gcc/ada/s-osinte-linux-hppa.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 --                          (GNU/Linux-HPPA Version)                        --
   9 --                                                                          --
  10 --             Copyright (C) 1991-1994, Florida State University            --
  11 --             Copyright (C) 1995-2007, Free Software Foundation, Inc.      --
  12 --                                                                          --
  13 -- GNARL is free software; you can  redistribute it  and/or modify it under --
  14 -- terms of the  GNU General Public License as published  by the Free Soft- --
  15 -- ware  Foundation;  either version 2,  or (at your option) any later ver- --
  16 -- sion. GNARL is distributed in the hope that it will be useful, but WITH- --
  17 -- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
  18 -- or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License --
  19 -- for  more details.  You should have  received  a copy of the GNU General --
  20 -- Public License  distributed with GNARL; see file COPYING.  If not, write --
  21 -- to  the  Free Software Foundation,  51  Franklin  Street,  Fifth  Floor, --
  22 -- Boston, MA 02110-1301, USA.                                              --
  23 --                                                                          --
  24 -- As a special exception,  if other files  instantiate  generics from this --
  25 -- unit, or you link  this unit with other files  to produce an executable, --
  26 -- this  unit  does not  by itself cause  the resulting  executable  to  be --
  27 -- covered  by the  GNU  General  Public  License.  This exception does not --
  28 -- however invalidate  any other reasons why  the executable file  might be --
  29 -- covered by the  GNU Public License.                                      --
  30 --                                                                          --
  31 -- GNARL was developed by the GNARL team at Florida State University.       --
  32 -- Extensive contributions were provided by Ada Core Technologies, Inc.     --
  33 --                                                                          --
  34 ------------------------------------------------------------------------------
  35
  36 --  This is a GNU/Linux (GNU/LinuxThreads) version of this package
  37
  38 --  This package encapsulates all direct interfaces to OS services
  39 --  that are needed by children of System.
  40
  41 --  PLEASE DO NOT add any with-clauses to this package or remove the pragma
  42 --  Preelaborate. This package is designed to be a bottom-level (leaf) package.
  43
  44 with Interfaces.C;
  45 with Ada.Unchecked_Conversion;
  46
  47 package System.OS_Interface is
  48    pragma Preelaborate;
  49
  50    pragma Linker_Options ("-lpthread");
  51
  52    subtype int            is Interfaces.C.int;
  53    subtype char           is Interfaces.C.char;
  54    subtype short          is Interfaces.C.short;
  55    subtype long           is Interfaces.C.long;
  56    subtype unsigned       is Interfaces.C.unsigned;
  57    subtype unsigned_short is Interfaces.C.unsigned_short;
  58    subtype unsigned_long  is Interfaces.C.unsigned_long;
  59    subtype unsigned_char  is Interfaces.C.unsigned_char;
  60    subtype plain_char     is Interfaces.C.plain_char;
  61    subtype size_t         is Interfaces.C.size_t;
  62
  63    -----------
  64    -- Errno --
  65    -----------
  66
  67    function errno return int;
  68    pragma Import (C, errno, "__get_errno");
  69
  70    EAGAIN    : constant := 11;
  71    EINTR     : constant := 4;
  72    EINVAL    : constant := 22;
  73    ENOMEM    : constant := 12;
  74    EPERM     : constant := 1;
  75    ETIMEDOUT : constant := 238;
  76
  77    -------------
  78    -- Signals --
  79    -------------
  80
  81    Max_Interrupt : constant := 63;
