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1 /* |
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2 |
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3 Copyright (C) 1996 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 2, or (at your option) any |
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10 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, write to the Free |
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19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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20 |
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21 */ |
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22 |
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240
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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 #include <cstdlib> |
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28 #include <csignal> |
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29 |
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30 #include <new> |
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31 |
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32 #include <iostream.h> |
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33 |
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34 #ifdef HAVE_UNISTD_H |
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35 #ifdef HAVE_SYS_TYPES_H |
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36 #include <sys/types.h> |
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37 #endif |
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38 #include <unistd.h> |
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39 #endif |
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40 |
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41 #include "error.h" |
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42 #include "load-save.h" |
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43 #include "pager.h" |
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44 #include "sighandlers.h" |
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45 #include "syswait.h" |
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46 #include "toplev.h" |
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47 #include "utils.h" |
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48 |
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49 // Nonzero means we have already printed a message for this series of |
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50 // SIGPIPES. We assume that the writer will eventually give up. |
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51 int pipe_handler_error_count = 0; |
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52 |
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53 // Nonzero means we can be interrupted. |
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54 int can_interrupt = 0; |
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55 |
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2016
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56 // Allow us to save the signal mask and then restore it to the most |
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57 // recently saved value. This is necessary when using the POSIX |
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58 // signal handling interface on some systems calling longjmp out of |
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59 // the signal handler to get to the top level on an interrupt doesn't |
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60 // restore the original signal mask. Alternatively, we could use |
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61 // sigsetjmp/siglongjmp, but saving and restoring the signal mask |
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62 // ourselves works ok and seems simpler just now. |
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63 |
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64 #if defined (HAVE_POSIX_SIGNALS) |
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65 static sigset_t octave_signal_mask; |
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66 #endif |
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67 |
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68 #if RETSIGTYPE == void |
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69 #define SIGHANDLER_RETURN(status) return |
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70 #else |
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71 #define SIGHANDLER_RETURN(status) return status |
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72 #endif |
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73 |
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74 #if defined (MUST_REINSTALL_SIGHANDLERS) |
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75 #define MAYBE_REINSTALL_SIGHANDLER(sig, handler) \ |
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76 octave_set_signal_handler (sig, handler) |
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77 #else |
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78 #define MAYBE_REINSTALL_SIGHANDLER(sig, handler) \ |
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79 do { } while (0) |
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80 #endif |
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81 |
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82 #if defined (__EMX__) |
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83 #define MAYBE_ACK_SIGNAL(sig) \ |
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84 octave_set_signal_handler (sig, SIG_ACK) |
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85 #else |
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86 #define MAYBE_ACK_SIGNAL(sig) \ |
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87 do { } while (0) |
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88 #endif |
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89 |
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90 // The following signal blocking stuff is stolen from bash: |
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91 |
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92 #define BLOCK_SIGNAL(sig, nvar, ovar) \ |
