1/*
2 * Copyright (c) 2012 The Regents of The University of Michigan
3 * Copyright (c) 2012-2013 Mark D. Hill and David A. Wood
4 * Copyright (c) 2013 Advanced Micro Devices, Inc.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions are
9 * met: redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer;
11 * redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution;
14 * neither the name of the copyright holders nor the names of its
15 * contributors may be used to endorse or promote products derived from
16 * this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 *
30 * Authors: Steve Reinhardt
31 *          Nathan Binkert
32 *          Nilay Vaish
33 */
34
35#ifndef __SIM_EVENTQ_IMPL_HH__
36#define __SIM_EVENTQ_IMPL_HH__
37
38#include "base/trace.hh"
39#include "sim/eventq.hh"
40
41inline void
42EventQueue::schedule(Event *event, Tick when, bool global)
43{
44    assert(when >= getCurTick());
45    assert(!event->scheduled());
46    assert(event->initialized());
47
48    event->setWhen(when, this);
49
50    // The check below is to make sure of two things
51    // a. a thread schedules local events on other queues through the asyncq
52    // b. a thread schedules global events on the asyncq, whether or not
53    //    this event belongs to this eventq. This is required to maintain
54    //    a total order amongst the global events. See global_event.{cc,hh}
55    //    for more explanation.
56    if (inParallelMode && (this != curEventQueue() || global)) {
57        asyncInsert(event);
58    } else {
59        insert(event);
60    }
61    event->flags.set(Event::Scheduled);
62    event->acquire();
63
64    if (DTRACE(Event))
65        event->trace("scheduled");
66}
67
68inline void
69EventQueue::deschedule(Event *event)
70{
71    assert(event->scheduled());
72    assert(event->initialized());
73    assert(!inParallelMode || this == curEventQueue());
74
75    remove(event);
76
77    event->flags.clear(Event::Squashed);
78    event->flags.clear(Event::Scheduled);
79
80    if (DTRACE(Event))
81        event->trace("descheduled");
82
83    event->release();
84}
85
86inline void
87EventQueue::reschedule(Event *event, Tick when, bool always)
88{
89    assert(when >= getCurTick());
90    assert(always || event->scheduled());
91    assert(event->initialized());
92    assert(!inParallelMode || this == curEventQueue());
93
94    if (event->scheduled()) {
95        remove(event);
96    } else {
97        event->acquire();
98    }
99
100    event->setWhen(when, this);
101    insert(event);
102    event->flags.clear(Event::Squashed);
103    event->flags.set(Event::Scheduled);
104
105    if (DTRACE(Event))
106        event->trace("rescheduled");
107}
108
109#endif // __SIM_EVENTQ_IMPL_HH__
110