tests: Add tests for checking race conditions

[urcu.git] / tests / unit / test_wfcqueue.c

diff --git a/tests/unit/test_wfcqueue.c b/tests/unit/test_wfcqueue.c
new file mode 100644 (file)
index 0000000..338aa07
--- /dev/null
+++ b/tests/unit/test_wfcqueue.c
@@ -0,0 +1,119 @@
+/*
+ * test_wfcqueue.c
+ *
+ * Userspace RCU library - test wfcqueue race conditions
+ *
+ * Copyright 2023 - Olivier Dion <odion@efficios.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#define _LGPL_SOURCE
+
+#include <stdlib.h>
+
+#include <pthread.h>
+
+#include <urcu/wfcqueue.h>
+
+#include "tap.h"
+
+#define NR_TESTS 1
+#define NR_PRODUCERS 4
+#define LOOP 100
+
+struct queue {
+       struct cds_wfcq_head head;
+       struct cds_wfcq_tail tail;
+};
+
+static void async_run(struct queue *queue)
+{
+       struct cds_wfcq_node *node = malloc(sizeof(*node));
+
+       cds_wfcq_node_init(node);
+
+       cds_wfcq_enqueue(&queue->head, &queue->tail, node);
+}
+static void do_async_loop(size_t *k, struct queue *queue)
+{
+       struct queue my_queue;
+       enum cds_wfcq_ret state;
+       struct cds_wfcq_node *node, *next;
+
+       cds_wfcq_init(&my_queue.head, &my_queue.tail);
+
+       state = cds_wfcq_splice_blocking(&my_queue.head,
+                                       &my_queue.tail,
+                                       &queue->head,
+                                       &queue->tail);
+
+       if (state == CDS_WFCQ_RET_SRC_EMPTY) {
+               return;
+       }
+
+       __cds_wfcq_for_each_blocking_safe(&my_queue.head,
+                                       &my_queue.tail,
+                                       node, next) {
+               free(node);
+               (*k)++;
+       }
+}
+
+static void *async_loop(void *queue)
+{
+       size_t k = 0;
+
+       while (k < LOOP * NR_PRODUCERS) {
+               (void) poll(NULL, 0, 10);
+               do_async_loop(&k, queue);
+       }
+
+       return NULL;
+}
+
+static void *spawn_jobs(void *queue)
+{
+       for (size_t k = 0; k < LOOP; ++k) {
+               async_run(queue);
+       }
+
+       return 0;
+}
+
+int main(void)
+{
+       pthread_t consumer;
+       pthread_t producers[NR_PRODUCERS];
+       struct queue queue;
+
+       plan_tests(NR_TESTS);
+
+       cds_wfcq_init(&queue.head, &queue.tail);
+       pthread_create(&consumer, NULL, async_loop, &queue);
+
+       for (size_t k = 0; k < NR_PRODUCERS; ++k) {
+               pthread_create(&producers[k], NULL, spawn_jobs, &queue);
+       }
+
+       pthread_join(consumer, NULL);
+       for (size_t k = 0; k < NR_PRODUCERS; ++k) {
+               pthread_join(producers[k], NULL);
+       }
+
+       ok1("No race conditions");
+
+       return exit_status();
+}