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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) 1991-2017, Florida State University --
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131
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10 -- Copyright (C) 1995-2018, Free Software Foundation, Inc. --
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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 HPUX 11.0 (Native THREADS) version of this package
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34
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35 -- This package encapsulates all direct interfaces to OS services that are
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36 -- needed by the tasking run-time (libgnarl).
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37
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38 -- PLEASE DO NOT add any with-clauses to this package or remove the pragma
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39 -- Preelaborate. This package is designed to be a bottom-level (leaf) package.
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40
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41 with Ada.Unchecked_Conversion;
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42
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43 with Interfaces.C;
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44
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45 package System.OS_Interface is
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46 pragma Preelaborate;
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47
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48 pragma Linker_Options ("-lpthread");
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49
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50 subtype int is Interfaces.C.int;
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51 subtype short is Interfaces.C.short;
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52 subtype long is Interfaces.C.long;
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53 subtype unsigned is Interfaces.C.unsigned;
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54 subtype unsigned_short is Interfaces.C.unsigned_short;
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55 subtype unsigned_long is Interfaces.C.unsigned_long;
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56 subtype unsigned_char is Interfaces.C.unsigned_char;
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57 subtype plain_char is Interfaces.C.plain_char;
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58 subtype size_t is Interfaces.C.size_t;
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59
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60 -----------
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61 -- Errno --
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62 -----------
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63
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64 function errno return int;
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65 pragma Import (C, errno, "__get_errno");
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66
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67 EAGAIN : constant := 11;
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68 EINTR : constant := 4;
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69 EINVAL : constant := 22;
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70 ENOMEM : constant := 12;
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71 ETIMEDOUT : constant := 238;
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72
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73 -------------
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74 -- Signals --
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75 -------------
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76
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77 Max_Interrupt : constant := 44;
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78 type Signal is new int range 0 .. Max_Interrupt;
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79 for Signal'Size use int'Size;
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80
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81 SIGHUP : constant := 1; -- hangup
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82 SIGINT : constant := 2; -- interrupt (rubout)
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83 SIGQUIT : constant := 3; -- quit (ASCD FS)
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84 SIGILL : constant := 4; -- illegal instruction (not reset)
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85 SIGTRAP : constant := 5; -- trace trap (not reset)
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86 SIGIOT : constant := 6; -- IOT instruction
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87 SIGABRT : constant := 6; -- used by abort, replace SIGIOT in the future
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88 SIGEMT : constant := 7; -- EMT instruction
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89 SIGFPE : constant := 8; -- floating point exception
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90 SIGKILL : constant := 9; -- kill (cannot be caught or ignored)
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91 SIGBUS : constant := 10; -- bus error
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92 SIGSEGV : constant := 11; -- segmentation violation
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93 SIGSYS : constant := 12; -- bad argument to system call
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94 SIGPIPE : constant := 13; -- write on a pipe with no one to read it
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95 SIGALRM : constant := 14; -- alarm clock
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96 SIGTERM : constant := 15; -- software termination signal from kill
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97 SIGUSR1 : constant := 16; -- user defined signal 1
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98 SIGUSR2 : constant := 17; -- user defined signal 2
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99 SIGCLD : constant := 18; -- alias for SIGCHLD
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100 SIGCHLD : constant := 18; -- child status change
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101 SIGPWR : constant := 19; -- power-fail restart
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102 SIGVTALRM : constant := 20; -- virtual timer alarm
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103 SIGPROF : constant := 21; -- profiling timer alarm
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104 SIGIO : constant := 22; -- asynchronous I/O
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105 SIGPOLL : constant := 22; -- pollable event occurred
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106 SIGWINCH : constant := 23; -- window size change
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107 SIGSTOP : constant := 24; -- stop (cannot be caught or ignored)
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108 SIGTSTP : constant := 25; -- user stop requested from tty
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109 SIGCONT : constant := 26; -- stopped process has been continued
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110 SIGTTIN : constant := 27; -- background tty read attempted
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111 SIGTTOU : constant := 28; -- background tty write attempted
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112 SIGURG : constant := 29; -- urgent condition on IO channel
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113 SIGLOST : constant := 30; -- remote lock lost (NFS)
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114 SIGDIL : constant := 32; -- DIL signal
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115 SIGXCPU : constant := 33; -- CPU time limit exceeded (setrlimit)
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116 SIGXFSZ : constant := 34; -- file size limit exceeded (setrlimit)
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117 SIGCANCEL : constant := 35; -- used for pthread cancellation.