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93 do \ |
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94 { \ |
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95 sigemptyset (&nvar); \ |
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96 sigaddset (&nvar, sig); \ |
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97 sigemptyset (&ovar); \ |
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98 sigprocmask (SIG_BLOCK, &nvar, &ovar); \ |
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99 } \ |
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100 while (0) |
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101 |
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102 #if defined (HAVE_POSIX_SIGNALS) |
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103 #define BLOCK_CHILD(nvar, ovar) BLOCK_SIGNAL (SIGCHLD, nvar, ovar) |
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104 #define UNBLOCK_CHILD(ovar) sigprocmask (SIG_SETMASK, &ovar, 0) |
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105 #else |
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106 #define BLOCK_CHILD(nvar, ovar) ovar = sigblock (sigmask (SIGCHLD)) |
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107 #define UNBLOCK_CHILD(ovar) sigsetmask (ovar) |
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108 #endif |
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109 |
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110 void |
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111 octave_save_signal_mask (void) |
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112 { |
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113 #if defined (HAVE_POSIX_SIGNALS) |
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114 sigprocmask (0, 0, &octave_signal_mask); |
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115 #endif |
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116 } |
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117 |
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118 void |
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119 octave_restore_signal_mask (void) |
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120 { |
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121 #if defined (HAVE_POSIX_SIGNALS) |
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122 sigprocmask (SIG_SETMASK, &octave_signal_mask, 0); |
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123 #endif |
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124 } |
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125 |
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126 struct |
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127 octave_interrupt_handler |
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128 { |
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129 #ifdef SIGINT |
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130 sig_handler *int_handler; |
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131 #endif |
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132 |
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133 #ifdef SIGBREAK |
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134 sig_handler *brk_handler; |
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135 #endif |
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136 }; |
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137 |
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138 static octave_interrupt_handler the_interrupt_handler; |
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139 |
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140 static void |
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141 my_friendly_exit (const char *sig_name, int sig_number) |
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142 { |
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143 static bool been_there_done_that = false; |
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144 |
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145 if (been_there_done_that) |
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146 { |
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147 #if defined (SIGABRT) |
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148 octave_set_signal_handler (SIGABRT, SIG_DFL); |
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149 #endif |
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150 |
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151 error ("attempted clean up seems to have failed -- aborting..."); |
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152 |
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153 abort (); |
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154 } |
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155 else |
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156 { |
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157 been_there_done_that = true; |
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158 |
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159 error ("%s -- stopping myself...", sig_name); |
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160 |
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161 save_user_variables (); |
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162 |
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163 clean_up_and_exit (sig_number); |
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164 } |
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165 } |
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166 |
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167 // I know, not really a signal handler. |
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168 |
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169 static void |
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170 octave_new_handler (void) |
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171 { |
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172 error ("memory exhausted -- trying to return to prompt"); |
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173 |
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174 if (can_interrupt) |
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175 { |
