Revision: 47 http://trac.macosforge.org/projects/libdispatch/changeset/47 Author: robert@fledge.watson.org Date: 2009-10-03 06:14:28 -0700 (Sat, 03 Oct 2009) Log Message: ----------- Check for declarations of CLOCK_UPTIME and CLOCK_MONOTONIC, and when using clock_gettime() instead of mach_absolute_time() prefer uptime if available. This is required on Linux, which does not implement CLOCK_UPTIME. Modified Paths: -------------- trunk/configure.ac trunk/src/os_shims.h Modified: trunk/configure.ac =================================================================== --- trunk/configure.ac 2009-09-26 19:29:18 UTC (rev 46) +++ trunk/configure.ac 2009-10-03 13:14:28 UTC (rev 47) @@ -172,6 +172,8 @@ # # Find functions and declarations we care about. # +AC_CHECK_DECLS([CLOCK_UPTIME, CLOCK_MONOTONIC], [], [], + [[#include <sys/time.h>]]) AC_CHECK_DECLS([EVFILT_SESSION, NOTE_NONE, NOTE_REAP, NOTE_SIGNAL], [], [], [[#include <sys/event.h>]]) AC_CHECK_DECLS([VQ_UPDATE, VQ_VERYLOWDISK], [], [], [[#include <sys/mount.h>]]) Modified: trunk/src/os_shims.h =================================================================== --- trunk/src/os_shims.h 2009-09-26 19:29:18 UTC (rev 46) +++ trunk/src/os_shims.h 2009-10-03 13:14:28 UTC (rev 47) @@ -200,7 +200,13 @@ struct timespec ts; int ret; +#if HAVE_DECL_CLOCK_UPTIME ret = clock_gettime(CLOCK_UPTIME, &ts); +#elif HAVE_DECL_CLOCK_MONOTONIC + ret = clock_gettime(CLOCK_MONOTONIC, &ts); +#else +#error "clock_gettime: no supported absolute time clock" +#endif dispatch_assume_zero(ret); /* XXXRW: Some kind of overflow detection needed? */