gcc/ada/51osinte.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 --                                                                          --
  10 --          Copyright (C) 1999-2001 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,  59 Temple Place - Suite 330,  Boston, --
  21 -- MA 02111-1307, 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 UnixWare (Native THREADS) 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
  41 --  or remove the pragma Elaborate_Body.
  42 --  It is designed to be a bottom-level (leaf) package.
  43
  44 with Interfaces.C;
  45 package System.OS_Interface is
  46    pragma Preelaborate;
  47
  48    pragma Linker_Options ("-lthread");
  49
  50    subtype int            is Interfaces.C.int;
  51    subtype char           is Interfaces.C.char;
  52    subtype short          is Interfaces.C.short;
  53    subtype long           is Interfaces.C.long;
  54    subtype unsigned       is Interfaces.C.unsigned;
  55    subtype unsigned_short is Interfaces.C.unsigned_short;
  56    subtype unsigned_long  is Interfaces.C.unsigned_long;
  57    subtype unsigned_char  is Interfaces.C.unsigned_char;
  58    subtype plain_char     is Interfaces.C.plain_char;
  59    subtype size_t         is Interfaces.C.size_t;
  60
  61    -----------
  62    -- Errno --
  63    -----------
  64
  65    function errno return int;
  66    pragma Import (C, errno, "__get_errno");
  67
  68    EAGAIN    : constant := 11;
  69    EINTR     : constant := 4;
  70    EINVAL    : constant := 22;
  71    ENOMEM    : constant := 12;
  72    ETIMEDOUT : constant := 145;
  73
  74    -------------
  75    -- Signals --
  76    -------------
  77
  78    Max_Interrupt : constant := 34;
  79    type Signal is new int range 0 .. Max_Interrupt;
  80    for Signal'Size use int'Size;
  81
  82    SIGHUP      : constant := 1; --  hangup
  83    SIGINT      : constant := 2; --  interrupt (rubout)
  84    SIGQUIT     : constant := 3; --  quit (ASCD FS)
  85    SIGILL      : constant := 4; --  illegal instruction (not reset)
  86    SIGTRAP     : constant := 5; --  trace trap (not reset)
  87    SIGIOT      : constant := 6; --  IOT instruction
  88    SIGABRT     : constant := 6; --  used by abort, replace SIGIOT in the future
  89    SIGEMT      : constant := 7; --  EMT instruction
  90    SIGFPE      : constant := 8; --  floating point exception
  91    SIGKILL     : constant := 9; --  kill (cannot be caught or ignored)
  92    SIGBUS      : constant := 10; --  bus error
  93    SIGSEGV     : constant := 11; --  segmentation violation
  94    SIGSYS      : constant := 12; --  bad argument to system call
  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 := 16; --  user defined signal 1
  99    SIGUSR2     : constant := 17; --  user defined signal 2
 100    SIGCLD      : constant := 18; --  alias for SIGCHLD
 101    SIGCHLD     : constant := 18; --  child status change
 102    SIGPWR      : constant := 19; --  power-fail restart
 103    SIGWINCH    : constant := 20; --  window size change
 104    SIGURG      : constant := 21; --  urgent condition on IO channel
 105    SIGPOLL     : constant := 22; --  pollable event occurred
 106    SIGIO       : constant := 22; --  I/O possible (Solaris SIGPOLL alias)
 107    SIGSTOP     : constant := 23; --  stop (cannot be caught or ignored)
 108    SIGTSTP     : constant := 24; --  user stop requested from tty
 109    SIGCONT     : constant := 25; --  stopped process has been continued
 110    SIGTTIN     : constant := 26; --  background tty read attempted
 111    SIGTTOU     : constant := 27; --  background tty write attempted
 112    SIGVTALRM   : constant := 28; --  virtual timer expired
 113    SIGPROF     : constant := 29; --  profiling timer expired
 114    SIGXCPU     : constant := 30; --  CPU time limit exceeded
 115    SIGXFSZ     : constant := 31; --  filesize limit exceeded
 116    SIGWAITING  : constant := 32; --  all LWPs blocked interruptibly notific.
 117    SIGLWP      : constant := 33; --  signal reserved for thread lib impl.
 118    SIGAIO      : constant := 34; --  Asynchronous I/O signal
 119
 120    SIGADAABORT : constant := SIGABRT;
 121    --  Change this if you want to use another signal for task abort.
 122    --  SIGTERM might be a good one.