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176 jump_to_top_level (); |
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177 panic_impossible (); |
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178 } |
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179 else |
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180 my_friendly_exit ("operator new", 1); |
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181 } |
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182 |
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183 sig_handler * |
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184 octave_set_signal_handler (int sig, sig_handler *handler) |
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185 { |
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186 #if defined (HAVE_POSIX_SIGNALS) |
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187 struct sigaction act, oact; |
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188 act.sa_handler = handler; |
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189 act.sa_flags = 0; |
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190 sigemptyset (&act.sa_mask); |
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191 sigemptyset (&oact.sa_mask); |
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192 sigaction (sig, &act, &oact); |
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193 return oact.sa_handler; |
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194 #else |
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195 return signal (sig, handler); |
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196 #endif |
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197 } |
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198 |
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199 static RETSIGTYPE |
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200 generic_sig_handler (int sig) |
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201 { |
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202 my_friendly_exit (sys_siglist[sig], sig); |
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203 |
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204 SIGHANDLER_RETURN (0); |
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205 } |
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206 |
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207 // Handle SIGCHLD. |
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208 |
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209 static RETSIGTYPE |
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210 sigchld_handler (int /* sig */) |
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211 { |
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212 volatile octave_interrupt_handler *saved_interrupt_handler |
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213 = octave_ignore_interrupts (); |
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214 |
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215 // I wonder if this is really right, or if SIGCHLD should just be |
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216 // blocked on OS/2 systems the same as for systems with POSIX signal |
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217 // functions. |
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218 |
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219 #if defined (__EMX__) |
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220 volatile sig_handler *saved_sigchld_handler |
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221 = octave_set_signal_handler (SIGCHLD, SIG_IGN); |
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222 #endif |
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223 |
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224 sigset_t set, oset; |
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225 |
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226 BLOCK_CHILD (set, oset); |
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227 |
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228 int n = octave_child_list::length (); |
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229 |
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230 if (n == 0) |
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231 { |
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232 waitpid (-1, 0, WNOHANG); |
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233 } |
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234 else |
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235 { |
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236 for (int i = 0; i < n; i++) |
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237 { |
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238 octave_child& elt = octave_child_list::elem (i); |
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239 |
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240 pid_t pid = elt.pid; |
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241 |
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242 if (pid > 0) |
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243 { |
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244 int status; |
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245 |
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246 if (waitpid (pid, &status, WNOHANG) > 0) |
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247 { |
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248 elt.pid = -1; |
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249 |
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250 octave_child::dead_child_handler f = elt.handler; |
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251 |
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252 if (f) |
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253 f (pid, status); |
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254 |
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255 break; |
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256 } |
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257 } |
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258 } |
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259 } |
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260 |
