1 files changed, 12 insertions, 0 deletions
diff --git a/source/blender/blenlib/BLI_threads.h b/source/blender/blenlib/BLI_threads.h
index 331cac3ed76..154986936a2 100644
--- a/source/blender/blenlib/BLI_threads.h
+++ b/source/blender/blenlib/BLI_threads.h
@@ -131,6 +131,18 @@ void BLI_rw_mutex_free(ThreadRWMutex *mutex);
 void BLI_rw_mutex_lock(ThreadRWMutex *mutex, int mode);
 void BLI_rw_mutex_unlock(ThreadRWMutex *mutex);
 
+/* Ticket Mutex Lock
+ *
+ * This is a 'fair' mutex in that it will grant the lock to the first thread
+ * that requests it. */
+
+typedef struct TicketMutex TicketMutex;
+
+TicketMutex *BLI_ticket_mutex_alloc(void);
+void BLI_ticket_mutex_free(TicketMutex *ticket);
+void BLI_ticket_mutex_lock(TicketMutex *ticket);
+void BLI_ticket_mutex_unlock(TicketMutex *ticket);
+
 /* ThreadedWorker
  *
  * A simple tool for dispatching work to a limited number of threads