Author: [email protected]
Date: Wed Mar 18 03:48:06 2009
New Revision: 1530
Modified:
branches/bleeding_edge/src/platform-linux.cc
Log:
Circumvent a bug in older glibc.
In glibc prior to 2.3.4 the return value from sem_timedwait is not -1
when it fails, but the actual error code.
Turned out that our ARM setup uses glibc 2.3.2.
Modified: branches/bleeding_edge/src/platform-linux.cc
==============================================================================
--- branches/bleeding_edge/src/platform-linux.cc (original)
+++ branches/bleeding_edge/src/platform-linux.cc Wed Mar 18 03:48:06 2009
@@ -634,6 +634,11 @@
while (true) {
int result = sem_timedwait(&sem_, &ts);
if (result == 0) return true; // Successfully got semaphore.
+ if (result > 0) {
+ // For glibc prior to 2.3.4 sem_timedwait returns the error instead
of -1.
+ errno = result;
+ result = -1;
+ }
if (result == -1 && errno == ETIMEDOUT) return false; // Timeout.
CHECK(result == -1 && errno == EINTR); // Signal caused spurious
wakeup.
}
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