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authorAndy Wingo <wingo@pobox.com>2016-11-13 22:16:42 +0100
committerAndy Wingo <wingo@pobox.com>2016-11-13 22:17:40 +0100
commit3f23688f397722546861d04688c3eefb0c9c9149 (patch)
treef618fc3eaa9d0083f285a5265a1127ffaf70cbdd
parent9ac2c9942b75d3e891ae8eabc219b68bfdf61f9c (diff)
downloadguile-3f23688f397722546861d04688c3eefb0c9c9149.tar.gz
Fix crasher in scm_system_async_mark_for_thread
* libguile/async.c (scm_system_async_mark_for_thread): Only signal the cond if there is a wait mutex.
-rw-r--r--libguile/async.c9
1 files changed, 6 insertions, 3 deletions
diff --git a/libguile/async.c b/libguile/async.c
index 174a87afb..92ed2f4d6 100644
--- a/libguile/async.c
+++ b/libguile/async.c
@@ -148,9 +148,12 @@ SCM_DEFINE (scm_system_async_mark_for_thread, "system-async-mark", 1, 1, 0,
sleep_mutex locked while setting t->sleep_mutex and will only
unlock it again while waiting on sleep_cond.
*/
- scm_i_scm_pthread_mutex_lock (wake->mutex);
- scm_i_pthread_cond_signal (&t->sleep_cond);
- scm_i_pthread_mutex_unlock (wake->mutex);
+ if (wake->mutex)
+ {
+ scm_i_scm_pthread_mutex_lock (wake->mutex);
+ scm_i_pthread_cond_signal (&t->sleep_cond);
+ scm_i_pthread_mutex_unlock (wake->mutex);
+ }
if (wake->fd >= 0)
{