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 --          Copyright (C) 1999-2001 Free Software Foundation, Inc.          --
  10 --                                                                          --
  11 -- GNARL is free software; you can  redistribute it  and/or modify it under --
  12 -- terms of the  GNU General Public License as published  by the Free Soft- --
  13 -- ware  Foundation;  either version 2,  or (at your option) any later ver- --
  14 -- sion. GNARL is distributed in the hope that it will be useful, but WITH- --
  15 -- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
  16 -- or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License --
  17 -- for  more details.  You should have  received  a copy of the GNU General --
  18 -- Public License  distributed with GNARL; see file COPYING.  If not, write --
  19 -- to  the Free Software Foundation,  59 Temple Place - Suite 330,  Boston, --
  20 -- MA 02111-1307, USA.                                                      --
  21 --                                                                          --
  22 -- As a special exception,  if other files  instantiate  generics from this --
  23 -- unit, or you link  this unit with other files  to produce an executable, --
  24 -- this  unit  does not  by itself cause  the resulting  executable  to  be --
  25 -- covered  by the  GNU  General  Public  License.  This exception does not --
  26 -- however invalidate  any other reasons why  the executable file  might be --
  27 -- covered by the  GNU Public License.                                      --
  28 --                                                                          --
  29 -- GNARL was developed by the GNARL team at Florida State University.       --
  30 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  31 --                                                                          --
  32 ------------------------------------------------------------------------------
  33
  34 --  This is a LynxOS (Native) version of this package.
  35
  36 --  This package encapsulates all direct interfaces to OS services
  37 --  that are needed by children of System.
  38
  39 --  PLEASE DO NOT add any with-clauses to this package
  40 --  or remove the pragma Elaborate_Body.
  41 --  It is designed to be a bottom-level (leaf) package.
  42
  43 with Interfaces.C;
  44 package System.OS_Interface is
  45    pragma Preelaborate;
  46
  47    pragma Linker_Options ("-mthreads");
  48
  49    subtype int            is Interfaces.C.int;
  50    subtype char           is Interfaces.C.char;
  51    subtype short          is Interfaces.C.short;
  52    subtype long           is Interfaces.C.long;
  53    subtype unsigned       is Interfaces.C.unsigned;
  54    subtype unsigned_short is Interfaces.C.unsigned_short;
  55    subtype unsigned_long  is Interfaces.C.unsigned_long;
  56    subtype unsigned_char  is Interfaces.C.unsigned_char;
  57    subtype plain_char     is Interfaces.C.plain_char;
  58    subtype size_t         is Interfaces.C.size_t;
  59
  60    -----------
  61    -- Errno --
  62    -----------
  63
  64    function errno return int;
  65    pragma Import (C, errno, "__get_errno");
  66
  67    EAGAIN    : constant := 11;
  68    EINTR     : constant := 4;
  69    EINVAL    : constant := 22;
  70    ENOMEM    : constant := 12;
  71    ETIMEDOUT : constant := 60;
  72
  73    -------------
  74    -- Signals --
  75    -------------
  76
  77    Max_Interrupt : constant := 63;
  78    type Signal is new int range 0 .. Max_Interrupt;
  79    for Signal'Size use int'Size;
  80
  81    SIGHUP      : constant := 1; --  hangup
  82    SIGINT      : constant := 2; --  interrupt (rubout)
  83    SIGQUIT     : constant := 3; --  quit (ASCD FS)
  84    SIGILL      : constant := 4; --  illegal instruction (not reset)
  85    SIGTRAP     : constant := 5; --  trace trap (not reset)
  86    SIGBRK      : constant := 6; --  break
  87    SIGIOT      : constant := 6; --  IOT instruction
