add

+/*
+ * event_msgqueue.h
+ *
+ * Libevent threaded message passing primitives header
+ *
+ * Andrew Danforth <acd@weirdness.net>, October 2006
+ *
+ * Copyright (c) Andrew Danforth, 2006
+ *
+ */
+
+#ifndef _EVENT_MSGQUEUE_H_
+#define _EVENT_MSGQUEUE_H_
+
+#include <event.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct event_msgqueue;
+
+struct event_msgqueue *msgqueue_new(struct event_base *, unsigned int, void (*)(void *, void *), void *);
+int msgqueue_push(struct event_msgqueue *, void *);
+unsigned int msgqueue_length(struct event_msgqueue *);
+void msgqueue_destroy(struct event_msgqueue*);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
+