 123
 124    type Signal_Set is array (Natural range <>) of Signal;
 125
 126    Unmasked    : constant Signal_Set :=
 127      (SIGTRAP, SIGLWP, SIGWAITING, SIGTTIN, SIGTTOU, SIGTSTP, SIGPROF);
 128    Reserved    : constant Signal_Set := (SIGABRT, SIGKILL, SIGSTOP);
 129
 130    type sigset_t is private;
 131
 132    function sigaddset (set : access sigset_t; sig : Signal) return int;
 133    pragma Import (C, sigaddset, "sigaddset");
 134
 135    function sigdelset (set : access sigset_t; sig : Signal) return int;
 136    pragma Import (C, sigdelset, "sigdelset");
 137
 138    function sigfillset (set : access sigset_t) return int;
 139    pragma Import (C, sigfillset, "sigfillset");
 140
 141    function sigismember (set : access sigset_t; sig : Signal) return int;
 142    pragma Import (C, sigismember, "sigismember");
 143
 144    function sigemptyset (set : access sigset_t) return int;
 145    pragma Import (C, sigemptyset, "sigemptyset");
 146
 147    type struct_sigaction is record
 148       sa_flags   : int;
 149       sa_handler : System.Address;
 150       sa_mask    : sigset_t;
 151       sa_resv1   : int;
 152       sa_resv2   : int;
 153    end record;
 154    pragma Convention (C, struct_sigaction);
 155    type struct_sigaction_ptr is access all struct_sigaction;
 156
 157    SIG_BLOCK   : constant := 1;
 158    SIG_UNBLOCK : constant := 2;
 159    SIG_SETMASK : constant := 3;
 160
 161    SIG_DFL : constant := 0;
 162    SIG_IGN : constant := 1;
 163    --  SIG_ERR : constant := -1;
 164    --  not used
 165
 166    function sigaction
 167      (sig  : Signal;
 168       act  : struct_sigaction_ptr;
 169       oact : struct_sigaction_ptr) return int;
 170    pragma Import (C, sigaction, "sigaction");
 171
 172    ----------
 173    -- Time --
 174    ----------
 175
 176    Time_Slice_Supported : constant Boolean := False;
 177    --  Indicates wether time slicing is supported
 178
 179    type timespec is private;
 180
 181    type clockid_t is private;
 182
 183    CLOCK_REALTIME : constant clockid_t;
 184
 185    function clock_gettime
 186      (clock_id : clockid_t;
 187       tp       : access timespec) return int;
 188    --  UnixWare threads don't have clock_gettime
 189    --  We instead use gettimeofday()
 190
 191    function To_Duration (TS : timespec) return Duration;
 192    pragma Inline (To_Duration);
 193
 194    function To_Timespec (D : Duration) return timespec;
 195    pragma Inline (To_Timespec);
 196
 197    type struct_timezone is record
 198       tz_minuteswest : int;
 199       tz_dsttime     : int;
 200    end record;
 201    pragma Convention (C, struct_timezone);
 202    type struct_timezone_ptr is access all struct_timezone;
 203
 204    type struct_timeval is private;
 205    --  This is needed on systems that do not have clock_gettime()
 206    --  but do have gettimeofday().
 207
 208    function To_Duration (TV : struct_timeval) return Duration;
 209    pragma Inline (To_Duration);
 210
 211    function To_Timeval (D : Duration) return struct_timeval;
 212    pragma Inline (To_Timeval);
 213
 214    -------------------------
 215    -- Priority Scheduling --
 216    -------------------------
 217
 218    SCHED_FIFO  : constant := 2;
 219    SCHED_RR    : constant := 3;
 220    SCHED_OTHER : constant := 1;
 221
 222    -------------
 223    -- Process --
 224    -------------
 225
 226    type pid_t is private;
 227
 228    function kill (pid : pid_t; sig : Signal) return int;
 229    pragma Import (C, kill, "kill");
 230
 231    function getpid return pid_t;
 232    pragma Import (C, getpid, "getpid");
 233
 234    ---------
 235    -- LWP --
 236    ---------
 237
 238    function lwp_self return System.Address;
 239    pragma Import (C, lwp_self, "_lwp_self");
 240
 241    -------------
 242    -- Threads --
 243    -------------
 244
 245    type Thread_Body is access
 246      function (arg : System.Address) return System.Address;
 247    type pthread_t           is private;
 248    subtype Thread_Id        is pthread_t;
 249
 250    type pthread_mutex_t     is limited private;
 251    type pthread_cond_t      is limited private;
 252    type pthread_attr_t      is limited private;
 253    type pthread_mutexattr_t is limited private;
 254    type pthread_condattr_t  is limited private;
 255    type pthread_key_t       is private;
 256
 257    PTHREAD_CREATE_DETACHED : constant := 0;
 258
 259    -----------
 260    -- Stack --
 261    -----------
 262
 263    Stack_Base_Available : constant Boolean := False;
 264    --  Indicates wether the stack base is available on this target.
