X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=src%2Fbasic%2Ftime-util.c;h=de9263bf77fb09602774b959dbb812c8a7fc7b82;hb=ba812e282b3406f478e8ede2b6eb885f61fae6fc;hp=e849ccc57d96841cc3822eeb6293630be941a55b;hpb=5db0e7adf018c82dd63cd21d31dd313dff5561af;p=elogind.git

diff --git a/src/basic/time-util.c b/src/basic/time-util.c
index e849ccc57..de9263bf7 100644
--- a/src/basic/time-util.c
+++ b/src/basic/time-util.c
@@ -91,6 +91,32 @@ dual_timestamp* dual_timestamp_from_monotonic(dual_timestamp *ts, usec_t u) {
 }
 #endif // 0
 
+dual_timestamp* dual_timestamp_from_boottime_or_monotonic(dual_timestamp *ts, usec_t u) {
+        int64_t delta;
+
+        if (u == USEC_INFINITY) {
+                ts->realtime = ts->monotonic = USEC_INFINITY;
+                return ts;
+        }
+        ts->realtime = now(CLOCK_REALTIME);
+        ts->monotonic = now(CLOCK_MONOTONIC);
+
+        delta = (int64_t) now(clock_boottime_or_monotonic()) - (int64_t) u;
+
+        if ((int64_t) ts->realtime > delta)
+                ts->realtime -= delta;
+        else
+                ts->realtime = 0;
+
+        if ((int64_t) ts->monotonic > delta)
+                ts->monotonic -= delta;
+        else
+                ts->monotonic = 0;
+
+        return ts;
+}
+
+
 usec_t timespec_load(const struct timespec *ts) {
         assert(ts);