timer: Introduce osmo_clock_gettime to override clock_gettime
Change-Id: I5bebc6e01fc9d238065bc2517058f0ba85620349
diff --git a/tests/timer/clk_override_test.c b/tests/timer/clk_override_test.c
new file mode 100644
index 0000000..308e821
--- /dev/null
+++ b/tests/timer/clk_override_test.c
@@ -0,0 +1,89 @@
+/*
+ * (C) 2008 by Holger Hans Peter Freyther <zecke@selfish.org>
+ * (C) 2011 by Harald Welte <laforge@gnumonks.org>
+ * All Rights Reserved
+ *
+ * Authors: Holger Hans Peter Freyther <zecke@selfish.org>
+ * Pablo Neira Ayuso <pablo@gnumonks.org>
+ *
+ * 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.
+ *
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+
+#include <osmocom/core/talloc.h>
+#include <osmocom/core/timer.h>
+#include <osmocom/core/select.h>
+#include <osmocom/core/linuxlist.h>
+#include <osmocom/core/timer_compat.h>
+
+int main(int argc, char *argv[])
+{
+
+ struct timespec ts1 = { 123, 456 }, ts2 = {1, 200};
+ struct timespec read1, read2, res;
+ struct timespec *mono;
+
+ osmo_clock_gettime(CLOCK_BOOTTIME, &read1);
+ usleep(500);
+ osmo_clock_gettime(CLOCK_BOOTTIME, &read2);
+ if (!timespeccmp(&read2, &read1, >))
+ return EXIT_FAILURE;
+ printf("Non implemented clocks work fine\n");
+
+ osmo_clock_gettime(CLOCK_MONOTONIC, &read1);
+ usleep(500);
+ osmo_clock_gettime(CLOCK_MONOTONIC, &read2);
+ if (!timespeccmp(&read2, &read1, >))
+ return EXIT_FAILURE;
+ printf("Monotonic clock is working fine by default\n");
+
+ osmo_clock_override_enable(CLOCK_MONOTONIC, true);
+ printf("Monotonic clock override enabled\n");
+
+ mono = osmo_clock_override_gettimespec(CLOCK_MONOTONIC);
+ if (timespecisset(mono))
+ return EXIT_FAILURE;
+ printf("Monotonic override is cleared by default\n");
+
+ memcpy(mono, &ts1, sizeof(struct timespec));
+ osmo_clock_gettime(CLOCK_MONOTONIC, &read1);
+ if (!timespeccmp(&ts1, &read1, ==))
+ return EXIT_FAILURE;
+ printf("Monotonic clock can be overriden\n");
+
+ osmo_clock_override_add(CLOCK_MONOTONIC, ts2.tv_sec, ts2.tv_nsec);
+ osmo_clock_gettime(CLOCK_MONOTONIC, &read1);
+ timespecadd(&ts2, &ts1, &res);
+ if (!timespeccmp(&res, &read1, ==))
+ return EXIT_FAILURE;
+ printf("osmo_clock_override_add works fine.\n");
+
+ osmo_clock_override_enable(CLOCK_MONOTONIC, false);
+ printf("Monotonic clock override disabled\n");
+
+ osmo_clock_gettime(CLOCK_MONOTONIC, &read1);
+ usleep(500);
+ osmo_clock_gettime(CLOCK_MONOTONIC, &read2);
+ if (!timespeccmp(&read2, &read1, >))
+ return EXIT_FAILURE;
+ printf("Monotonic clock is working fine after enable+disable.\n");
+
+ return 0;
+}