gcc/ada/52osinte.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 LynxOS (Native) 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 ("-mthreads");
  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 := 60;
  73
  74    -------------
  75    -- Signals --
  76    -------------
  77
  78    Max_Interrupt : constant := 63;
  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    SIGBRK      : constant := 6; --  break
  88    SIGIOT      : constant := 6; --  IOT instruction
  89    SIGABRT     : constant := 6; --  used by abort, replace SIGIOT in the future
  90    SIGCORE     : constant := 7; --  kill with core dump
  91    SIGEMT      : constant := 7; --  EMT instruction
  92    SIGFPE      : constant := 8; --  floating point exception
  93    SIGKILL     : constant := 9; --  kill (cannot be caught or ignored)
  94    SIGBUS      : constant := 10; --  bus error
  95    SIGSEGV     : constant := 11; --  segmentation violation
  96    SIGSYS      : constant := 12; --  bad argument to system call
  97    SIGPIPE     : constant := 13; --  write on a pipe with no one to read it
  98    SIGALRM     : constant := 14; --  alarm clock
  99    SIGTERM     : constant := 15; --  software termination signal from kill
 100    SIGURG      : constant := 16; --  urgent condition on IO channel
 101    SIGSTOP     : constant := 17; --  stop (cannot be caught or ignored)
 102    SIGTSTP     : constant := 18; --  user stop requested from tty
 103    SIGCONT     : constant := 19; --  stopped process has been continued
 104    SIGCLD      : constant := 20; --  alias for SIGCHLD
 105    SIGCHLD     : constant := 20; --  child status change
 106    SIGTTIN     : constant := 21; --  background tty read attempted
 107    SIGTTOU     : constant := 22; --  background tty write attempted
 108    SIGIO       : constant := 23; --  I/O possible (Solaris SIGPOLL alias)
 109    SIGPOLL     : constant := 23; --  pollable event occurred
 110    SIGXCPU     : constant := 24; --  CPU time limit exceeded
 111    SIGXFSZ     : constant := 25; --  filesize limit exceeded
 112    SIGVTALRM   : constant := 26; --  virtual timer expired
 113    SIGPROF     : constant := 27; --  profiling timer expired
 114    SIGWINCH    : constant := 28; --  window size change
 115    SIGLOST     : constant := 29; --  SUN 4.1 compatibility
 116    SIGUSR1     : constant := 30; --  user defined signal 1
 117    SIGUSR2     : constant := 31; --  user defined signal 2
 118    SIGPRIO     : constant := 32; --  sent to a process with its priority or
 119                                  --  group is changed
 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    type Signal_Set is array (Natural range <>) of Signal;
 126
 127    Unmasked    : constant Signal_Set :=
 128      (SIGTRAP, SIGTTIN, SIGTTOU, SIGTSTP, SIGPROF);
 129    Reserved    : constant Signal_Set := (SIGABRT, SIGKILL, SIGSTOP, SIGPRIO);
 130
 131    type sigset_t is private;
 132
 133    function sigaddset (set : access sigset_t; sig : Signal) return int;
 134    pragma Import (C, sigaddset, "sigaddset");
 135
 136    function sigdelset (set : access sigset_t; sig : Signal) return int;
 137    pragma Import (C, sigdelset, "sigdelset");
 138
 139    function sigfillset (set : access sigset_t) return int;
 140    pragma Import (C, sigfillset, "sigfillset");
 141
 142    function sigismember (set : access sigset_t; sig : Signal) return int;
 143    pragma Import (C, sigismember, "sigismember");
 144
 145    function sigemptyset (set : access sigset_t) return int;
 146    pragma Import (C, sigemptyset, "sigemptyset");
 147
 148    type struct_sigaction is record
 149       sa_handler : System.Address;
 150       sa_mask    : sigset_t;
 151       sa_flags   : int;
 152    end record;
 153    pragma Convention (C, struct_sigaction);
 154    type struct_sigaction_ptr is access all struct_sigaction;
 155
 156    SIG_BLOCK   : constant := 0;
 157    SIG_UNBLOCK : constant := 1;
 158    SIG_SETMASK : constant := 2;
 159
 160    SIG_DFL : constant := 0;
 161    SIG_IGN : constant := 1;
 162
 163    function sigaction
 164      (sig  : Signal;
 165       act  : struct_sigaction_ptr;
 166       oact : struct_sigaction_ptr) return int;
 167    pragma Import (C, sigaction, "sigaction");
 168
 169    ----------
 170    -- Time --
 171    ----------
 172
 173    Time_Slice_Supported : constant Boolean := True;
 174    --  Indicates wether time slicing is supported
 175
 176    type timespec is private;
 177
 178    type clockid_t is private;
 179
 180    CLOCK_REALTIME : constant clockid_t;
 181
 182    function clock_gettime
 183      (clock_id : clockid_t;
 184       tp       : access timespec) return int;
 185    pragma Inline (clock_gettime);
 186    --  LynxOS has non standard clock_gettime
 187
 188    function To_Duration (TS : timespec) return Duration;
 189    pragma Inline (To_Duration);
 190
 191    function To_Timespec (D : Duration) return timespec;
 192    pragma Inline (To_Timespec);
 193
 194    type struct_timezone is record
 195       tz_minuteswest : int;
 196       tz_dsttime     : int;
 197    end record;
 198    pragma Convention (C, struct_timezone);
 199    type struct_timezone_ptr is access all struct_timezone;
 200
 201    type struct_timeval is private;
 202    --  This is needed on systems that do not have clock_gettime()
 203    --  but do have gettimeofday().
