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authordimitri staessens <dimitri.staessens@intec.ugent.be>2016-11-24 19:25:53 +0100
committerdimitri staessens <dimitri.staessens@intec.ugent.be>2016-11-25 15:20:39 +0100
commit0c2a5d4cfc662cffc76f6e9ff5ade301696ada92 (patch)
tree4ba4d14a67f8b73facd0d5b116f1c6a9b742d2a0 /src/ipcpd/tests/timerwheel_test.c
parent1475be46f1a2eba8d14b434a0a4bdddd9295f6f4 (diff)
downloadouroboros-0c2a5d4cfc662cffc76f6e9ff5ade301696ada92.tar.gz
ouroboros-0c2a5d4cfc662cffc76f6e9ff5ade301696ada92.zip
ipcpd: Add timerwheel
The timerwheel can be used to defer work to a certain timeslot in the future.
Diffstat (limited to 'src/ipcpd/tests/timerwheel_test.c')
-rw-r--r--src/ipcpd/tests/timerwheel_test.c92
1 files changed, 92 insertions, 0 deletions
diff --git a/src/ipcpd/tests/timerwheel_test.c b/src/ipcpd/tests/timerwheel_test.c
new file mode 100644
index 00000000..615e6e41
--- /dev/null
+++ b/src/ipcpd/tests/timerwheel_test.c
@@ -0,0 +1,92 @@
+/*
+ * Ouroboros - Copyright (C) 2016
+ *
+ * Test of the timer wheel
+ *
+ * Dimitri Staessens <dimitri.staessens@intec.ugent.be>
+ *
+ * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include "timerwheel.c"
+
+#include <pthread.h>
+#include <time.h>
+#include <stdlib.h>
+
+#define MAX_ELEMENTS 500
+#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;
+
+ (void) argc;
+ (void) argv;
+
+ srand(time(NULL));
+
+ total = 0;
+
+ resolution = rand() % (MAX_RESOLUTION - 1) + 1;
+ elements = rand() % (MAX_ELEMENTS - 10) + 10;
+
+ tw = timerwheel_create(resolution, resolution * elements);
+ if (tw == NULL)
+ 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);
+ int var = rand() % 5;
+ check_total += var;
+ timerwheel_add(tw,
+ (void (*)(void *)) add,
+ (void *) &var,
+ sizeof(var),
+ delay);
+ }
+
+ nanosleep(&wait, NULL);
+
+ timerwheel_destroy(tw);
+
+ if (total != check_total)
+ return -1;
+
+ return 0;
+}