1 | /* |
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2 | * $Id$ |
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3 | */ |
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4 | |
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5 | #include <assert.h> |
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6 | #include <errno.h> |
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7 | #include <pthread.h> |
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8 | #include <signal.h> |
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9 | |
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10 | #include <rtems/system.h> |
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11 | #include <rtems/score/isr.h> |
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12 | #include <rtems/score/thread.h> |
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13 | #include <rtems/score/tqdata.h> |
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14 | #include <rtems/score/wkspace.h> |
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15 | #include <rtems/seterr.h> |
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16 | #include <rtems/posix/threadsup.h> |
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17 | #include <rtems/posix/psignal.h> |
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18 | #include <rtems/posix/pthread.h> |
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19 | #include <rtems/posix/time.h> |
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20 | #include <stdio.h> |
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21 | |
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22 | |
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23 | /* |
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24 | * Currently 32 signals numbered 1-32 are defined |
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25 | */ |
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26 | |
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27 | #define SIGNAL_EMPTY_MASK 0x00000000 |
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28 | #define SIGNAL_ALL_MASK 0xffffffff |
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29 | |
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30 | #define signo_to_mask( _sig ) (1 << ((_sig) - 1)) |
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31 | |
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32 | #define is_valid_signo( _sig ) \ |
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33 | ((_sig) >= 1 && (_sig) <= 32 ) |
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34 | |
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35 | /*** PROCESS WIDE STUFF ****/ |
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36 | |
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37 | sigset_t _POSIX_signals_Pending; |
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38 | |
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39 | void _POSIX_signals_Abnormal_termination_handler( int signo ) |
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40 | { |
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41 | exit( 1 ); |
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42 | } |
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43 | |
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44 | #define SIG_ARRAY_MAX (SIGRTMAX + 1) |
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45 | struct sigaction _POSIX_signals_Default_vectors[ SIG_ARRAY_MAX ] = { |
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46 | /* NO SIGNAL 0 */ SIGACTION_IGNORE, |
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47 | /* SIGHUP 1 */ SIGACTION_TERMINATE, |
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48 | /* SIGINT 2 */ SIGACTION_TERMINATE, |
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49 | /* SIGQUIT 3 */ SIGACTION_TERMINATE, |
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50 | /* SIGILL 4 */ SIGACTION_TERMINATE, |
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51 | /* SIGTRAP 5 */ SIGACTION_TERMINATE, |
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52 | /* SIGIOT 6 */ SIGACTION_TERMINATE, |
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53 | /* SIGABRT 6 SIGACTION_TERMINATE, -- alias for SIGIOT */ |
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54 | /* SIGEMT 7 */ SIGACTION_TERMINATE, |
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55 | /* SIGFPE 8 */ SIGACTION_TERMINATE, |
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56 | /* SIGKILL 9 */ SIGACTION_TERMINATE, |
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57 | /* SIGBUS 10 */ SIGACTION_TERMINATE, |
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58 | /* SIGSEGV 11 */ SIGACTION_TERMINATE, |
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59 | /* SIGSYS 12 */ SIGACTION_TERMINATE, |
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60 | /* SIGPIPE 13 */ SIGACTION_TERMINATE, |
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61 | /* SIGALRM 14 */ SIGACTION_TERMINATE, |
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62 | /* SIGTERM 15 */ SIGACTION_TERMINATE, |
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63 | /* SIGUSR1 16 */ SIGACTION_TERMINATE, |
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64 | /* SIGUSR2 17 */ SIGACTION_TERMINATE, |
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65 | /* SIGRTMIN 18 */ SIGACTION_TERMINATE, |
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66 | /* SIGRT 19 */ SIGACTION_TERMINATE, |
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67 | /* SIGRT 20 */ SIGACTION_TERMINATE, |
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68 | /* SIGRT 21 */ SIGACTION_TERMINATE, |
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69 | /* SIGRT 22 */ SIGACTION_TERMINATE, |
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70 | /* SIGRT 23 */ SIGACTION_TERMINATE, |
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71 | /* SIGRT 24 */ SIGACTION_TERMINATE, |
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72 | /* SIGRT 25 */ SIGACTION_TERMINATE, |
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73 | /* SIGRT 26 */ SIGACTION_TERMINATE, |
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74 | /* SIGRT 27 */ SIGACTION_TERMINATE, |
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75 | /* SIGRT 28 */ SIGACTION_TERMINATE, |
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76 | /* SIGRT 29 */ SIGACTION_TERMINATE, |
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77 | /* SIGRT 30 */ SIGACTION_TERMINATE, |
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78 | /* SIGRT 31 */ SIGACTION_TERMINATE, |
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79 | /* SIGRTMAX 32 */ SIGACTION_TERMINATE |
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80 | }; |
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81 | |
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82 | struct sigaction _POSIX_signals_Vectors[ SIG_ARRAY_MAX ]; |
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83 | |
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84 | Watchdog_Control _POSIX_signals_Alarm_timer; |
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85 | |
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86 | Thread_queue_Control _POSIX_signals_Wait_queue; |
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87 | |
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88 | Chain_Control _POSIX_signals_Inactive_siginfo; |
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89 | Chain_Control _POSIX_signals_Siginfo[ SIG_ARRAY_MAX ]; |
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90 | |
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91 | /*PAGE |
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92 | * |
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93 | * XXX - move these |
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94 | */ |
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95 | |
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96 | #define _States_Is_interruptible_signal( _states ) \ |
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97 | ( ((_states) & \ |
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98 | (STATES_WAITING_FOR_SIGNAL|STATES_INTERRUPTIBLE_BY_SIGNAL)) == \ |
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99 | (STATES_WAITING_FOR_SIGNAL|STATES_INTERRUPTIBLE_BY_SIGNAL)) |
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100 | |
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101 | /* |
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102 | * _POSIX_signals_Post_switch_extension |
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103 | */ |
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104 | |
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105 | void _POSIX_signals_Post_switch_extension( |
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106 | Thread_Control *the_thread |
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107 | ) |
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108 | { |
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109 | POSIX_API_Control *api; |
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110 | int signo; |
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111 | ISR_Level level; |
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112 | |
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113 | api = the_thread->API_Extensions[ THREAD_API_POSIX ]; |
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114 | |
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115 | /* |
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116 | * If we invoke any user code, there is the possibility that |
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117 | * a new signal has been posted that we should process so we |
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118 | * restart the loop if a signal handler was invoked. |