 265
 266    function Get_Stack_Base (thread : pthread_t) return Address;
 267    pragma Inline (Get_Stack_Base);
 268    --  returns the stack base of the specified thread.
 269    --  Only call this function when Stack_Base_Available is True.
 270
 271    function Get_Page_Size return size_t;
 272    function Get_Page_Size return Address;
 273    pragma Import (C, Get_Page_Size, "getpagesize");
 274    --  returns the size of a page, or 0 if this is not relevant on this
 275    --  target
 276
 277    PROT_NONE  : constant := 0;
 278    PROT_READ  : constant := 1;
 279    PROT_WRITE : constant := 2;
 280    PROT_EXEC  : constant := 4;
 281    PROT_USER  : constant := 8;
 282    PROT_ALL   : constant := PROT_READ + PROT_WRITE + PROT_EXEC + PROT_USER;
 283
 284    PROT_ON    : constant := PROT_READ;
 285    PROT_OFF   : constant := PROT_ALL;
 286
 287    function mprotect (addr : Address; len : size_t; prot : int) return int;
 288    pragma Import (C, mprotect);
 289
 290    -------------------------
 291    -- POSIX.1c  Section 3 --
 292    -------------------------
 293
 294    function sigwait (set : access sigset_t; sig : access Signal) return int;
 295    pragma Inline (sigwait);
 296    --  UnixWare provides a non standard sigwait
 297
 298    function pthread_kill (thread : pthread_t; sig : Signal) return int;
 299    pragma Inline (pthread_kill);
 300    --  UnixWare provides a non standard pthread_kill
 301
 302    type sigset_t_ptr is access all sigset_t;
 303
 304    function pthread_sigmask
 305      (how  : int;
 306       set  : sigset_t_ptr;
 307       oset : sigset_t_ptr) return int;
 308    pragma Import (C, pthread_sigmask, "pthread_sigmask");
 309
 310    --------------------------
 311    -- POSIX.1c  Section 11 --
 312    --------------------------
 313
 314    function pthread_mutexattr_init
 315      (attr : access pthread_mutexattr_t) return int;
 316    pragma Import (C, pthread_mutexattr_init, "pthread_mutexattr_init");
 317
 318    function pthread_mutexattr_destroy
 319      (attr : access pthread_mutexattr_t) return int;
 320    pragma Import (C, pthread_mutexattr_destroy, "pthread_mutexattr_destroy");
 321
 322    function pthread_mutex_init
 323      (mutex : access pthread_mutex_t;
 324       attr  : access pthread_mutexattr_t) return int;
 325    pragma Import (C, pthread_mutex_init, "pthread_mutex_init");
 326
 327    function pthread_mutex_destroy (mutex : access pthread_mutex_t) return int;
 328    pragma Import (C, pthread_mutex_destroy, "pthread_mutex_destroy");
 329
 330    function pthread_mutex_lock (mutex : access pthread_mutex_t) return int;
 331    pragma Import (C, pthread_mutex_lock, "pthread_mutex_lock");
 332
 333    function pthread_mutex_unlock (mutex : access pthread_mutex_t) return int;
 334    pragma Import (C, pthread_mutex_unlock, "pthread_mutex_unlock");
 335
 336    function pthread_condattr_init
 337      (attr : access pthread_condattr_t) return int;
 338    pragma Import (C, pthread_condattr_init, "pthread_condattr_init");
 339
 340    function pthread_condattr_destroy
 341      (attr : access pthread_condattr_t) return int;
 342    pragma Import (C, pthread_condattr_destroy, "pthread_condattr_destroy");
 343
 344    function pthread_cond_init
 345      (cond : access pthread_cond_t;
 346       attr : access pthread_condattr_t) return int;
 347    pragma Import (C, pthread_cond_init, "pthread_cond_init");
 348
 349    function pthread_cond_destroy (cond : access pthread_cond_t) return int;
 350    pragma Import (C, pthread_cond_destroy, "pthread_cond_destroy");
 351
 352    function pthread_cond_signal (cond : access pthread_cond_t) return int;
 353    pragma Import (C, pthread_cond_signal, "pthread_cond_signal");
 354
 355    function pthread_cond_wait
 356      (cond  : access pthread_cond_t;
 357       mutex : access pthread_mutex_t) return int;
 358    pragma Import (C, pthread_cond_wait, "pthread_cond_wait");
 359
 360    function pthread_cond_timedwait
 361      (cond    : access pthread_cond_t;