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261 octave_set_interrupt_handler (saved_interrupt_handler); |
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262 |
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263 UNBLOCK_CHILD (oset); |
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264 |
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265 #ifdef __EMX__ |
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266 octave_set_signal_handler (SIGCHLD, saved_sigchld_handler); |
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267 #endif |
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268 |
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269 MAYBE_ACK_SIGNAL (SIGCHLD); |
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270 |
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271 MAYBE_REINSTALL_SIGHANDLER (SIGCHLD, sigchld_handler); |
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272 |
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273 SIGHANDLER_RETURN (0); |
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274 } |
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275 |
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276 #if defined (__alpha__) |
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277 static RETSIGTYPE |
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278 sigfpe_handler (int /* sig */) |
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279 { |
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280 MAYBE_ACK_SIGNAL (SIGFPE); |
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281 |
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282 MAYBE_REINSTALL_SIGHANDLER (SIGFPE, sigfpe_handler); |
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283 |
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284 error ("floating point exception -- trying to return to prompt"); |
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285 |
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286 if (can_interrupt) |
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287 { |
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288 jump_to_top_level (); |
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289 panic_impossible (); |
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290 } |
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291 |
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292 SIGHANDLER_RETURN (0); |
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293 } |
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294 #endif |
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295 |
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296 // Handle SIGINT by restarting the parser (see octave.cc). |
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297 // |
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298 // This also has to work for SIGBREAK (on systems that have it), so we |
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299 // use the value of sig, instead of just assuming that it is called |
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300 // for SIGINT only. |
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301 |
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302 static RETSIGTYPE |
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303 sigint_handler (int sig) |
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304 { |
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305 MAYBE_ACK_SIGNAL (sig); |
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306 |
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307 MAYBE_REINSTALL_SIGHANDLER (sig, sigint_handler); |
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308 |
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309 if (can_interrupt) |
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310 { |
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311 jump_to_top_level (); |
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312 panic_impossible (); |
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313 } |
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314 |
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315 SIGHANDLER_RETURN (0); |
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316 } |
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317 |
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318 static RETSIGTYPE |
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319 sigpipe_handler (int /* sig */) |
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320 { |
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321 MAYBE_ACK_SIGNAL (SIGPIPE); |
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322 |
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323 MAYBE_REINSTALL_SIGHANDLER (SIGPIPE, sigpipe_handler); |
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324 |
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325 if (pipe_handler_error_count++ == 0) |
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326 warning ("broken pipe"); |
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327 |
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328 // Don't loop forever on account of this. |
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329 |
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330 if (pipe_handler_error_count > 100) |
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331 jump_to_top_level (); |
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332 |
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333 SIGHANDLER_RETURN (0); |
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334 } |
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335 |
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336 void |
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337 octave_catch_interrupts (void) |
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338 { |
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339 #ifdef SIGINT |
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340 octave_set_signal_handler (SIGINT, sigint_handler); |
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341 |
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342 the_interrupt_handler.int_handler = sigint_handler; |
