gcc/ada/s-osinte-linux-alpha.ads

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                GNU ADA RUN-TIME LIBRARY (GNARL) COMPONENTS               --
   4 --                                                                          --
   5 --                   S Y S T E M . O S _ I N T E R F A C E                  --
   6 --                                                                          --
   7 --                                  S p e c                                 --
   8 --                                                                          --
   9 --             Copyright (C) 1991-1994, Florida State University            --
  10 --             Copyright (C) 1995-2006, Free Software Foundation, Inc.      --
  11 --                                                                          --
  12 -- GNARL is free software; you can  redistribute it  and/or modify it under --
  13 -- terms of the  GNU General Public License as published  by the Free Soft- --
  14 -- ware  Foundation;  either version 2,  or (at your option) any later ver- --
  15 -- sion. GNARL is distributed in the hope that it will be useful, but WITH- --
  16 -- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
  17 -- or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License --
  18 -- for  more details.  You should have  received  a copy of the GNU General --
  19 -- Public License  distributed with GNARL; see file COPYING.  If not, write --
  20 -- to  the  Free Software Foundation,  51  Franklin  Street,  Fifth  Floor, --
  21 -- Boston, MA 02110-1301, USA.                                              --
  22 --                                                                          --
  23 -- As a special exception,  if other files  instantiate  generics from this --
  24 -- unit, or you link  this unit with other files  to produce an executable, --
  25 -- this  unit  does not  by itself cause  the resulting  executable  to  be --
  26 -- covered  by the  GNU  General  Public  License.  This exception does not --
  27 -- however invalidate  any other reasons why  the executable file  might be --
  28 -- covered by the  GNU Public License.                                      --
  29 --                                                                          --
  30 -- GNARL was developed by the GNARL team at Florida State University.       --
  31 -- Extensive contributions were provided by Ada Core Technologies, Inc.     --
  32 --                                                                          --
  33 ------------------------------------------------------------------------------
  34
  35 --  This is a GNU/Linux (GNU/LinuxThreads) version of this package
  36
  37 --  This package encapsulates all direct interfaces to OS services
  38 --  that are needed by children of System.
  39
  40 --  PLEASE DO NOT add any with-clauses to this package or remove the pragma
  41 --  Preelaborate. This package is designed to be a bottom-level (leaf) package.
  42
  43 with Interfaces.C;
  44 with Unchecked_Conversion;
  45
  46 package System.OS_Interface is
  47    pragma Preelaborate;
  48
  49    pragma Linker_Options ("-lpthread");
  50
  51    subtype int            is Interfaces.C.int;
  52    subtype char           is Interfaces.C.char;
  53    subtype short          is Interfaces.C.short;
  54    subtype long           is Interfaces.C.long;
  55    subtype unsigned       is Interfaces.C.unsigned;
  56    subtype unsigned_short is Interfaces.C.unsigned_short;
  57    subtype unsigned_long  is Interfaces.C.unsigned_long;
  58    subtype unsigned_char  is Interfaces.C.unsigned_char;
  59    subtype plain_char     is Interfaces.C.plain_char;
  60    subtype size_t         is Interfaces.C.size_t;
  61
  62    -----------
  63    -- Errno --
  64    -----------
  65
  66    function errno return int;
  67    pragma Import (C, errno, "__get_errno");
  68
  69    EAGAIN    : constant := 35;
