Signed-off-by: Hans de Goede <[email protected]>
---
 src/timer.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/src/timer.c b/src/timer.c
index 65fdd17..4f465f3 100644
--- a/src/timer.c
+++ b/src/timer.c
@@ -22,6 +22,7 @@
 
 #include <assert.h>
 #include <errno.h>
+#include <inttypes.h>
 #include <string.h>
 #include <sys/timerfd.h>
 #include <unistd.h>
@@ -65,6 +66,20 @@ libinput_timer_arm_timer_fd(struct libinput *libinput)
 void
 libinput_timer_set(struct libinput_timer *timer, uint64_t expire)
 {
+#ifndef NDEBUG
+       struct timespec ts;
+
+       if (clock_gettime(CLOCK_MONOTONIC, &ts) == 0) {
+               uint64_t now = ts.tv_sec * 1000ULL + ts.tv_nsec / 1000000;
+               if (abs(expire - now) > 5000)
+                       log_bug_libinput("timer offset more then 5s, now %"
+                                        PRIu64 " expire %" PRIu64 "\n",
+                                        now, expire);
+       } else {
+               log_error("clock_gettime error: %s\n", strerror(errno));
+       }
+#endif
+
        assert(expire);
 
        if (!timer->expire)
-- 
2.0.0

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