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343 #endif |
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344 |
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345 #ifdef SIGBREAK |
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346 octave_set_signal_handler (SIGBREAK, sigint_handler); |
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347 |
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348 the_interrupt_handler.brk_handler = sigint_handler; |
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349 #endif |
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350 } |
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351 |
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352 octave_interrupt_handler * |
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353 octave_ignore_interrupts (void) |
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354 { |
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355 #ifdef SIGINT |
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356 the_interrupt_handler.int_handler |
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357 = octave_set_signal_handler (SIGINT, SIG_IGN); |
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358 #endif |
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359 |
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360 #ifdef SIGBREAK |
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361 the_interrupt_handler.int_handler |
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362 = octave_set_signal_handler (SIGBREAK, SIG_IGN); |
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363 #endif |
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364 |
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365 return &the_interrupt_handler; |
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366 } |
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367 |
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368 octave_interrupt_handler * |
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369 octave_set_interrupt_handler (const volatile octave_interrupt_handler *h) |
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370 { |
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371 if (h) |
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372 { |
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373 #ifdef SIGINT |
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374 the_interrupt_handler.int_handler |
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375 = octave_set_signal_handler (SIGINT, h->int_handler); |
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376 #endif |
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377 |
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378 #ifdef SIGBREAK |
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379 the_interrupt_handler.int_handler |
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380 = octave_set_signal_handler (SIGBREAK, h->brk_handler); |
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381 #endif |
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382 } |
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383 |
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384 return &the_interrupt_handler; |
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385 } |
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386 |
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635
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387 // Install all the handlers for the signals we might care about. |
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388 |
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389 void |
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390 install_signal_handlers (void) |
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391 { |
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392 set_new_handler (octave_new_handler); |
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393 |
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394 octave_catch_interrupts (); |
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395 |
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396 #ifdef SIGABRT |
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397 octave_set_signal_handler (SIGABRT, generic_sig_handler); |
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1
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398 #endif |
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399 |
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400 #ifdef SIGALRM |
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401 octave_set_signal_handler (SIGALRM, generic_sig_handler); |
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1
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402 #endif |
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403 |
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404 #ifdef SIGBUS |
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405 octave_set_signal_handler (SIGBUS, generic_sig_handler); |
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1
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406 #endif |
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407 |
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1230
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408 #ifdef SIGCHLD |
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409 octave_set_signal_handler (SIGCHLD, sigchld_handler); |
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1230
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410 #endif |
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411 |
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1
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412 #ifdef SIGEMT |
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413 octave_set_signal_handler (SIGEMT, generic_sig_handler); |
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1
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414 #endif |
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415 |
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416 #ifdef SIGFPE |
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417 #if defined (__alpha__) |
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1446