  88    SIGABRT     : constant := 6; --  used by abort, replace SIGIOT in the future
  89    SIGCORE     : constant := 7; --  kill with core dump
  90    SIGEMT      : constant := 7; --  EMT instruction
  91    SIGFPE      : constant := 8; --  floating point exception
  92    SIGKILL     : constant := 9; --  kill (cannot be caught or ignored)
  93    SIGBUS      : constant := 10; --  bus error
  94    SIGSEGV     : constant := 11; --  segmentation violation
  95    SIGSYS      : constant := 12; --  bad argument to system call
  96    SIGPIPE     : constant := 13; --  write on a pipe with no one to read it
  97    SIGALRM     : constant := 14; --  alarm clock
  98    SIGTERM     : constant := 15; --  software termination signal from kill
  99    SIGURG      : constant := 16; --  urgent condition on IO channel
 100    SIGSTOP     : constant := 17; --  stop (cannot be caught or ignored)
 101    SIGTSTP     : constant := 18; --  user stop requested from tty
 102    SIGCONT     : constant := 19; --  stopped process has been continued
 103    SIGCLD      : constant := 20; --  alias for SIGCHLD
 104    SIGCHLD     : constant := 20; --  child status change
 105    SIGTTIN     : constant := 21; --  background tty read attempted
 106    SIGTTOU     : constant := 22; --  background tty write attempted
 107    SIGIO       : constant := 23; --  I/O possible (Solaris SIGPOLL alias)
 108    SIGPOLL     : constant := 23; --  pollable event occurred
 109    SIGXCPU     : constant := 24; --  CPU time limit exceeded
 110    SIGXFSZ     : constant := 25; --  filesize limit exceeded
 111    SIGVTALRM   : constant := 26; --  virtual timer expired
 112    SIGPROF     : constant := 27; --  profiling timer expired
 113    SIGWINCH    : constant := 28; --  window size change
 114    SIGLOST     : constant := 29; --  SUN 4.1 compatibility
 115    SIGUSR1     : constant := 30; --  user defined signal 1
 116    SIGUSR2     : constant := 31; --  user defined signal 2
 117    SIGPRIO     : constant := 32; --  sent to a process with its priority or
 118                                  --  group is changed
 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, SIGTTIN, SIGTTOU, SIGTSTP, SIGPROF);
 128    Reserved    : constant Signal_Set := (SIGABRT, SIGKILL, SIGSTOP, SIGPRIO);
 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_handler : System.Address;
 149       sa_mask    : sigset_t;
 150       sa_flags   : int;
 151    end record;
 152    pragma Convention (C, struct_sigaction);
 153    type struct_sigaction_ptr is access all struct_sigaction;
 154
 155    SIG_BLOCK   : constant := 0;
 156    SIG_UNBLOCK : constant := 1;
 157    SIG_SETMASK : constant := 2;
 158
 159    SIG_DFL : constant := 0;
 160    SIG_IGN : constant := 1;
 161
 162    function sigaction
 163      (sig  : Signal;
 164       act  : struct_sigaction_ptr;
 165       oact : struct_sigaction_ptr) return int;
 166    pragma Import (C, sigaction, "sigaction");
 167
 168    ----------
 169    -- Time --
 170    ----------
 171
 172    Time_Slice_Supported : constant Boolean := True;
 173    --  Indicates wether time slicing is supported
 174
 175    type timespec is private;
 176
 177    type clockid_t is private;
 178
 179    CLOCK_REALTIME : constant clockid_t;
 180
 181    function clock_gettime
 182      (clock_id : clockid_t;
 183       tp       : access timespec) return int;
 184    pragma Inline (clock_gettime);
 185    --  LynxOS has non standard clock_gettime
 186
 187    function To_Duration (TS : timespec) return Duration;
 188    pragma Inline (To_Duration);
 189
 190    function To_Timespec (D : Duration) return timespec;
 191    pragma Inline (To_Timespec);
 192
 193    type struct_timezone is record
 194       tz_minuteswest : int;
 195       tz_dsttime     : int;
 196    end record;
 197    pragma Convention (C, struct_timezone);
 198    type struct_timezone_ptr is access all struct_timezone;
 199
 200    type struct_timeval is private;
 201    --  This is needed on systems that do not have clock_gettime()
 202    --  but do have gettimeofday().