 362       mutex   : access pthread_mutex_t;
 363       abstime : access timespec) return int;
 364    pragma Import (C, pthread_cond_timedwait, "pthread_cond_timedwait");
 365
 366    Relative_Timed_Wait : constant Boolean := False;
 367    --  pthread_cond_timedwait requires an absolute delay time
 368
 369    --------------------------
 370    -- POSIX.1c  Section 13 --
 371    --------------------------
 372
 373    PTHREAD_PRIO_NONE    : constant := 1;
 374    PTHREAD_PRIO_INHERIT : constant := 2;
 375    PTHREAD_PRIO_PROTECT : constant := 3;
 376
 377    function pthread_mutexattr_setprotocol
 378      (attr     : access pthread_mutexattr_t;
 379       protocol : int) return int;
 380    pragma Import (C, pthread_mutexattr_setprotocol);
 381
 382    function pthread_mutexattr_setprioceiling
 383      (attr     : access pthread_mutexattr_t;
 384       prioceiling : int) return int;
 385    pragma Import (C, pthread_mutexattr_setprioceiling);
 386
 387    type sched_union is record
 388       sched_fifo    : int;
 389       sched_fcfs    : int;
 390       sched_other   : int;
 391       sched_ts      : int;
 392       policy_params : long;
 393    end record;
 394
 395    type struct_sched_param is record
 396       sched_priority    : int;
 397       sched_other_stuff : sched_union;
 398    end record;
 399
 400    function pthread_setschedparam
 401      (thread : pthread_t;
 402       policy : int;
 403       param  : access struct_sched_param) return int;
 404    pragma Import (C, pthread_setschedparam, "pthread_setschedparam");
 405
 406    function pthread_attr_setscope
 407      (attr            : access pthread_attr_t;
 408       contentionscope : int) return int;
 409    pragma Import (C, pthread_attr_setscope, "pthread_attr_setscope");
 410
 411    function pthread_attr_setinheritsched
 412      (attr            : access pthread_attr_t;
 413       inheritsched : int) return int;
 414    pragma Import (C, pthread_attr_setinheritsched);
 415
 416    function pthread_attr_setschedpolicy
 417      (attr   : access pthread_attr_t;
 418       policy : int) return int;
 419    pragma Import (C, pthread_attr_setschedpolicy);
 420
 421    function sched_yield return int;
 422    pragma Import (C, sched_yield, "sched_yield");
 423
 424    ---------------------------
 425    -- P1003.1c - Section 16 --
 426    ---------------------------
 427
 428    function pthread_attr_init (attributes : access pthread_attr_t) return int;
 429    pragma Import (C, pthread_attr_init, "pthread_attr_init");
 430
 431    function pthread_attr_destroy
 432      (attributes : access pthread_attr_t) return int;
 433    pragma Import (C, pthread_attr_destroy, "pthread_attr_destroy");
 434
 435    function pthread_attr_setdetachstate
 436      (attr        : access pthread_attr_t;
 437       detachstate : int) return int;
 438    pragma Import (C, pthread_attr_setdetachstate);
 439
 440    function pthread_attr_setstacksize
 441      (attr      : access pthread_attr_t;
 442       stacksize : size_t) return int;
 443    pragma Import (C, pthread_attr_setstacksize);
 444
 445    function pthread_create
 446      (thread        : access pthread_t;
 447       attributes    : access pthread_attr_t;
 448       start_routine : Thread_Body;
 449       arg           : System.Address) return int;
 450    pragma Import (C, pthread_create, "pthread_create");
 451
 452    procedure pthread_exit (status : System.Address);
 453    pragma Import (C, pthread_exit, "pthread_exit");
 454
 455    function pthread_self return pthread_t;
 456    pragma Import (C, pthread_self, "pthread_self");
 457
 458    --------------------------
 459    -- POSIX.1c  Section 17 --
 460    --------------------------
 461
 462    function pthread_setspecific
 463      (key   : pthread_key_t;
 464       value : System.Address) return int;
 465    pragma Import (C, pthread_setspecific, "pthread_setspecific");
 466
 467    function pthread_getspecific (key : pthread_key_t) return System.Address;
