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1 ------------------------------------------------------------------------------
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2 -- --
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3 -- GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS --
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4 -- --
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5 -- S Y S T E M . O S _ I N T E R F A C E --
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6 -- --
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7 -- B o d y --
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8 -- --
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9 -- Copyright (C) 1991-1994, Florida State University --
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131
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10 -- Copyright (C) 1995-2018, AdaCore --
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111
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11 -- --
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12 -- GNAT is free software; you can redistribute it and/or modify it under --
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13 -- terms of the GNU General Public License as published by the Free Soft- --
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14 -- ware Foundation; either version 3, or (at your option) any later ver- --
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15 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
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16 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
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17 -- or FITNESS FOR A PARTICULAR PURPOSE. --
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18 -- --
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19 -- As a special exception under Section 7 of GPL version 3, you are granted --
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20 -- additional permissions described in the GCC Runtime Library Exception, --
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21 -- version 3.1, as published by the Free Software Foundation. --
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22 -- --
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23 -- You should have received a copy of the GNU General Public License and --
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24 -- a copy of the GCC Runtime Library Exception along with this program; --
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25 -- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
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26 -- <http://www.gnu.org/licenses/>. --
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27 -- --
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28 -- GNARL was developed by the GNARL team at Florida State University. --
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29 -- Extensive contributions were provided by Ada Core Technologies, Inc. --
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30 -- --
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31 ------------------------------------------------------------------------------
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32
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33 -- This is a DCE version of this package.
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34 -- Currently HP-UX and SNI use this file
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35
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36 pragma Polling (Off);
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37 -- Turn off polling, we do not want ATC polling to take place during
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38 -- tasking operations. It causes infinite loops and other problems.
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39
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40 -- This package encapsulates all direct interfaces to OS services
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41 -- that are needed by children of System.
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42
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43 with Interfaces.C; use Interfaces.C;
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44
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45 package body System.OS_Interface is
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46
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47 -----------------
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48 -- To_Duration --
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49 -----------------
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50
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51 function To_Duration (TS : timespec) return Duration is
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52 begin
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53 return Duration (TS.tv_sec) + Duration (TS.tv_nsec) / 10#1#E9;
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54 end To_Duration;
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55
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56 -----------------
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57 -- To_Timespec --
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58 -----------------
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59
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60 function To_Timespec (D : Duration) return timespec is
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61 S : time_t;
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62 F : Duration;
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63
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64 begin
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65 S := time_t (Long_Long_Integer (D));
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66 F := D - Duration (S);
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67
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68 -- If F has negative value due to a round-up, adjust for positive F
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69 -- value.
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70 if F < 0.0 then
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71 S := S - 1;
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72 F := F + 1.0;
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73 end if;
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74
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75 return timespec'(tv_sec => S,
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76 tv_nsec => long (Long_Long_Integer (F * 10#1#E9)));
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77 end To_Timespec;
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78
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79 -------------------------
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80 -- POSIX.1c Section 3 --
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81 -------------------------
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82
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83 function sigwait
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84 (set : access sigset_t;
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85 sig : access Signal) return int
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86 is
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87 Result : int;
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88
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89 begin
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90 Result := sigwait (set);
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91
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92 if Result = -1 then
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93 sig.all := 0;
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94 return errno;
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95 end if;
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96
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97 sig.all := Signal (Result);
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98 return 0;
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99 end sigwait;
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100
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101 -- DCE_THREADS does not have pthread_kill. Instead, we just ignore it
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102
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103 function pthread_kill (thread : pthread_t; sig : Signal) return int is
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104 pragma Unreferenced (thread, sig);
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105 begin
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106 return 0;
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107 end pthread_kill;
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108
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109 --------------------------
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110 -- POSIX.1c Section 11 --
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111 --------------------------
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112
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113 -- For all following functions, DCE Threads has a non standard behavior.
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114 -- It sets errno but the standard Posix requires it to be returned.