 203
 204    function To_Duration (TV : struct_timeval) return Duration;
 205    pragma Inline (To_Duration);
 206
 207    function To_Timeval (D : Duration) return struct_timeval;
 208    pragma Inline (To_Timeval);
 209
 210    -------------------------
 211    -- Priority Scheduling --
 212    -------------------------
 213
 214    SCHED_FIFO  : constant := 16#00200000#;
 215    SCHED_RR    : constant := 16#00100000#;
 216    SCHED_OTHER : constant := 16#00400000#;
 217
 218    -------------
 219    -- Process --
 220    -------------
 221
 222    type pid_t is private;
 223
 224    function kill (pid : pid_t; sig : Signal) return int;
 225    pragma Import (C, kill, "kill");
 226
 227    function getpid return pid_t;
 228    pragma Import (C, getpid, "getpid");
 229
 230    ---------
 231    -- LWP --
 232    ---------
 233
 234    function lwp_self return System.Address;
 235    --  lwp_self does not exist on this thread library, revert to pthread_self
 236    --  which is the closest approximation (with getpid). This function is
 237    --  needed to share 7staprop.adb across POSIX-like targets.
 238    pragma Import (C, lwp_self, "pthread_self");
 239
 240    -------------
 241    -- Threads --
 242    -------------
 243
 244    type Thread_Body is access
 245      function (arg : System.Address) return System.Address;
 246    type pthread_t           is private;
 247    subtype Thread_Id        is pthread_t;
 248
 249    type pthread_mutex_t     is limited private;
 250    type pthread_cond_t      is limited private;
 251    type st_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
 295      (set : access sigset_t;
 296       sig : access Signal) return int;
 297    pragma Inline (sigwait);
 298    --  LynxOS has non standard sigwait
 299
 300    function pthread_kill (thread : pthread_t; sig : Signal) return int;
 301    pragma Import (C, pthread_kill, "pthread_kill");
 302
 303    type sigset_t_ptr is access all sigset_t;
 304
 305    function pthread_sigmask
 306      (how  : int;
 307       set  : sigset_t_ptr;
 308       oset : sigset_t_ptr) return int;
 309    pragma Import (C, pthread_sigmask, "sigprocmask");
 310
 311    --------------------------
 312    -- POSIX.1c  Section 11 --
 313    --------------------------
 314
 315    function pthread_mutexattr_init
 316      (attr : access pthread_mutexattr_t) return int;
 317    pragma Inline (pthread_mutexattr_init);
 318    --  LynxOS has a nonstandard pthread_mutexattr_init
 319
 320    function pthread_mutexattr_destroy
 321      (attr : access pthread_mutexattr_t) return int;
 322    pragma Inline (pthread_mutexattr_destroy);
 323    --  Lynxos has a nonstandard pthread_mutexattr_destroy
 324
 325    function pthread_mutex_init
 326      (mutex : access pthread_mutex_t;
 327       attr  : access pthread_mutexattr_t) return int;
 328    pragma Inline (pthread_mutex_init);
 329    --  LynxOS has a nonstandard pthread_mutex_init
 330
 331    function pthread_mutex_destroy (mutex : access pthread_mutex_t) return int;
 332    pragma Inline (pthread_mutex_destroy);
 333    --  LynxOS has a nonstandard pthread_mutex_destroy
 334
 335    function pthread_mutex_lock (mutex : access pthread_mutex_t) return int;
 336    pragma Inline (pthread_mutex_lock);
 337    --  LynxOS has a nonstandard pthread_mutex_lock
 338
 339    function pthread_mutex_unlock (mutex : access pthread_mutex_t) return int;
 340    pragma Inline (pthread_mutex_unlock);
 341    --  LynxOS has a nonstandard pthread_mutex_unlock
 342
 343    function pthread_condattr_init
 344      (attr : access pthread_condattr_t) return int;
 345    pragma Inline (pthread_condattr_init);
 346    --  LynxOS has a nonstandard pthread_condattr_init
 347
