gcc/ada/s-osinte-linux.ads

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                 GNAT 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 := 11;
  70    EINTR     : constant := 4;
  71    EINVAL    : constant := 22;
  72    ENOMEM    : constant := 12;
  73    EPERM     : constant := 1;
  74    ETIMEDOUT : constant := 110;
  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 := 7; --  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    SIGUSR1    : constant := 10; --  user defined signal 1
  99    SIGUSR2    : constant := 12; --  user defined signal 2
 100    SIGCLD     : constant := 17; --  alias for SIGCHLD
 101    SIGCHLD    : constant := 17; --  child status change
 102    SIGPWR     : constant := 30; --  power-fail restart
 103    SIGWINCH   : constant := 28; --  window size change
 104    SIGURG     : constant := 23; --  urgent condition on IO channel
 105    SIGPOLL    : constant := 29; --  pollable event occurred
 106    SIGIO      : constant := 29; --  I/O now possible (4.2 BSD)
 107    SIGLOST    : constant := 29; --  File lock lost
 108    SIGSTOP    : constant := 19; --  stop (cannot be caught or ignored)
 109    SIGTSTP    : constant := 20; --  user stop requested from tty
 110    SIGCONT    : constant := 18; --  stopped process has been continued
 111    SIGTTIN    : constant := 21; --  background tty read attempted
 112    SIGTTOU    : constant := 22; --  background tty write attempted
 113    SIGVTALRM  : constant := 26; --  virtual timer expired
 114    SIGPROF    : constant := 27; --  profiling timer expired
 115    SIGXCPU    : constant := 24; --  CPU time limit exceeded
 116    SIGXFSZ    : constant := 25; --  filesize limit exceeded
 117    SIGUNUSED  : constant := 31; --  unused signal (GNU/Linux)
 118    SIGSTKFLT  : constant := 16; --  coprocessor stack fault (Linux)
 119    SIGLTHRRES : constant := 32; --  GNU/LinuxThreads restart signal
 120    SIGLTHRCAN : constant := 33; --  GNU/LinuxThreads cancel signal
 121    SIGLTHRDBG : constant := 34; --  GNU/LinuxThreads debugger signal
 122
 123    SIGADAABORT : constant := SIGABRT;
 124    --  Change this if you want to use another signal for task abort.
 125    --  SIGTERM might be a good one.
 126
 127    type Signal_Set is array (Natural range <>) of Signal;
 128
 129    Unmasked    : constant Signal_Set := (
 130       SIGTRAP,
 131       --  To enable debugging on multithreaded applications, mark SIGTRAP to
 132       --  be kept unmasked.
 133
 134       SIGBUS,
 135
 136       SIGTTIN, SIGTTOU, SIGTSTP,
 137       --  Keep these three signals unmasked so that background processes
 138       --  and IO behaves as normal "C" applications
 139
 140       SIGPROF,
 141       --  To avoid confusing the profiler
 142
 143       SIGKILL, SIGSTOP,
 144       --  These two signals actually cannot be masked;
 145       --  POSIX simply won't allow it.
 146
 147       SIGLTHRRES, SIGLTHRCAN, SIGLTHRDBG);
 148       --  These three signals are used by GNU/LinuxThreads starting from
 149       --  glibc 2.1 (future 2.2).
 150
 151    Reserved    : constant Signal_Set :=
 152    --  I am not sure why the following two signals are reserved.
 153    --  I guess they are not supported by this version of GNU/Linux.
