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annotate libgui/src/thread-manager.cc @ 20830:b65888ec820e draft default tip gccjit

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dmalcom gcc jit import
author Stefan Mahr <dac922@gmx.de>
date Fri, 27 Feb 2015 16:59:36 +0100
parents 4197fc428c7d
children
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1 /*
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2
19898
4197fc428c7d maint: Update copyright notices for 2015.
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3 Copyright (C) 2013-2015 John W. Eaton
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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 #ifdef HAVE_CONFIG_H
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24 #include <config.h>
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25 #endif
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26
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27 #if defined (__WIN32__) && ! defined (__CYGWIN__)
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28 #include <windows.h>
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29 #else
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30 #include <pthread.h>
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31 #endif
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32
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33 #include <sys/types.h>
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34 #include <signal.h>
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35
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36 #include "sighandlers.h"
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37 #include "thread-manager.h"
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38
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39 #if defined (__WIN32__) && ! defined (__CYGWIN__)
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40
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41 class windows_thread_manager : public octave_base_thread_manager
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42 {
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43 public:
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44
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45 windows_thread_manager (void) : octave_base_thread_manager () { }
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46
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47 void register_current_thread (void) { }
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48
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49 void interrupt (void)
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50 {
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51 GenerateConsoleCtrlEvent (CTRL_C_EVENT, 0);
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52 }
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53 };
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54
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55 #else
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56
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57 class pthread_thread_manager : public octave_base_thread_manager
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58 {
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59 public:
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60
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61 pthread_thread_manager (void)
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62 : octave_base_thread_manager (), my_thread (), initialized (false)
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63 { }
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64
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65 void register_current_thread (void)
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66 {
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67 my_thread = pthread_self ();
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68 initialized = true;
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69 }
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70
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71 void interrupt (void)
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72 {
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73 if (initialized)
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74 pthread_kill (my_thread, SIGINT);
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75 }
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76
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77 private:
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78
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79 pthread_t my_thread;
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80
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81 bool initialized;
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82 };
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83
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84 #endif
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85
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86 octave_thread_manager::octave_thread_manager (void)
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87 : rep (octave_thread_manager::create_rep ())
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88 { }
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89
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90 // The following is a workaround for an apparent bug in GCC 4.1.2 and
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91 // possibly earlier versions. See Octave bug report #30685 for details.
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92 #if defined (__GNUC__)
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93 # if ! (__GNUC__ > 4 \
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94 || (__GNUC__ == 4 && (__GNUC_MINOR__ > 1 \
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95 || (__GNUC_MINOR__ == 1 && __GNUC_PATCHLEVEL__ > 2))))
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96 # undef GNULIB_NAMESPACE
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97 # define GNULIB_NAMESPACE
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98 # warning "disabling GNULIB_NAMESPACE for signal functions -- consider upgrading to a current version of GCC"
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99 # endif
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100 #endif
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101
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102 static void
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103 block_or_unblock_signal (int how, int sig)
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104 {
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105 #if ! defined (__WIN32__) || defined (__CYGWIN__)
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106 // Blocking/unblocking signals at thread level is only supported
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107 // on platform with fully compliant POSIX threads. This is not
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108 // supported on Win32. Moreover, we have to make sure that SIGINT
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109 // handler is not installed before calling AllocConsole: installing
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110 // a SIGINT handler internally calls SetConsoleCtrlHandler, which
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111 // must be called after AllocConsole to be effective.
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112
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113 sigset_t signal_mask;
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114
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115 GNULIB_NAMESPACE::sigemptyset (&signal_mask);
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116
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117 GNULIB_NAMESPACE::sigaddset (&signal_mask, sig);
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118
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119 pthread_sigmask (how, &signal_mask, 0);
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120 #endif
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121 }
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122
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123 void
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124 octave_thread_manager::block_interrupt_signal (void)
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125 {
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126 block_or_unblock_signal (SIG_BLOCK, SIGINT);
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127 }
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128
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129 void
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130 octave_thread_manager::unblock_interrupt_signal (void)
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131 {
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132 block_or_unblock_signal (SIG_UNBLOCK, SIGINT);
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133 }
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134
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135 octave_base_thread_manager *
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136 octave_thread_manager::create_rep (void)
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137 {
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John W. Eaton <jwe@octave.org>
parents:
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138 #if defined (__WIN32__) && ! defined (__CYGWIN__)
b5bf26a054bd interrupt interpreter thread in GUI instead of calling "raise (SIGINT)"
John W. Eaton <jwe@octave.org>
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139 return new windows_thread_manager ();
b5bf26a054bd interrupt interpreter thread in GUI instead of calling "raise (SIGINT)"
John W. Eaton <jwe@octave.org>
parents:
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140 #else
b5bf26a054bd interrupt interpreter thread in GUI instead of calling "raise (SIGINT)"
John W. Eaton <jwe@octave.org>
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141 return new pthread_thread_manager ();
b5bf26a054bd interrupt interpreter thread in GUI instead of calling "raise (SIGINT)"
John W. Eaton <jwe@octave.org>
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142 #endif
b5bf26a054bd interrupt interpreter thread in GUI instead of calling "raise (SIGINT)"
John W. Eaton <jwe@octave.org>
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143 }