  70    EINTR     : constant := 4;
  71    EINVAL    : constant := 22;
  72    ENOMEM    : constant := 12;
  73    EPERM     : constant := 1;
  74    ETIMEDOUT : constant := 60;
  75
  76    -------------
  77    -- Signals --
  78    -------------
  79
  80    Max_Interrupt : constant := 63;
  81    type Signal is new int range 0 .. Max_Interrupt;
  82    for Signal'Size use int'Size;
  83
  84    SIGHUP     : constant := 1; --  hangup
  85    SIGINT     : constant := 2; --  interrupt (rubout)
  86    SIGQUIT    : constant := 3; --  quit (ASCD FS)
  87    SIGILL     : constant := 4; --  illegal instruction (not reset)
  88    SIGTRAP    : constant := 5; --  trace trap (not reset)
  89    SIGIOT     : constant := 6; --  IOT instruction
  90    SIGABRT    : constant := 6; --  used by abort, replace SIGIOT in the  future
  91    SIGFPE     : constant := 8; --  floating point exception
  92    SIGKILL    : constant := 9; --  kill (cannot be caught or ignored)
  93    SIGBUS     : constant := 10; --  bus error
  94    SIGSEGV    : constant := 11; --  segmentation violation
  95    SIGPIPE    : constant := 13; --  write on a pipe with no one to read it
  96    SIGALRM    : constant := 14; --  alarm clock
  97    SIGTERM    : constant := 15; --  software termination signal from kill
  98    SIGURG     : constant := 16; --  urgent condition on IO channel
  99    SIGSTOP    : constant := 17; --  stop (cannot be caught or ignored)
 100    SIGTSTP    : constant := 18; --  user stop requested from tty
 101    SIGCONT    : constant := 19; --  stopped process has been continued
 102    SIGCLD     : constant := 20; --  alias for SIGCHLD
 103    SIGCHLD    : constant := 20; --  child status change
 104    SIGTTIN    : constant := 21; --  background tty read attempted
 105    SIGTTOU    : constant := 22; --  background tty write attempted
 106    SIGIO      : constant := 23; --  I/O now possible (4.2 BSD)
 107    SIGPOLL    : constant := 23; --  pollable event occurred
 108    SIGXCPU    : constant := 24; --  CPU time limit exceeded
 109    SIGXFSZ    : constant := 25; --  filesize limit exceeded
 110    SIGVTALRM  : constant := 26; --  virtual timer expired
 111    SIGPROF    : constant := 27; --  profiling timer expired
 112    SIGWINCH   : constant := 28; --  window size change
 113    SIGPWR     : constant := 29; --  power-fail restart
 114    SIGUSR1    : constant := 30; --  user defined signal 1
 115    SIGUSR2    : constant := 31; --  user defined signal 2
 116
 117    SIGLTHRRES : constant := 32; --  GNU/LinuxThreads restart signal
 118    SIGLTHRCAN : constant := 33; --  GNU/LinuxThreads cancel signal
 119    SIGLTHRDBG : constant := 34; --  GNU/LinuxThreads debugger signal
 120
 121    SIGADAABORT : constant := SIGABRT;
 122    --  Change this if you want to use another signal for task abort.
 123    --  SIGTERM might be a good one.
 124
 125    SIGUNUSED  : constant := 0;
 126    SIGSTKFLT  : constant := 0;
 127    SIGLOST    : constant := 0;
 128    --  These don't exist for Linux/Alpha.  The constants are present
 129    --  so that we can continue to use a-intnam-linux.ads.
 130
 131    type Signal_Set is array (Natural range <>) of Signal;
 132
 133    Unmasked    : constant Signal_Set := (
 134       SIGTRAP,
 135       --  To enable debugging on multithreaded applications, mark SIGTRAP to
 136       --  be kept unmasked.
 137
 138       SIGBUS,
 139
 140       SIGTTIN, SIGTTOU, SIGTSTP,
 141       --  Keep these three signals unmasked so that background processes
 142       --  and IO behaves as normal "C" applications
 143
 144       SIGPROF,
 145       --  To avoid confusing the profiler
 146
 147       SIGKILL, SIGSTOP,
 148       --  These two signals actually cannot be masked;
 149       --  POSIX simply won't allow it.
 150
 151       SIGLTHRRES, SIGLTHRCAN, SIGLTHRDBG);
 152       --  These three signals are used by GNU/LinuxThreads starting from
 153       --  glibc 2.1 (future 2.2).