 154      (SIGVTALRM, SIGUNUSED);
 155
 156    type sigset_t is private;
 157
 158    function sigaddset (set : access sigset_t; sig : Signal) return int;
 159    pragma Import (C, sigaddset, "sigaddset");
 160
 161    function sigdelset (set : access sigset_t; sig : Signal) return int;
 162    pragma Import (C, sigdelset, "sigdelset");
 163
 164    function sigfillset (set : access sigset_t) return int;
 165    pragma Import (C, sigfillset, "sigfillset");
 166
 167    function sigismember (set : access sigset_t; sig : Signal) return int;
 168    pragma Import (C, sigismember, "sigismember");
 169
 170    function sigemptyset (set : access sigset_t) return int;
 171    pragma Import (C, sigemptyset, "sigemptyset");
 172
 173    type union_type_3 is new String (1 .. 116);
 174    type siginfo_t is record
 175       si_signo : int;
 176       si_code  : int;
 177       si_errno : int;
 178       X_data   : union_type_3;
 179    end record;
 180    pragma Convention (C, siginfo_t);
 181
 182    type struct_sigaction is record
 183       sa_handler   : System.Address;
 184       sa_mask      : sigset_t;
 185       sa_flags     : unsigned_long;
 186       sa_restorer  : System.Address;
 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       eip : unsigned_long;
 193       ebx : unsigned_long;
 194       esp : unsigned_long;
 195       ebp : unsigned_long;
 196       esi : unsigned_long;
 197       edi : unsigned_long;
 198    end record;
 199    type Machine_State_Ptr is access all Machine_State;
 200
 201    SA_SIGINFO  : constant := 16#04#;
 202
 203    SIG_BLOCK   : constant := 0;
 204    SIG_UNBLOCK : constant := 1;
 205    SIG_SETMASK : constant := 2;
 206
 207    SIG_DFL : constant := 0;
 208    SIG_IGN : constant := 1;
 209
 210    function sigaction
 211      (sig  : Signal;
 212       act  : struct_sigaction_ptr;
 213       oact : struct_sigaction_ptr) return int;
 214    pragma Import (C, sigaction, "sigaction");
 215
 216    ----------
 217    -- Time --
 218    ----------
 219
 220    type timespec is private;
 221
 222    function To_Duration (TS : timespec) return Duration;
 223    pragma Inline (To_Duration);
 224
 225    function To_Timespec (D : Duration) return timespec;
 226    pragma Inline (To_Timespec);
 227
 228    type struct_timeval is private;
 229
 230    function To_Duration (TV : struct_timeval) return Duration;
 231    pragma Inline (To_Duration);
 232
 233    function To_Timeval (D : Duration) return struct_timeval;
 234    pragma Inline (To_Timeval);
 235
 236    function gettimeofday
 237      (tv : access struct_timeval;
 238       tz : System.Address := System.Null_Address) return int;
 239    pragma Import (C, gettimeofday, "gettimeofday");
 240
 241    function sysconf (name : int) return long;
 242    pragma Import (C, sysconf);
 243
 244    SC_CLK_TCK : constant := 2;
 245
 246    -------------------------
 247    -- Priority Scheduling --
 248    -------------------------
 249
 250    SCHED_OTHER : constant := 0;
 251    SCHED_FIFO  : constant := 1;
 252    SCHED_RR    : constant := 2;
 253
 254    function To_Target_Priority
 255      (Prio : System.Any_Priority) return Interfaces.C.int;
 256    --  Maps System.Any_Priority to a POSIX priority.
 257
 258    -------------
 259    -- Process --
 260    -------------
 261
 262    type pid_t is private;
 263
 264    function kill (pid : pid_t; sig : Signal) return int;
 265    pragma Import (C, kill, "kill");
 266
 267    function getpid return pid_t;
 268    pragma Import (C, getpid, "getpid");
 269
 270    -------------
 271    -- Threads --
 272    -------------
 273
 274    type Thread_Body is access
 275      function (arg : System.Address) return System.Address;
 276
 277    function Thread_Body_Access is new
 278      Unchecked_Conversion (System.Address, Thread_Body);
 279
 280    type pthread_t is new unsigned_long;
 281    subtype Thread_Id        is pthread_t;
 282
 283    function To_pthread_t is new Unchecked_Conversion
 284      (unsigned_long, pthread_t);
 285
 286    type pthread_mutex_t     is limited private;
 287    type pthread_cond_t      is limited private;
 288    type pthread_attr_t      is limited private;
 289    type pthread_mutexattr_t is limited private;
 290    type pthread_condattr_t  is limited private;
 291    type pthread_key_t       is private;