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118 SIGGFAULT : constant := 36; -- Graphics framebuffer fault
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119
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120 SIGADAABORT : constant := SIGABRT;
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121 -- Note: on other targets, we usually use SIGABRT, but on HPUX, it
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122 -- appears that SIGABRT can't be used in sigwait(), so we use SIGTERM.
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123 -- Do we use SIGTERM or SIGABRT???
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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 (SIGABRT, SIGPIPE, SIGBUS, SIGTRAP, SIGTTIN, SIGTTOU, SIGTSTP, SIGPROF,
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129 SIGALRM, SIGVTALRM, SIGIO, SIGCHLD);
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130
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131 Reserved : constant Signal_Set := (SIGKILL, SIGSTOP);
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132
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133 type sigset_t is private;
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134
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135 function sigaddset (set : access sigset_t; sig : Signal) return int;
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136 pragma Import (C, sigaddset, "sigaddset");
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137
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138 function sigdelset (set : access sigset_t; sig : Signal) return int;
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139 pragma Import (C, sigdelset, "sigdelset");
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140
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141 function sigfillset (set : access sigset_t) return int;
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142 pragma Import (C, sigfillset, "sigfillset");
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143
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144 function sigismember (set : access sigset_t; sig : Signal) return int;
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145 pragma Import (C, sigismember, "sigismember");
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146
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147 function sigemptyset (set : access sigset_t) return int;
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148 pragma Import (C, sigemptyset, "sigemptyset");
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149
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150 type struct_sigaction is record
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151 sa_handler : System.Address;
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152 sa_mask : sigset_t;
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153 sa_flags : int;
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154 end record;
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155 pragma Convention (C, struct_sigaction);
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156 type struct_sigaction_ptr is access all struct_sigaction;
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157
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158 SA_SIGINFO : constant := 16#10#;
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159 SA_ONSTACK : constant := 16#01#;
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160
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161 SIG_BLOCK : constant := 0;
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162 SIG_UNBLOCK : constant := 1;
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163 SIG_SETMASK : constant := 2;
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164
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165 SIG_DFL : constant := 0;
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166 SIG_IGN : constant := 1;
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167
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168 function sigaction
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169 (sig : Signal;
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170 act : struct_sigaction_ptr;
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171 oact : struct_sigaction_ptr) return int;
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172 pragma Import (C, sigaction, "sigaction");
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173
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174 ----------
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175 -- Time --
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176 ----------
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177
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178 Time_Slice_Supported : constant Boolean := True;
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179 -- Indicates whether time slicing is supported
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180
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181 type timespec is private;
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182
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183 type clockid_t is new int;
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184
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185 function clock_gettime
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186 (clock_id : clockid_t;
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187 tp : access timespec) return int;
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188 pragma Import (C, clock_gettime, "clock_gettime");
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189
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190 function clock_getres
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191 (clock_id : clockid_t;
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192 res : access timespec) return int;
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193 pragma Import (C, clock_getres, "clock_getres");
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194
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195 function To_Duration (TS : timespec) return Duration;
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196 pragma Inline (To_Duration);
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197
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198 function To_Timespec (D : Duration) return timespec;
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199 pragma Inline (To_Timespec);
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200
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201 type struct_timezone is record
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202 tz_minuteswest : int;
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203 tz_dsttime : int;
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204 end record;
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205 pragma Convention (C, struct_timezone);
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206 type struct_timezone_ptr is access all struct_timezone;
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207
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208 -------------------------
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209 -- Priority Scheduling --
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210 -------------------------
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211
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212 SCHED_FIFO : constant := 0;
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213 SCHED_RR : constant := 1;
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214 SCHED_OTHER : constant := 2;
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215
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216 function To_Target_Priority
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217 (Prio : System.Any_Priority) return Interfaces.C.int;
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218 -- Maps System.Any_Priority to a POSIX priority
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219
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220 -------------
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221 -- Process --
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222 -------------
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223
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224 type pid_t is private;
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225
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226 function kill (pid : pid_t; sig : Signal) return int;
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227 pragma Import (C, kill, "kill");
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228
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229 function getpid return pid_t;
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230 pragma Import (C, getpid, "getpid");
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231
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232 ---------
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233 -- LWP --
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234 ---------
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235
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236 function lwp_self return System.Address;
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237 pragma Import (C, lwp_self, "_lwp_self");
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238
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239 -------------
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240 -- Threads --
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241 -------------
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242
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243 type Thread_Body is access
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244 function (arg : System.Address) return System.Address;
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245 pragma Convention (C, Thread_Body);
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246
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247 function Thread_Body_Access is new
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248 Ada.Unchecked_Conversion (System.Address, Thread_Body);
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249
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250 type pthread_t is private;
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251 subtype Thread_Id is pthread_t;
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252
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253 type pthread_mutex_t is limited private;
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254 type pthread_cond_t is limited private;
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255 type pthread_attr_t is limited private;
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256 type pthread_mutexattr_t is limited private;
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257 type pthread_condattr_t is limited private;
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258 type pthread_key_t is private;
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259
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260 PTHREAD_CREATE_DETACHED : constant := 16#de#;
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261
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262 PTHREAD_SCOPE_PROCESS : constant := 2;
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263 PTHREAD_SCOPE_SYSTEM : constant := 1;
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264
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265 -- Read/Write lock not supported on HPUX. To add support both types
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266 -- pthread_rwlock_t and pthread_rwlockattr_t must properly be defined
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267 -- with the associated routines pthread_rwlock_[init/destroy] and
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268 -- pthread_rwlock_[rdlock/wrlock/unlock].
