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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 -- S p e c --
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8 -- --
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9 -- Copyright (C) 1995-2018, Free Software Foundation, Inc. --
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10 -- --
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11 -- GNAT is free software; you can redistribute it and/or modify it under --
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12 -- terms of the GNU General Public License as published by the Free Soft- --
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13 -- ware Foundation; either version 3, or (at your option) any later ver- --
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14 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
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15 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
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16 -- or FITNESS FOR A PARTICULAR PURPOSE. --
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17 -- --
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18 -- As a special exception under Section 7 of GPL version 3, you are granted --
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19 -- additional permissions described in the GCC Runtime Library Exception, --
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20 -- version 3.1, as published by the Free Software Foundation. --
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21 -- --
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22 -- You should have received a copy of the GNU General Public License and --
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23 -- a copy of the GCC Runtime Library Exception along with this program; --
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24 -- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
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25 -- <http://www.gnu.org/licenses/>. --
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26 -- --
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27 -- GNARL was developed by the GNARL team at Florida State University. --
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28 -- Extensive contributions were provided by Ada Core Technologies, Inc. --
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29 -- --
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30 ------------------------------------------------------------------------------
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31
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32 -- This is a QNX/Neutrino version of this package
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33
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34 -- This package encapsulates all direct interfaces to OS services
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35 -- that are needed by the tasking run-time (libgnarl).
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36
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37 -- PLEASE DO NOT add any with-clauses to this package or remove the pragma
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38 -- Preelaborate. This package is designed to be a bottom-level (leaf) package.
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39
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40 with Ada.Unchecked_Conversion;
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41 with Interfaces.C;
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42 with System.OS_Constants;
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43
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44 package System.OS_Interface is
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45 pragma Preelaborate;
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46
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47 subtype int is Interfaces.C.int;
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48 subtype char is Interfaces.C.char;
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49 subtype short is Interfaces.C.short;
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50 subtype long is Interfaces.C.long;
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51 subtype unsigned is Interfaces.C.unsigned;
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52 subtype unsigned_short is Interfaces.C.unsigned_short;
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53 subtype unsigned_long is Interfaces.C.unsigned_long;
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54 subtype unsigned_char is Interfaces.C.unsigned_char;
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55 subtype plain_char is Interfaces.C.plain_char;
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56 subtype size_t is Interfaces.C.size_t;
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57
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58 -----------
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59 -- Errno --
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60 -----------
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61
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62 function errno return int;
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63 pragma Import (C, errno, "__get_errno");
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64
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65 EPERM : constant := 1;
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66 EINTR : constant := 4;
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67 EAGAIN : constant := 11;
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68 ENOMEM : constant := 12;
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69 EINVAL : constant := 22;
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70 ETIMEDOUT : constant := 260;
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71
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72 -------------
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73 -- Signals --
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74 -------------
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75
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76 Max_Interrupt : constant := 64;
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77 type Signal is new int range 0 .. Max_Interrupt;
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78 for Signal'Size use int'Size;
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79
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80 SIGHUP : constant := 1;
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81 SIGINT : constant := 2;
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82 SIGQUIT : constant := 3;
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83 SIGILL : constant := 4;
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84 SIGTRAP : constant := 5;
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85 SIGIOT : constant := 6;
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86 SIGABRT : constant := 6;
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87 SIGDEADLK : constant := 7;
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88 SIGFPE : constant := 8;
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89 SIGKILL : constant := 9;
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90 SIGBUS : constant := 10;
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91 SIGSEGV : constant := 11;
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92 SIGSYS : constant := 12;
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93 SIGPIPE : constant := 13;
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94 SIGALRM : constant := 14;
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95 SIGTERM : constant := 15;
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96 SIGUSR1 : constant := 16;
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97 SIGUSR2 : constant := 17;
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98 SIGCLD : constant := 18;
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99 SIGCHLD : constant := 18;
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100 SIGPWR : constant := 19;
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101 SIGWINCH : constant := 20;
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102 SIGURG : constant := 21;
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103 SIGPOLL : constant := 22;
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104 SIGIO : constant := 22;
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105 SIGSTOP : constant := 23;
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106 SIGTSTP : constant := 24;
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107 SIGCONT : constant := 25;
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108 SIGTTIN : constant := 26;
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109 SIGTTOU : constant := 27;
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110 SIGVTALRM : constant := 28;
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111 SIGPROF : constant := 29;
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112 SIGXCPU : constant := 30;
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113 SIGXFSZ : constant := 31;
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114
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115 SIGRTMIN : constant := 41;
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116 SITRTMAX : constant := 56;
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117
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118 SIGSELECT : constant := 57;
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119 SIGPHOTON : constant := 58;
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120
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121 SIGADAABORT : constant := SIGABRT;
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122 -- Change this to use another signal for task abort. SIGTERM might be a
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123 -- good one.