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115
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116 function pthread_mutexattr_init
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117 (attr : access pthread_mutexattr_t) return int
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118 is
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119 function pthread_mutexattr_create
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120 (attr : access pthread_mutexattr_t) return int;
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121 pragma Import (C, pthread_mutexattr_create, "pthread_mutexattr_create");
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122
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123 begin
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124 if pthread_mutexattr_create (attr) /= 0 then
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125 return errno;
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126 else
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127 return 0;
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128 end if;
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129 end pthread_mutexattr_init;
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130
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131 function pthread_mutexattr_destroy
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132 (attr : access pthread_mutexattr_t) return int
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133 is
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134 function pthread_mutexattr_delete
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135 (attr : access pthread_mutexattr_t) return int;
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136 pragma Import (C, pthread_mutexattr_delete, "pthread_mutexattr_delete");
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137
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138 begin
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139 if pthread_mutexattr_delete (attr) /= 0 then
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140 return errno;
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141 else
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142 return 0;
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143 end if;
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144 end pthread_mutexattr_destroy;
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145
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146 function pthread_mutex_init
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147 (mutex : access pthread_mutex_t;
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148 attr : access pthread_mutexattr_t) return int
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149 is
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150 function pthread_mutex_init_base
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151 (mutex : access pthread_mutex_t;
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152 attr : pthread_mutexattr_t) return int;
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153 pragma Import (C, pthread_mutex_init_base, "pthread_mutex_init");
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154
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155 begin
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156 if pthread_mutex_init_base (mutex, attr.all) /= 0 then
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157 return errno;
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158 else
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159 return 0;
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160 end if;
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161 end pthread_mutex_init;
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162
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163 function pthread_mutex_destroy
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164 (mutex : access pthread_mutex_t) return int
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165 is
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166 function pthread_mutex_destroy_base
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167 (mutex : access pthread_mutex_t) return int;
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168 pragma Import (C, pthread_mutex_destroy_base, "pthread_mutex_destroy");
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169
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170 begin
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171 if pthread_mutex_destroy_base (mutex) /= 0 then
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172 return errno;
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173 else
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174 return 0;
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175 end if;
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176 end pthread_mutex_destroy;
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177
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178 function pthread_mutex_lock
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179 (mutex : access pthread_mutex_t) return int
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180 is
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181 function pthread_mutex_lock_base
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182 (mutex : access pthread_mutex_t) return int;
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183 pragma Import (C, pthread_mutex_lock_base, "pthread_mutex_lock");
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184
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185 begin
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186 if pthread_mutex_lock_base (mutex) /= 0 then
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187 return errno;
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188 else
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189 return 0;
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190 end if;
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191 end pthread_mutex_lock;
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192
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193 function pthread_mutex_unlock
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194 (mutex : access pthread_mutex_t) return int
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195 is
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196 function pthread_mutex_unlock_base
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197 (mutex : access pthread_mutex_t) return int;
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198 pragma Import (C, pthread_mutex_unlock_base, "pthread_mutex_unlock");
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199
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200 begin
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201 if pthread_mutex_unlock_base (mutex) /= 0 then
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202 return errno;
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203 else
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204 return 0;
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205 end if;
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206 end pthread_mutex_unlock;
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207
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208 function pthread_condattr_init
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209 (attr : access pthread_condattr_t) return int
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210 is
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211 function pthread_condattr_create
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212 (attr : access pthread_condattr_t) return int;
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213 pragma Import (C, pthread_condattr_create, "pthread_condattr_create");
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214
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215 begin
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216 if pthread_condattr_create (attr) /= 0 then
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217 return errno;
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218 else
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219 return 0;
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220 end if;
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221 end pthread_condattr_init;
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222
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223 function pthread_condattr_destroy
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224 (attr : access pthread_condattr_t) return int
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225 is
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226 function pthread_condattr_delete
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227 (attr : access pthread_condattr_t) return int;
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228 pragma Import (C, pthread_condattr_delete, "pthread_condattr_delete");
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229
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230 begin
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231 if pthread_condattr_delete (attr) /= 0 then
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232 return errno;
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233 else
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234 return 0;
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235 end if;
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236 end pthread_condattr_destroy;
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237
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238 function pthread_cond_init
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239 (cond : access pthread_cond_t;
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240 attr : access pthread_condattr_t) return int
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241 is
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242 function pthread_cond_init_base