  82    type Signal is new int range 0 .. Max_Interrupt;
  83    for Signal'Size use int'Size;
  84
  85    SIGHUP     : constant := 1; --  hangup
  86    SIGINT     : constant := 2; --  interrupt (rubout)
  87    SIGQUIT    : constant := 3; --  quit (ASCD FS)
  88    SIGILL     : constant := 4; --  illegal instruction (not reset)
  89    SIGTRAP    : constant := 5; --  trace trap (not reset)
  90    SIGIOT     : constant := 6; --  IOT instruction
  91    SIGABRT    : constant := 6; --  used by abort, replace SIGIOT in the  future
  92    SIGEMT     : constant := 7; --  EMT
  93    SIGFPE     : constant := 8; --  floating point exception
  94    SIGKILL    : constant := 9; --  kill (cannot be caught or ignored)
  95    SIGBUS     : constant := 10; --  bus error
  96    SIGSEGV    : constant := 11; --  segmentation violation
  97    SIGSYS     : constant := 12; --  bad system call
  98    SIGPIPE    : constant := 13; --  write on a pipe with no one to read it
  99    SIGALRM    : constant := 14; --  alarm clock
 100    SIGTERM    : constant := 15; --  software termination signal from kill
 101    SIGUSR1    : constant := 16; --  user defined signal 1
 102    SIGUSR2    : constant := 17; --  user defined signal 2
 103    SIGCLD     : constant := 18; --  alias for SIGCHLD
 104    SIGCHLD    : constant := 18; --  child status change
 105    SIGPWR     : constant := 19; --  power-fail restart
 106    SIGVTALRM  : constant := 20; --  virtual timer expired
 107    SIGPROF    : constant := 21; --  profiling timer expired
 108    SIGPOLL    : constant := 22; --  pollable event occurred
 109    SIGIO      : constant := 22; --  I/O now possible (4.2 BSD)
 110    SIGWINCH   : constant := 23; --  window size change
 111    SIGSTOP    : constant := 24; --  stop (cannot be caught or ignored)
 112    SIGTSTP    : constant := 25; --  user stop requested from tty
 113    SIGCONT    : constant := 26; --  stopped process has been continued
 114    SIGTTIN    : constant := 27; --  background tty read attempted
 115    SIGTTOU    : constant := 28; --  background tty write attempted
 116    SIGURG     : constant := 29; --  urgent condition on IO channel
 117    SIGLOST    : constant := 30; --  File lock lost
 118    SIGUNUSED  : constant := 31; --  unused signal (GNU/Linux)
 119    SIGXCPU    : constant := 33; --  CPU time limit exceeded
 120    SIGXFSZ    : constant := 34; --  filesize limit exceeded
 121    SIGSTKFLT  : constant := 36; --  coprocessor stack fault (Linux)
 122    SIGLTHRRES : constant := 37; --  GNU/LinuxThreads restart signal
 123    SIGLTHRCAN : constant := 38; --  GNU/LinuxThreads cancel signal
 124    SIGLTHRDBG : constant := 39; --  GNU/LinuxThreads debugger signal
 125
 126    SIGADAABORT : constant := SIGABRT;
 127    --  Change this if you want to use another signal for task abort.
 128    --  SIGTERM might be a good one.
 129
 130    type Signal_Set is array (Natural range <>) of Signal;
 131
 132    Unmasked    : constant Signal_Set := (
 133       SIGTRAP,
 134       --  To enable debugging on multithreaded applications, mark SIGTRAP to
 135       --  be kept unmasked.
 136
 137       SIGBUS,
 138
 139       SIGTTIN, SIGTTOU, SIGTSTP,
 140       --  Keep these three signals unmasked so that background processes
 141       --  and IO behaves as normal "C" applications
 142
 143       SIGPROF,
 144       --  To avoid confusing the profiler
 145
 146       SIGKILL, SIGSTOP,
 147       --  These two signals actually cannot be masked;
 148       --  POSIX simply won't allow it.
 149
 150       SIGLTHRRES, SIGLTHRCAN, SIGLTHRDBG);
 151       --  These three signals are used by GNU/LinuxThreads starting from
 152       --  glibc 2.1 (future 2.2).
 153
 154    Reserved    : constant Signal_Set :=
 155    --  I am not sure why the following two signals are reserved.
 156    --  I guess they are not supported by this version of GNU/Linux.