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124
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125 type Signal_Set is array (Natural range <>) of Signal;
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126
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127 Unmasked : constant Signal_Set := (
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128 SIGTRAP,
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129 -- To enable debugging on multithreaded applications, mark SIGTRAP to
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130 -- be kept unmasked.
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131
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132 SIGBUS,
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133
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134 SIGTTIN, SIGTTOU, SIGTSTP,
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135 -- Keep these three signals unmasked so that background processes and IO
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136 -- behaves as normal "C" applications
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137
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138 SIGPROF,
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139 -- To avoid confusing the profiler
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140
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141 SIGKILL, SIGSTOP);
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142 -- These two signals actually can't be masked (POSIX won't allow it)
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143
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144 Reserved : constant Signal_Set := (SIGABRT, SIGKILL, SIGSTOP, SIGSEGV);
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145
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146 type sigset_t is private;
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147
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148 function sigaddset (set : access sigset_t; sig : Signal) return int;
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149 pragma Import (C, sigaddset, "sigaddset");
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150
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151 function sigdelset (set : access sigset_t; sig : Signal) return int;
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152 pragma Import (C, sigdelset, "sigdelset");
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153
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154 function sigfillset (set : access sigset_t) return int;
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155 pragma Import (C, sigfillset, "sigfillset");
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156
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157 function sigismember (set : access sigset_t; sig : Signal) return int;
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158 pragma Import (C, sigismember, "sigismember");
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159
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160 function sigemptyset (set : access sigset_t) return int;
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161 pragma Import (C, sigemptyset, "sigemptyset");
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162
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163 type pad7 is array (1 .. 7) of int;
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164 type siginfo_t is record
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165 si_signo : int;
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166 si_code : int;
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167 si_errno : int;
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168 X_data : pad7;
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169 end record;
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170 pragma Convention (C, siginfo_t);
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171
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172 type struct_sigaction is record
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173 sa_handler : System.Address;
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174 sa_flags : int;
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175 sa_mask : sigset_t;
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176 end record;
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177 pragma Convention (C, struct_sigaction);
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178
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179 type struct_sigaction_ptr is access all struct_sigaction;
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180
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181 SIG_BLOCK : constant := 0;
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182 SIG_UNBLOCK : constant := 1;
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183 SIG_SETMASK : constant := 2;
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184 SIG_PENDING : constant := 5;
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185
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186 SA_NOCLDSTOP : constant := 16#0001#;
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187 SA_SIGINFO : constant := 16#0002#;
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188 SA_RESETHAND : constant := 16#0004#;
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189 SA_ONSTACK : constant := 16#0008#;
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190 SA_NODEFER : constant := 16#0010#;
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191 SA_NOCLDWAIT : constant := 16#0020#;
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192
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193 SS_ONSTACK : constant := 1;
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194 SS_DISABLE : constant := 2;
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195
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196 SIG_DFL : constant := 0;
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197 SIG_IGN : constant := 1;
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198
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199 function sigaction
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200 (sig : Signal;
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201 act : struct_sigaction_ptr;
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202 oact : struct_sigaction_ptr) return int;
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203 pragma Import (C, sigaction, "sigaction");
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204
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205 ----------
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206 -- Time --
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207 ----------
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208
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209 Time_Slice_Supported : constant Boolean := True;
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210 -- Indicates whether time slicing is supported
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211
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212 type timespec is private;
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213
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214 type clockid_t is new int;
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215
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216 function clock_gettime
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217 (clock_id : clockid_t; tp : access timespec) return int;
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218 pragma Import (C, clock_gettime, "clock_gettime");