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243 (cond : access pthread_cond_t;
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244 attr : pthread_condattr_t) return int;
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245 pragma Import (C, pthread_cond_init_base, "pthread_cond_init");
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246
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247 begin
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248 if pthread_cond_init_base (cond, attr.all) /= 0 then
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249 return errno;
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250 else
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251 return 0;
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252 end if;
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253 end pthread_cond_init;
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254
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255 function pthread_cond_destroy
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256 (cond : access pthread_cond_t) return int
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257 is
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258 function pthread_cond_destroy_base
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259 (cond : access pthread_cond_t) return int;
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260 pragma Import (C, pthread_cond_destroy_base, "pthread_cond_destroy");
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261
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262 begin
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263 if pthread_cond_destroy_base (cond) /= 0 then
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264 return errno;
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265 else
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266 return 0;
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267 end if;
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268 end pthread_cond_destroy;
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269
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270 function pthread_cond_signal
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271 (cond : access pthread_cond_t) return int
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272 is
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273 function pthread_cond_signal_base
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274 (cond : access pthread_cond_t) return int;
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275 pragma Import (C, pthread_cond_signal_base, "pthread_cond_signal");
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276
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277 begin
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278 if pthread_cond_signal_base (cond) /= 0 then
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279 return errno;
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280 else
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281 return 0;
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282 end if;
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283 end pthread_cond_signal;
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284
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285 function pthread_cond_wait
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286 (cond : access pthread_cond_t;
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287 mutex : access pthread_mutex_t) return int
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288 is
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289 function pthread_cond_wait_base
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290 (cond : access pthread_cond_t;
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291 mutex : access pthread_mutex_t) return int;
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292 pragma Import (C, pthread_cond_wait_base, "pthread_cond_wait");
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293
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294 begin
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295 if pthread_cond_wait_base (cond, mutex) /= 0 then
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296 return errno;
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297 else
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298 return 0;
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299 end if;
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300 end pthread_cond_wait;
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301
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302 function pthread_cond_timedwait
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303 (cond : access pthread_cond_t;
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304 mutex : access pthread_mutex_t;
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305 abstime : access timespec) return int
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306 is
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307 function pthread_cond_timedwait_base
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308 (cond : access pthread_cond_t;
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309 mutex : access pthread_mutex_t;
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310 abstime : access timespec) return int;
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311 pragma Import (C, pthread_cond_timedwait_base, "pthread_cond_timedwait");
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312
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313 begin
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314 if pthread_cond_timedwait_base (cond, mutex, abstime) /= 0 then
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315 return (if errno = EAGAIN then ETIMEDOUT else errno);
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316 else
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317 return 0;
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318 end if;
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319 end pthread_cond_timedwait;
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320
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321 ----------------------------
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322 -- POSIX.1c Section 13 --
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323 ----------------------------
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324
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325 function pthread_setschedparam
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326 (thread : pthread_t;
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327 policy : int;
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328 param : access struct_sched_param) return int
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329 is
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330 function pthread_setscheduler
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331 (thread : pthread_t;
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332 policy : int;
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333 priority : int) return int;
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334 pragma Import (C, pthread_setscheduler, "pthread_setscheduler");
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335
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336 begin
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337 if pthread_setscheduler (thread, policy, param.sched_priority) = -1 then
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338 return errno;
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339 else
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340 return 0;
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341 end if;
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342 end pthread_setschedparam;
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343
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344 function sched_yield return int is
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345 procedure pthread_yield;
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346 pragma Import (C, pthread_yield, "pthread_yield");
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347 begin
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348 pthread_yield;
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349 return 0;
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350 end sched_yield;
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351
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352 -----------------------------
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353 -- P1003.1c - Section 16 --
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354 -----------------------------
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355
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356 function pthread_attr_init
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357 (attributes : access pthread_attr_t) return int
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358 is
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359 function pthread_attr_create
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360 (attributes : access pthread_attr_t) return int;
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361 pragma Import (C, pthread_attr_create, "pthread_attr_create");
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362
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363 begin
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364 if pthread_attr_create (attributes) /= 0 then
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365 return errno;
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366 else
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367 return 0;
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368 end if;
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369 end pthread_attr_init;
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370