 348    function pthread_condattr_destroy
 349      (attr : access pthread_condattr_t) return int;
 350    pragma Inline (pthread_condattr_destroy);
 351    --  LynxOS has a nonstandard pthread_condattr_destroy
 352
 353    function pthread_cond_init
 354      (cond : access pthread_cond_t;
 355       attr : access pthread_condattr_t) return int;
 356    pragma Inline (pthread_cond_init);
 357    --  LynxOS has a non standard pthread_cond_init
 358
 359    function pthread_cond_destroy (cond : access pthread_cond_t) return int;
 360    pragma Inline (pthread_cond_destroy);
 361    --  LynxOS has a nonstandard pthread_cond_destroy
 362
 363    function pthread_cond_signal (cond : access pthread_cond_t) return int;
 364    pragma Inline (pthread_cond_signal);
 365    --  LynxOS has a nonstandard pthread_cond_signal
 366
 367    function pthread_cond_wait
 368      (cond  : access pthread_cond_t;
 369       mutex : access pthread_mutex_t) return int;
 370    pragma Inline (pthread_cond_wait);
 371    --  LynxOS has a nonstandard pthread_cond_wait
 372
 373    function pthread_cond_timedwait
 374      (cond    : access pthread_cond_t;
 375       mutex   : access pthread_mutex_t;
 376       reltime : access timespec) return int;
 377    pragma Inline (pthread_cond_timedwait);
 378    --  LynxOS has a nonstandard pthrad_cond_timedwait
 379
 380    Relative_Timed_Wait : constant Boolean := True;
 381    --  pthread_cond_timedwait requires a relative delay time
 382
 383    --------------------------
 384    -- POSIX.1c  Section 13 --
 385    --------------------------
 386
 387    PTHREAD_PRIO_NONE    : constant := 0;
 388    PTHREAD_PRIO_INHERIT : constant := 0;
 389    PTHREAD_PRIO_PROTECT : constant := 0;
 390
 391    type struct_sched_param is record
 392       sched_priority : int;  --  scheduling priority
 393    end record;
 394
 395    function pthread_setschedparam
 396      (thread : pthread_t;
 397       policy : int;
 398       param  : access struct_sched_param) return int;
 399    pragma Inline (pthread_setschedparam);
 400    --  LynxOS doesn't have pthread_setschedparam.
 401    --  Instead, use pthread_setscheduler
 402
 403    function pthread_mutexattr_setprotocol
 404      (attr     : access pthread_mutexattr_t;
 405       protocol : int) return int;
 406    pragma Inline (pthread_mutexattr_setprotocol);
 407    --  LynxOS doesn't have pthread_mutexattr_setprotocol
 408
 409    function pthread_mutexattr_setprioceiling
 410      (attr     : access pthread_mutexattr_t;
 411       prioceiling : int) return int;
 412    pragma Inline (pthread_mutexattr_setprioceiling);
 413    --  LynxOS doesn't have pthread_mutexattr_setprioceiling
 414
 415    function pthread_attr_setscope
 416      (attr            : access pthread_attr_t;
 417       contentionscope : int) return int;
 418    --  LynxOS doesn't have pthread_attr_setscope: all threads have system scope
 419    pragma Inline (pthread_attr_setscope);
 420
 421    function pthread_attr_setschedpolicy
 422      (attr   : access pthread_attr_t;
 423       policy : int) return int;
 424    pragma Import (C, pthread_attr_setschedpolicy, "pthread_attr_setsched");
 425
 426    function sched_yield return int;
 427    --   pragma Import (C, sched_yield, "sched_yield");
 428    pragma Inline (sched_yield);
 429
 430    ---------------------------
 431    -- P1003.1c - Section 16 --
 432    ---------------------------
 433
 434    function pthread_attr_init (attributes : access pthread_attr_t) return int;
 435    pragma Import (C, pthread_attr_init, "pthread_attr_create");
 436
 437    function pthread_attr_destroy
 438      (attributes : access pthread_attr_t) return int;
 439    pragma Import (C, pthread_attr_destroy, "pthread_attr_delete");
