runtime: fix semasleep() duration for openbsd

The timespec passed to thrsleep() needs to be an absolute/realtime
value, so add the current nanotime to ns.

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/5374048

diff --git a/src/pkg/runtime/openbsd/thread.c b/src/pkg/runtime/openbsd/thread.c
index fd8cbfd033f787476f2c3cb6e404bd66f84920a5..995a46edd66efa8ffc58f4634995837b018edfc0 100644 (file)
--- a/src/pkg/runtime/openbsd/thread.c
+++ b/src/pkg/runtime/openbsd/thread.c
@@ -79,6 +79,7 @@ runtime·semasleep(int64 ns)
                        if(ns < 0)
                                runtime·thrsleep(&m->waitsemacount, 0, nil, &m->waitsemalock);
                        else {
+                               ns += runtime·nanotime();
                                ts.tv_sec = ns/1000000000LL;
                                ts.tv_nsec = ns%1000000000LL;
                                runtime·thrsleep(&m->waitsemacount, CLOCK_REALTIME, &ts, &m->waitsemalock);