Fix mutex ownership in pthread SDL_CondWait()

src/thread/pthread/SDL_syscond.c

@@ -138,6 +138,10 @@ SDL_CondWaitTimeout(SDL_cond * cond, SDL_mutex * mutex, Uint32 ms)
     default:
         retval = SDL_SetError("pthread_cond_timedwait() failed");
     }
+#if FAKE_RECURSIVE_MUTEX
+    mutex->owner = pthread_self();
+    mutex->recursive = 0;
+#endif
     return retval;
 }
 
@@ -152,6 +156,10 @@ SDL_CondWait(SDL_cond * cond, SDL_mutex * mutex)
     } else if (pthread_cond_wait(&cond->cond, &mutex->id) != 0) {
         return SDL_SetError("pthread_cond_wait() failed");
     }
+#if FAKE_RECURSIVE_MUTEX 
+    mutex->owner = pthread_self();
+    mutex->recursive = 0;
+#endif
     return 0;
 }
 

src/thread/pthread/SDL_sysmutex_c.h

@@ -23,9 +23,18 @@
 #ifndef SDL_mutex_c_h_
 #define SDL_mutex_c_h_
 
+#if !SDL_THREAD_PTHREAD_RECURSIVE_MUTEX && \
+    !SDL_THREAD_PTHREAD_RECURSIVE_MUTEX_NP
+#define FAKE_RECURSIVE_MUTEX 1
+#endif
+
 struct SDL_mutex
 {
     pthread_mutex_t id;
+#if FAKE_RECURSIVE_MUTEX
+    int recursive;
+    pthread_t owner;
+#endif
 };
 
 #endif /* SDL_mutex_c_h_ */