 157      (SIGVTALRM, SIGUNUSED);
 158
 159    type sigset_t is private;
 160
 161    function sigaddset (set : access sigset_t; sig : Signal) return int;
 162    pragma Import (C, sigaddset, "sigaddset");
 163
 164    function sigdelset (set : access sigset_t; sig : Signal) return int;
 165    pragma Import (C, sigdelset, "sigdelset");
 166
 167    function sigfillset (set : access sigset_t) return int;
 168    pragma Import (C, sigfillset, "sigfillset");
 169
 170    function sigismember (set : access sigset_t; sig : Signal) return int;
 171    pragma Import (C, sigismember, "sigismember");
 172
 173    function sigemptyset (set : access sigset_t) return int;
 174    pragma Import (C, sigemptyset, "sigemptyset");
 175
 176    type union_type_3 is new String (1 .. 116);
 177    type siginfo_t is record
 178       si_signo : int;
 179       si_code  : int;
 180       si_errno : int;
 181       X_data   : union_type_3;
 182    end record;
 183    pragma Convention (C, siginfo_t);
 184
 185    type struct_sigaction is record
 186       sa_handler   : System.Address;
 187       sa_flags     : unsigned_long;
 188       sa_mask      : sigset_t;
 189    end record;
 190    pragma Convention (C, struct_sigaction);
 191    type struct_sigaction_ptr is access all struct_sigaction;
 192
 193    type Machine_State is record
 194       eip : unsigned_long;
 195       ebx : unsigned_long;
 196       esp : unsigned_long;
 197       ebp : unsigned_long;
 198       esi : unsigned_long;
 199       edi : unsigned_long;
 200    end record;
 201    type Machine_State_Ptr is access all Machine_State;
 202
 203    SA_SIGINFO  : constant := 16;
 204
 205    SIG_BLOCK   : constant := 0;
 206    SIG_UNBLOCK : constant := 1;
 207    SIG_SETMASK : constant := 2;
 208
 209    SIG_DFL : constant := 0;
 210    SIG_IGN : constant := 1;
 211
 212    function sigaction
 213      (sig  : Signal;
 214       act  : struct_sigaction_ptr;
 215       oact : struct_sigaction_ptr) return int;
 216    pragma Import (C, sigaction, "sigaction");
 217
 218    ----------
 219    -- Time --
 220    ----------
 221
 222    type timespec is private;
 223
 224    function To_Duration (TS : timespec) return Duration;
 225    pragma Inline (To_Duration);
 226
 227    function To_Timespec (D : Duration) return timespec;
 228    pragma Inline (To_Timespec);
 229
 230    type struct_timeval is private;
 231
 232    function To_Duration (TV : struct_timeval) return Duration;
 233    pragma Inline (To_Duration);
 234
 235    function To_Timeval (D : Duration) return struct_timeval;
 236    pragma Inline (To_Timeval);
 237
 238    function gettimeofday
 239      (tv : access struct_timeval;
 240       tz : System.Address := System.Null_Address) return int;
 241    pragma Import (C, gettimeofday, "gettimeofday");
 242
 243    function sysconf (name : int) return long;
 244    pragma Import (C, sysconf);
 245
 246    SC_CLK_TCK : constant := 2;
 247
 248    -------------------------
 249    -- Priority Scheduling --
 250    -------------------------
 251
 252    SCHED_OTHER : constant := 0;
 253    SCHED_FIFO  : constant := 1;
 254    SCHED_RR    : constant := 2;
 255
 256    function To_Target_Priority
 257      (Prio : System.Any_Priority) return Interfaces.C.int;
 258    --  Maps System.Any_Priority to a POSIX priority.
 259
 260    -------------
 261    -- Process --
 262    -------------
 263
 264    type pid_t is private;
 265
 266    function kill (pid : pid_t; sig : Signal) return int;
 267    pragma Import (C, kill, "kill");
 268
 269    function getpid return pid_t;
 270    pragma Import (C, getpid, "getpid");
 271
 272    -------------
 273    -- Threads --
 274    -------------
 275
 276    type Thread_Body is access
 277      function (arg : System.Address) return System.Address;
 278
 279    function Thread_Body_Access is new
 280      Ada.Unchecked_Conversion (System.Address, Thread_Body);
 281
 282    type pthread_t is new unsigned_long;
 283    subtype Thread_Id        is pthread_t;
 284
 285    function To_pthread_t is new Ada.Unchecked_Conversion
 286      (unsigned_long, pthread_t);
 287
 288    type pthread_mutex_t     is limited private;
 289    type pthread_cond_t      is limited private;
 290    type pthread_attr_t      is limited private;
 291    type pthread_mutexattr_t is limited private;
 292    type pthread_condattr_t  is limited private;
 293    type pthread_key_t       is private;
 294
 295    PTHREAD_CREATE_DETACHED : constant := 1;
 296
 297    -----------