 292
 293    PTHREAD_CREATE_DETACHED : constant := 1;
 294
 295    -----------
 296    -- Stack --
 297    -----------
 298
 299    function Get_Stack_Base (thread : pthread_t) return Address;
 300    pragma Inline (Get_Stack_Base);
 301    --  This is a dummy procedure to share some GNULLI files
 302
 303    ---------------------------------------
 304    -- Nonstandard Thread Initialization --
 305    ---------------------------------------
 306
 307    procedure pthread_init;
 308    pragma Inline (pthread_init);
 309    --  This is a dummy procedure to share some GNULLI files
 310
 311    -------------------------
 312    -- POSIX.1c  Section 3 --
 313    -------------------------
 314
 315    function sigwait (set : access sigset_t; sig : access Signal) return int;
 316    pragma Import (C, sigwait, "sigwait");
 317
 318    function pthread_kill (thread : pthread_t; sig : Signal) return int;
 319    pragma Import (C, pthread_kill, "pthread_kill");
 320
 321    function pthread_sigmask
 322      (how  : int;
 323       set  : access sigset_t;
 324       oset : access sigset_t) return int;
 325    pragma Import (C, pthread_sigmask, "pthread_sigmask");
 326
 327    --------------------------
 328    -- POSIX.1c  Section 11 --
 329    --------------------------
 330
 331    function pthread_mutexattr_init
 332      (attr : access pthread_mutexattr_t) return int;
 333    pragma Import (C, pthread_mutexattr_init, "pthread_mutexattr_init");
 334
 335    function pthread_mutexattr_destroy
 336      (attr : access pthread_mutexattr_t) return int;
 337    pragma Import (C, pthread_mutexattr_destroy, "pthread_mutexattr_destroy");
 338
 339    function pthread_mutex_init
 340      (mutex : access pthread_mutex_t;
 341       attr  : access pthread_mutexattr_t) return int;
 342    pragma Import (C, pthread_mutex_init, "pthread_mutex_init");
 343
 344    function pthread_mutex_destroy (mutex : access pthread_mutex_t) return int;
 345    pragma Import (C, pthread_mutex_destroy, "pthread_mutex_destroy");
 346
 347    function pthread_mutex_lock (mutex : access pthread_mutex_t) return int;
 348    pragma Import (C, pthread_mutex_lock, "pthread_mutex_lock");
 349
 350    function pthread_mutex_unlock (mutex : access pthread_mutex_t) return int;
 351    pragma Import (C, pthread_mutex_unlock, "pthread_mutex_unlock");
 352
 353    function pthread_condattr_init
 354      (attr : access pthread_condattr_t) return int;
 355    pragma Import (C, pthread_condattr_init, "pthread_condattr_init");
 356
 357    function pthread_condattr_destroy
 358      (attr : access pthread_condattr_t) return int;
 359    pragma Import (C, pthread_condattr_destroy, "pthread_condattr_destroy");
 360
 361    function pthread_cond_init
 362      (cond : access pthread_cond_t;
 363       attr : access pthread_condattr_t) return int;
 364    pragma Import (C, pthread_cond_init, "pthread_cond_init");
 365
 366    function pthread_cond_destroy (cond : access pthread_cond_t) return int;
 367    pragma Import (C, pthread_cond_destroy, "pthread_cond_destroy");
 368
 369    function pthread_cond_signal (cond : access pthread_cond_t) return int;
 370    pragma Import (C, pthread_cond_signal, "pthread_cond_signal");
 371
 372    function pthread_cond_wait
 373      (cond  : access pthread_cond_t;
 374       mutex : access pthread_mutex_t) return int;
 375    pragma Import (C, pthread_cond_wait, "pthread_cond_wait");
 376
 377    function pthread_cond_timedwait
 378      (cond    : access pthread_cond_t;
 379       mutex   : access pthread_mutex_t;
 380       abstime : access timespec) return int;
 381    pragma Import (C, pthread_cond_timedwait, "pthread_cond_timedwait");
 382
 383    --------------------------
 384    -- POSIX.1c  Section 13 --
 385    --------------------------
 386
 387    type struct_sched_param is record
 388       sched_priority : int;  --  scheduling priority
 389    end record;
 390    pragma Convention (C, struct_sched_param);
 391
 392    function pthread_setschedparam
 393      (thread : pthread_t;
 394       policy : int;
 395       param  : access struct_sched_param) return int;
 396    pragma Import (C, pthread_setschedparam, "pthread_setschedparam");
 397
 398    function pthread_attr_setschedpolicy
 399      (attr   : access pthread_attr_t;
