Fix some almtx_ return values

1 files changed, 22 insertions, 10 deletions

diff --git a/OpenAL32/Include/threads.h b/OpenAL32/Include/threads.h
index 847ade7f..f0ee1b5c 100644
--- a/OpenAL32/Include/threads.h
+++ b/OpenAL32/Include/threads.h
@@ -6,10 +6,10 @@
 
 enum {
     althrd_success = 0,
-    althrd_timeout,
-    althrd_error,
+    althrd_nomem,
+    althrd_timedout,
     althrd_busy,
-    althrd_nomem
+    althrd_error
 };
 
 enum {
@@ -134,9 +134,15 @@ inline int althrd_sleep(const struct timespec *ts, struct timespec *rem)
 
 inline int almtx_lock(almtx_t *mtx)
 {
-    if(!mtx) return althrd_error;
-    pthread_mutex_lock(mtx);
-    return althrd_success;
+    int ret = EINVAL;
+    if(mtx != NULL)
+        ret = pthread_mutex_lock(mtx);
+    switch(ret)
+    {
+        case 0: return althrd_success;
+        case EAGAIN: return althrd_busy;
+    }
+    return althrd_error;
 }
 
 inline int almtx_unlock(almtx_t *mtx)
@@ -148,10 +154,16 @@ inline int almtx_unlock(almtx_t *mtx)
 
 inline int almtx_trylock(almtx_t *mtx)
 {
-    if(!mtx) return althrd_error;
-    if(pthread_mutex_trylock(mtx) != 0)
-        return althrd_busy;
-    return althrd_success;
+    int ret = EINVAL;
+    if(mtx != NULL)
+        ret = pthread_mutex_trylock(mtx);
+    switch(ret)
+    {
+        case 0: return althrd_success;
+        case EAGAIN:
+        case EBUSY: return althrd_busy;
+    }
+    return althrd_error;
 }
 
 #endif