 298    -- Stack --
 299    -----------
 300
 301    function Get_Stack_Base (thread : pthread_t) return Address;
 302    pragma Inline (Get_Stack_Base);
 303    --  This is a dummy procedure to share some GNULLI files
 304
 305    ---------------------------------------
 306    -- Nonstandard Thread Initialization --
 307    ---------------------------------------
 308
 309    procedure pthread_init;
 310    pragma Inline (pthread_init);
 311    --  This is a dummy procedure to share some GNULLI files
 312
 313    -------------------------
 314    -- POSIX.1c  Section 3 --
 315    -------------------------
 316
 317    function sigwait (set : access sigset_t; sig : access Signal) return int;
 318    pragma Import (C, sigwait, "sigwait");
 319
 320    function pthread_kill (thread : pthread_t; sig : Signal) return int;
 321    pragma Import (C, pthread_kill, "pthread_kill");
 322
 323    function pthread_sigmask
 324      (how  : int;
 325       set  : access sigset_t;
 326       oset : access sigset_t) return int;
 327    pragma Import (C, pthread_sigmask, "pthread_sigmask");
 328
 329    --------------------------
 330    -- POSIX.1c  Section 11 --
 331    --------------------------
 332
 333    function pthread_mutexattr_init
 334      (attr : access pthread_mutexattr_t) return int;
 335    pragma Import (C, pthread_mutexattr_init, "pthread_mutexattr_init");
 336
 337    function pthread_mutexattr_destroy
 338      (attr : access pthread_mutexattr_t) return int;
 339    pragma Import (C, pthread_mutexattr_destroy, "pthread_mutexattr_destroy");
 340
 341    function pthread_mutex_init
 342      (mutex : access pthread_mutex_t;
 343       attr  : access pthread_mutexattr_t) return int;
 344    pragma Import (C, pthread_mutex_init, "pthread_mutex_init");
 345
 346    function pthread_mutex_destroy (mutex : access pthread_mutex_t) return int;
 347    pragma Import (C, pthread_mutex_destroy, "pthread_mutex_destroy");
 348
 349    function pthread_mutex_lock (mutex : access pthread_mutex_t) return int;
 350    pragma Import (C, pthread_mutex_lock, "pthread_mutex_lock");
 351
 352    function pthread_mutex_unlock (mutex : access pthread_mutex_t) return int;
 353    pragma Import (C, pthread_mutex_unlock, "pthread_mutex_unlock");
 354
 355    function pthread_condattr_init
 356      (attr : access pthread_condattr_t) return int;
 357    pragma Import (C, pthread_condattr_init, "pthread_condattr_init");
 358
 359    function pthread_condattr_destroy
 360      (attr : access pthread_condattr_t) return int;
 361    pragma Import (C, pthread_condattr_destroy, "pthread_condattr_destroy");
 362
 363    function pthread_cond_init
 364      (cond : access pthread_cond_t;
 365       attr : access pthread_condattr_t) return int;
 366    pragma Import (C, pthread_cond_init, "pthread_cond_init");
 367
 368    function pthread_cond_destroy (cond : access pthread_cond_t) return int;
 369    pragma Import (C, pthread_cond_destroy, "pthread_cond_destroy");
 370
 371    function pthread_cond_signal (cond : access pthread_cond_t) return int;
 372    pragma Import (C, pthread_cond_signal, "pthread_cond_signal");
 373
 374    function pthread_cond_wait
 375      (cond  : access pthread_cond_t;
 376       mutex : access pthread_mutex_t) return int;
 377    pragma Import (C, pthread_cond_wait, "pthread_cond_wait");
 378
 379    function pthread_cond_timedwait
 380      (cond    : access pthread_cond_t;
 381       mutex   : access pthread_mutex_t;
 382       abstime : access timespec) return int;
 383    pragma Import (C, pthread_cond_timedwait, "pthread_cond_timedwait");
 384
 385    --------------------------
 386    -- POSIX.1c  Section 13 --
 387    --------------------------
 388
 389    type struct_sched_param is record
 390       sched_priority : int;  --  scheduling priority
 391    end record;
 392    pragma Convention (C, struct_sched_param);
 393
 394    function pthread_setschedparam
 395      (thread : pthread_t;
 396       policy : int;
 397       param  : access struct_sched_param) return int;
 398    pragma Import (C, pthread_setschedparam, "pthread_setschedparam");
 399
 400    function pthread_attr_setschedpolicy
 401      (attr   : access pthread_attr_t;
 402       policy : int) return int;
 403    pragma Import
 404      (C, pthread_attr_setschedpolicy, "pthread_attr_setschedpolicy");
 405
 406    function sched_yield return int;
 407    pragma Import (C, sched_yield, "sched_yield");
 408
 409    ---------------------------
