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. It is --
  31 -- now maintained by Ada Core Technologies Inc. in cooperation with Florida --
  32 -- State University (http://www.gnat.com).                                  --
  33 --                                                                          --
  34 ------------------------------------------------------------------------------
  35
  36 --  This is a LynxOS (Native) 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
  42 --  or remove the pragma Elaborate_Body.
  43 --  It is designed to be a bottom-level (leaf) package.
  44
  45 with Interfaces.C;
  46 package System.OS_Interface is
  47    pragma Preelaborate;
  48
  49    pragma Linker_Options ("-mthreads");
  50
  51    subtype int            is Interfaces.C.int;
  52    subtype char           is Interfaces.C.char;
  53    subtype short          is Interfaces.C.short;
  54    subtype long           is Interfaces.C.long;
  55    subtype unsigned       is Interfaces.C.unsigned;
  56    subtype unsigned_short is Interfaces.C.unsigned_short;
  57    subtype unsigned_long  is Interfaces.C.unsigned_long;
  58    subtype unsigned_char  is Interfaces.C.unsigned_char;
  59    subtype plain_char     is Interfaces.C.plain_char;
  60    subtype size_t         is Interfaces.C.size_t;
  61
  62    -----------
  63    -- Errno --
  64    -----------
  65
  66    function errno return int;
  67    pragma Import (C, errno, "__get_errno");
  68
  69    EAGAIN    : constant := 11;
  70    EINTR     : constant := 4;
  71    EINVAL    : constant := 22;
  72    ENOMEM    : constant := 12;
  73    ETIMEDOUT : constant := 60;
  74
  75    -------------
  76    -- Signals --
  77    -------------
  78
  79    Max_Interrupt : constant := 63;
  80    type Signal is new int range 0 .. Max_Interrupt;
  81    for Signal'Size use int'Size;
  82
  83    SIGHUP      : constant := 1; --  hangup
  84    SIGINT      : constant := 2; --  interrupt (rubout)
  85    SIGQUIT     : constant := 3; --  quit (ASCD FS)
  86    SIGILL      : constant := 4; --  illegal instruction (not reset)
  87    SIGTRAP     : constant := 5; --  trace trap (not reset)
  88    SIGBRK      : constant := 6; --  break
  89    SIGIOT      : constant := 6; --  IOT instruction
  90    SIGABRT     : constant := 6; --  used by abort, replace SIGIOT in the future
  91    SIGCORE     : constant := 7; --  kill with core dump
  92    SIGEMT      : constant := 7; --  EMT instruction
  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 argument to 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    SIGURG      : constant := 16; --  urgent condition on IO channel
 102    SIGSTOP     : constant := 17; --  stop (cannot be caught or ignored)
 103    SIGTSTP     : constant := 18; --  user stop requested from tty
 104    SIGCONT     : constant := 19; --  stopped process has been continued
 105    SIGCLD      : constant := 20; --  alias for SIGCHLD
 106    SIGCHLD     : constant := 20; --  child status change
 107    SIGTTIN     : constant := 21; --  background tty read attempted
 108    SIGTTOU     : constant := 22; --  background tty write attempted
 109    SIGIO       : constant := 23; --  I/O possible (Solaris SIGPOLL alias)
 110    SIGPOLL     : constant := 23; --  pollable event occurred
 111    SIGXCPU     : constant := 24; --  CPU time limit exceeded
 112    SIGXFSZ     : constant := 25; --  filesize limit exceeded
 113    SIGVTALRM   : constant := 26; --  virtual timer expired
 114    SIGPROF     : constant := 27; --  profiling timer expired
 115    SIGWINCH    : constant := 28; --  window size change
 116    SIGLOST     : constant := 29; --  SUN 4.1 compatibility
 117    SIGUSR1     : constant := 30; --  user defined signal 1
 118    SIGUSR2     : constant := 31; --  user defined signal 2
 119    SIGPRIO     : constant := 32; --  sent to a process with its priority or
 120                                  --  group is changed
 121
 122    SIGADAABORT : constant := SIGABRT;
 123    --  Change this if you want to use another signal for task abort.
 124    --  SIGTERM might be a good one.
