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) 1995-2008, 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 that are
  39 --  needed by the tasking run-time (libgnarl).
  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 Ada.Unchecked_Conversion;
  45
  46 with Interfaces.C;
  47
  48 package System.OS_Interface is
  49    pragma Preelaborate;
  50
  51    pragma Linker_Options ("-lpthread");
  52
  53    subtype int            is Interfaces.C.int;
  54    subtype char           is Interfaces.C.char;
  55    subtype short          is Interfaces.C.short;
  56    subtype long           is Interfaces.C.long;
  57    subtype unsigned       is Interfaces.C.unsigned;
  58    subtype unsigned_short is Interfaces.C.unsigned_short;
  59    subtype unsigned_long  is Interfaces.C.unsigned_long;
  60    subtype unsigned_char  is Interfaces.C.unsigned_char;
  61    subtype plain_char     is Interfaces.C.plain_char;
  62    subtype size_t         is Interfaces.C.size_t;
  63
  64    -----------
  65    -- Errno --
  66    -----------
  67
  68    function errno return int;
  69    pragma Import (C, errno, "__get_errno");
  70
  71    EAGAIN    : constant := 11;
  72    EINTR     : constant := 4;
  73    EINVAL    : constant := 22;
  74    ENOMEM    : constant := 12;
  75    EPERM     : constant := 1;
  76    ETIMEDOUT : constant := 238;
  77
  78    -------------
  79    -- Signals --
  80    -------------
  81
  82    Max_Interrupt : constant := 63;
  83    type Signal is new int range 0 .. Max_Interrupt;
  84    for Signal'Size use int'Size;
  85
  86    SIGHUP     : constant := 1; --  hangup
  87    SIGINT     : constant := 2; --  interrupt (rubout)
  88    SIGQUIT    : constant := 3; --  quit (ASCD FS)
  89    SIGILL     : constant := 4; --  illegal instruction (not reset)
  90    SIGTRAP    : constant := 5; --  trace trap (not reset)
  91    SIGIOT     : constant := 6; --  IOT instruction
  92    SIGABRT    : constant := 6; --  used by abort, replace SIGIOT in the  future
  93    SIGEMT     : constant := 7; --  EMT
  94    SIGFPE     : constant := 8; --  floating point exception
  95    SIGKILL    : constant := 9; --  kill (cannot be caught or ignored)
  96    SIGBUS     : constant := 10; --  bus error
  97    SIGSEGV    : constant := 11; --  segmentation violation
  98    SIGSYS     : constant := 12; --  bad system call
  99    SIGPIPE    : constant := 13; --  write on a pipe with no one to read it
 100    SIGALRM    : constant := 14; --  alarm clock
 101    SIGTERM    : constant := 15; --  software termination signal from kill
 102    SIGUSR1    : constant := 16; --  user defined signal 1
 103    SIGUSR2    : constant := 17; --  user defined signal 2
 104    SIGCLD     : constant := 18; --  alias for SIGCHLD
 105    SIGCHLD    : constant := 18; --  child status change
 106    SIGPWR     : constant := 19; --  power-fail restart
 107    SIGVTALRM  : constant := 20; --  virtual timer expired
 108    SIGPROF    : constant := 21; --  profiling timer expired
 109    SIGPOLL    : constant := 22; --  pollable event occurred
 110    SIGIO      : constant := 22; --  I/O now possible (4.2 BSD)
 111    SIGWINCH   : constant := 23; --  window size change
 112    SIGSTOP    : constant := 24; --  stop (cannot be caught or ignored)
 113    SIGTSTP    : constant := 25; --  user stop requested from tty
 114    SIGCONT    : constant := 26; --  stopped process has been continued
 115    SIGTTIN    : constant := 27; --  background tty read attempted
 116    SIGTTOU    : constant := 28; --  background tty write attempted
 117    SIGURG     : constant := 29; --  urgent condition on IO channel
 118    SIGLOST    : constant := 30; --  File lock lost
 119    SIGUNUSED  : constant := 31; --  unused signal (GNU/Linux)
 120    SIGXCPU    : constant := 33; --  CPU time limit exceeded
 121    SIGXFSZ    : constant := 34; --  filesize limit exceeded
 122    SIGSTKFLT  : constant := 36; --  coprocessor stack fault (Linux)
 123    SIGLTHRRES : constant := 37; --  GNU/LinuxThreads restart signal
 124    SIGLTHRCAN : constant := 38; --  GNU/LinuxThreads cancel signal
 125    SIGLTHRDBG : constant := 39; --  GNU/LinuxThreads debugger signal
 126
 127    SIGADAABORT : constant := SIGABRT;
 128    --  Change this if you want to use another signal for task abort.
