141 lines
3.0 KiB
C
141 lines
3.0 KiB
C
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/* Hardware event manager.
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Copyright (C) 1998 Free Software Foundation, Inc.
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Contributed by Cygnus Support.
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This file is part of GDB, the GNU debugger.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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#include "sim-main.h"
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#include "hw-base.h"
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#include "sim-events.h"
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/* The hw-events object is implemented using sim-events */
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struct hw_event {
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void *data;
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struct hw *me;
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hw_event_callback *callback;
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sim_event *real;
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struct hw_event_data *entry;
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};
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struct hw_event_data {
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struct hw_event event;
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struct hw_event_data *next;
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struct hw_event_data **prev;
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};
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void
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create_hw_event_data (struct hw *me)
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{
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/* NOP */
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}
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void
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delete_hw_event_data (struct hw *me)
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{
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if (me->events_of_hw != NULL)
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hw_abort (me, "stray events");
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}
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static void
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delete_hw_event (struct hw *me,
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struct hw_event **event)
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{
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struct hw_event_data *entry = (*event)->entry;
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*(entry->prev) = entry->next;
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entry->next->prev = entry->prev;
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(*event) = NULL;
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}
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static void
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create_hw_event (struct hw *me,
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struct hw_event **event)
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{
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struct hw_event_data *entry = HW_ZALLOC (me, struct hw_event_data);
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entry->next = me->events_of_hw;
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entry->prev = &me->events_of_hw;
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me->events_of_hw->prev = &entry->next;
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me->events_of_hw = entry;
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(*event) = &entry->event;
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}
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/* Pass the H/W event onto the real callback */
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static void
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bounce_hw_event (SIM_DESC sd,
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void *data)
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{
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/* save the data */
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struct hw_event *event = (struct hw_event*)data;
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struct hw *me = event->me;
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void *event_data = event->data;
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hw_event_callback *callback = event->callback;
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hw_free (me, data);
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event = NULL;
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callback (me, event_data);
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}
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/* Map onto the event functions */
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struct hw_event *
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hw_event_queue_schedule (struct hw *me,
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signed64 delta_time,
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hw_event_callback *callback,
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void *data)
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{
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struct hw_event *event;
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create_hw_event (me, &event);
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/* fill it in */
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event->data = data;
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event->callback = callback;
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event->me = me;
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event->real = sim_events_schedule (hw_system (me),
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delta_time,
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bounce_hw_event,
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event);
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return event;
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}
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void
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hw_event_queue_deschedule (struct hw *me,
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struct hw_event *event_to_remove)
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{
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/* remove it from the event queue */
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sim_events_deschedule (hw_system (me),
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event_to_remove->real);
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delete_hw_event (me, &event_to_remove);
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}
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signed64
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hw_event_queue_time (struct hw *me)
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{
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return sim_events_time (hw_system (me));
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}
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