tests: periodic clock timer

tests/clock-timer-periodic.c

@@ -0,0 +1,45 @@
+/*
+ * SPDX-License-Identifier: MIT
+ */
+
+#include <sys/types.h>
+#include <stdio.h>
+#include <string.h>
+#include <error.h>
+#include <errno.h>
+#include <unistd.h>
+#include <evenless/thread.h>
+#include <evenless/timer.h>
+#include <evenless/clock.h>
+#include "helpers.h"
+
+int main(int argc, char *argv[])
+{
+	struct itimerspec value, ovalue;
+	struct timespec now;
+	int tmfd, ret, n;
+	__u32 ticks;
+
+	ret = evl_attach_self("periodic-timer:%d", getpid());
+	/*
+	 * evl_init() was indirectly called when attaching, so we may
+	 * create a timer from that point.
+	 */
+	__Tcall_assert(tmfd, evl_new_timer(EVL_CLOCK_MONOTONIC));
+	__Tcall_assert(ret, evl_read_clock(EVL_CLOCK_MONOTONIC, &now));
+	timespec_add_ns(&value.it_value, &now, 1000000000ULL);
+	value.it_interval.tv_sec = 0;
+	value.it_interval.tv_nsec = 5000000;
+	__Tcall_assert(ret, evl_set_timer(tmfd, &value, &ovalue));
+
+	for (n = 0; n < 200; n++) {
+		__Tcall_assert(ret, oob_read(tmfd, &ticks, sizeof(ticks)));
+		__Texpr_assert(ticks == 1);
+	}
+
+	value.it_interval.tv_sec = 0;
+	value.it_interval.tv_nsec = 0;
+	__Tcall_assert(ret, evl_set_timer(tmfd, &value, &ovalue));
+
+	return 0;
+}