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119 | * |
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120 | * The first thing done is to check there are any signals to be |
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121 | * processed at all. No point in doing this loop otherwise. |
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122 | */ |
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123 | |
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124 | restart: |
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125 | _ISR_Disable( level ); |
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126 | if ( !(~api->signals_blocked & |
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127 | (api->signals_pending | _POSIX_signals_Pending)) ) { |
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128 | _ISR_Enable( level ); |
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129 | return; |
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130 | } |
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131 | _ISR_Enable( level ); |
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132 | |
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133 | for ( signo = SIGRTMIN ; signo <= SIGRTMAX ; signo++ ) { |
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134 | |
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135 | if ( _POSIX_signals_Check_signal( api, signo, FALSE ) ) |
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136 | goto restart; |
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137 | |
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138 | if ( _POSIX_signals_Check_signal( api, signo, TRUE ) ) |
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139 | goto restart; |
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140 | |
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141 | } |
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142 | |
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143 | /* XXX - add __SIGFIRSTNOTRT or something like that to newlib signal .h */ |
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144 | |
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145 | for ( signo = SIGHUP ; signo <= __SIGLASTNOTRT ; signo++ ) { |
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146 | |
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147 | if ( _POSIX_signals_Check_signal( api, signo, FALSE ) ) |
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148 | goto restart; |
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149 | |
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150 | if ( _POSIX_signals_Check_signal( api, signo, TRUE ) ) |
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151 | goto restart; |
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152 | |
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153 | } |
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154 | |
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155 | } |
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156 | |
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157 | /*PAGE |
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158 | * |
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159 | * _POSIX_signals_Alarm_TSR |
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160 | */ |
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161 | |
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162 | void _POSIX_signals_Alarm_TSR( |
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163 | Objects_Id id, |
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164 | void *argument |
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165 | ) |
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166 | { |
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167 | int status; |
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168 | |
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169 | status = kill( getpid(), SIGALRM ); |
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170 | /* XXX can't print from an ISR, should this be fatal? */ |
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171 | assert( !status ); |
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172 | } |
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173 | |
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174 | /*PAGE |
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175 | * |
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176 | * _POSIX_signals_Manager_Initialization |
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177 | */ |
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178 | |
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179 | void _POSIX_signals_Manager_Initialization( |
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180 | int maximum_queued_signals |
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181 | ) |
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182 | { |
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183 | unsigned32 signo; |
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184 | |
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185 | /* |
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186 | * Insure we have the same number of vectors and default vector entries |
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187 | */ |
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188 | |
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189 | assert( |
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190 | sizeof(_POSIX_signals_Vectors) == sizeof(_POSIX_signals_Default_vectors) |
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191 | ); |
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192 | |
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193 | memcpy( |
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194 | _POSIX_signals_Vectors, |
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195 | _POSIX_signals_Default_vectors, |
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196 | sizeof( _POSIX_signals_Vectors ) |
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197 | ); |
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198 | |
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199 | /* |
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200 | * Initialize the set of pending signals for the entire process |
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201 | */ |
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202 | |
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203 | sigemptyset( &_POSIX_signals_Pending ); |
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204 | |
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205 | /* |
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206 | * Initialize the timer used to implement alarm(). |
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207 | */ |
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208 | |
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209 | _Watchdog_Initialize( |
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210 | &_POSIX_signals_Alarm_timer, |
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211 | _POSIX_signals_Alarm_TSR, |
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212 | 0, |
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213 | NULL |
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214 | ); |
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215 | |
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216 | /* |
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217 | * Initialize the queue we use to block for signals |
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218 | */ |
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219 | |
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220 | _Thread_queue_Initialize( |
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221 | &_POSIX_signals_Wait_queue, |
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222 | OBJECTS_NO_CLASS, |
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223 | THREAD_QUEUE_DISCIPLINE_PRIORITY, |
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224 | STATES_WAITING_FOR_SIGNAL | STATES_INTERRUPTIBLE_BY_SIGNAL, |
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225 | NULL, |
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226 | EAGAIN |
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227 | ); |
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228 | |
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229 | /* XXX status codes */ |
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230 | |
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231 | /* |
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232 | * Allocate the siginfo pools. |
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233 | */ |
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234 | |
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235 | for ( signo=1 ; signo<= SIGRTMAX ; signo++ ) |
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236 | _Chain_Initialize_empty( &_POSIX_signals_Siginfo[ signo ] ); |
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237 | |
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238 | _Chain_Initialize( |
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239 | &_POSIX_signals_Inactive_siginfo, |
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240 | _Workspace_Allocate_or_fatal_error( |
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241 | maximum_queued_signals * sizeof( POSIX_signals_Siginfo_node ) |
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242 | ), |
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243 | maximum_queued_signals, |
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244 | sizeof( POSIX_signals_Siginfo_node ) |
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245 | ); |
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246 | } |
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