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371 function pthread_attr_destroy
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372 (attributes : access pthread_attr_t) return int
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373 is
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374 function pthread_attr_delete
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375 (attributes : access pthread_attr_t) return int;
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376 pragma Import (C, pthread_attr_delete, "pthread_attr_delete");
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377
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378 begin
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379 if pthread_attr_delete (attributes) /= 0 then
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380 return errno;
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381 else
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382 return 0;
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383 end if;
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384 end pthread_attr_destroy;
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385
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386 function pthread_attr_setstacksize
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387 (attr : access pthread_attr_t;
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388 stacksize : size_t) return int
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389 is
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390 function pthread_attr_setstacksize_base
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391 (attr : access pthread_attr_t;
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392 stacksize : size_t) return int;
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393 pragma Import (C, pthread_attr_setstacksize_base,
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394 "pthread_attr_setstacksize");
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395
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396 begin
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397 if pthread_attr_setstacksize_base (attr, stacksize) /= 0 then
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398 return errno;
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399 else
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400 return 0;
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401 end if;
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402 end pthread_attr_setstacksize;
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403
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404 function pthread_create
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405 (thread : access pthread_t;
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406 attributes : access pthread_attr_t;
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407 start_routine : Thread_Body;
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408 arg : System.Address) return int
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409 is
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410 function pthread_create_base
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411 (thread : access pthread_t;
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412 attributes : pthread_attr_t;
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413 start_routine : Thread_Body;
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414 arg : System.Address) return int;
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415 pragma Import (C, pthread_create_base, "pthread_create");
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416
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417 begin
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418 if pthread_create_base
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419 (thread, attributes.all, start_routine, arg) /= 0
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420 then
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421 return errno;
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422 else
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423 return 0;
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424 end if;
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425 end pthread_create;
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426
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427 --------------------------
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428 -- POSIX.1c Section 17 --
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429 --------------------------
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430
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431 function pthread_setspecific
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432 (key : pthread_key_t;
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433 value : System.Address) return int
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434 is
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435 function pthread_setspecific_base
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436 (key : pthread_key_t;
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437 value : System.Address) return int;
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438 pragma Import (C, pthread_setspecific_base, "pthread_setspecific");
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439
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440 begin
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441 if pthread_setspecific_base (key, value) /= 0 then
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442 return errno;
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443 else
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444 return 0;
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445 end if;
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446 end pthread_setspecific;
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447
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448 function pthread_getspecific (key : pthread_key_t) return System.Address is
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449 function pthread_getspecific_base
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450 (key : pthread_key_t;
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451 value : access System.Address) return int;
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452 pragma Import (C, pthread_getspecific_base, "pthread_getspecific");
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453 Addr : aliased System.Address;
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454
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455 begin
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456 if pthread_getspecific_base (key, Addr'Access) /= 0 then
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457 return System.Null_Address;
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458 else
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459 return Addr;
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460 end if;
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461 end pthread_getspecific;
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462
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463 function pthread_key_create
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464 (key : access pthread_key_t;
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465 destructor : destructor_pointer) return int
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466 is
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467 function pthread_keycreate
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468 (key : access pthread_key_t;
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469 destructor : destructor_pointer) return int;
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470 pragma Import (C, pthread_keycreate, "pthread_keycreate");
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471
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472 begin
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473 if pthread_keycreate (key, destructor) /= 0 then
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474 return errno;
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475 else
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476 return 0;
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477 end if;
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478 end pthread_key_create;
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479
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480 function Get_Stack_Base (thread : pthread_t) return Address is
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481 pragma Warnings (Off, thread);
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482 begin
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483 return Null_Address;
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484 end Get_Stack_Base;
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485
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486 procedure pthread_init is
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487 begin
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488 null;
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489 end pthread_init;
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490
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491 function intr_attach (sig : int; handler : isr_address) return long is
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492 function c_signal (sig : int; handler : isr_address) return long;
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493 pragma Import (C, c_signal, "signal");
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494 begin
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495 return c_signal (sig, handler);
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496 end intr_attach;
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497
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498 end System.OS_Interface;
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