 125
 126    type Signal_Set is array (Natural range <>) of Signal;
 127
 128    Unmasked    : constant Signal_Set :=
 129      (SIGTRAP, SIGTTIN, SIGTTOU, SIGTSTP, SIGPROF);
 130    Reserved    : constant Signal_Set := (SIGABRT, SIGKILL, SIGSTOP, SIGPRIO);
 131
 132    type sigset_t is private;
 133
 134    function sigaddset (set : access sigset_t; sig : Signal) return int;
 135    pragma Import (C, sigaddset, "sigaddset");
 136
 137    function sigdelset (set : access sigset_t; sig : Signal) return int;
 138    pragma Import (C, sigdelset, "sigdelset");
 139
 140    function sigfillset (set : access sigset_t) return int;
 141    pragma Import (C, sigfillset, "sigfillset");
 142
 143    function sigismember (set : access sigset_t; sig : Signal) return int;
 144    pragma Import (C, sigismember, "sigismember");
 145
 146    function sigemptyset (set : access sigset_t) return int;
 147    pragma Import (C, sigemptyset, "sigemptyset");
 148
 149    type struct_sigaction is record
 150       sa_handler : System.Address;
 151       sa_mask    : sigset_t;
 152       sa_flags   : 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 := 0;
 158    SIG_UNBLOCK : constant := 1;
 159    SIG_SETMASK : constant := 2;
 160
 161    SIG_DFL : constant := 0;
 162    SIG_IGN : constant := 1;
 163
 164    function sigaction
 165      (sig  : Signal;
 166       act  : struct_sigaction_ptr;
 167       oact : struct_sigaction_ptr) return int;
 168    pragma Import (C, sigaction, "sigaction");
 169
 170    ----------
 171    -- Time --
 172    ----------
 173
 174    Time_Slice_Supported : constant Boolean := True;
 175    --  Indicates wether time slicing is supported
 176
 177    type timespec is private;
 178
 179    type clockid_t is private;
 180
 181    CLOCK_REALTIME : constant clockid_t;
 182
 183    function clock_gettime
 184      (clock_id : clockid_t;
 185       tp       : access timespec) return int;
 186    pragma Inline (clock_gettime);
 187    --  LynxOS has non standard clock_gettime
 188
 189    function To_Duration (TS : timespec) return Duration;
 190    pragma Inline (To_Duration);
 191
 192    function To_Timespec (D : Duration) return timespec;
 193    pragma Inline (To_Timespec);
 194
 195    type struct_timezone is record
 196       tz_minuteswest : int;
 197       tz_dsttime     : int;
 198    end record;
 199    pragma Convention (C, struct_timezone);
 200    type struct_timezone_ptr is access all struct_timezone;
 201
 202    type struct_timeval is private;
 203    --  This is needed on systems that do not have clock_gettime()
 204    --  but do have gettimeofday().
 205
 206    function To_Duration (TV : struct_timeval) return Duration;
 207    pragma Inline (To_Duration);
 208
 209    function To_Timeval (D : Duration) return struct_timeval;
 210    pragma Inline (To_Timeval);
 211
 212    -------------------------
 213    -- Priority Scheduling --
 214    -------------------------
 215
 216    SCHED_FIFO  : constant := 16#00200000#;
 217    SCHED_RR    : constant := 16#00100000#;
 218    SCHED_OTHER : constant := 16#00400000#;
 219
 220    -------------
 221    -- Process --
 222    -------------
 223
 224    type pid_t is private;
 225
 226    function kill (pid : pid_t; sig : Signal) return int;
 227    pragma Import (C, kill, "kill");
 228
 229    function getpid return pid_t;
 230    pragma Import (C, getpid, "getpid");
 231
 232    ---------
 233    -- LWP --
 234    ---------
 235
 236    function lwp_self return System.Address;
 237    --  lwp_self does not exist on this thread library, revert to pthread_self
 238    --  which is the closest approximation (with getpid). This function is
 239    --  needed to share 7staprop.adb across POSIX-like targets.
