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[hurd,commited 1/2] htl: support cancellation during pthread_once
- From: Samuel Thibault <samuel dot thibault at ens-lyon dot org>
- To: libc-alpha at sourceware dot org
- Cc: Samuel Thibault <samuel dot thibault at ens-lyon dot org>, commit-hurd at gnu dot org
- Date: Sun, 9 Feb 2020 20:51:31 +0100
- Subject: [hurd,commited 1/2] htl: support cancellation during pthread_once
---
sysdeps/htl/pt-once.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/sysdeps/htl/pt-once.c b/sysdeps/htl/pt-once.c
index 0581f7bd6c..7f86e28006 100644
--- a/sysdeps/htl/pt-once.c
+++ b/sysdeps/htl/pt-once.c
@@ -21,6 +21,13 @@
#include <pt-internal.h>
+static void
+clear_once_control (void *arg)
+{
+ pthread_once_t *once_control = arg;
+ __pthread_spin_unlock (&once_control->__lock);
+}
+
int
__pthread_once (pthread_once_t *once_control, void (*init_routine) (void))
{
@@ -33,7 +40,10 @@ __pthread_once (pthread_once_t *once_control, void (*init_routine) (void))
if (once_control->__run == 0)
{
+ pthread_cleanup_push (clear_once_control, once_control);
init_routine ();
+ pthread_cleanup_pop (0);
+
atomic_full_barrier ();
once_control->__run = 1;
}
--
2.24.1