 410    -- P1003.1c - Section 16 --
 411    ---------------------------
 412
 413    function pthread_attr_init
 414      (attributes : access pthread_attr_t) return int;
 415    pragma Import (C, pthread_attr_init, "pthread_attr_init");
 416
 417    function pthread_attr_destroy
 418      (attributes : access pthread_attr_t) return int;
 419    pragma Import (C, pthread_attr_destroy, "pthread_attr_destroy");
 420
 421    function pthread_attr_setdetachstate
 422      (attr        : access pthread_attr_t;
 423       detachstate : int) return int;
 424    pragma Import
 425      (C, pthread_attr_setdetachstate, "pthread_attr_setdetachstate");
 426
 427    function pthread_attr_setstacksize
 428      (attr      : access pthread_attr_t;
 429       stacksize : size_t) return int;
 430    pragma Import (C, pthread_attr_setstacksize, "pthread_attr_setstacksize");
 431
 432    function pthread_create
 433      (thread        : access pthread_t;
 434       attributes    : access pthread_attr_t;
 435       start_routine : Thread_Body;
 436       arg           : System.Address) return int;
 437    pragma Import (C, pthread_create, "pthread_create");
 438
 439    procedure pthread_exit (status : System.Address);
 440    pragma Import (C, pthread_exit, "pthread_exit");
 441
 442    function pthread_self return pthread_t;
 443    pragma Import (C, pthread_self, "pthread_self");
 444
 445    --------------------------
 446    -- POSIX.1c  Section 17 --
 447    --------------------------
 448
 449    function pthread_setspecific
 450      (key   : pthread_key_t;
 451       value : System.Address) return int;
 452    pragma Import (C, pthread_setspecific, "pthread_setspecific");
 453
 454    function pthread_getspecific (key : pthread_key_t) return System.Address;
 455    pragma Import (C, pthread_getspecific, "pthread_getspecific");
 456
 457    type destructor_pointer is access procedure (arg : System.Address);
 458
 459    function pthread_key_create
 460      (key        : access pthread_key_t;
 461       destructor : destructor_pointer) return int;
 462    pragma Import (C, pthread_key_create, "pthread_key_create");
 463
 464 private
 465
 466    type sigset_t is array (0 .. 31) of unsigned_long;
 467    pragma Convention (C, sigset_t);
 468
 469    type pid_t is new int;
 470
 471    type time_t is new long;
 472
 473    type timespec is record
 474       tv_sec  : time_t;
 475       tv_nsec : long;
 476    end record;
 477    pragma Convention (C, timespec);
 478
 479    type struct_timeval is record
 480       tv_sec  : time_t;
 481       tv_usec : time_t;
 482    end record;
 483    pragma Convention (C, struct_timeval);
 484
 485    type pthread_attr_t is record
 486       detachstate   : int;
 487       schedpolicy   : int;
 488       schedparam    : struct_sched_param;
 489       inheritsched  : int;
 490       scope         : int;
 491       guardsize     : size_t;
 492       stackaddr_set : int;
 493       stackaddr     : System.Address;
 494       stacksize     : size_t;
 495    end record;
 496    pragma Convention (C, pthread_attr_t);
 497
 498    type pthread_condattr_t is record
 499       dummy : int;
 500    end record;
 501    pragma Convention (C, pthread_condattr_t);
 502
 503    type pthread_mutexattr_t is record
 504       mutexkind : int;
 505    end record;
 506    pragma Convention (C, pthread_mutexattr_t);
 507
 508    type lock_array is array (1 .. 4) of int;
 509    type atomic_lock_t is record
 510       lock : lock_array;
 511    end record;
 512    pragma Convention (C, atomic_lock_t);
 513    --  ??? Alignment should be 16 but this is larger than BIGGEST_ALIGNMENT.
 514    --  This causes an erroneous pointer value to sometimes be passed to free
 515    --  during deallocation.  See PR ada/24533 for more details.
 516    for atomic_lock_t'Alignment use 8;
 517
 518    type struct_pthread_fast_lock is record
 519       spinlock : atomic_lock_t;
 520       status   : long;
 521    end record;
 522    pragma Convention (C, struct_pthread_fast_lock);
 523
 524    type pthread_mutex_t is record
 525       m_reserved : int;
 526       m_count    : int;
 527       m_owner    : System.Address;
 528       m_kind     : int;
 529       m_lock     : struct_pthread_fast_lock;
 530    end record;
 531    pragma Convention (C, pthread_mutex_t);
 532
 533    type pthread_cond_t is array (0 .. 47) of unsigned_char;
 534    pragma Convention (C, pthread_cond_t);
 535
 536    type pthread_key_t is new unsigned;
 537
 538 end System.OS_Interface;