 129    --  SIGTERM might be a good one.
 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 :=
 156    --  I am not sure why the following two signals are reserved.
 157    --  I guess they are not supported by this version of GNU/Linux.
 158      (SIGVTALRM, SIGUNUSED);
 159
 160    type sigset_t is private;
 161
 162    function sigaddset (set : access sigset_t; sig : Signal) return int;
 163    pragma Import (C, sigaddset, "sigaddset");
 164
 165    function sigdelset (set : access sigset_t; sig : Signal) return int;
 166    pragma Import (C, sigdelset, "sigdelset");
 167
 168    function sigfillset (set : access sigset_t) return int;
 169    pragma Import (C, sigfillset, "sigfillset");
 170
 171    function sigismember (set : access sigset_t; sig : Signal) return int;
 172    pragma Import (C, sigismember, "sigismember");
 173
 174    function sigemptyset (set : access sigset_t) return int;
 175    pragma Import (C, sigemptyset, "sigemptyset");
 176
 177    type union_type_3 is new String (1 .. 116);
 178    type siginfo_t is record
 179       si_signo : int;
 180       si_code  : int;
 181       si_errno : int;
 182       X_data   : union_type_3;
 183    end record;
 184    pragma Convention (C, siginfo_t);
 185
 186    type struct_sigaction is record
 187       sa_handler   : System.Address;
 188       sa_flags     : unsigned_long;
 189       sa_mask      : sigset_t;
 190    end record;
 191    pragma Convention (C, struct_sigaction);
 192    type struct_sigaction_ptr is access all struct_sigaction;
 193
 194    type Machine_State is record
 195       eip : unsigned_long;
 196       ebx : unsigned_long;
 197       esp : unsigned_long;
 198       ebp : unsigned_long;
 199       esi : unsigned_long;
 200       edi : unsigned_long;
 201    end record;
 202    type Machine_State_Ptr is access all Machine_State;
 203
 204    SA_SIGINFO  : constant := 16;
 205
 206    SIG_BLOCK   : constant := 0;
 207    SIG_UNBLOCK : constant := 1;
 208    SIG_SETMASK : constant := 2;
 209
 210    SIG_DFL : constant := 0;
 211    SIG_IGN : constant := 1;
 212
 213    function sigaction
 214      (sig  : Signal;
 215       act  : struct_sigaction_ptr;
 216       oact : struct_sigaction_ptr) return int;
 217    pragma Import (C, sigaction, "sigaction");
 218
 219    ----------
 220    -- Time --
 221    ----------
 222
 223    type timespec is private;
 224
 225    function To_Duration (TS : timespec) return Duration;
 226    pragma Inline (To_Duration);
 227
 228    function To_Timespec (D : Duration) return timespec;
 229    pragma Inline (To_Timespec);
 230
 231    type struct_timeval is private;
 232
 233    function To_Duration (TV : struct_timeval) return Duration;
 234    pragma Inline (To_Duration);
 235
 236    function To_Timeval (D : Duration) return struct_timeval;
 237    pragma Inline (To_Timeval);
 238
 239    function gettimeofday
 240      (tv : access struct_timeval;
 241       tz : System.Address := System.Null_Address) return int;
 242    pragma Import (C, gettimeofday, "gettimeofday");
 243
 244    function sysconf (name : int) return long;
 245    pragma Import (C, sysconf);
 246
 247    SC_CLK_TCK : constant := 2;
 248    SC_NPROCESSORS_ONLN : constant := 84;
 249
 250    -------------------------
 251    -- Priority Scheduling --
 252    -------------------------
 253
 254    SCHED_OTHER : constant := 0;
 255    SCHED_FIFO  : constant := 1;
 256    SCHED_RR    : constant := 2;
 257
 258    function To_Target_Priority
 259      (Prio : System.Any_Priority) return Interfaces.C.int;
 260    --  Maps System.Any_Priority to a POSIX priority
 261
 262    -------------
