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cache: fix build on OSX (again)

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OSX doesn't support the POSIX API we were using.

We check for _POSIX_TIMERS. 0 or -1 means unsupported. See:
http://pubs.opengroup.org/onlinepubs/009696699/functions/clock_getres.html
http://pubs.opengroup.org/onlinepubs/009696699/basedefs/unistd.h.html

The workaround of using gettimeofday() is suggested by Apple:
https://developer.apple.com/library/mac/documentation/Darwin/Reference/ManPages/man3/pthread_cond_timedwait.3.html

Thanks to AStorm for providing help here.
This commit is contained in:
wm4 2013-06-16 22:56:24 +02:00
parent fa30dc4154
commit c412f7daf6
1 changed files with 7 additions and 0 deletions
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7
stream/cache.c
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@ -131,7 +131,14 @@ static int cond_timed_wait(pthread_cond_t *cond, pthread_mutex_t *mutex,
double timeout)
{
struct timespec ts;
#if _POSIX_TIMERS > 0
clock_gettime(CLOCK_REALTIME, &ts);
#else
struct timeval tv;
gettimeofday(&tv, NULL);
ts.tv_sec = tv.tv_sec;
ts.tv_nsec = tv.tv_usec * 1000UL;
#endif
unsigned long seconds = (int)timeout;
unsigned long nsecs = (timeout - seconds) * 1000000000UL;
if (nsecs + ts.tv_nsec >= 1000000000UL) {