 240    pragma Import (C, lwp_self, "pthread_self");
 241
 242    -------------
 243    -- Threads --
 244    -------------
 245
 246    type Thread_Body is access
 247      function (arg : System.Address) return System.Address;
 248    type pthread_t           is private;
 249    subtype Thread_Id        is pthread_t;
 250
 251    type pthread_mutex_t     is limited private;
 252    type pthread_cond_t      is limited private;
 253    type st_t                is limited private;
 254    type pthread_attr_t      is limited private;
 255    type pthread_mutexattr_t is limited private;
 256    type pthread_condattr_t  is limited private;
 257    type pthread_key_t       is private;
 258
 259    PTHREAD_CREATE_DETACHED : constant := 0;
 260
 261    -----------
 262    -- Stack --
 263    -----------
 264
 265    Stack_Base_Available : constant Boolean := False;
 266    --  Indicates wether the stack base is available on this target.
 267
 268    function Get_Stack_Base (thread : pthread_t) return Address;
 269    pragma Inline (Get_Stack_Base);
 270    --  returns the stack base of the specified thread.
 271    --  Only call this function when Stack_Base_Available is True.
 272
 273    function Get_Page_Size return size_t;
 274    function Get_Page_Size return Address;
 275    pragma Import (C, Get_Page_Size, "getpagesize");
 276    --  returns the size of a page, or 0 if this is not relevant on this
 277    --  target
 278
 279    PROT_NONE  : constant := 0;
 280    PROT_READ  : constant := 1;
 281    PROT_WRITE : constant := 2;
 282    PROT_EXEC  : constant := 4;
 283    PROT_USER  : constant := 8;
 284    PROT_ALL   : constant := PROT_READ + PROT_WRITE + PROT_EXEC + PROT_USER;
 285
 286    PROT_ON    : constant := PROT_READ;
 287    PROT_OFF   : constant := PROT_ALL;
 288
 289    function mprotect (addr : Address; len : size_t; prot : int) return int;
 290    pragma Import (C, mprotect);
 291
 292    -------------------------
 293    -- POSIX.1c  Section 3 --
 294    -------------------------
 295
 296    function sigwait
 297      (set : access sigset_t;
 298       sig : access Signal) return int;
 299    pragma Inline (sigwait);
 300    --  LynxOS has non standard sigwait
 301
 302    function pthread_kill (thread : pthread_t; sig : Signal) return int;
 303    pragma Import (C, pthread_kill, "pthread_kill");
 304
 305    type sigset_t_ptr is access all sigset_t;
 306
 307    function pthread_sigmask
 308      (how  : int;
 309       set  : sigset_t_ptr;
 310       oset : sigset_t_ptr) return int;
 311    pragma Import (C, pthread_sigmask, "sigprocmask");
 312
 313    --------------------------
 314    -- POSIX.1c  Section 11 --
 315    --------------------------
 316
 317    function pthread_mutexattr_init
 318      (attr : access pthread_mutexattr_t) return int;
 319    pragma Inline (pthread_mutexattr_init);
 320    --  LynxOS has a nonstandard pthread_mutexattr_init
 321
 322    function pthread_mutexattr_destroy
 323      (attr : access pthread_mutexattr_t) return int;
 324    pragma Inline (pthread_mutexattr_destroy);
 325    --  Lynxos has a nonstandard pthread_mutexattr_destroy
 326
 327    function pthread_mutex_init
 328      (mutex : access pthread_mutex_t;
 329       attr  : access pthread_mutexattr_t) return int;
 330    pragma Inline (pthread_mutex_init);
 331    --  LynxOS has a nonstandard pthread_mutex_init
 332
 333    function pthread_mutex_destroy (mutex : access pthread_mutex_t) return int;
 334    pragma Inline (pthread_mutex_destroy);
 335    --  LynxOS has a nonstandard pthread_mutex_destroy
 336
 337    function pthread_mutex_lock (mutex : access pthread_mutex_t) return int;
 338    pragma Inline (pthread_mutex_lock);
 339    --  LynxOS has a nonstandard pthread_mutex_lock
 340
 341    function pthread_mutex_unlock (mutex : access pthread_mutex_t) return int;
 342    pragma Inline (pthread_mutex_unlock);