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219
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220 function clock_getres
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221 (clock_id : clockid_t;
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222 res : access timespec) return int;
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223 pragma Import (C, clock_getres, "clock_getres");
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224
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225 function To_Duration (TS : timespec) return Duration;
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226 pragma Inline (To_Duration);
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227
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228 function To_Timespec (D : Duration) return timespec;
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229 pragma Inline (To_Timespec);
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230
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231 -------------------------
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232 -- Priority Scheduling --
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233 -------------------------
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234
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235 SCHED_FIFO : constant := 1;
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236 SCHED_RR : constant := 2;
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237 SCHED_OTHER : constant := 3;
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238
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239 function To_Target_Priority
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240 (Prio : System.Any_Priority) return Interfaces.C.int
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241 with Inline_Always;
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242 -- Maps System.Any_Priority to a POSIX priority
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243
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244 -------------
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245 -- Process --
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246 -------------
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247
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248 type pid_t is private;
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249
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250 function kill (pid : pid_t; sig : Signal) return int;
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251 pragma Import (C, kill, "kill");
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252
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253 function getpid return pid_t;
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254 pragma Import (C, getpid, "getpid");
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255
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256 -------------
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257 -- Threads --
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258 -------------
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259
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260 type Thread_Body is access
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261 function (arg : System.Address) return System.Address;
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262 pragma Convention (C, Thread_Body);
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263
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264 function Thread_Body_Access is new
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265 Ada.Unchecked_Conversion (System.Address, Thread_Body);
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266
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267 type pthread_t is new int;
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268 subtype Thread_Id is pthread_t;
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269
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270 type pthread_mutex_t is limited private;
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271 type pthread_cond_t is limited private;
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272 type pthread_attr_t is limited private;
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273 type pthread_mutexattr_t is limited private;
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274 type pthread_condattr_t is limited private;
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275 type pthread_key_t is private;
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276
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277 PTHREAD_CREATE_DETACHED : constant := 1;
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278
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279 PTHREAD_SCOPE_PROCESS : constant := 4;
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280 PTHREAD_SCOPE_SYSTEM : constant := 0;
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281
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282 PTHREAD_INHERIT_SCHED : constant := 0;
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283 PTHREAD_EXPLICIT_SCHED : constant := 2;
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284
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285 -- Read/Write lock not supported on Android.
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286
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287 subtype pthread_rwlock_t is pthread_mutex_t;
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288 subtype pthread_rwlockattr_t is pthread_mutexattr_t;
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289
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290 -----------
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291 -- Stack --
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292 -----------
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293
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294 type stack_t is record
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295 ss_sp : System.Address;
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296 ss_flags : int;
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297 ss_size : size_t;
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298 end record;
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299 pragma Convention (C, stack_t);
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300
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301 function sigaltstack
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302 (ss : not null access stack_t;
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303 oss : access stack_t) return int
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304 with Inline;
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305 -- Not supported on QNX
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306
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307 Alternate_Stack : aliased System.Address;
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308 -- Dummy definition: alternate stack not available due to missing
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309 -- sigaltstack in QNX
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310
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311 Alternate_Stack_Size : constant := 0;
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312 -- This must be kept in sync with init.c:__gnat_alternate_stack
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313
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314 Stack_Base_Available : constant Boolean := False;