 204
 205    function To_Duration (TV : struct_timeval) return Duration;
 206    pragma Inline (To_Duration);
 207
 208    function To_Timeval (D : Duration) return struct_timeval;
 209    pragma Inline (To_Timeval);
 210
 211    -------------------------
 212    -- Priority Scheduling --
 213    -------------------------
 214
 215    SCHED_FIFO  : constant := 16#00200000#;
 216    SCHED_RR    : constant := 16#00100000#;
 217    SCHED_OTHER : constant := 16#00400000#;
 218
 219    -------------
 220    -- Process --
 221    -------------
 222
 223    type pid_t is private;
 224
 225    function kill (pid : pid_t; sig : Signal) return int;
 226    pragma Import (C, kill, "kill");
 227
 228    function getpid return pid_t;
 229    pragma Import (C, getpid, "getpid");
 230
 231    ---------
 232    -- LWP --
 233    ---------
 234
 235    function lwp_self return System.Address;
 236    --  lwp_self does not exist on this thread library, revert to pthread_self
 237    --  which is the closest approximation (with getpid). This function is
 238    --  needed to share 7staprop.adb across POSIX-like targets.
 239    pragma Import (C, lwp_self, "pthread_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 st_t                is limited private;
 253    type pthread_attr_t      is limited private;
 254    type pthread_mutexattr_t is limited private;
 255    type pthread_condattr_t  is limited private;
 256    type pthread_key_t       is private;
 257
 258    PTHREAD_CREATE_DETACHED : constant := 0;
 259
 260    -----------
 261    -- Stack --
 262    -----------
 263
 264    Stack_Base_Available : constant Boolean := False;
 265    --  Indicates wether the stack base is available on this target.
 266
 267    function Get_Stack_Base (thread : pthread_t) return Address;
 268    pragma Inline (Get_Stack_Base);
 269    --  returns the stack base of the specified thread.
 270    --  Only call this function when Stack_Base_Available is True.
 271
 272    function Get_Page_Size return size_t;
 273    function Get_Page_Size return Address;
 274    pragma Import (C, Get_Page_Size, "getpagesize");
 275    --  returns the size of a page, or 0 if this is not relevant on this
 276    --  target
 277
 278    PROT_NONE  : constant := 0;
 279    PROT_READ  : constant := 1;
 280    PROT_WRITE : constant := 2;
 281    PROT_EXEC  : constant := 4;
 282    PROT_USER  : constant := 8;
 283    PROT_ALL   : constant := PROT_READ + PROT_WRITE + PROT_EXEC + PROT_USER;
 284
 285    PROT_ON    : constant := PROT_READ;
 286    PROT_OFF   : constant := PROT_ALL;
 287
 288    function mprotect (addr : Address; len : size_t; prot : int) return int;
 289    pragma Import (C, mprotect);
 290
 291    -------------------------
 292    -- POSIX.1c  Section 3 --
 293    -------------------------
 294
 295    function sigwait
 296      (set : access sigset_t;
 297       sig : access Signal) return int;
 298    pragma Inline (sigwait);
 299    --  LynxOS has non standard sigwait
 300
 301    function pthread_kill (thread : pthread_t; sig : Signal) return int;
 302    pragma Import (C, pthread_kill, "pthread_kill");
 303
 304    type sigset_t_ptr is access all sigset_t;
 305
 306    function pthread_sigmask
 307      (how  : int;
 308       set  : sigset_t_ptr;
 309       oset : sigset_t_ptr) return int;
 310    pragma Import (C, pthread_sigmask, "sigprocmask");
 311
 312    --------------------------
 313    -- POSIX.1c  Section 11 --
 314    --------------------------
 315
 316    function pthread_mutexattr_init
