | cds_wfs_node_init(&node->node); | |
47 | node->value = values[i]; | |
48 | cds_wfs_push(&mystack, &node->node); | |
49 | } | |
50 | ||
51 | /* | |
52 | * Pop all nodes from mystack into shead. The head can the be | |
53 | * used for iteration. | |
54 | */ | |
55 | shead = cds_wfs_pop_all_blocking(&mystack); | |
56 | ||
57 | /* | |
58 | * Show the stack content, iterate in reverse order of push, | |
bb641aa3 MD |
59 | * from newest to oldest. Use cds_wfs_for_each_blocking_safe() |
60 | * so we can free the nodes as we iterate. | |
53a77191 MD |
61 | */ |
62 | printf("mystack content:"); | |
bb641aa3 | 63 | cds_wfs_for_each_blocking_safe(shead, snode, sn) { |
53a77191 MD |
64 | struct mynode *node = |
65 | caa_container_of(snode, struct mynode, node); | |
66 | printf(" %d", node->value); | |
bb641aa3 | 67 | free(node); |
53a77191 MD |
68 | } |
69 | printf("\n"); | |
70 | end: | |
6acc6ad4 | 71 | cds_wfs_destroy(&mystack); |
53a77191 MD |
72 | return ret; |
73 | } |