X-Git-Url: http://git.liburcu.org/?a=blobdiff_plain;f=doc%2Fexamples%2Fwfcqueue%2Fcds_wfcq_enqueue.c;fp=doc%2Fexamples%2Fwfcqueue%2Fcds_wfcq_enqueue.c;h=b5dc1471f6bbcc109d300be81a3254456044ab3d;hb=483370758193a1d58f4668c3d53ae2b5fe1e66c3;hp=0000000000000000000000000000000000000000;hpb=db017c417c48ec966c30a3a7a94291e227c4878a;p=urcu.git diff --git a/doc/examples/wfcqueue/cds_wfcq_enqueue.c b/doc/examples/wfcqueue/cds_wfcq_enqueue.c new file mode 100644 index 0000000..b5dc147 --- /dev/null +++ b/doc/examples/wfcqueue/cds_wfcq_enqueue.c @@ -0,0 +1,72 @@ +/* + * Copyright (C) 2013 Mathieu Desnoyers + * + * THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED + * OR IMPLIED. ANY USE IS AT YOUR OWN RISK. + * + * Permission is hereby granted to use or copy this program for any + * purpose, provided the above notices are retained on all copies. + * Permission to modify the code and to distribute modified code is + * granted, provided the above notices are retained, and a notice that + * the code was modified is included with the above copyright notice. + * + * This example shows how to enqueue nodes into a wfcqueue. + */ + +#include +#include + +#include /* Wait-free concurrent queue */ +#include /* For CAA_ARRAY_SIZE */ + +/* + * Nodes populated into the queue. + */ +struct mynode { + int value; /* Node content */ + struct cds_wfcq_node node; /* Chaining in queue */ +}; + +int main(int argc, char **argv) +{ + int values[] = { -5, 42, 36, 24, }; + struct cds_wfcq_head myqueue_head; /* Queue head */ + struct cds_wfcq_tail myqueue_tail; /* Queue tail */ + unsigned int i; + int ret = 0; + struct cds_wfcq_node *qnode; + + cds_wfcq_init(&myqueue_head, &myqueue_tail); + + /* + * Adding nodes to the linked-list. Safe against concurrent + * RCU traversals, require mutual exclusion with list updates. + */ + for (i = 0; i < CAA_ARRAY_SIZE(values); i++) { + struct mynode *node; + + node = malloc(sizeof(*node)); + if (!node) { + ret = -1; + goto end; + } + + cds_wfcq_node_init(&node->node); + node->value = values[i]; + cds_wfcq_enqueue(&myqueue_head, &myqueue_tail, + &node->node); + } + + /* + * Show the queue content. + */ + printf("myqueue content:"); + __cds_wfcq_for_each_blocking(&myqueue_head, &myqueue_tail, qnode) { + struct mynode *node = + caa_container_of(qnode, struct mynode, node); + printf(" %d", node->value); + } + printf("\n"); +end: + return ret; +}