 317      (attr : access pthread_mutexattr_t) return int;
 318    pragma Inline (pthread_mutexattr_init);
 319    --  LynxOS has a nonstandard pthread_mutexattr_init
 320
 321    function pthread_mutexattr_destroy
 322      (attr : access pthread_mutexattr_t) return int;
 323    pragma Inline (pthread_mutexattr_destroy);
 324    --  Lynxos has a nonstandard pthread_mutexattr_destroy
 325
 326    function pthread_mutex_init
 327      (mutex : access pthread_mutex_t;
 328       attr  : access pthread_mutexattr_t) return int;
 329    pragma Inline (pthread_mutex_init);
 330    --  LynxOS has a nonstandard pthread_mutex_init
 331
 332    function pthread_mutex_destroy (mutex : access pthread_mutex_t) return int;
 333    pragma Inline (pthread_mutex_destroy);
 334    --  LynxOS has a nonstandard pthread_mutex_destroy
 335
 336    function pthread_mutex_lock (mutex : access pthread_mutex_t) return int;
 337    pragma Inline (pthread_mutex_lock);
 338    --  LynxOS has a nonstandard pthread_mutex_lock
 339
 340    function pthread_mutex_unlock (mutex : access pthread_mutex_t) return int;
 341    pragma Inline (pthread_mutex_unlock);
 342    --  LynxOS has a nonstandard pthread_mutex_unlock
 343
 344    function pthread_condattr_init
 345      (attr : access pthread_condattr_t) return int;
 346    pragma Inline (pthread_condattr_init);
 347    --  LynxOS has a nonstandard pthread_condattr_init
 348
 349    function pthread_condattr_destroy
 350      (attr : access pthread_condattr_t) return int;
 351    pragma Inline (pthread_condattr_destroy);
 352    --  LynxOS has a nonstandard pthread_condattr_destroy
 353
 354    function pthread_cond_init
 355      (cond : access pthread_cond_t;
 356       attr : access pthread_condattr_t) return int;
 357    pragma Inline (pthread_cond_init);
 358    --  LynxOS has a non standard pthread_cond_init
 359
 360    function pthread_cond_destroy (cond : access pthread_cond_t) return int;
 361    pragma Inline (pthread_cond_destroy);
 362    --  LynxOS has a nonstandard pthread_cond_destroy
 363
 364    function pthread_cond_signal (cond : access pthread_cond_t) return int;
 365    pragma Inline (pthread_cond_signal);
 366    --  LynxOS has a nonstandard pthread_cond_signal
 367
 368    function pthread_cond_wait
 369      (cond  : access pthread_cond_t;
 370       mutex : access pthread_mutex_t) return int;
 371    pragma Inline (pthread_cond_wait);
 372    --  LynxOS has a nonstandard pthread_cond_wait
 373
 374    function pthread_cond_timedwait
 375      (cond    : access pthread_cond_t;
 376       mutex   : access pthread_mutex_t;
 377       reltime : access timespec) return int;
 378    pragma Inline (pthread_cond_timedwait);
 379    --  LynxOS has a nonstandard pthrad_cond_timedwait
 380
 381    Relative_Timed_Wait : constant Boolean := True;
 382    --  pthread_cond_timedwait requires a relative delay time
 383
 384    --------------------------
 385    -- POSIX.1c  Section 13 --
 386    --------------------------
 387
 388    PTHREAD_PRIO_NONE    : constant := 0;
 389    PTHREAD_PRIO_INHERIT : constant := 0;
 390    PTHREAD_PRIO_PROTECT : constant := 0;
 391
 392    type struct_sched_param is record
 393       sched_priority : int;  --  scheduling priority
 394    end record;
 395
 396    function pthread_setschedparam
 397      (thread : pthread_t;
 398       policy : int;
 399       param  : access struct_sched_param) return int;
 400    pragma Inline (pthread_setschedparam);
 401    --  LynxOS doesn't have pthread_setschedparam.