 154
 155    Reserved    : constant Signal_Set := (SIGKILL, SIGSTOP);
 156
 157    type sigset_t is private;
 158
 159    function sigaddset (set : access sigset_t; sig : Signal) return int;
 160    pragma Import (C, sigaddset, "sigaddset");
 161
 162    function sigdelset (set : access sigset_t; sig : Signal) return int;
 163    pragma Import (C, sigdelset, "sigdelset");
 164
 165    function sigfillset (set : access sigset_t) return int;
 166    pragma Import (C, sigfillset, "sigfillset");
 167
 168    function sigismember (set : access sigset_t; sig : Signal) return int;
 169    pragma Import (C, sigismember, "sigismember");
 170
 171    function sigemptyset (set : access sigset_t) return int;
 172    pragma Import (C, sigemptyset, "sigemptyset");
 173
 174    type union_type_3 is new String (1 .. 116);
 175    type siginfo_t is record
 176       si_signo : int;
 177       si_code  : int;
 178       si_errno : int;
 179       X_data   : union_type_3;
 180    end record;
 181    pragma Convention (C, siginfo_t);
 182
 183    type struct_sigaction is record
 184       sa_handler   : System.Address;
 185       sa_mask      : sigset_t;
 186       sa_flags     : unsigned_long;
 187    end record;
 188    pragma Convention (C, struct_sigaction);
 189    type struct_sigaction_ptr is access all struct_sigaction;
 190
 191    type Machine_State is record
 192      dummy : unsigned_long;
 193    end record;
 194    type Machine_State_Ptr is access all Machine_State;
 195
 196    SA_SIGINFO  : constant := 16#40#;
 197
 198    SIG_BLOCK   : constant := 0;
 199    SIG_UNBLOCK : constant := 1;
 200    SIG_SETMASK : constant := 2;
 201
 202    SIG_DFL : constant := 0;
 203    SIG_IGN : constant := 1;
 204
 205    function sigaction
 206      (sig  : Signal;
 207       act  : struct_sigaction_ptr;
 208       oact : struct_sigaction_ptr) return int;
 209    pragma Import (C, sigaction, "sigaction");
 210
 211    ----------
 212    -- Time --
 213    ----------
 214
 215    type timespec is private;
 216
 217    function To_Duration (TS : timespec) return Duration;
 218    pragma Inline (To_Duration);
 219
 220    function To_Timespec (D : Duration) return timespec;
 221    pragma Inline (To_Timespec);
 222
 223    type struct_timeval is private;
 224
 225    function To_Duration (TV : struct_timeval) return Duration;
 226    pragma Inline (To_Duration);
 227
 228    function To_Timeval (D : Duration) return struct_timeval;
 229    pragma Inline (To_Timeval);
 230
 231    function gettimeofday
 232      (tv : access struct_timeval;
 233       tz : System.Address := System.Null_Address) return int;
 234    pragma Import (C, gettimeofday, "gettimeofday");
 235
 236    function sysconf (name : int) return long;
 237    pragma Import (C, sysconf);
 238
 239    SC_CLK_TCK : constant := 2;
 240
 241    -------------------------
 242    -- Priority Scheduling --
 243    -------------------------
 244
 245    SCHED_OTHER : constant := 0;
 246    SCHED_FIFO  : constant := 1;
 247    SCHED_RR    : constant := 2;
 248
 249    function To_Target_Priority
 250      (Prio : System.Any_Priority) return Interfaces.C.int;
 251    --  Maps System.Any_Priority to a POSIX priority.
 252
 253    -------------
 254    -- Process --
 255    -------------
 256
 257    type pid_t is private;
 258
 259    function kill (pid : pid_t; sig : Signal) return int;
 260    pragma Import (C, kill, "kill");
 261
 262    function getpid return pid_t;
 263    pragma Import (C, getpid, "getpid");
 264
 265    -------------
 266    -- Threads --
 267    -------------
 268
 269    type Thread_Body is access
 270      function (arg : System.Address) return System.Address;
 271
 272    function Thread_Body_Access is new
 273      Unchecked_Conversion (System.Address, Thread_Body);
 274
 275    type pthread_t is new unsigned_long;
 276    subtype Thread_Id        is pthread_t;
 277
 278    function To_pthread_t is new Unchecked_Conversion
 279      (unsigned_long, pthread_t);
 280
 281    type pthread_mutex_t     is limited private;
 282    type pthread_cond_t      is limited private;
 283    type pthread_attr_t      is limited private;
 284    type pthread_mutexattr_t is limited private;