 400       policy : int) return int;
 401    pragma Import
 402      (C, pthread_attr_setschedpolicy, "pthread_attr_setschedpolicy");
 403
 404    function sched_yield return int;
 405    pragma Import (C, sched_yield, "sched_yield");
 406
 407    ---------------------------
 408    -- P1003.1c - Section 16 --
 409    ---------------------------
 410
 411    function pthread_attr_init
 412      (attributes : access pthread_attr_t) return int;
 413    pragma Import (C, pthread_attr_init, "pthread_attr_init");
 414
 415    function pthread_attr_destroy
 416      (attributes : access pthread_attr_t) return int;
 417    pragma Import (C, pthread_attr_destroy, "pthread_attr_destroy");
 418
 419    function pthread_attr_setdetachstate
 420      (attr        : access pthread_attr_t;
 421       detachstate : int) return int;
 422    pragma Import
 423      (C, pthread_attr_setdetachstate, "pthread_attr_setdetachstate");
 424
 425    function pthread_attr_setstacksize
 426      (attr      : access pthread_attr_t;
 427       stacksize : size_t) return int;
 428    pragma Import (C, pthread_attr_setstacksize, "pthread_attr_setstacksize");
 429
 430    function pthread_create
 431      (thread        : access pthread_t;
 432       attributes    : access pthread_attr_t;
 433       start_routine : Thread_Body;
 434       arg           : System.Address) return int;
 435    pragma Import (C, pthread_create, "pthread_create");
 436
 437    procedure pthread_exit (status : System.Address);
 438    pragma Import (C, pthread_exit, "pthread_exit");
 439
 440    function pthread_self return pthread_t;
 441    pragma Import (C, pthread_self, "pthread_self");
 442
 443    --------------------------
 444    -- POSIX.1c  Section 17 --
 445    --------------------------
 446
 447    function pthread_setspecific
 448      (key   : pthread_key_t;
 449       value : System.Address) return int;
 450    pragma Import (C, pthread_setspecific, "pthread_setspecific");
 451
 452    function pthread_getspecific (key : pthread_key_t) return System.Address;
 453    pragma Import (C, pthread_getspecific, "pthread_getspecific");
 454
 455    type destructor_pointer is access procedure (arg : System.Address);
 456
 457    function pthread_key_create
 458      (key        : access pthread_key_t;
 459       destructor : destructor_pointer) return int;
 460    pragma Import (C, pthread_key_create, "pthread_key_create");
 461
 462 private
 463
 464    type sigset_t is array (0 .. 127) of unsigned_char;
 465    pragma Convention (C, sigset_t);
 466
 467    type pid_t is new int;
 468
 469    type time_t is new long;
 470
 471    type timespec is record
 472       tv_sec  : time_t;
 473       tv_nsec : long;
 474    end record;
 475    pragma Convention (C, timespec);
 476
 477    type struct_timeval is record
 478       tv_sec  : time_t;
 479       tv_usec : time_t;
 480    end record;
 481    pragma Convention (C, struct_timeval);
 482
 483    type pthread_attr_t is record
 484       detachstate   : int;
 485       schedpolicy   : int;
 486       schedparam    : struct_sched_param;
 487       inheritsched  : int;
 488       scope         : int;
 489       guardsize     : size_t;
 490       stackaddr_set : int;
 491       stackaddr     : System.Address;
 492       stacksize     : size_t;
 493    end record;
 494    pragma Convention (C, pthread_attr_t);
 495
 496    type pthread_condattr_t is record
 497       dummy : int;
 498    end record;
 499    pragma Convention (C, pthread_condattr_t);
 500
 501    type pthread_mutexattr_t is record
 502       mutexkind : int;
 503    end record;
 504    pragma Convention (C, pthread_mutexattr_t);
 505
 506    type struct_pthread_fast_lock is record
 507       status   : long;
 508       spinlock : int;
 509    end record;
 510    pragma Convention (C, struct_pthread_fast_lock);
 511
 512    type pthread_mutex_t is record
 513       m_reserved : int;
 514       m_count    : int;
 515       m_owner    : System.Address;
 516       m_kind     : int;
 517       m_lock     : struct_pthread_fast_lock;
 518    end record;
 519    pragma Convention (C, pthread_mutex_t);
 520
 521    type pthread_cond_t is array (0 .. 47) of unsigned_char;
 522    pragma Convention (C, pthread_cond_t);
 523
 524    type pthread_key_t is new unsigned;
 525
 526 end System.OS_Interface;