 343    --  LynxOS has a nonstandard pthread_mutex_unlock
 344
 345    function pthread_condattr_init
 346      (attr : access pthread_condattr_t) return int;
 347    pragma Inline (pthread_condattr_init);
 348    --  LynxOS has a nonstandard pthread_condattr_init
 349
 350    function pthread_condattr_destroy
 351      (attr : access pthread_condattr_t) return int;
 352    pragma Inline (pthread_condattr_destroy);
 353    --  LynxOS has a nonstandard pthread_condattr_destroy
 354
 355    function pthread_cond_init
 356      (cond : access pthread_cond_t;
 357       attr : access pthread_condattr_t) return int;
 358    pragma Inline (pthread_cond_init);
 359    --  LynxOS has a non standard pthread_cond_init
 360
 361    function pthread_cond_destroy (cond : access pthread_cond_t) return int;
 362    pragma Inline (pthread_cond_destroy);
 363    --  LynxOS has a nonstandard pthread_cond_destroy
 364
 365    function pthread_cond_signal (cond : access pthread_cond_t) return int;
 366    pragma Inline (pthread_cond_signal);
 367    --  LynxOS has a nonstandard pthread_cond_signal
 368
 369    function pthread_cond_wait
 370      (cond  : access pthread_cond_t;
 371       mutex : access pthread_mutex_t) return int;
 372    pragma Inline (pthread_cond_wait);
 373    --  LynxOS has a nonstandard pthread_cond_wait
 374
 375    function pthread_cond_timedwait
 376      (cond    : access pthread_cond_t;
 377       mutex   : access pthread_mutex_t;
 378       reltime : access timespec) return int;
 379    pragma Inline (pthread_cond_timedwait);
 380    --  LynxOS has a nonstandard pthrad_cond_timedwait
 381
 382    Relative_Timed_Wait : constant Boolean := True;
 383    --  pthread_cond_timedwait requires a relative delay time
 384
 385    --------------------------
 386    -- POSIX.1c  Section 13 --
 387    --------------------------
 388
 389    PTHREAD_PRIO_NONE    : constant := 0;
 390    PTHREAD_PRIO_INHERIT : constant := 0;
 391    PTHREAD_PRIO_PROTECT : constant := 0;
 392
 393    type struct_sched_param is record
 394       sched_priority : int;  --  scheduling priority
 395    end record;
 396
 397    function pthread_setschedparam
 398      (thread : pthread_t;
 399       policy : int;
 400       param  : access struct_sched_param) return int;
 401    pragma Inline (pthread_setschedparam);
 402    --  LynxOS doesn't have pthread_setschedparam.
 403    --  Instead, use pthread_setscheduler
 404
 405    function pthread_mutexattr_setprotocol
 406      (attr     : access pthread_mutexattr_t;
 407       protocol : int) return int;
 408    pragma Inline (pthread_mutexattr_setprotocol);
 409    --  LynxOS doesn't have pthread_mutexattr_setprotocol
 410
 411    function pthread_mutexattr_setprioceiling
 412      (attr     : access pthread_mutexattr_t;
 413       prioceiling : int) return int;
 414    pragma Inline (pthread_mutexattr_setprioceiling);
 415    --  LynxOS doesn't have pthread_mutexattr_setprioceiling
 416
 417    function pthread_attr_setscope
 418      (attr            : access pthread_attr_t;
 419       contentionscope : int) return int;
 420    --  LynxOS doesn't have pthread_attr_setscope: all threads have system scope
 421    pragma Inline (pthread_attr_setscope);
 422
 423    function pthread_attr_setschedpolicy
 424      (attr   : access pthread_attr_t;
 425       policy : int) return int;
 426    pragma Import (C, pthread_attr_setschedpolicy, "pthread_attr_setsched");
 427
 428    function sched_yield return int;
 429    --   pragma Import (C, sched_yield, "sched_yield");
 430    pragma Inline (sched_yield);
 431
 432    ---------------------------
 433    -- P1003.1c - Section 16 --
 434    ---------------------------
 435
 436    function pthread_attr_init (attributes : access pthread_attr_t) return int;
 437    pragma Import (C, pthread_attr_init, "pthread_attr_create");
 438