 285    type pthread_condattr_t  is limited private;
 286    type pthread_key_t       is private;
 287
 288    PTHREAD_CREATE_DETACHED : constant := 1;
 289
 290    -----------
 291    -- Stack --
 292    -----------
 293
 294    function Get_Stack_Base (thread : pthread_t) return Address;
 295    pragma Inline (Get_Stack_Base);
 296    --  This is a dummy procedure to share some GNULLI files
 297
 298    ---------------------------------------
 299    -- Nonstandard Thread Initialization --
 300    ---------------------------------------
 301
 302    procedure pthread_init;
 303    pragma Inline (pthread_init);
 304    --  This is a dummy procedure to share some GNULLI files
 305
 306    -------------------------
 307    -- POSIX.1c  Section 3 --
 308    -------------------------
 309
 310    function sigwait (set : access sigset_t; sig : access Signal) return int;
 311    pragma Import (C, sigwait, "sigwait");
 312
 313    function pthread_kill (thread : pthread_t; sig : Signal) return int;
 314    pragma Import (C, pthread_kill, "pthread_kill");
 315
 316    function pthread_sigmask
 317      (how  : int;
 318       set  : access sigset_t;
 319       oset : access sigset_t) return int;
 320    pragma Import (C, pthread_sigmask, "pthread_sigmask");
 321
 322    --------------------------
 323    -- POSIX.1c  Section 11 --
 324    --------------------------
 325
 326    function pthread_mutexattr_init
 327      (attr : access pthread_mutexattr_t) return int;
 328    pragma Import (C, pthread_mutexattr_init, "pthread_mutexattr_init");
 329
 330    function pthread_mutexattr_destroy
 331      (attr : access pthread_mutexattr_t) return int;
 332    pragma Import (C, pthread_mutexattr_destroy, "pthread_mutexattr_destroy");
 333
 334    function pthread_mutex_init
 335      (mutex : access pthread_mutex_t;
 336       attr  : access pthread_mutexattr_t) return int;
 337    pragma Import (C, pthread_mutex_init, "pthread_mutex_init");
 338
 339    function pthread_mutex_destroy (mutex : access pthread_mutex_t) return int;
 340    pragma Import (C, pthread_mutex_destroy, "pthread_mutex_destroy");
 341
 342    function pthread_mutex_lock (mutex : access pthread_mutex_t) return int;
 343    pragma Import (C, pthread_mutex_lock, "pthread_mutex_lock");
 344
 345    function pthread_mutex_unlock (mutex : access pthread_mutex_t) return int;
 346    pragma Import (C, pthread_mutex_unlock, "pthread_mutex_unlock");
 347
 348    function pthread_condattr_init
 349      (attr : access pthread_condattr_t) return int;
 350    pragma Import (C, pthread_condattr_init, "pthread_condattr_init");
 351
 352    function pthread_condattr_destroy
 353      (attr : access pthread_condattr_t) return int;
 354    pragma Import (C, pthread_condattr_destroy, "pthread_condattr_destroy");
 355
 356    function pthread_cond_init
 357      (cond : access pthread_cond_t;
 358       attr : access pthread_condattr_t) return int;
 359    pragma Import (C, pthread_cond_init, "pthread_cond_init");
 360
 361    function pthread_cond_destroy (cond : access pthread_cond_t) return int;
 362    pragma Import (C, pthread_cond_destroy, "pthread_cond_destroy");
 363
 364    function pthread_cond_signal (cond : access pthread_cond_t) return int;
 365    pragma Import (C, pthread_cond_signal, "pthread_cond_signal");
 366
 367    function pthread_cond_wait
 368      (cond  : access pthread_cond_t;
 369       mutex : access pthread_mutex_t) return int;
 370    pragma Import (C, pthread_cond_wait, "pthread_cond_wait");
 371
 372    function pthread_cond_timedwait
 373      (cond    : access pthread_cond_t;
 374       mutex   : access pthread_mutex_t;
 375       abstime : access timespec) return int;
 376    pragma Import (C, pthread_cond_timedwait, "pthread_cond_timedwait");
 377
 378    --------------------------
 379    -- POSIX.1c  Section 13 --
 380    --------------------------
 381
 382    type struct_sched_param is record
 383       sched_priority : int;  --  scheduling priority
 384    end record;
 385    pragma Convention (C, struct_sched_param);
 386
 387    function pthread_setschedparam
 388      (thread : pthread_t;
 389       policy : int;
