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-rw-r--r--src/lib/tests/timerwheel_test.c106
1 files changed, 106 insertions, 0 deletions
diff --git a/src/lib/tests/timerwheel_test.c b/src/lib/tests/timerwheel_test.c
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+++ b/src/lib/tests/timerwheel_test.c
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+/*
+ * Ouroboros - Copyright (C) 2016 - 2017
+ *
+ * Test of the timer wheel
+ *
+ * Dimitri Staessens <dimitri.staessens@ugent.be>
+ * Sander Vrijders <sander.vrijders@ugent.be>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * 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., http://www.fsf.org/about/contact/.
+ */
+
+#include "timerwheel.c"
+
+#include <pthread.h>
+#include <time.h>
+#include <stdlib.h>
+#include <stdio.h>
+
+#define MAX_ELEMENTS 100
+#define MAX_RESOLUTION 10 /* ms */
+#define MAX_ADDITIONS 1000
+
+int total;
+
+int add(void * o)
+{
+ total += *((int *) o);
+ return 0;
+}
+
+int timerwheel_test(int argc, char ** argv)
+{
+ struct timerwheel * tw;
+ long resolution;
+ long elements;
+ struct timespec wait;
+
+ int additions;
+
+ int check_total = 0;
+
+ int i;
+ int var = 5;
+
+ struct tw_f * f;
+
+ (void) argc;
+ (void) argv;
+
+ total = 0;
+
+ srand(time(NULL));
+
+ resolution = rand() % (MAX_RESOLUTION - 1) + 1;
+ elements = rand() % (MAX_ELEMENTS - 10) + 10;
+
+ tw = timerwheel_create(resolution, resolution * elements);
+ if (tw == NULL) {
+ printf("Failed to create timerwheel.\n");
+ return -1;
+ }
+
+ wait.tv_sec = (resolution * elements) / 1000;
+ wait.tv_nsec = ((resolution * elements) % 1000) * MILLION;
+
+ additions = rand() % MAX_ADDITIONS + 1000;
+
+ for (i = 0; i < additions; ++i) {
+ int delay = rand() % (resolution * elements);
+ check_total += var;
+ f = timerwheel_start(tw,
+ (void (*)(void *)) add,
+ (void *) &var,
+ delay);
+ if (f == NULL) {
+ printf("Failed to add function.");
+ return -1;
+ }
+ }
+
+ nanosleep(&wait, NULL);
+
+ /* On some systems and VMs, the scheduler may be too slow. */
+ if (total != check_total)
+ nanosleep(&wait, NULL);
+
+ timerwheel_destroy(tw);
+
+ if (total != check_total) {
+ printf("Totals do not match.\n");
+ return -1;
+ }
+
+ return 0;
+}