 402    --  Instead, use pthread_setscheduler
 403
 404    function pthread_mutexattr_setprotocol
 405      (attr     : access pthread_mutexattr_t;
 406       protocol : int) return int;
 407    pragma Inline (pthread_mutexattr_setprotocol);
 408    --  LynxOS doesn't have pthread_mutexattr_setprotocol
 409
 410    function pthread_mutexattr_setprioceiling
 411      (attr     : access pthread_mutexattr_t;
 412       prioceiling : int) return int;
 413    pragma Inline (pthread_mutexattr_setprioceiling);
 414    --  LynxOS doesn't have pthread_mutexattr_setprioceiling
 415
 416    function pthread_attr_setscope
 417      (attr            : access pthread_attr_t;
 418       contentionscope : int) return int;
 419    --  LynxOS doesn't have pthread_attr_setscope: all threads have system scope
 420    pragma Inline (pthread_attr_setscope);
 421
 422    function pthread_attr_setschedpolicy
 423      (attr   : access pthread_attr_t;
 424       policy : int) return int;
 425    pragma Import (C, pthread_attr_setschedpolicy, "pthread_attr_setsched");
 426
 427    function sched_yield return int;
 428    --   pragma Import (C, sched_yield, "sched_yield");
 429    pragma Inline (sched_yield);
 430
 431    ---------------------------
 432    -- P1003.1c - Section 16 --
 433    ---------------------------
 434
 435    function pthread_attr_init (attributes : access pthread_attr_t) return int;
 436    pragma Import (C, pthread_attr_init, "pthread_attr_create");
 437
 438    function pthread_attr_destroy
 439      (attributes : access pthread_attr_t) return int;
 440    pragma Import (C, pthread_attr_destroy, "pthread_attr_delete");
 441
 442    function pthread_attr_setdetachstate
 443      (attr        : access pthread_attr_t;
 444       detachstate : int) return int;
 445    pragma Inline (pthread_attr_setdetachstate);
 446    --  LynxOS doesn't have pthread_attr_setdetachstate
 447
 448    function pthread_attr_setstacksize
 449      (attr      : access pthread_attr_t;
 450       stacksize : size_t) return int;
 451    pragma Import (C, pthread_attr_setstacksize, "pthread_attr_setstacksize");
 452
 453    function pthread_create
 454      (thread        : access pthread_t;
 455       attributes    : access pthread_attr_t;
 456       start_routine : Thread_Body;
 457       arg           : System.Address) return int;
 458    pragma Inline (pthread_create);
 459    --  LynxOS has a non standard pthread_create
 460
 461    procedure pthread_exit (status : System.Address);
 462    pragma Import (C, pthread_exit, "pthread_exit");
 463
 464    function pthread_self return pthread_t;
 465    pragma Import (C, pthread_self, "pthread_self");
 466
 467    --------------------------
 468    -- POSIX.1c  Section 17 --
 469    --------------------------
 470
 471    function pthread_setspecific
 472      (key   : pthread_key_t;
 473       value : System.Address) return int;
 474    pragma Inline (pthread_setspecific);
 475    --  LynxOS has a non standard pthread_setspecific
 476
 477    function pthread_getspecific (key : pthread_key_t) return System.Address;
 478    pragma Inline (pthread_getspecific);
 479    --  LynxOS has a non standard pthread_getspecific
 480
 481    type destructor_pointer is access procedure (arg : System.Address);
 482
 483    function pthread_key_create
 484      (key        : access pthread_key_t;
 485       destructor : destructor_pointer) return int;
 486    pragma Inline (pthread_key_create);
 487    --  LynxOS has a non standard pthread_keycreate
 488
 489    procedure pthread_init;
 490    --  This is a dummy procedure to share some GNULLI files
 491
 492 private
 493
 494    type sigbit_array is array (1 .. 2) of long;
 495    type sigset_t is record
 496       sa_sigbits : sigbit_array;
 497    end record;
 498    pragma Convention (C_Pass_By_Copy, sigset_t);
 499
 500    type pid_t is new long;
 501
 502    type time_t is new long;
 503
 504    type timespec is record
 505       tv_sec  : time_t;
 506       tv_nsec : long;
 507    end record;
 508    pragma Convention (C, timespec);
 509
 510    type clockid_t is new unsigned_char;
 511    CLOCK_REALTIME : constant clockid_t := 0;
 512
 513    type struct_timeval is record
 514       tv_sec  : time_t;
 515       tv_usec : time_t;
 516    end record;
 517    pragma Convention (C, struct_timeval);
 518
 519    type st_t is record
 520       stksize      : int;
 521       prio         : int;
 522       inheritsched : int;
 523       state        : int;
 524       sched        : int;
 525    end record;
 526    pragma Convention (C, st_t);
 527
 528    type pthread_attr_t is record
 529       st                 : st_t;
 530       pthread_attr_scope : int;  --  ignored
 531    end record;
 532    pragma Convention (C, pthread_attr_t);
 533
 534    type pthread_condattr_t is new int;
 535
 536    type pthread_mutexattr_t is new int;
 537
 538    type tid_t is new short;
 539    type pthread_t is new tid_t;
 540
 541    type synch_ptr is access all pthread_mutex_t;
 542    type pthread_mutex_t is record
 543       w_count   : int;
 544       mut_owner : int;
 545       id        : unsigned;
 546       next      : synch_ptr;
 547    end record;
 548    pragma Convention (C, pthread_mutex_t);
 549
 550    type pthread_cond_t is new pthread_mutex_t;
 551
 552    type pthread_key_t is new int;
 553
 554 end System.OS_Interface;