1/*
2 * Copyright 2018 Google, Inc.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are
6 * met: redistributions of source code must retain the above copyright
7 * notice, this list of conditions and the following disclaimer;
8 * redistributions in binary form must reproduce the above copyright
9 * notice, this list of conditions and the following disclaimer in the
10 * documentation and/or other materials provided with the distribution;
11 * neither the name of the copyright holders nor the names of its
12 * contributors may be used to endorse or promote products derived from
13 * this software without specific prior written permission.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
18 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
19 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
20 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
21 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
25 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 *
27 * Authors: Gabe Black
28 */
29
30#include "systemc/ext/channel/sc_event_queue.hh"
31#include "systemc/ext/core/sc_main.hh"
32#include "systemc/ext/core/sc_time.hh"
33
34namespace sc_core
35{
36
37sc_event_queue::sc_event_queue(sc_module_name name) :
38        sc_interface(), sc_event_queue_if(), sc_module(name)
39{
40    SC_METHOD(_trigger);
41    dont_initialize();
42    sensitive << _defaultEvent;
43}
44
45sc_event_queue::~sc_event_queue() {}
46
47void
48sc_event_queue::notify(double d, sc_time_unit tu)
49{
50    notify(sc_time(d, tu));
51}
52
53void
54sc_event_queue::notify(const sc_time &t)
55{
56    _times.push(sc_time_stamp() + t);
57    _defaultEvent.notify(_times.top() - sc_time_stamp());
58}
59
60void
61sc_event_queue::cancel_all()
62{
63    _defaultEvent.cancel();
64    _times = std::priority_queue<
65        sc_time, std::vector<sc_time>, std::greater<sc_time> >();
66}
67
68const sc_event &
69sc_event_queue::default_event() const
70{
71    return _defaultEvent;
72}
73
74void
75sc_event_queue::_trigger()
76{
77    _times.pop();
78    if (!_times.empty())
79        _defaultEvent.notify(_times.top() - sc_time_stamp());
80}
81
82} // namespace sc_core
83