annotate liboctave/util/oct-mutex.h @ 33634:4a70f390c85e default tip @

maint: Merge stable to default.
author Markus Mützel <markus.muetzel@gmx.de>
date Tue, 28 May 2024 15:25:54 +0200
parents 4b601ca024d5
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1 ////////////////////////////////////////////////////////////////////////
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2 //
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3 // Copyright (C) 2008-2024 The Octave Project Developers
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4 //
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5 // See the file COPYRIGHT.md in the top-level directory of this
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6 // distribution or <https://octave.org/copyright/>.
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7 //
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8 // This file is part of Octave.
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9 //
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10 // Octave is free software: you can redistribute it and/or modify it
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11 // under the terms of the GNU General Public License as published by
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12 // the Free Software Foundation, either version 3 of the License, or
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13 // (at your option) any later version.
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14 //
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15 // Octave is distributed in the hope that it will be useful, but
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16 // WITHOUT ANY WARRANTY; without even the implied warranty of
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17 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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18 // GNU General Public License for more details.
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19 //
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20 // You should have received a copy of the GNU General Public License
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21 // along with Octave; see the file COPYING. If not, see
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22 // <https://www.gnu.org/licenses/>.
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23 //
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24 ////////////////////////////////////////////////////////////////////////
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25
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26 #if ! defined (octave_oct_mutex_h)
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27 #define octave_oct_mutex_h 1
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28
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29 #include "octave-config.h"
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30
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31 #include <memory>
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32
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33 OCTAVE_BEGIN_NAMESPACE(octave)
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34
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35 class mutex;
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36
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37 class OCTAVE_API base_mutex
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38 {
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39 public:
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40 friend class mutex;
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41
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42 OCTAVE_DEFAULT_CONSTRUCT_COPY_MOVE (base_mutex)
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43
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44 virtual ~base_mutex () = default;
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45
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46 virtual void lock ();
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47
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48 virtual void unlock ();
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49
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50 virtual bool try_lock ();
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51 };
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52
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53 class OCTAVE_API mutex
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54 {
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55 public:
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56 mutex ();
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57
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58 OCTAVE_DEFAULT_COPY_MOVE_DELETE (mutex)
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59
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60 void lock ()
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61 {
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62 m_rep->lock ();
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63 }
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64
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65 void unlock ()
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66 {
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67 m_rep->unlock ();
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68 }
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69
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70 bool try_lock ()
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71 {
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72 return m_rep->try_lock ();
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73 }
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74
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75 protected:
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76 std::shared_ptr<base_mutex> m_rep;
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77 };
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78
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79 class OCTAVE_API autolock
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80 {
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81 public:
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82 autolock (const mutex& m, bool block = true)
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83 : m_mutex (m), m_lock_result (false)
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84 {
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85 if (block)
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86 {
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87 m_mutex.lock ();
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88 m_lock_result = true;
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89 }
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90 else
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91 m_lock_result = m_mutex.try_lock ();
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92 }
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93
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94 OCTAVE_DISABLE_CONSTRUCT_COPY_MOVE (autolock)
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95
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96 ~autolock ()
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97 {
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98 if (m_lock_result)
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99 m_mutex.unlock ();
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100 }
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101
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102 bool ok () const { return m_lock_result; }
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103
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104 operator bool () const { return ok (); }
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105
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106 private:
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107
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108 mutex m_mutex;
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109
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110 bool m_lock_result;
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111 };
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112
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113
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114 class OCTAVE_API thread
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115 {
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116 public:
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117
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118 static void init ();
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119
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120 static bool is_thread ();
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121 };
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122
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123 OCTAVE_END_NAMESPACE(octave)
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124
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125 #endif