1 files changed, 27 insertions, 0 deletions
diff --git a/include/wqueue.h b/include/wqueue.h
new file mode 100644
index 00000000000..658f3d66f12
--- /dev/null
+++ b/include/wqueue.h
@@ -0,0 +1,27 @@
+
+#ifndef _wqueue_h
+#define _wqueue_h
+
+#include <my_global.h>
+#include <my_pthread.h>
+
+/* info about requests in a waiting queue */
+typedef struct st_pagecache_wqueue
+{
+  struct st_my_thread_var *last_thread;         /* circular list of waiting
+                                                   threads */
+} WQUEUE;
+
+#ifdef THREAD
+void wqueue_link_into_queue(WQUEUE *wqueue, struct st_my_thread_var *thread);
+void wqueue_unlink_from_queue(WQUEUE *wqueue, struct st_my_thread_var *thread);
+void wqueue_add_to_queue(WQUEUE *wqueue, struct st_my_thread_var *thread);
+void wqueue_add_and_wait(WQUEUE *wqueue,
+                         struct st_my_thread_var *thread,
+                         pthread_mutex_t *lock);
+void wqueue_release_queue(WQUEUE *wqueue);
+void wqueue_release_one_locktype_from_queue(WQUEUE *wqueue);
+
+#endif
+
+#endif