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-rw-r--r--sim/ppc/events.c238
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diff --git a/sim/ppc/events.c b/sim/ppc/events.c
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--- a/sim/ppc/events.c
+++ /dev/null
@@ -1,238 +0,0 @@
-/* This file is part of the program psim.
-
- Copyright (C) 1994-1995, Andrew Cagney <cagney@highland.com.au>
-
- 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.
-
- 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-
- */
-
-
-#ifndef _EVENTS_C_
-#define _EVENTS_C_
-
-#ifndef STATIC_INLINE_EVENTS
-#define STATIC_INLINE_EVENTS STATIC_INLINE
-#endif
-
-
-#include "basics.h"
-#include "events.h"
-
-
-/* The event queue maintains a single absolute time using two
- variables.
-
- TIME_OF_EVENT: this holds the time at which the next event is ment
- to occure. If no next event it will hold the time of the last
- event. The first event occures at time 0 - system start.
-
- TIME_FROM_EVENT: The current distance from TIME_OF_EVENT. If an
- event is pending, this will be positive. If no future event is
- pending this will be negative. This variable is decremented once
- for each iteration of a clock cycle.
-
- Clearly there is a bug in that this code assumes that the absolute
- time counter will never become greater than 2^62. */
-
-typedef struct _event_entry event_entry;
-struct _event_entry {
- void *data;
- event_handler *handler;
- signed64 time_of_event;
- event_entry *next;
-};
-
-struct _event_queue {
- event_entry *queue;
- event_entry *volatile held;
- event_entry *volatile *volatile held_end;
- signed64 time_of_event;
- signed64 time_from_event;
-};
-
-
-INLINE_EVENTS event_queue *
-event_queue_create(void)
-{
- event_queue *new_event_queue = ZALLOC(event_queue);
-
- new_event_queue->queue = NULL;
- new_event_queue->held = NULL;
- new_event_queue->held_end = &new_event_queue->held;
- /* both times are already zero */
- return new_event_queue;
-}
-
-
-
-STATIC_INLINE_EVENTS void
-insert_event_entry(event_queue *events,
- event_entry *new_event,
- signed64 delta)
-{
- event_entry *curr;
- event_entry **last;
- signed64 time_of_event;
-
- if (delta <= 0)
- error("can not schedule event for current time\n");
-
- /* compute when the event should occure */
- time_of_event = (events->time_of_event
- - events->time_from_event
- + delta);
-
- /* find the queue insertion point - things are time ordered */
- last = &events->queue;
- curr = events->queue;
- while (curr != NULL && time_of_event >= curr->time_of_event) {
- last = &curr->next;
- curr = curr->next;
- }
-
- /* insert it */
- new_event->next = curr;
- *last = new_event;
- new_event->time_of_event = time_of_event;
-
- /* adjust the time until the first event */
- events->time_from_event = (events->queue->time_of_event
- - (events->time_of_event
- - events->time_from_event));
- events->time_of_event = events->queue->time_of_event;
-}
-
-INLINE_EVENTS event_entry_tag
-event_queue_schedule(event_queue *events,
- signed64 delta_time,
- event_handler *handler,
- void *data)
-{
- event_entry *new_event = ZALLOC(event_entry);
- new_event->data = data;
- new_event->handler = handler;
- insert_event_entry(events, new_event, delta_time);
- return new_event;
-}
-
-
-INLINE_EVENTS event_entry_tag
-event_queue_schedule_after_signal(event_queue *events,
- signed64 delta_time,
- event_handler *handler,
- void *data)
-{
- event_entry *new_event = ZALLOC(event_entry);
-
- new_event->data = data;
- new_event->handler = handler;
- new_event->time_of_event = delta_time; /* work it out later */
- new_event->next = NULL;
-
- /*-LOCK-*/
- if (events->held == NULL) {
- events->held = new_event;
- }
- else {
- *events->held_end = new_event;
- }
- events->held_end = &new_event->next;
- /*-UNLOCK-*/
-
- return new_event;
-}
-
-
-INLINE_EVENTS void
-event_queue_deschedule(event_queue *events,
- event_entry_tag event_to_remove)
-{
- if (event_to_remove != NULL) {
- event_entry *current;
- event_entry **ptr_to_current;
- for (ptr_to_current = &events->queue, current = *ptr_to_current;
- current != NULL && current != event_to_remove;
- ptr_to_current = &current->next, current = *ptr_to_current);
- if (current == event_to_remove) {
- *ptr_to_current = current->next;
- zfree(current);
- /* Just forget to recompute the delay to the next event */
- }
- }
-}
-
-
-
-
-INLINE_EVENTS int
-event_queue_tick(event_queue *events)
-{
- /* remove things from the asynchronous event queue onto the real one */
- if (events->held != NULL) {
- event_entry *held_events;
- event_entry *curr_event;
-
- /*-LOCK-*/
- held_events = events->held;
- events->held = NULL;
- events->held_end = &events->held;
- /*-UNLOCK-*/
-
- do {
- curr_event = held_events;
- held_events = curr_event->next;
- insert_event_entry(events, curr_event, curr_event->time_of_event);
- } while (held_events != NULL);
- }
-
- /* advance time, checking to see if we've reached time zero which
- would indicate the time for the next event has arrived */
- events->time_from_event -= 1;
- return events->time_from_event == 0;
-}
-
-INLINE_EVENTS void
-event_queue_process(event_queue *events)
-{
- if (events->time_from_event == 0) {
- /* consume all events for this or earlier times */
- do {
- event_entry *to_do = events->queue;
- events->queue = to_do->next;
- to_do->handler(events,
- to_do->data);
- zfree(to_do);
- } while (events->queue != NULL
- && events->queue->time_of_event <= events->time_of_event);
- /* re-caculate time for new events */
- if (events->queue != NULL) {
- events->time_from_event = (events->queue->time_of_event
- - events->time_of_event);
- events->time_of_event = events->queue->time_of_event;
- }
- else {
- /* nothing to do, time_from_event will go negative */
- }
- }
-}
-
-INLINE_EVENTS signed64
-event_queue_time(event_queue *queue)
-{
- return queue->time_of_event - queue->time_from_event;
-}
-
-
-#endif /* _EVENTS_C_ */