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269
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270 subtype pthread_rwlock_t is pthread_mutex_t;
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271 subtype pthread_rwlockattr_t is pthread_mutexattr_t;
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272
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273 -----------
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274 -- Stack --
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275 -----------
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276
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277 type stack_t is record
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278 ss_sp : System.Address;
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279 ss_flags : int;
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280 ss_size : size_t;
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281 end record;
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282 pragma Convention (C, stack_t);
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283
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284 function sigaltstack
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285 (ss : not null access stack_t;
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286 oss : access stack_t) return int;
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287 pragma Import (C, sigaltstack, "sigaltstack");
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288
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289 Alternate_Stack : aliased System.Address;
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290 pragma Import (C, Alternate_Stack, "__gnat_alternate_stack");
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291 -- The alternate signal stack for stack overflows
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292
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293 Alternate_Stack_Size : constant := 128 * 1024;
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294 -- This must be in keeping with init.c:__gnat_alternate_stack
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295
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296 Stack_Base_Available : constant Boolean := False;
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297 -- Indicates whether the stack base is available on this target
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298
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299 function Get_Stack_Base (thread : pthread_t) return Address;
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300 pragma Inline (Get_Stack_Base);
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301 -- Returns the stack base of the specified thread. Only call this function
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302 -- when Stack_Base_Available is True.
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303
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304 function Get_Page_Size return int;
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305 pragma Import (C, Get_Page_Size, "getpagesize");
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306 -- Returns the size of a page
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307
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308 PROT_NONE : constant := 0;
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309 PROT_READ : constant := 1;
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310 PROT_WRITE : constant := 2;
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311 PROT_EXEC : constant := 4;
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312 PROT_ALL : constant := PROT_READ + PROT_WRITE + PROT_EXEC;
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313 PROT_ON : constant := PROT_READ;
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314 PROT_OFF : constant := PROT_ALL;
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315
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316 function mprotect (addr : Address; len : size_t; prot : int) return int;
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317 pragma Import (C, mprotect);
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318
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319 ---------------------------------------
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320 -- Nonstandard Thread Initialization --
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321 ---------------------------------------
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322
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323 procedure pthread_init;
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324 pragma Inline (pthread_init);
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325 -- This is a dummy procedure to share some GNULLI files
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326
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327 -------------------------
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328 -- POSIX.1c Section 3 --
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329 -------------------------
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330
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331 function sigwait
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332 (set : access sigset_t;
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333 sig : access Signal) return int;
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334 pragma Import (C, sigwait, "sigwait");
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335
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336 function pthread_kill
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337 (thread : pthread_t;
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338 sig : Signal) return int;
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339 pragma Import (C, pthread_kill, "pthread_kill");
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340
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341 function pthread_sigmask
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342 (how : int;
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343 set : access sigset_t;
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344 oset : access sigset_t) return int;
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345 pragma Import (C, pthread_sigmask, "pthread_sigmask");
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346
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347 --------------------------
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348 -- POSIX.1c Section 11 --
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349 --------------------------
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350
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351 function pthread_mutexattr_init
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352 (attr : access pthread_mutexattr_t) return int;
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353 pragma Import (C, pthread_mutexattr_init, "pthread_mutexattr_init");
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354
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355 function pthread_mutexattr_destroy
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356 (attr : access pthread_mutexattr_t) return int;
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357 pragma Import (C, pthread_mutexattr_destroy, "pthread_mutexattr_destroy");
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358
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359 function pthread_mutex_init
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360 (mutex : access pthread_mutex_t;
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361 attr : access pthread_mutexattr_t) return int;
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362 pragma Import (C, pthread_mutex_init, "pthread_mutex_init");
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363
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364 function pthread_mutex_destroy (mutex : access pthread_mutex_t) return int;
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365 pragma Import (C, pthread_mutex_destroy, "pthread_mutex_destroy");