 439    function pthread_attr_destroy
 440      (attributes : access pthread_attr_t) return int;
 441    pragma Import (C, pthread_attr_destroy, "pthread_attr_delete");
 442
 443    function pthread_attr_setdetachstate
 444      (attr        : access pthread_attr_t;
 445       detachstate : int) return int;
 446    pragma Inline (pthread_attr_setdetachstate);
 447    --  LynxOS doesn't have pthread_attr_setdetachstate
 448
 449    function pthread_attr_setstacksize
 450      (attr      : access pthread_attr_t;
 451       stacksize : size_t) return int;
 452    pragma Import (C, pthread_attr_setstacksize, "pthread_attr_setstacksize");
 453
 454    function pthread_create
 455      (thread        : access pthread_t;
 456       attributes    : access pthread_attr_t;
 457       start_routine : Thread_Body;
 458       arg           : System.Address) return int;
 459    pragma Inline (pthread_create);
 460    --  LynxOS has a non standard pthread_create
 461
 462    procedure pthread_exit (status : System.Address);
 463    pragma Import (C, pthread_exit, "pthread_exit");
 464
 465    function pthread_self return pthread_t;
 466    pragma Import (C, pthread_self, "pthread_self");
 467
 468    --------------------------
 469    -- POSIX.1c  Section 17 --
 470    --------------------------
 471
 472    function pthread_setspecific
 473      (key   : pthread_key_t;
 474       value : System.Address) return int;
 475    pragma Inline (pthread_setspecific);
 476    --  LynxOS has a non standard pthread_setspecific
 477
 478    function pthread_getspecific (key : pthread_key_t) return System.Address;
 479    pragma Inline (pthread_getspecific);
 480    --  LynxOS has a non standard pthread_getspecific
 481
 482    type destructor_pointer is access procedure (arg : System.Address);
 483
 484    function pthread_key_create
 485      (key        : access pthread_key_t;
 486       destructor : destructor_pointer) return int;
 487    pragma Inline (pthread_key_create);
 488    --  LynxOS has a non standard pthread_keycreate
 489
 490    procedure pthread_init;
 491    --  This is a dummy procedure to share some GNULLI files
 492
 493 private
 494
 495    type sigbit_array is array (1 .. 2) of long;
 496    type sigset_t is record
 497       sa_sigbits : sigbit_array;
 498    end record;
 499    pragma Convention (C_Pass_By_Copy, sigset_t);
 500
 501    type pid_t is new long;
 502
 503    type time_t is new long;
 504
 505    type timespec is record
 506       tv_sec  : time_t;
 507       tv_nsec : long;
 508    end record;
 509    pragma Convention (C, timespec);
 510
 511    type clockid_t is new unsigned_char;
 512    CLOCK_REALTIME : constant clockid_t := 0;
 513
 514    type struct_timeval is record
 515       tv_sec  : time_t;
 516       tv_usec : time_t;
 517    end record;
 518    pragma Convention (C, struct_timeval);
 519
 520    type st_t is record
 521       stksize      : int;
 522       prio         : int;
 523       inheritsched : int;
 524       state        : int;
 525       sched        : int;
 526    end record;
 527    pragma Convention (C, st_t);
 528
 529    type pthread_attr_t is record
 530       st                 : st_t;
 531       pthread_attr_scope : int;  --  ignored
 532    end record;
 533    pragma Convention (C, pthread_attr_t);
 534
 535    type pthread_condattr_t is new int;
 536
 537    type pthread_mutexattr_t is new int;
 538
 539    type tid_t is new short;
 540    type pthread_t is new tid_t;
 541
 542    type synch_ptr is access all pthread_mutex_t;
 543    type pthread_mutex_t is record
 544       w_count   : int;
 545       mut_owner : int;
 546       id        : unsigned;
 547       next      : synch_ptr;
 548    end record;
 549    pragma Convention (C, pthread_mutex_t);
 550
 551    type pthread_cond_t is new pthread_mutex_t;
 552
 553    type pthread_key_t is new int;
 554
 555 end System.OS_Interface;