gem5 v24.1.0.1
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random.cc
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1/*
2 * Copyright (c) 2014 ARM Limited
3 * All rights reserved
4 *
5 * The license below extends only to copyright in the software and shall
6 * not be construed as granting a license to any other intellectual
7 * property including but not limited to intellectual property relating
8 * to a hardware implementation of the functionality of the software
9 * licensed hereunder. You may use the software subject to the license
10 * terms below provided that you ensure that this notice is replicated
11 * unmodified and in its entirety in all distributions of the software,
12 * modified or unmodified, in source code or in binary form.
13 *
14 * Copyright (c) 2003-2005 The Regents of The University of Michigan
15 * All rights reserved.
16 *
17 * Redistribution and use in source and binary forms, with or without
18 * modification, are permitted provided that the following conditions are
19 * met: redistributions of source code must retain the above copyright
20 * notice, this list of conditions and the following disclaimer;
21 * redistributions in binary form must reproduce the above copyright
22 * notice, this list of conditions and the following disclaimer in the
23 * documentation and/or other materials provided with the distribution;
24 * neither the name of the copyright holders nor the names of its
25 * contributors may be used to endorse or promote products derived from
26 * this software without specific prior written permission.
27 *
28 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
29 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
30 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
31 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
32 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
33 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
34 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
35 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
36 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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38 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
39 */
40
41#include "base/random.hh"
42
43#include <sstream>
44
45namespace gem5
46{
47
49{
50 init(s);
51}
52
54{
55 assert(instances);
56
57 int removed = 0;
58
59 instances->erase(std::remove_if(instances->begin(), instances->end(),
60 [&](const auto& s_ptr)
61 {
62 removed += s_ptr.expired();
63 return s_ptr.expired();
64 }));
65
66 // Can only remove one pointer
67 // since we are destroying one
68 // object
69 assert(removed == 1);
70
71 if (instances->empty()) {
72 delete instances;
73 instances = nullptr;
74 }
75}
76
77void
78Random::init(uint32_t s)
79{
80 gen.seed(s);
81}
82
83uint64_t Random::globalSeed = 5489;
85
86} // namespace gem5
void init(uint32_t s)
Definition random.cc:78
static uint64_t globalSeed
Definition random.hh:88
static Instances * instances
Collection of all live instances of Random to enable global reseeding.
Definition random.hh:110
STL vector class.
Definition stl.hh:37
Random()=delete
std::mt19937_64 gen
Definition random.hh:93
Bitfield< 4 > s
const FlagsType init
This Stat is Initialized.
Definition info.hh:55
Copyright (c) 2024 Arm Limited All rights reserved.
Definition binary32.hh:36

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