Fix ethread events with timeout

Lots of pthread platforms unnecessarily falled back on the pipe/select
solution. This since we tried to use the same monotonic clock source
for pthread_cond_timedwait() as used by OS monotonic time. This has
been fixed on most platforms by using another clock source.

Darwin can however not use pthread_cond_timedwait() with monotonic
clock source and has to use the pipe/select solution. On darwin we
now use select with _DARWIN_UNLIMITED_SELECT in order to be able to
handle a large amount of file descriptors.

1 files changed, 10 insertions, 0 deletions

diff --git a/erts/emulator/beam/erl_threads.h b/erts/emulator/beam/erl_threads.h
index 5347979372..34f91e2ec8 100644
--- a/erts/emulator/beam/erl_threads.h
+++ b/erts/emulator/beam/erl_threads.h
@@ -649,6 +649,7 @@ ERTS_GLB_INLINE void erts_tsd_set(erts_tsd_key_t key, void *value);
 ERTS_GLB_INLINE void * erts_tsd_get(erts_tsd_key_t key);
 ERTS_GLB_INLINE erts_tse_t *erts_tse_fetch(void);
 ERTS_GLB_INLINE void erts_tse_return(erts_tse_t *ep);
+ERTS_GLB_INLINE void erts_tse_prepare_timed(erts_tse_t *ep);
 ERTS_GLB_INLINE void erts_tse_set(erts_tse_t *ep);
 ERTS_GLB_INLINE void erts_tse_reset(erts_tse_t *ep);
 ERTS_GLB_INLINE int erts_tse_wait(erts_tse_t *ep);
@@ -3461,6 +3462,15 @@ ERTS_GLB_INLINE void erts_tse_return(erts_tse_t *ep)
 #endif
 }
 
+ERTS_GLB_INLINE void erts_tse_prepare_timed(erts_tse_t *ep)
+{
+#ifdef USE_THREADS
+    int res = ethr_event_prepare_timed(&((ethr_ts_event *) ep)->event);
+    if (res != 0)
+	erts_thr_fatal_error(res, "prepare timed");
+#endif
+}
+
 ERTS_GLB_INLINE void erts_tse_set(erts_tse_t *ep)
 {
 #ifdef USE_THREADS