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315 -- Indicates whether the stack base is available on this target
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316
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317 function Get_Stack_Base (thread : pthread_t) return System.Address
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318 with Inline;
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319 -- This is a dummy procedure to share some GNULLI files
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320
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321 function Get_Page_Size return int;
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322 pragma Import (C, Get_Page_Size, "getpagesize");
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323 -- Returns the size of a page
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324
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325 PROT_NONE : constant := 16#00_00#;
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326 PROT_READ : constant := 16#01_00#;
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327 PROT_WRITE : constant := 16#02_00#;
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328 PROT_EXEC : constant := 16#04_00#;
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329 PROT_ALL : constant := PROT_READ + PROT_WRITE + PROT_EXEC;
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330 PROT_ON : constant := PROT_READ;
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331 PROT_OFF : constant := PROT_ALL;
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332
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333 function mprotect (addr : Address; len : size_t; prot : int) return int;
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334 pragma Import (C, mprotect);
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335
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336 ---------------------------------------
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337 -- Nonstandard Thread Initialization --
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338 ---------------------------------------
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339
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340 procedure pthread_init with Inline_Always;
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341
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342 -------------------------
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343 -- POSIX.1c Section 3 --
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344 -------------------------
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345
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346 function sigwait (set : access sigset_t; sig : access Signal) return int;
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347 pragma Import (C, sigwait, "sigwait");
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348
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349 function pthread_kill (thread : pthread_t; sig : Signal) return int;
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350 pragma Import (C, pthread_kill, "pthread_kill");
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351
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352 function pthread_sigmask
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353 (how : int;
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354 set : access sigset_t;
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355 oset : access sigset_t) return int;
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356 pragma Import (C, pthread_sigmask, "pthread_sigmask");
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357
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358 --------------------------
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359 -- POSIX.1c Section 11 --
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360 --------------------------
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361
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362 function pthread_mutexattr_init
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363 (attr : access pthread_mutexattr_t) return int;
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364 pragma Import (C, pthread_mutexattr_init, "pthread_mutexattr_init");
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365
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366 function pthread_mutexattr_destroy
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367 (attr : access pthread_mutexattr_t) return int;
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368 pragma Import (C, pthread_mutexattr_destroy, "pthread_mutexattr_destroy");
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369
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370 function pthread_mutex_init
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371 (mutex : access pthread_mutex_t;
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372 attr : access pthread_mutexattr_t) return int;
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373 pragma Import (C, pthread_mutex_init, "pthread_mutex_init");
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374
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375 function pthread_mutex_destroy (mutex : access pthread_mutex_t) return int;
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376 pragma Import (C, pthread_mutex_destroy, "pthread_mutex_destroy");
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377
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378 function pthread_mutex_lock (mutex : access pthread_mutex_t) return int;
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379 pragma Import (C, pthread_mutex_lock, "pthread_mutex_lock");
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380
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381 function pthread_mutex_unlock (mutex : access pthread_mutex_t) return int;
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382 pragma Import (C, pthread_mutex_unlock, "pthread_mutex_unlock");
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383
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384 function pthread_mutex_setprioceiling
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385 (mutex : access pthread_mutex_t;
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386 prioceiling : int;
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387 old_ceiling : access int) return int;
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388 pragma Import (C, pthread_mutex_setprioceiling);
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389
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390 function pthread_condattr_init
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391 (attr : access pthread_condattr_t) return int;
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392 pragma Import (C, pthread_condattr_init, "pthread_condattr_init");
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393
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394 function pthread_condattr_destroy
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395 (attr : access pthread_condattr_t) return int;
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396 pragma Import (C, pthread_condattr_destroy, "pthread_condattr_destroy");
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397
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398 function pthread_cond_init
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399 (cond : access pthread_cond_t;
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400 attr : access pthread_condattr_t) return int;
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401 pragma Import (C, pthread_cond_init, "pthread_cond_init");
