Imported Upstream version 1.0.28

[platform/upstream/alsa-utils.git] / alsaloop / pcmjob.c

diff --git a/alsaloop/pcmjob.c b/alsaloop/pcmjob.c
index 139b6fd..f32180c 100644 (file)
--- a/alsaloop/pcmjob.c
+++ b/alsaloop/pcmjob.c
@@ -62,11 +62,22 @@ static const char *src_types[] = {
 };
 #endif
 
-static pthread_mutex_t pcm_open_mutex =
-                                PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP;
+static pthread_once_t pcm_open_mutex_once = PTHREAD_ONCE_INIT;
+static pthread_mutex_t pcm_open_mutex;
+
+static void pcm_open_init_mutex(void)
+{
+       pthread_mutexattr_t attr;
+
+       pthread_mutexattr_init(&attr);
+       pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE);
+       pthread_mutex_init(&pcm_open_mutex, &attr);
+       pthread_mutexattr_destroy(&attr);
+}
 
 static inline void pcm_open_lock(void)
 {
+       pthread_once(&pcm_open_mutex_once, pcm_open_init_mutex);
        if (workarounds & WORKAROUND_SERIALOPEN)
                pthread_mutex_lock(&pcm_open_mutex);
 }