 390       param  : access struct_sched_param) return int;
 391    pragma Import (C, pthread_setschedparam, "pthread_setschedparam");
 392
 393    function pthread_attr_setschedpolicy
 394      (attr   : access pthread_attr_t;
 395       policy : int) return int;
 396    pragma Import
 397      (C, pthread_attr_setschedpolicy, "pthread_attr_setschedpolicy");
 398
 399    function sched_yield return int;
 400    pragma Import (C, sched_yield, "sched_yield");
 401
 402    ---------------------------
 403    -- P1003.1c - Section 16 --
 404    ---------------------------
 405
 406    function pthread_attr_init
 407      (attributes : access pthread_attr_t) return int;
 408    pragma Import (C, pthread_attr_init, "pthread_attr_init");
 409
 410    function pthread_attr_destroy
 411      (attributes : access pthread_attr_t) return int;
 412    pragma Import (C, pthread_attr_destroy, "pthread_attr_destroy");
 413
 414    function pthread_attr_setdetachstate
 415      (attr        : access pthread_attr_t;
 416       detachstate : int) return int;
 417    pragma Import
 418      (C, pthread_attr_setdetachstate, "pthread_attr_setdetachstate");
 419
 420    function pthread_attr_setstacksize
 421      (attr      : access pthread_attr_t;
 422       stacksize : size_t) return int;
 423    pragma Import (C, pthread_attr_setstacksize, "pthread_attr_setstacksize");
 424
 425    function pthread_create
 426      (thread        : access pthread_t;
 427       attributes    : access pthread_attr_t;
 428       start_routine : Thread_Body;
 429       arg           : System.Address) return int;
 430    pragma Import (C, pthread_create, "pthread_create");
 431
 432    procedure pthread_exit (status : System.Address);
 433    pragma Import (C, pthread_exit, "pthread_exit");
 434
 435    function pthread_self return pthread_t;
 436    pragma Import (C, pthread_self, "pthread_self");
 437
 438    --------------------------
 439    -- POSIX.1c  Section 17 --
 440    --------------------------
 441
 442    function pthread_setspecific
 443      (key   : pthread_key_t;
 444       value : System.Address) return int;
 445    pragma Import (C, pthread_setspecific, "pthread_setspecific");
 446
 447    function pthread_getspecific (key : pthread_key_t) return System.Address;
 448    pragma Import (C, pthread_getspecific, "pthread_getspecific");
 449
 450    type destructor_pointer is access procedure (arg : System.Address);
 451
 452    function pthread_key_create
 453      (key        : access pthread_key_t;
 454       destructor : destructor_pointer) return int;
 455    pragma Import (C, pthread_key_create, "pthread_key_create");
 456
 457 private
 458
 459    type sigset_t is record
 460       dum0, dum1, dum2, dum3, dum4, dum5, dum6, dum7 : unsigned_long;
 461       dum8, dum9, dum10, dum11, dum12, dum13, dum14, dum15 : unsigned_long;
 462    end record;
 463    pragma Convention (C, sigset_t);
 464
 465    type pid_t is new int;
 466
 467    type time_t is new long;
 468
 469    type timespec is record
 470       tv_sec  : time_t;
 471       tv_nsec : long;
 472    end record;
 473    pragma Convention (C, timespec);
 474
 475    type struct_timeval is record
 476       tv_sec  : time_t;
 477       tv_usec : time_t;
 478    end record;
 479    pragma Convention (C, struct_timeval);
 480
 481    type pthread_attr_t is record
 482       dum0, dum1, dum2, dum3, dum4, dum5, dum6 : unsigned_long;
 483    end record;
 484    pragma Convention (C, pthread_attr_t);
 485
 486    type pthread_condattr_t is record
 487       dummy : int;
 488    end record;
 489    pragma Convention (C, pthread_condattr_t);
 490
 491    type pthread_mutexattr_t is record
 492       mutexkind : int;
 493    end record;
 494    pragma Convention (C, pthread_mutexattr_t);
 495
 496    type pthread_mutex_t is record
 497       dum0, dum1, dum2, dum3, dum4 : unsigned_long;
 498    end record;
 499    pragma Convention (C, pthread_mutex_t);
 500
 501    type pthread_cond_t is record
 502       dum0, dum1, dum2, dum3, dum4, dum5 : unsigned_long;
 503    end record;
 504    pragma Convention (C, pthread_cond_t);
 505
 506    type pthread_key_t is new unsigned;
 507
 508 end System.OS_Interface;