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402
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403 function pthread_cond_destroy (cond : access pthread_cond_t) return int;
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404 pragma Import (C, pthread_cond_destroy, "pthread_cond_destroy");
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405
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406 function pthread_cond_signal (cond : access pthread_cond_t) return int;
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407 pragma Import (C, pthread_cond_signal, "pthread_cond_signal");
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408
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409 function pthread_cond_wait
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410 (cond : access pthread_cond_t;
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411 mutex : access pthread_mutex_t) return int;
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412 pragma Import (C, pthread_cond_wait, "pthread_cond_wait");
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413
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414 function pthread_cond_timedwait
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415 (cond : access pthread_cond_t;
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416 mutex : access pthread_mutex_t;
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417 abstime : access timespec) return int;
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418 pragma Import (C, pthread_cond_timedwait, "pthread_cond_timedwait");
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419
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420 --------------------------
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421 -- POSIX.1c Section 13 --
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422 --------------------------
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423
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424 PTHREAD_PRIO_INHERIT : constant := 0;
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425 PTHREAD_PRIO_NONE : constant := 1;
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426 PTHREAD_PRIO_PROTECT : constant := 2;
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427
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428 function pthread_mutexattr_setprotocol
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429 (attr : access pthread_mutexattr_t;
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430 protocol : int) return int;
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431 pragma Import (C, pthread_mutexattr_setprotocol);
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432
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433 function pthread_mutexattr_getprotocol
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434 (attr : access pthread_mutexattr_t;
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435 protocol : access int) return int;
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436 pragma Import (C, pthread_mutexattr_getprotocol);
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437
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438 function pthread_mutexattr_setprioceiling
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439 (attr : access pthread_mutexattr_t;
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440 prioceiling : int) return int;
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441 pragma Import (C, pthread_mutexattr_setprioceiling);
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442
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443 function pthread_mutexattr_getprioceiling
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444 (attr : access pthread_mutexattr_t;
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445 prioceiling : access int) return int;
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446 pragma Import (C, pthread_mutexattr_getprioceiling);
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447
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448 function pthread_mutex_getprioceiling
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449 (attr : access pthread_mutex_t;
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450 prioceiling : access int) return int;
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451 pragma Import (C, pthread_mutex_getprioceiling);
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452
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453 type pad8 is array (1 .. 8) of int;
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454 pragma Convention (C, pad8);
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455
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456 type struct_sched_param is record
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457 sched_priority : int := 0; -- scheduling priority
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458 sched_curpriority : int := 0;
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459 reserved : pad8 := (others => 0);
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460 end record;
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461 pragma Convention (C, struct_sched_param);
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462
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463 function pthread_setschedparam
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464 (thread : pthread_t;
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465 policy : int;
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466 param : access struct_sched_param) return int;
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467 pragma Import (C, pthread_setschedparam, "pthread_setschedparam");
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468
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469 function pthread_getschedparam
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470 (thread : pthread_t;
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471 policy : access int;
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472 param : access struct_sched_param) return int;
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473 pragma Import (C, pthread_getschedparam, "pthread_getschedparam");
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474
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475 function pthread_setschedprio
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476 (thread : pthread_t;
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477 priority : int) return int;
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478 pragma Import (C, pthread_setschedprio);
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479
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480 function pthread_attr_setschedparam
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481 (attr : access pthread_attr_t;
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482 param : access struct_sched_param) return int;
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483 pragma Import (C, pthread_attr_setschedparam);
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484
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485 function pthread_attr_setinheritsched
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486 (attr : access pthread_attr_t;
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487 inheritsched : int) return int;
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488 pragma Import (C, pthread_attr_setinheritsched);
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489