 263    -- Process --
 264    -------------
 265
 266    type pid_t is private;
 267
 268    function kill (pid : pid_t; sig : Signal) return int;
 269    pragma Import (C, kill, "kill");
 270
 271    function getpid return pid_t;
 272    pragma Import (C, getpid, "getpid");
 273
 274    -------------
 275    -- Threads --
 276    -------------
 277
 278    type Thread_Body is access
 279      function (arg : System.Address) return System.Address;
 280    pragma Convention (C, Thread_Body);
 281
 282    function Thread_Body_Access is new
 283      Ada.Unchecked_Conversion (System.Address, Thread_Body);
 284
 285    type pthread_t is new unsigned_long;
 286    subtype Thread_Id        is pthread_t;
 287
 288    function To_pthread_t is new Ada.Unchecked_Conversion
 289      (unsigned_long, pthread_t);
 290
 291    type pthread_mutex_t     is limited private;
 292    type pthread_cond_t      is limited private;
 293    type pthread_attr_t      is limited private;
 294    type pthread_mutexattr_t is limited private;
 295    type pthread_condattr_t  is limited private;
 296    type pthread_key_t       is private;
 297
 298    PTHREAD_CREATE_DETACHED : constant := 1;
 299
 300    -----------
 301    -- Stack --
 302    -----------
 303
 304    function Get_Stack_Base (thread : pthread_t) return Address;
 305    pragma Inline (Get_Stack_Base);
 306    --  This is a dummy procedure to share some GNULLI files
 307
 308    ---------------------------------------
 309    -- Nonstandard Thread Initialization --
 310    ---------------------------------------
 311
 312    procedure pthread_init;
 313    pragma Inline (pthread_init);
 314    --  This is a dummy procedure to share some GNULLI files
 315
 316    -------------------------
 317    -- POSIX.1c  Section 3 --
 318    -------------------------
 319
 320    function sigwait (set : access sigset_t; sig : access Signal) return int;
 321    pragma Import (C, sigwait, "sigwait");
 322
 323    function pthread_kill (thread : pthread_t; sig : Signal) return int;
 324    pragma Import (C, pthread_kill, "pthread_kill");
 325
 326    function pthread_sigmask
 327      (how  : int;
 328       set  : access sigset_t;
 329       oset : access sigset_t) return int;
 330    pragma Import (C, pthread_sigmask, "pthread_sigmask");
 331
 332    --------------------------
 333    -- POSIX.1c  Section 11 --
 334    --------------------------
 335
 336    function pthread_mutexattr_init
 337      (attr : access pthread_mutexattr_t) return int;
 338    pragma Import (C, pthread_mutexattr_init, "pthread_mutexattr_init");
 339
 340    function pthread_mutexattr_destroy
 341      (attr : access pthread_mutexattr_t) return int;
 342    pragma Import (C, pthread_mutexattr_destroy, "pthread_mutexattr_destroy");
 343
 344    function pthread_mutex_init
 345      (mutex : access pthread_mutex_t;
 346       attr  : access pthread_mutexattr_t) return int;
 347    pragma Import (C, pthread_mutex_init, "pthread_mutex_init");
 348
 349    function pthread_mutex_destroy (mutex : access pthread_mutex_t) return int;
 350    pragma Import (C, pthread_mutex_destroy, "pthread_mutex_destroy");
 351
 352    function pthread_mutex_lock (mutex : access pthread_mutex_t) return int;
 353    pragma Import (C, pthread_mutex_lock, "pthread_mutex_lock");
 354
 355    function pthread_mutex_unlock (mutex : access pthread_mutex_t) return int;
 356    pragma Import (C, pthread_mutex_unlock, "pthread_mutex_unlock");
 357
 358    function pthread_condattr_init
 359      (attr : access pthread_condattr_t) return int;
 360    pragma Import (C, pthread_condattr_init, "pthread_condattr_init");
