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| author | Colin Walters <walters@verbum.org> | 2009-07-10 22:27:55 -0400 |
|---|---|---|
| committer | Colin Walters <walters@verbum.org> | 2009-07-10 22:57:08 -0400 |
| commit | ae24bb35e2ee3ecde990f55852982b573754ec43 (patch) | |
| tree | bc812e591077f8abdbd23b329c4719bed6ab3a8c /configure.in | |
| parent | f4e15893e5be6da6c7642bb7ef9b14d5531afe41 (diff) | |
Bug 18121 - Use a monotonic clock for pthread timeouts
Patch based on one from Keith Mok <ek9852@gmail.com>, some
followup work from Janne Karhunen <Janne.Karhunen@gmail.com>.
We don't want condition variable timeouts to be affected by the system clock.
Use the POSIX CLOCK_MONOTONIC if available.
Diffstat (limited to 'configure.in')
| -rw-r--r-- | configure.in | 25 |
1 files changed, 24 insertions, 1 deletions
diff --git a/configure.in b/configure.in index 3af9cf7c..bd21a8c3 100644 --- a/configure.in +++ b/configure.in @@ -696,8 +696,31 @@ if $dbus_use_libxml; then fi # Thread lib detection -AC_CHECK_FUNC(pthread_cond_timedwait,,[AC_CHECK_LIB(pthread,pthread_cond_timedwait, +AC_CHECK_FUNC(pthread_cond_timedwait,[AC_CHECK_LIB(pthread,pthread_cond_timedwait, [THREAD_LIBS="-lpthread"])]) +save_libs="$LIBS" +LIBS="$LIBS $THREAD_LIBS" +AC_CHECK_FUNC(pthread_condattr_setclock,have_pthread_condattr_setclock=true,have_pthread_condattr_setclock=false) +if test x$have_pthread_condattr_setclock = xtrue; then + AC_SEARCH_LIBS([clock_getres],[rt],[THREAD_LIBS="$THREAD_LIBS -lrt"]) + AC_MSG_CHECKING([for CLOCK_MONOTONIC]) + AC_TRY_COMPILE([#include <time.h> +#include <pthread.h> +], [ +struct timespec monotonic_timer; +pthread_condattr_t attr; +pthread_condattr_init (&attr); +pthread_condattr_setclock (&attr, CLOCK_MONOTONIC); +clock_getres (CLOCK_MONOTONIC,&monotonic_timer); +], have_clock_monotonic=true, have_clock_monotonic=false) +if test x$have_clock_monotonic = xtrue; then + AC_MSG_RESULT([found]) + AC_DEFINE(HAVE_MONOTONIC_CLOCK, 1, [Define if we have CLOCK_MONOTONIC]) +else + AC_MSG_RESULT([not found]) +fi +fi +LIBS="$save_libs" # SELinux detection if test x$enable_selinux = xno ; then |