1 files changed, 15 insertions, 0 deletions
diff --git a/src/include/box64context.h b/src/include/box64context.h
index 718d95b3..97c410ad 100644
--- a/src/include/box64context.h
+++ b/src/include/box64context.h
@@ -240,6 +240,21 @@ typedef struct box64context_s {
 
 } box64context_t;
 
+#ifndef USE_CUSTOM_MUTEX
+#define mutex_lock(A)    pthread_mutex_lock(A)
+#define mutex_trylock(A) pthread_mutex_trylock(A)
+#define mutex_unlock(A)  pthread_mutex_unlock(A)
+#else
+#define mutex_lock(A)                             \
+    do {                                          \
+        uint32_t tid = (uint32_t)GetTID();        \
+        while (native_lock_storeifnull_d(A, tid)) \
+            sched_yield();                        \
+    } while (0)
+#define mutex_trylock(A) native_lock_storeifnull_d(A, (uint32_t)GetTID())
+#define mutex_unlock(A)  native_lock_storeifref_d(A, 0, (uint32_t)GetTID())
+#endif
+
 extern box64context_t *my_context; // global context
 
 box64context_t *NewBox64Context(int argc);