mutex-posix: Log pthread_mutex_unlock() error

This call has been seen failing on FreeBSD, and it's difficult to debug
without seeing which error the function returned.

Fixes: https://gitlab.freedesktop.org/pulseaudio/pulseaudio/-/issues/988

1 files changed, 8 insertions, 1 deletions

diff --git a/src/pulsecore/mutex-posix.c b/src/pulsecore/mutex-posix.c
index a835be1b7..41309a0a3 100644
--- a/src/pulsecore/mutex-posix.c
+++ b/src/pulsecore/mutex-posix.c
@@ -25,6 +25,8 @@
 #include <errno.h>
 
 #include <pulse/xmalloc.h>
+
+#include <pulsecore/core-error.h>
 #include <pulsecore/macro.h>
 
 #include "mutex.h"
@@ -103,9 +105,14 @@ bool pa_mutex_try_lock(pa_mutex *m) {
 }
 
 void pa_mutex_unlock(pa_mutex *m) {
+    int err;
+
     pa_assert(m);
 
-    pa_assert_se(pthread_mutex_unlock(&m->mutex) == 0);
+    if ((err = pthread_mutex_unlock(&m->mutex) != 0)) {
+        pa_log("pthread_mutex_unlock() failed: %s", pa_cstrerror(err));
+        pa_assert_not_reached();
+    }
 }
 
 pa_cond *pa_cond_new(void) {