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490 function pthread_attr_setscope
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491 (attr : access pthread_attr_t;
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492 scope : int) return int;
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493 pragma Import (C, pthread_attr_setscope, "pthread_attr_setscope");
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494
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495 function pthread_attr_setschedpolicy
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496 (attr : access pthread_attr_t;
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497 policy : int) return int;
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498 pragma Import
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499 (C, pthread_attr_setschedpolicy, "pthread_attr_setschedpolicy");
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500
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501 function sched_yield return int;
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502 pragma Import (C, sched_yield, "sched_yield");
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503
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504 ---------------------------
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505 -- P1003.1c - Section 16 --
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506 ---------------------------
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507
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508 function pthread_attr_init
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509 (attributes : access pthread_attr_t) return int;
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510 pragma Import (C, pthread_attr_init, "pthread_attr_init");
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511
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512 function pthread_attr_destroy
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513 (attributes : access pthread_attr_t) return int;
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514 pragma Import (C, pthread_attr_destroy, "pthread_attr_destroy");
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515
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516 function pthread_attr_setdetachstate
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517 (attr : access pthread_attr_t;
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518 detachstate : int) return int;
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|
519 pragma Import (C, pthread_attr_setdetachstate);
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520
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521 function pthread_attr_setstacksize
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522 (attr : access pthread_attr_t;
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523 stacksize : size_t) return int;
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524 pragma Import (C, pthread_attr_setstacksize);
|
|
|
525
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526 function pthread_create
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527 (thread : access pthread_t;
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528 attributes : access pthread_attr_t;
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529 start_routine : Thread_Body;
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|
530 arg : System.Address) return int;
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531 pragma Import (C, pthread_create, "pthread_create");
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532
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533 procedure pthread_exit (status : System.Address);
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534 pragma Import (C, pthread_exit, "pthread_exit");
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535
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536 function pthread_self return pthread_t;
|
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537 pragma Import (C, pthread_self, "pthread_self");
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|
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538
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|
|
539 function lwp_self return System.Address;
|
|
|
540 pragma Import (C, lwp_self, "pthread_self");
|
|
|
541
|
|
|
542 --------------------------
|
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|
543 -- POSIX.1c Section 17 --
|
|
|
544 --------------------------
|
|
|
545
|
|
|
546 function pthread_setspecific
|
|
|
547 (key : pthread_key_t;
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548 value : System.Address) return int;
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549 pragma Import (C, pthread_setspecific, "pthread_setspecific");
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550
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551 function pthread_getspecific (key : pthread_key_t) return System.Address;
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|
|
552 pragma Import (C, pthread_getspecific, "pthread_getspecific");
|
|
|
553
|
|
|
554 type destructor_pointer is access procedure (arg : System.Address);
|
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|
555 pragma Convention (C, destructor_pointer);
|
|
|
556
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|
|
557 function pthread_key_create
|
|
|
558 (key : access pthread_key_t;
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|
|
559 destructor : destructor_pointer) return int;
|
|
|
560 pragma Import (C, pthread_key_create, "pthread_key_create");
|
|
|
561
|
|
|
562 private
|
|
|
563
|
|
|
564 type sigset_t is array (1 .. 2) of Interfaces.Unsigned_32;
|
|
|
565 pragma Convention (C, sigset_t);
|
|
|
566
|
|
|
567 type pid_t is new int;
|
|
|
568
|
|
|
569 type time_t is new long;
|
|
|
570
|
|
|
571 type timespec is record
|
|
|
572 tv_sec : time_t;
|
|
|
573 tv_nsec : long;
|
|
|
574 end record;
|
|
|
575 pragma Convention (C, timespec);
|
|
|
576
|
|
|
577 type unsigned_long_long_t is mod 2 ** 64;
|
|
|
578 -- Local type only used to get the alignment of this type below
|
|
|
579
|
|
|
580 subtype char_array is Interfaces.C.char_array;
|
|
|
581
|
|
|
582 type pthread_attr_t is record
|
|
|
583 Data : char_array (1 .. OS_Constants.PTHREAD_ATTR_SIZE);
|
|
|
584 end record;
|
|
|
585 pragma Convention (C, pthread_attr_t);
|
|
|
586 for pthread_attr_t'Alignment use Interfaces.C.unsigned_long'Alignment;
|
|
|
587
|
|
|
588 type pthread_condattr_t is record
|
|
|
589 Data : char_array (1 .. OS_Constants.PTHREAD_CONDATTR_SIZE);
|
|
|
590 end record;
|
|
|
591 pragma Convention (C, pthread_condattr_t);
|
|
|
592 for pthread_condattr_t'Alignment use Interfaces.C.int'Alignment;
|
|
|
593
|
|
|
594 type pthread_mutexattr_t is record
|
|
|
595 Data : char_array (1 .. OS_Constants.PTHREAD_MUTEXATTR_SIZE);
|
|
|
596 end record;
|
|
|
597 pragma Convention (C, pthread_mutexattr_t);
|
|
|
598 for pthread_mutexattr_t'Alignment use Interfaces.C.int'Alignment;
|
|
|
599
|
|
|
600 type pthread_mutex_t is record
|
|
|
601 Data : char_array (1 .. OS_Constants.PTHREAD_MUTEX_SIZE);
|
|
|
602 end record;
|
|
|
603 pragma Convention (C, pthread_mutex_t);
|
|
|
604 for pthread_mutex_t'Alignment use Interfaces.C.unsigned_long'Alignment;
|
|
|
605
|
|
|
606 type pthread_cond_t is record
|
|
|
607 Data : char_array (1 .. OS_Constants.PTHREAD_COND_SIZE);
|
|
|
608 end record;
|
|
|
609 pragma Convention (C, pthread_cond_t);
|
|
|
610 for pthread_cond_t'Alignment use unsigned_long_long_t'Alignment;
|
|
|
611
|
|
|
612 type pthread_key_t is new int;
|
|
|
613
|
|
|
614 end System.OS_Interface;
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