--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/eventq.h	Mon Jan 29 11:24:44 2007 +0000
@@ -0,0 +1,71 @@
+/**
+ * $Id: eventq.h,v 1.1 2007-01-06 04:06:36 nkeynes Exp $
+ *
+ * Simple implementation of one-shot timers. Effectively this allows IO
+ * devices to wait until a particular time before completing. We expect 
+ * there to be at least half a dozen or so continually scheduled events
+ * (TMU and PVR2), peaking around 20+.
+ *
+ * Copyright (c) 2005 Nathan Keynes.
+ *
+ * This program 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 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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.
+ */
+
+#include "dream.h"
+
+#define NOT_SCHEDULED 0xFFFFFFFF /* Sentinel value */
+
+
+typedef void (*event_func_t)(int eventid);
+
+/**
+ * Register the callback to be associated with the given event ID.
+ * Note: These should be registered at init time and never changed.
+ */
+void register_event_callback( int eventid, event_func_t func );
+
+/**
+ * Schedule a new pending event.
+ * @param eventid Unique ID identifying the event in question (used to remove it
+ * at a later time). If the eventid is scheduled more than once, only the lastest
+ * schedule for that ID will be valid.
+ * @param nanosecs Nanoseconds from the current SH4 time at which the event
+ * should occur.
+ */
+void event_schedule( int eventid, uint32_t nanosecs );
+
+/**
+ * Schedule a long-duration pending event
+ */
+void event_schedule_long( int eventid, uint32_t seconds, uint32_t nanosecs );
+
+/**
+ * Remove a previously created event without triggering it. This is usually
+ * only used when an operation is aborted.
+ */
+void event_cancel( int eventid );
+
+/**
+ * Return the slice cycle time of the next event, or NOT_SCHEDULED
+ * if no events are scheduled for this time slice.
+ */
+uint32_t event_get_next_time();
+
+/**
+ * Execute the event on the top of the queue, and remove it.
+ */
+void event_execute();
+
+#define MAX_EVENT_ID 128
+
+/* Events 1..96 are defined as the corresponding ASIC events. */
+
+