sc_event_queue.cc revision 13258:91b819262b87 
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 "base/logging.hh"
31#include "systemc/ext/channel/sc_event_queue.hh"
32#include "systemc/ext/core/sc_main.hh"
33#include "systemc/ext/core/sc_time.hh"
34
35namespace sc_core
36{
37
38sc_event_queue::sc_event_queue(sc_module_name name) :
39        sc_interface(), sc_event_queue_if(), sc_module(name)
40{
41    SC_METHOD(_trigger);
42    dont_initialize();
43    sensitive << _defaultEvent;
44}
45
46sc_event_queue::~sc_event_queue() {}
47
48void
49sc_event_queue::notify(double d, sc_time_unit tu)
50{
51    notify(sc_time(d, tu));
52}
53
54void
55sc_event_queue::notify(const sc_time &t)
56{
57    _times.push(sc_time_stamp() + t);
58    _defaultEvent.notify(_times.top() - sc_time_stamp());
59}
60
61void
62sc_event_queue::cancel_all()
63{
64    _defaultEvent.cancel();
65    _times = std::priority_queue<
66        sc_time, std::vector<sc_time>, std::greater<sc_time> >();
67}
68
69const sc_event &
70sc_event_queue::default_event() const
71{
72    return _defaultEvent;
73}
74
75void
76sc_event_queue::_trigger()
77{
78    _times.pop();
79    if (!_times.empty())
80        _defaultEvent.notify(_times.top() - sc_time_stamp());
81}
82
83} // namespace sc_core
84