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366
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367 function pthread_mutex_lock (mutex : access pthread_mutex_t) return int;
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368 pragma Import (C, pthread_mutex_lock, "pthread_mutex_lock");
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369
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370 function pthread_mutex_unlock (mutex : access pthread_mutex_t) return int;
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371 pragma Import (C, pthread_mutex_unlock, "pthread_mutex_unlock");
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372
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373 function pthread_condattr_init
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374 (attr : access pthread_condattr_t) return int;
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375 pragma Import (C, pthread_condattr_init, "pthread_condattr_init");
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376
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377 function pthread_condattr_destroy
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378 (attr : access pthread_condattr_t) return int;
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379 pragma Import (C, pthread_condattr_destroy, "pthread_condattr_destroy");
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380
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381 function pthread_cond_init
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382 (cond : access pthread_cond_t;
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383 attr : access pthread_condattr_t) return int;
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384 pragma Import (C, pthread_cond_init, "pthread_cond_init");
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385
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386 function pthread_cond_destroy (cond : access pthread_cond_t) return int;
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387 pragma Import (C, pthread_cond_destroy, "pthread_cond_destroy");
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388
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389 function pthread_cond_signal (cond : access pthread_cond_t) return int;
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390 pragma Import (C, pthread_cond_signal, "pthread_cond_signal");
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391
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392 function pthread_cond_wait
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393 (cond : access pthread_cond_t;
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394 mutex : access pthread_mutex_t) return int;
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395 pragma Import (C, pthread_cond_wait, "pthread_cond_wait");
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396
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397 function pthread_cond_timedwait
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398 (cond : access pthread_cond_t;
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399 mutex : access pthread_mutex_t;
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400 abstime : access timespec) return int;
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401 pragma Import (C, pthread_cond_timedwait, "pthread_cond_timedwait");
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402
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403 --------------------------
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404 -- POSIX.1c Section 13 --
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405 --------------------------
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406
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407 PTHREAD_PRIO_NONE : constant := 16#100#;
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408 PTHREAD_PRIO_PROTECT : constant := 16#200#;
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409 PTHREAD_PRIO_INHERIT : constant := 16#400#;
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410
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411 function pthread_mutexattr_setprotocol
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412 (attr : access pthread_mutexattr_t;
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413 protocol : int) return int;
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414 pragma Import (C, pthread_mutexattr_setprotocol);
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415
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416 function pthread_mutexattr_setprioceiling
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417 (attr : access pthread_mutexattr_t;
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418 prioceiling : int) return int;
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419 pragma Import (C, pthread_mutexattr_setprioceiling);
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420
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421 type Array_7_Int is array (0 .. 6) of int;
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422 type struct_sched_param is record
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423 sched_priority : int;
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424 sched_reserved : Array_7_Int;
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425 end record;
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426
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427 function pthread_setschedparam
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428 (thread : pthread_t;
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429 policy : int;
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430 param : access struct_sched_param)
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431 return int;
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432 pragma Import (C, pthread_setschedparam, "pthread_setschedparam");
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433
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434 function pthread_attr_setscope
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435 (attr : access pthread_attr_t;
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436 contentionscope : int) return int;
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437 pragma Import (C, pthread_attr_setscope, "pthread_attr_setscope");
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438
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439 function pthread_attr_setinheritsched
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440 (attr : access pthread_attr_t;
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441 inheritsched : int) return int;
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442 pragma Import (C, pthread_attr_setinheritsched);
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443
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444 function pthread_attr_setschedpolicy
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445 (attr : access pthread_attr_t;
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446 policy : int) return int;
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447 pragma Import (C, pthread_attr_setschedpolicy);
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448
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449 function sched_yield return int;
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450 pragma Import (C, sched_yield, "sched_yield");
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451
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452 --------------------------
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453 -- P1003.1c Section 16 --
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454 --------------------------
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455
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456 function pthread_attr_init
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457 (attributes : access pthread_attr_t) return int;
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458 pragma Import (C, pthread_attr_init, "__pthread_attr_init_system");
