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authorThomas Schwinge <thomas@codesourcery.com>2012-08-30 23:48:39 +0200
committerThomas Schwinge <thomas@codesourcery.com>2012-08-30 23:48:39 +0200
commita8b134d8c667b0105d7194a78f3fe478a3857302 (patch)
tree94da06519d2a623ce4e7aee21fd7b32ffecfea59 /sysdeps/generic/pt-condattr-setclock.c
parent013f554871c671f88942c9429720d3bb9a76c5ea (diff)
parent0096579c8bea920f7c42b40ea22db621da6480a5 (diff)
Merge commit 'refs/top-bases/t/stand-alone' into t/stand-alonet/stand-alone
Conflicts: Makefile.am
Diffstat (limited to 'sysdeps/generic/pt-condattr-setclock.c')
-rw-r--r--sysdeps/generic/pt-condattr-setclock.c27
1 files changed, 23 insertions, 4 deletions
diff --git a/sysdeps/generic/pt-condattr-setclock.c b/sysdeps/generic/pt-condattr-setclock.c
index 984c17e..c5a78ef 100644
--- a/sysdeps/generic/pt-condattr-setclock.c
+++ b/sysdeps/generic/pt-condattr-setclock.c
@@ -23,11 +23,30 @@
int
pthread_condattr_setclock (pthread_condattr_t *attr, clockid_t clock)
{
- if (__pthread_default_condattr.clock == clock)
+ /* Only a few clocks are allowed. CLOCK_REALTIME is always allowed.
+ CLOCK_MONOTONIC only if the kernel has the necessary support. */
+ if (clock == CLOCK_MONOTONIC)
{
- attr->clock = clock;
- return 0;
+ /* Check whether the clock is available. */
+ static int avail;
+
+ if (avail == 0)
+ {
+ struct timespec ts;
+ int res;
+
+ res = clock_getres (CLOCK_MONOTONIC, &ts);
+ avail = res < 0 ? -1 : 1;
+ }
+
+ if (avail < 0)
+ /* Not available. */
+ return EINVAL;
}
+ else if (clock != CLOCK_REALTIME)
+ return EINVAL;
+
+ attr->clock = clock;
- return EINVAL;
+ return 0;
}