event plugin and dbus interface by Ed Martin (forgot to add new files)

git-svn-id: https://ssl.bulix.org/svn/lcd4linux/trunk@1054 3ae390bd-cb1e-0410-b409-cd5a39f66f1f

1 files changed, 66 insertions, 0 deletions

diff --git a/event.h b/event.h
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+/* $Id: event.h 840 2007-09-09 12:17:42Z michael $
+ * $URL: https://ssl.bulix.org/svn/lcd4linux/trunk/event.h $
+ *
+ * generic timer handling
+ *
+ * Copyright (C) 2009 Ed Martin <edman007@edman007.com>
+ * Copyright (C) 2009 The LCD4Linux Team <lcd4linux-devel@users.sourceforge.net>
+ *
+ * This file is part of LCD4Linux.
+ *
+ * LCD4Linux is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * LCD4Linux is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ */
+
+
+#ifndef _EVENT_H_
+#define _EVENT_H_
+
+//events are identified by their file descriptor only
+
+/*
+ * these functions allow plugins to add event hooks
+ * (and thus break out of the main loop when sleeping)
+ * these callbacks than then trigger named events to propagate
+ * the event to the screen
+ */
+
+typedef enum {
+    EVENT_READ = 1,
+    EVENT_WRITE = 2,
+    EVENT_HUP = 4,
+    EVENT_ERR = 8
+} event_flags_t;
+
+
+int event_add(void (*callback) (event_flags_t flags, void *data), void *data, const int fd, const int read,
+	      const int write, const int active);
+int event_del(const int fd);
+int event_modify(const int fd, const int read, const int write, const int active);
+int event_process(const struct timespec *timeout);
+void event_exit(void);
+
+/*
+ * These fuctions keep a list of the events to trigger on allowing multiple
+ * things to trigger an event and multiple things to receive the event
+ */
+
+//add an event to be triggered
+int named_event_add(char *event, void (*callback) (void *data), void *data);
+//remove an event from the list of events
+int named_event_del(char *event, void (*callback) (void *data), void *data);
+int named_event_trigger(char *event);	//call all calbacks for this event
+
+#endif