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418 octave_set_signal_handler (SIGFPE, sigfpe_handler); |
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419 #else |
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420 octave_set_signal_handler (SIGFPE, generic_sig_handler); |
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421 #endif |
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1373
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422 #endif |
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423 |
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424 #ifdef SIGHUP |
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425 octave_set_signal_handler (SIGHUP, generic_sig_handler); |
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1
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426 #endif |
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427 |
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428 #ifdef SIGILL |
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429 octave_set_signal_handler (SIGILL, generic_sig_handler); |
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1
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430 #endif |
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431 |
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432 #ifdef SIGIOT |
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433 octave_set_signal_handler (SIGIOT, generic_sig_handler); |
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1
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434 #endif |
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435 |
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436 #ifdef SIGLOST |
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437 octave_set_signal_handler (SIGLOST, generic_sig_handler); |
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1
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438 #endif |
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439 |
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440 #ifdef SIGPIPE |
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1446
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441 octave_set_signal_handler (SIGPIPE, sigpipe_handler); |
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1
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442 #endif |
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443 |
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444 #ifdef SIGPOLL |
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1446
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445 octave_set_signal_handler (SIGPOLL, SIG_IGN); |
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1
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446 #endif |
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447 |
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448 #ifdef SIGPROF |
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1446
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449 octave_set_signal_handler (SIGPROF, generic_sig_handler); |
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1
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450 #endif |
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451 |
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452 #ifdef SIGQUIT |
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1446
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453 octave_set_signal_handler (SIGQUIT, generic_sig_handler); |
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1
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454 #endif |
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455 |
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456 #ifdef SIGSEGV |
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1446
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457 octave_set_signal_handler (SIGSEGV, generic_sig_handler); |
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1
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458 #endif |
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459 |
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460 #ifdef SIGSYS |
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1446
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461 octave_set_signal_handler (SIGSYS, generic_sig_handler); |
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1
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462 #endif |
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463 |
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464 #ifdef SIGTERM |
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1446
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465 octave_set_signal_handler (SIGTERM, generic_sig_handler); |
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1
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466 #endif |
|
|
467 |
|
|
468 #ifdef SIGTRAP |
|
1446
|
469 octave_set_signal_handler (SIGTRAP, generic_sig_handler); |
|
1
|
470 #endif |
|
|
471 |
|
|
472 #ifdef SIGUSR1 |
|
1446
|
473 octave_set_signal_handler (SIGUSR1, generic_sig_handler); |
|
1
|
474 #endif |
|
|
475 |
|
|
476 #ifdef SIGUSR2 |
|
1446
|
477 octave_set_signal_handler (SIGUSR2, generic_sig_handler); |
|
1
|
478 #endif |
|
|
479 |
|
|
480 #ifdef SIGVTALRM |
|
1446
|
481 octave_set_signal_handler (SIGVTALRM, generic_sig_handler); |
|
1
|
482 #endif |
|
|
483 |
|
895
|
484 #ifdef SIGIO |
|
1446
|
485 octave_set_signal_handler (SIGIO, SIG_IGN); |
|
895
|
486 #endif |
|
|
487 |
|
1
|
488 #ifdef SIGXCPU |
|
1446
|
489 octave_set_signal_handler (SIGXCPU, generic_sig_handler); |
|
1
|
490 #endif |
|
|
491 |
|
|
492 #ifdef SIGXFSZ |
|
1446
|
493 octave_set_signal_handler (SIGXFSZ, generic_sig_handler); |
|
1
|
494 #endif |
|
|
495 } |
|
|
496 |
|
886
|
497 #ifndef HAVE_SYS_SIGLIST |
|
839
|
498 char *sys_siglist[NSIG + 1] = |
|
|
499 { |
|
|
500 #ifdef AIX |
|
|
501 /* AIX has changed the signals a bit */ |
|
|
502 "bogus signal", /* 0 */ |
|
|
503 "hangup", /* 1 SIGHUP */ |
|
|
504 "interrupt", /* 2 SIGINT */ |
|
|
505 "quit", /* 3 SIGQUIT */ |
|
|
506 "illegal instruction", /* 4 SIGILL */ |
|
|
507 "trace trap", /* 5 SIGTRAP */ |
|
|
508 "IOT instruction", /* 6 SIGIOT */ |
|
|
509 "crash likely", /* 7 SIGDANGER */ |
|
|
510 "floating point exception", /* 8 SIGFPE */ |