 440
 441    function pthread_attr_setdetachstate
 442      (attr        : access pthread_attr_t;
 443       detachstate : int) return int;
 444    pragma Inline (pthread_attr_setdetachstate);
 445    --  LynxOS doesn't have pthread_attr_setdetachstate
 446
 447    function pthread_attr_setstacksize
 448      (attr      : access pthread_attr_t;
 449       stacksize : size_t) return int;
 450    pragma Import (C, pthread_attr_setstacksize, "pthread_attr_setstacksize");
 451
 452    function pthread_create
 453      (thread        : access pthread_t;
 454       attributes    : access pthread_attr_t;
 455       start_routine : Thread_Body;
 456       arg           : System.Address) return int;
 457    pragma Inline (pthread_create);
 458    --  LynxOS has a non standard pthread_create
 459
 460    procedure pthread_exit (status : System.Address);
 461    pragma Import (C, pthread_exit, "pthread_exit");
 462
 463    function pthread_self return pthread_t;
 464    pragma Import (C, pthread_self, "pthread_self");
 465
 466    --------------------------
 467    -- POSIX.1c  Section 17 --
 468    --------------------------
 469
 470    function pthread_setspecific
 471      (key   : pthread_key_t;
 472       value : System.Address) return int;
 473    pragma Inline (pthread_setspecific);
 474    --  LynxOS has a non standard pthread_setspecific
 475
 476    function pthread_getspecific (key : pthread_key_t) return System.Address;
 477    pragma Inline (pthread_getspecific);
 478    --  LynxOS has a non standard pthread_getspecific
 479
 480    type destructor_pointer is access procedure (arg : System.Address);
 481
 482    function pthread_key_create
 483      (key        : access pthread_key_t;
 484       destructor : destructor_pointer) return int;
 485    pragma Inline (pthread_key_create);
 486    --  LynxOS has a non standard pthread_keycreate
 487
 488    procedure pthread_init;
 489    --  This is a dummy procedure to share some GNULLI files
 490
 491 private
 492
 493    type sigbit_array is array (1 .. 2) of long;
 494    type sigset_t is record
 495       sa_sigbits : sigbit_array;
 496    end record;
 497    pragma Convention (C_Pass_By_Copy, sigset_t);
 498
 499    type pid_t is new long;
 500
 501    type time_t is new long;
 502
 503    type timespec is record
 504       tv_sec  : time_t;
 505       tv_nsec : long;
 506    end record;
 507    pragma Convention (C, timespec);
 508
 509    type clockid_t is new unsigned_char;
 510    CLOCK_REALTIME : constant clockid_t := 0;
 511
 512    type struct_timeval is record
 513       tv_sec  : time_t;
 514       tv_usec : time_t;
 515    end record;
 516    pragma Convention (C, struct_timeval);
 517
 518    type st_t is record
 519       stksize      : int;
 520       prio         : int;
 521       inheritsched : int;
 522       state        : int;
 523       sched        : int;
 524    end record;
 525    pragma Convention (C, st_t);
 526
 527    type pthread_attr_t is record
 528       st                 : st_t;
 529       pthread_attr_scope : int;  --  ignored
 530    end record;
 531    pragma Convention (C, pthread_attr_t);
 532
 533    type pthread_condattr_t is new int;
 534
 535    type pthread_mutexattr_t is new int;
 536
 537    type tid_t is new short;
 538    type pthread_t is new tid_t;
 539
 540    type synch_ptr is access all pthread_mutex_t;
 541    type pthread_mutex_t is record
 542       w_count   : int;
 543       mut_owner : int;
 544       id        : unsigned;
 545       next      : synch_ptr;
 546    end record;
 547    pragma Convention (C, pthread_mutex_t);
 548
 549    type pthread_cond_t is new pthread_mutex_t;
 550
 551    type pthread_key_t is new int;
 552
 553 end System.OS_Interface;