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annotate liboctave/oct-mutex.h @ 11501:331fcc41ca23

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data member initialization fixes
author John W. Eaton <jwe@octave.org>
date Thu, 13 Jan 2011 03:04:51 -0500
parents cbc402e64d83
children fd0a3ac60b0e
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1 /*
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2
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3 Copyright (C) 2008 Michael Goffioul
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4
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5 This file is part of Octave.
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6
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7 Octave is free software; you can redistribute it and/or modify it
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8 under the terms of the GNU General Public License as published by the
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9 Free Software Foundation; either version 3 of the License, or (at your
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10 option) any later version.
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11
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12 Octave is distributed in the hope that it will be useful, but WITHOUT
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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15 for more details.
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16
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17 You should have received a copy of the GNU General Public License
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18 along with Octave; see the file COPYING. If not, see
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19 <http://www.gnu.org/licenses/>.
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20
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21 */
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22
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23 #if !defined (octave_octave_mutex_h)
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24 #define octave_octave_mutex_h 1
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25
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26 class octave_mutex;
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27
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28 class
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29 octave_base_mutex
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30 {
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31 public:
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32 friend class octave_mutex;
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33
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34 octave_base_mutex (void) : count (1) { }
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35
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36 virtual ~octave_base_mutex (void) { }
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37
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38 virtual void lock (void);
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39
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40 virtual void unlock (void);
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41
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42 private:
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43 int count;
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44 };
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45
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46 class
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47 OCTAVE_API
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48 octave_mutex
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49 {
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50 public:
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51 octave_mutex (void);
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52
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53 octave_mutex (const octave_mutex& m)
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54 : rep (m.rep)
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55 {
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56 rep->count++;
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57 }
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58
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59 ~octave_mutex (void)
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60 {
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61 if (--rep->count == 0)
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62 delete rep;
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63 }
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64
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65 octave_mutex& operator = (const octave_mutex& m)
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66 {
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67 if (rep != m.rep)
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68 {
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69 if (--rep->count == 0)
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70 delete rep;
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71
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72 rep = m.rep;
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73 rep->count++;
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74 }
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75
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76 return *this;
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77 }
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78
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79 void lock (void)
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80 {
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81 rep->lock ();
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82 }
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83
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84 void unlock (void)
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85 {
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86 rep->unlock ();
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87 }
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88
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89 protected:
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90 octave_base_mutex *rep;
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91 };
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92
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93 class
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94 octave_autolock
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95 {
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96 public:
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97 octave_autolock (const octave_mutex& m)
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98 : mutex (m)
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99 {
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100 mutex.lock ();
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101 }
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102
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103 ~octave_autolock (void)
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104 {
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105 mutex.unlock ();
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106 }
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107
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108 private:
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109
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110 // No copying or default constructor!
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111 octave_autolock (void);
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112 octave_autolock (const octave_autolock&);
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113 octave_autolock& operator = (const octave_autolock&);
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114
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115 private:
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116 octave_mutex mutex;
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117 };
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118
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119 #endif