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459
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460 function pthread_attr_destroy
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461 (attributes : access pthread_attr_t) return int;
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462 pragma Import (C, pthread_attr_destroy, "pthread_attr_destroy");
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463
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464 function pthread_attr_setdetachstate
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465 (attr : access pthread_attr_t;
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466 detachstate : int) return int;
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467 pragma Import (C, pthread_attr_setdetachstate);
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468
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469 function pthread_attr_setstacksize
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470 (attr : access pthread_attr_t;
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471 stacksize : size_t) return int;
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472 pragma Import (C, pthread_attr_setstacksize, "pthread_attr_setstacksize");
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473
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474 function pthread_create
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475 (thread : access pthread_t;
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476 attributes : access pthread_attr_t;
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477 start_routine : Thread_Body;
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478 arg : System.Address) return int;
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479 pragma Import (C, pthread_create, "__pthread_create_system");
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480
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481 procedure pthread_exit (status : System.Address);
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482 pragma Import (C, pthread_exit, "pthread_exit");
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483
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484 function pthread_self return pthread_t;
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485 pragma Import (C, pthread_self, "pthread_self");
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486
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487 --------------------------
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488 -- POSIX.1c Section 17 --
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489 --------------------------
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490
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491 function pthread_setspecific
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492 (key : pthread_key_t;
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493 value : System.Address) return int;
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494 pragma Import (C, pthread_setspecific, "pthread_setspecific");
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495
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496 function pthread_getspecific (key : pthread_key_t) return System.Address;
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497 pragma Import (C, pthread_getspecific, "pthread_getspecific");
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498
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499 type destructor_pointer is access procedure (arg : System.Address);
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500 pragma Convention (C, destructor_pointer);
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501
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502 function pthread_key_create
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503 (key : access pthread_key_t;
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504 destructor : destructor_pointer) return int;
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505 pragma Import (C, pthread_key_create, "pthread_key_create");
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506
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507 private
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508
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509 type unsigned_int_array_8 is array (0 .. 7) of unsigned;
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510 type sigset_t is record
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511 sigset : unsigned_int_array_8;
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512 end record;
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513 pragma Convention (C_Pass_By_Copy, sigset_t);
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514
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515 type pid_t is new int;
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516
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517 type time_t is new long;
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518
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519 type timespec is record
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520 tv_sec : time_t;
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521 tv_nsec : long;
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|
522 end record;
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523 pragma Convention (C, timespec);
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524
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525 type pthread_attr_t is new int;
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526 type pthread_condattr_t is new int;
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527 type pthread_mutexattr_t is new int;
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528 type pthread_t is new int;
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529
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530 type short_array is array (Natural range <>) of short;
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|
531 type int_array is array (Natural range <>) of int;
|
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532
|
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533 type pthread_mutex_t is record
|
|
|
534 m_short : short_array (0 .. 1);
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535 m_int : int;
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536 m_int1 : int_array (0 .. 3);
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537 m_pad : int;
|
|
|
538
|
|
|
539 m_ptr : int;
|
|
|
540 -- actually m_ptr is a void*, and on 32 bit ABI, m_pad is added so that
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|
|
541 -- this field takes 64 bits. On 64 bit ABI, m_pad is gone, and m_ptr is
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|
542 -- a 64 bit void*. Assume int'Size = 32.
|
|
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543
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|
|
544 m_int2 : int_array (0 .. 1);
|
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|
545 m_int3 : int_array (0 .. 3);
|
|
|
546 m_short2 : short_array (0 .. 1);
|
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|
547 m_int4 : int_array (0 .. 4);
|
|
|
548 m_int5 : int_array (0 .. 1);
|
|
|
549 end record;
|
|
|
550 for pthread_mutex_t'Alignment use System.Address'Alignment;
|
|
|
551 pragma Convention (C, pthread_mutex_t);
|
|
|
552
|
|
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553 type pthread_cond_t is record
|
|
|
554 c_short : short_array (0 .. 1);
|
|
|
555 c_int : int;
|
|
|
556 c_int1 : int_array (0 .. 3);
|
|
|
557 m_pad : int;
|
|
|
558 m_ptr : int; -- see comment in pthread_mutex_t
|
|
|
559 c_int2 : int_array (0 .. 1);
|
|
|
560 c_int3 : int_array (0 .. 1);
|
|
|
561 c_int4 : int_array (0 .. 1);
|
|
|
562 end record;
|
|
|
563 for pthread_cond_t'Alignment use System.Address'Alignment;
|
|
|
564 pragma Convention (C, pthread_cond_t);
|
|
|
565
|
|
|
566 type pthread_key_t is new int;
|
|
|
567
|
|
|
568 end System.OS_Interface;
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