 361
 362    function pthread_condattr_destroy
 363      (attr : access pthread_condattr_t) return int;
 364    pragma Import (C, pthread_condattr_destroy, "pthread_condattr_destroy");
 365
 366    function pthread_cond_init
 367      (cond : access pthread_cond_t;
 368       attr : access pthread_condattr_t) return int;
 369    pragma Import (C, pthread_cond_init, "pthread_cond_init");
 370
 371    function pthread_cond_destroy (cond : access pthread_cond_t) return int;
 372    pragma Import (C, pthread_cond_destroy, "pthread_cond_destroy");
 373
 374    function pthread_cond_signal (cond : access pthread_cond_t) return int;
 375    pragma Import (C, pthread_cond_signal, "pthread_cond_signal");
 376
 377    function pthread_cond_wait
 378      (cond  : access pthread_cond_t;
 379       mutex : access pthread_mutex_t) return int;
 380    pragma Import (C, pthread_cond_wait, "pthread_cond_wait");
 381
 382    function pthread_cond_timedwait
 383      (cond    : access pthread_cond_t;
 384       mutex   : access pthread_mutex_t;
 385       abstime : access timespec) return int;
 386    pragma Import (C, pthread_cond_timedwait, "pthread_cond_timedwait");
 387
 388    --------------------------
 389    -- POSIX.1c  Section 13 --
 390    --------------------------
 391
 392    type struct_sched_param is record
 393       sched_priority : int;  --  scheduling priority
 394    end record;
 395    pragma Convention (C, struct_sched_param);
 396
 397    function pthread_setschedparam
 398      (thread : pthread_t;
 399       policy : int;
 400       param  : access struct_sched_param) return int;
 401    pragma Import (C, pthread_setschedparam, "pthread_setschedparam");
 402
 403    function pthread_attr_setschedpolicy
 404      (attr   : access pthread_attr_t;
 405       policy : int) return int;
 406    pragma Import
 407      (C, pthread_attr_setschedpolicy, "pthread_attr_setschedpolicy");
 408
 409    function sched_yield return int;
 410    pragma Import (C, sched_yield, "sched_yield");
 411
 412    ---------------------------
 413    -- P1003.1c - Section 16 --
 414    ---------------------------
 415
 416    function pthread_attr_init
 417      (attributes : access pthread_attr_t) return int;
 418    pragma Import (C, pthread_attr_init, "pthread_attr_init");
 419
 420    function pthread_attr_destroy
 421      (attributes : access pthread_attr_t) return int;
 422    pragma Import (C, pthread_attr_destroy, "pthread_attr_destroy");
 423
 424    function pthread_attr_setdetachstate
 425      (attr        : access pthread_attr_t;
 426       detachstate : int) return int;
 427    pragma Import
 428      (C, pthread_attr_setdetachstate, "pthread_attr_setdetachstate");
 429
 430    function pthread_attr_setstacksize
 431      (attr      : access pthread_attr_t;
 432       stacksize : size_t) return int;
 433    pragma Import (C, pthread_attr_setstacksize, "pthread_attr_setstacksize");
 434
 435    function pthread_create
 436      (thread        : access pthread_t;
 437       attributes    : access pthread_attr_t;
 438       start_routine : Thread_Body;
 439       arg           : System.Address) return int;
 440    pragma Import (C, pthread_create, "pthread_create");
 441
 442    procedure pthread_exit (status : System.Address);
 443    pragma Import (C, pthread_exit, "pthread_exit");
 444
 445    function pthread_self return pthread_t;
 446    pragma Import (C, pthread_self, "pthread_self");
 447
 448    --------------------------
 449    -- POSIX.1c  Section 17 --
 450    --------------------------
 451
 452    function pthread_setspecific
 453      (key   : pthread_key_t;
