1 files changed, 64 insertions, 0 deletions
diff --git a/lib/tevent/tevent.h b/lib/tevent/tevent.h
index 2cbd175e73..56ae0ee082 100644
--- a/lib/tevent/tevent.h
+++ b/lib/tevent/tevent.h
@@ -358,6 +358,70 @@ int _tevent_loop_until(struct tevent_context *ev,
 	_tevent_loop_until(ev, finished, private_data, __location__)
 #endif
 
+
+/**
+ * The following structure and registration functions are exclusively
+ * needed for people writing and pluggin a different event engine.
+ * There is nothing useful for normal tevent user in here.
+ */
+
+struct tevent_ops {
+	/* context init */
+	int (*context_init)(struct tevent_context *ev);
+
+	/* fd_event functions */
+	struct tevent_fd *(*add_fd)(struct tevent_context *ev,
+				    TALLOC_CTX *mem_ctx,
+				    int fd, uint16_t flags,
+				    tevent_fd_handler_t handler,
+				    void *private_data,
+				    const char *handler_name,
+				    const char *location);
+	void (*set_fd_close_fn)(struct tevent_fd *fde,
+				tevent_fd_close_fn_t close_fn);
+	uint16_t (*get_fd_flags)(struct tevent_fd *fde);
+	void (*set_fd_flags)(struct tevent_fd *fde, uint16_t flags);
+
+	/* timed_event functions */
+	struct tevent_timer *(*add_timer)(struct tevent_context *ev,
+					  TALLOC_CTX *mem_ctx,
+					  struct timeval next_event,
+					  tevent_timer_handler_t handler,
+					  void *private_data,
+					  const char *handler_name,
+					  const char *location);
+
+	/* immediate event functions */
+	void (*schedule_immediate)(struct tevent_immediate *im,
+				   struct tevent_context *ev,
+				   tevent_immediate_handler_t handler,
+				   void *private_data,
+				   const char *handler_name,
+				   const char *location);
+
+	/* signal functions */
+	struct tevent_signal *(*add_signal)(struct tevent_context *ev,
+					    TALLOC_CTX *mem_ctx,
+					    int signum, int sa_flags,
+					    tevent_signal_handler_t handler,
+					    void *private_data,
+					    const char *handler_name,
+					    const char *location);
+
+	/* loop functions */
+	int (*loop_once)(struct tevent_context *ev, const char *location);
+	int (*loop_wait)(struct tevent_context *ev, const char *location);
+};
+
+bool tevent_register_backend(const char *name, const struct tevent_ops *ops);
+
+
+/**
+ * The following definitions are usueful only for compatibility with the
+ * implementation originally developed within the samba4 code and will be
+ * soon removed. Please NEVER use in new code.
+ */
+
 #ifdef TEVENT_COMPAT_DEFINES
 
 #define event_context	tevent_context