 468    pragma Import (C, pthread_getspecific, "pthread_getspecific");
 469
 470    type destructor_pointer is access procedure (arg : System.Address);
 471
 472    function pthread_key_create
 473      (key        : access pthread_key_t;
 474       destructor : destructor_pointer) return int;
 475    pragma Import (C, pthread_key_create, "pthread_key_create");
 476
 477    procedure pthread_init;
 478    --  This is a dummy procedure to share some GNULLI files
 479
 480 private
 481
 482    type sigbit_array is array (1 .. 4) of unsigned;
 483    type sigset_t is record
 484       sa_sigbits : sigbit_array;
 485    end record;
 486    pragma Convention (C_Pass_By_Copy, sigset_t);
 487
 488    type pid_t is new unsigned;
 489
 490    type time_t is new long;
 491
 492    type timespec is record
 493       tv_sec       : time_t;
 494       tv_nsec      : long;
 495    end record;
 496    pragma Convention (C, timespec);
 497
 498    type clockid_t is new int;
 499    CLOCK_REALTIME : constant clockid_t := 0;
 500
 501    type struct_timeval is record
 502       tv_sec       : long;
 503       tv_usec      : long;
 504    end record;
 505    pragma Convention (C, struct_timeval);
 506
 507    type pthread_attr_t is record
 508       pt_attr_status          : int;
 509       pt_attr_stacksize       : size_t;
 510       pt_attr_stackaddr       : System.Address;
 511       pt_attr_detachstate     : int;
 512       pt_attr_contentionscope : int;
 513       pt_attr_inheritsched    : int;
 514       pt_attr_schedpolicy     : int;
 515       pt_attr_sched_param     : struct_sched_param;
 516       pt_attr_tlflags         : int;
 517    end record;
 518    pragma Convention (C, pthread_attr_t);
 519
 520    type pthread_condattr_t is record
 521       pt_condattr_status  : int;
 522       pt_condattr_pshared : int;
 523    end record;
 524    pragma Convention (C, pthread_condattr_t);
 525
 526    type pthread_mutexattr_t is record
 527       pt_mutexattr_status  : int;
 528       pt_mutexattr_pshared : int;
 529       pt_mutexattr_type    : int;
 530    end record;
 531    pragma Convention (C, pthread_mutexattr_t);
 532
 533    type thread_t is new long;
 534    type pthread_t is new thread_t;
 535
 536    type thrq_elt_t;
 537    type thrq_elt_t_ptr is access all thrq_elt_t;
 538
 539    type thrq_elt_t is record
 540       thrq_next : thrq_elt_t_ptr;
 541       thrq_prev : thrq_elt_t_ptr;
 542    end record;
 543    pragma Convention (C, thrq_elt_t);
 544
 545    type lwp_mutex_t is record
 546       wanted : char;
 547       lock   : unsigned_char;
 548    end record;
 549    pragma Convention (C, lwp_mutex_t);
 550    pragma Volatile (lwp_mutex_t);
 551
 552    type mutex_t is record
 553       m_lmutex    : lwp_mutex_t;
 554       m_sync_lock : lwp_mutex_t;
 555       m_type      : int;
 556       m_sleepq    : thrq_elt_t;
 557       filler1     : int;
 558       filler2     : int;
 559    end record;
 560    pragma Convention (C, mutex_t);
 561    pragma Volatile (mutex_t);
 562
 563    type pthread_mutex_t is record
 564       pt_mutex_mutex : mutex_t;
 565       pt_mutex_pid   : pid_t;
 566       pt_mutex_owner : thread_t;
 567       pt_mutex_depth : int;
 568       pt_mutex_attr  : pthread_mutexattr_t;
 569    end record;
 570    pragma Convention (C, pthread_mutex_t);
 571
 572    type lwp_cond_t is record
 573       wanted : char;
 574    end record;
 575    pragma Convention (C, lwp_cond_t);
 576    pragma Volatile (lwp_cond_t);
 577
 578    type cond_t is record
 579       c_lcond     : lwp_cond_t;
 580       c_sync_lock : lwp_mutex_t;
 581       c_type      : int;
 582       c_syncq     : thrq_elt_t;
 583    end record;
 584    pragma Convention (C, cond_t);
 585    pragma Volatile (cond_t);
 586
 587    type pthread_cond_t is record
 588       pt_cond_cond : cond_t;
 589       pt_cond_attr : pthread_condattr_t;
 590    end record;
 591    pragma Convention (C, pthread_cond_t);
 592
 593    type pthread_key_t is new unsigned;
 594
 595 end System.OS_Interface;