 454       value : System.Address) return int;
 455    pragma Import (C, pthread_setspecific, "pthread_setspecific");
 456
 457    function pthread_getspecific (key : pthread_key_t) return System.Address;
 458    pragma Import (C, pthread_getspecific, "pthread_getspecific");
 459
 460    type destructor_pointer is access procedure (arg : System.Address);
 461    pragma Convention (C, destructor_pointer);
 462
 463    function pthread_key_create
 464      (key        : access pthread_key_t;
 465       destructor : destructor_pointer) return int;
 466    pragma Import (C, pthread_key_create, "pthread_key_create");
 467
 468    CPU_SETSIZE : constant := 1_024;
 469
 470    type bit_field is array (1 .. CPU_SETSIZE) of Boolean;
 471    for bit_field'Size use CPU_SETSIZE;
 472    pragma Pack (bit_field);
 473    pragma Convention (C, bit_field);
 474
 475    type cpu_set_t is record
 476       bits : bit_field;
 477    end record;
 478    pragma Convention (C, cpu_set_t);
 479
 480    function pthread_setaffinity_np
 481      (thread     : pthread_t;
 482       cpusetsize : size_t;
 483       cpuset     : access cpu_set_t) return int;
 484    pragma Import (C, pthread_setaffinity_np, "__gnat_pthread_setaffinity_np");
 485
 486 private
 487
 488    type sigset_t is array (0 .. 31) of unsigned_long;
 489    pragma Convention (C, sigset_t);
 490
 491    type pid_t is new int;
 492
 493    type time_t is new long;
 494
 495    type timespec is record
 496       tv_sec  : time_t;
 497       tv_nsec : long;
 498    end record;
 499    pragma Convention (C, timespec);
 500
 501    type struct_timeval is record
 502       tv_sec  : time_t;
 503       tv_usec : time_t;
 504    end record;
 505    pragma Convention (C, struct_timeval);
 506
 507    type pthread_attr_t is record
 508       detachstate   : int;
 509       schedpolicy   : int;
 510       schedparam    : struct_sched_param;
 511       inheritsched  : int;
 512       scope         : int;
 513       guardsize     : size_t;
 514       stackaddr_set : int;
 515       stackaddr     : System.Address;
 516       stacksize     : size_t;
 517    end record;
 518    pragma Convention (C, pthread_attr_t);
 519
 520    type pthread_condattr_t is record
 521       dummy : int;
 522    end record;
 523    pragma Convention (C, pthread_condattr_t);
 524
 525    type pthread_mutexattr_t is record
 526       mutexkind : int;
 527    end record;
 528    pragma Convention (C, pthread_mutexattr_t);
 529
 530    type lock_array is array (1 .. 4) of int;
 531    type atomic_lock_t is record
 532       lock : lock_array;
 533    end record;
 534    pragma Convention (C, atomic_lock_t);
 535    --  ??? Alignment should be 16 but this is larger than BIGGEST_ALIGNMENT.
 536    --  This causes an erroneous pointer value to sometimes be passed to free
 537    --  during deallocation.  See PR ada/24533 for more details.
 538    for atomic_lock_t'Alignment use 8;
 539
 540    type struct_pthread_fast_lock is record
 541       spinlock : atomic_lock_t;
 542       status   : long;
 543    end record;
 544    pragma Convention (C, struct_pthread_fast_lock);
 545
 546    type pthread_mutex_t is record
 547       m_reserved : int;
 548       m_count    : int;
 549       m_owner    : System.Address;
 550       m_kind     : int;
 551       m_lock     : struct_pthread_fast_lock;
 552    end record;
 553    pragma Convention (C, pthread_mutex_t);
 554
 555    type pthread_cond_t is array (0 .. 47) of unsigned_char;
 556    pragma Convention (C, pthread_cond_t);
 557
 558    type pthread_key_t is new unsigned;
 559
 560 end System.OS_Interface;