gem5 v24.0.0.0
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sc_mutex.cc
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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
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25 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
30#include "systemc/ext/core/sc_module.hh" // for sc_gen_unique_name
31
32namespace sc_core
33{
34
36 sc_object(sc_gen_unique_name("mutex"))
37{}
38
42
43int
45{
46 while (trylock() == -1)
48 return 0;
49}
50
51int
53{
54 if (holder.valid())
55 return -1;
57 return 0;
58}
59
60int
62{
63 if (holder != ::sc_gem5::scheduler.current())
64 return -1;
65
66 holder = nullptr;
68 return 0;
69}
70
71} // namespace sc_core
virtual int unlock()
Definition sc_mutex.cc:61
sc_process_handle holder
Definition sc_mutex.hh:56
virtual int lock()
Definition sc_mutex.cc:44
sc_gem5::InternalScEvent unlockEvent
Definition sc_mutex.hh:57
virtual int trylock()
Definition sc_mutex.cc:52
Process * current()
Definition scheduler.hh:185
void wait()
Definition sc_module.cc:653
Scheduler scheduler
Definition scheduler.cc:494
const std::string & name()
Definition trace.cc:48

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