|
|
511 "kill", /* 9 SIGKILL */ |
|
|
512 "bus error", /* 10 SIGBUS */ |
|
|
513 "segmentation violation", /* 11 SIGSEGV */ |
|
|
514 "bad argument to system call", /* 12 SIGSYS */ |
|
|
515 "write on a pipe with no one to read it", /* 13 SIGPIPE */ |
|
|
516 "alarm clock", /* 14 SIGALRM */ |
|
|
517 "software termination signum", /* 15 SIGTERM */ |
|
|
518 "user defined signal 1", /* 16 SIGUSR1 */ |
|
|
519 "user defined signal 2", /* 17 SIGUSR2 */ |
|
|
520 "death of a child", /* 18 SIGCLD */ |
|
|
521 "power-fail restart", /* 19 SIGPWR */ |
|
|
522 "bogus signal", /* 20 */ |
|
|
523 "bogus signal", /* 21 */ |
|
|
524 "bogus signal", /* 22 */ |
|
|
525 "bogus signal", /* 23 */ |
|
|
526 "bogus signal", /* 24 */ |
|
|
527 "LAN I/O interrupt", /* 25 SIGAIO */ |
|
|
528 "PTY I/O interrupt", /* 26 SIGPTY */ |
|
|
529 "I/O intervention required", /* 27 SIGIOINT */ |
|
|
530 "HFT grant", /* 28 SIGGRANT */ |
|
|
531 "HFT retract", /* 29 SIGRETRACT */ |
|
|
532 "HFT sound done", /* 30 SIGSOUND */ |
|
|
533 "HFT input ready", /* 31 SIGMSG */ |
|
|
534 #else /* not AIX */ |
|
2512
|
535 #ifdef __EMX__ |
|
|
536 "bogus signal #0", /* 0 */ |
|
|
537 "hangup", /* 1 SIGHUP */ |
|
|
538 "interrupt (Ctrl-C)", /* 2 SIGINT (Ctrl-C) */ |
|
|
539 "quit", /* 3 SIGQUIT */ |
|
|
540 "illegal instruction", /* 4 SIGILL */ |
|
|
541 "single step", /* 5 SIGTRAP */ |
|
|
542 "abort", /* 6 SIGABRT */ |
|
|
543 "EMT instruction", /* 7 SIGEMT */ |
|
|
544 "floating point exception", /* 8 SIGFPE */ |
|
|
545 "kill", /* 9 SIGKILL */ |
|
|
546 "bus error", /* 10 SIGBUS */ |
|
|
547 "segmentation violation", /* 11 SIGSEGV */ |
|
|
548 "bad argument to system call", /* 12 SIGSYS */ |
|
|
549 "broken pipe", /* 13 SIGPIPE */ |
|
|
550 "alarm clock", /* 14 SIGALRM */ |
|
|
551 "software termination signum", /* 15 SIGTERM */ |
|
|
552 "user defined signal 1", /* 16 SIGUSR1 */ |
|
|
553 "user defined signal 2", /* 17 SIGUSR2 */ |
|
|
554 "death of a child", /* 18 SIGCHLD */ |
|
|
555 "bogus signal #20", /* 19 */ |
|
|
556 "bogus signal #21", /* 20 */ |
|
|
557 "break (Ctrl-Break)", /* 21 SIGBREAK */ |
|
|
558 #else /* not __EMX__ */ |
|
839
|
559 "bogus signal", /* 0 */ |
|
|
560 "hangup", /* 1 SIGHUP */ |
|
|
561 "interrupt", /* 2 SIGINT */ |
|
|
562 "quit", /* 3 SIGQUIT */ |
|
|
563 "illegal instruction", /* 4 SIGILL */ |
|
|
564 "trace trap", /* 5 SIGTRAP */ |
|
|
565 "IOT instruction", /* 6 SIGIOT */ |
|
|
566 "EMT instruction", /* 7 SIGEMT */ |
|
|
567 "floating point exception", /* 8 SIGFPE */ |
|
|
568 "kill", /* 9 SIGKILL */ |
|
|
569 "bus error", /* 10 SIGBUS */ |
|
|
570 "segmentation violation", /* 11 SIGSEGV */ |
|
|
571 "bad argument to system call", /* 12 SIGSYS */ |
|
|
572 "write on a pipe with no one to read it", /* 13 SIGPIPE */ |
|
|
573 "alarm clock", /* 14 SIGALRM */ |
|
|
574 "software termination signum", /* 15 SIGTERM */ |
|
|
575 "user defined signal 1", /* 16 SIGUSR1 */ |
|
|
576 "user defined signal 2", /* 17 SIGUSR2 */ |
|
|
577 "death of a child", /* 18 SIGCLD */ |
|
|
578 "power-fail restart", /* 19 SIGPWR */ |
|
|
579 #ifdef sun |
|
|
580 "window size change", /* 20 SIGWINCH */ |
|
|
581 "urgent socket condition", /* 21 SIGURG */ |
|
|
582 "pollable event occured", /* 22 SIGPOLL */ |
|
|
583 "stop (cannot be caught or ignored)", /* 23 SIGSTOP */ |
|
|
584 "user stop requested from tty", /* 24 SIGTSTP */ |
|
|
585 "stopped process has been continued", /* 25 SIGCONT */ |
|
|
586 "background tty read attempted", /* 26 SIGTTIN */ |
|
|
587 "background tty write attempted", /* 27 SIGTTOU */ |
|
|
588 "virtual timer expired", /* 28 SIGVTALRM */ |
|
|
589 "profiling timer expired", /* 29 SIGPROF */ |
|
|
590 "exceeded cpu limit", /* 30 SIGXCPU */ |
|
|
591 "exceeded file size limit", /* 31 SIGXFSZ */ |
|
|
592 "process's lwps are blocked", /* 32 SIGWAITING */ |
|
|
593 "special signal used by thread library", /* 33 SIGLWP */ |
|
|
594 #ifdef SIGFREEZE |
|
|
595 "Special Signal Used By CPR", /* 34 SIGFREEZE */ |
|
|
596 #endif |
|
|
597 #ifdef SIGTHAW |
|
|
598 "Special Signal Used By CPR", /* 35 SIGTHAW */ |
|
|
599 #endif |
|
|
600 #endif /* sun */ |
|
2512
|
601 #endif /* __EMX__ */ |
|
|
602 #endif /* AIX */ |
|
839
|
603 0 |
|
|
604 }; |
|
|
605 #endif |
|
|
606 |
|
2209
|
607 octave_child_list *octave_child_list::instance = 0; |
|
|
608 |
|
|
609 void |
|
|
610 octave_child_list::do_insert (pid_t pid, octave_child::dead_child_handler f) |
|
|
611 { |
|
|
612 // Insert item in first open slot, increasing size of list if |
|
|
613 // necessary. |
|
|
614 |
|
|
615 bool enlarge = true; |
|
|
616 |
|
|
617 for (int i = 0; i < curr_len; i++) |
|
|
618 { |
|
2305
|
619 octave_child& tmp = list (i); |
|
2209
|
620 |
|
|
621 if (tmp.pid < 0) |
|
|
622 { |
|
2305
|
623 list (i) = octave_child (pid, f); |
|
2209
|
624 enlarge = false; |
|
|
625 break; |
|
|
626 } |
|
|
627 } |
|
|
628 |
|
|
629 if (enlarge) |
|
|
630 { |
|
|
631 int total_len = list.length (); |
|
|
632 |
|
|
633 if (curr_len == total_len) |
|
|
634 { |
|
|
635 if (total_len == 0) |
|
|
636 list.resize (16); |
|
|
637 else |
|
|
638 list.resize (total_len * 2); |
|
|
639 } |
|
|
640 |
|
2305
|
641 list (curr_len) = octave_child (pid, f); |
|
2209
|
642 curr_len++; |
|
|
643 } |
|
|
644 } |
|
|
645 |
|
|
646 void |
|
|
647 octave_child_list::insert (pid_t pid, octave_child::dead_child_handler f) |
|
|
648 { |
|
|
649 if (! instance) |
|
|
650 instance = new octave_child_list (); |
|
|
651 |
|
|
652 if (instance) |
|
|
653 instance->do_insert (pid, f); |
|
|
654 else |
|
|
655 panic_impossible (); |
|
|
656 } |
|
|
657 |
|
2210
|
658 void |
|
|
659 octave_child_list::do_remove (pid_t pid) |
|
|
660 { |
|
|
661 // Mark the record for PID invalid. |
|
|
662 |
|
|
663 for (int i = 0; i < curr_len; i++) |
|
|
664 { |
|
2305
|
665 octave_child& tmp = list (i); |
|
2210
|
666 |
|
|
667 if (tmp.pid == pid) |
|
|
668 { |
|
|
669 tmp.pid = -1; |
|
|
670 break; |
|
|
671 } |
|
|
672 } |
|
|
673 } |
|
|
674 |
|
|
675 void |
|
|
676 octave_child_list::remove (pid_t pid) |
|
|
677 { |
|
|
678 if (! instance) |
|
|
679 instance = new octave_child_list (); |
|
|
680 |
|
|
681 if (instance) |
|
|
682 instance->do_remove (pid); |
|
|
683 else |
|
|
684 panic_impossible (); |
|
|
685 } |
|
|
686 |
|
1
|
687 /* |
|
|
688 ;;; Local Variables: *** |
|
|
689 ;;; mode: C++ *** |
|
|
690 ;;; End: *** |
|
|
691 */ |
