gcc/ada/5uosinte.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) 1997-2001, 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 Sun OS (FSU 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 ("-lgthreads");
  49    pragma Linker_Options ("-lmalloc");
  50
  51    subtype int            is Interfaces.C.int;
  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 := 31;
  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 := 30; --  user defined signal 1
  99    SIGUSR2    : constant := 31; --  user defined signal 2
 100    SIGCLD     : constant := 20; --  alias for SIGCHLD
 101    SIGCHLD    : constant := 20; --  child status change
 102    SIGWINCH   : constant := 28; --  window size change
 103    SIGURG     : constant := 16; --  urgent condition on IO channel
 104    SIGPOLL    : constant := 23; --  pollable event occurred
 105    SIGIO      : constant := 23; --  I/O possible (Solaris SIGPOLL alias)
 106    SIGSTOP    : constant := 17; --  stop (cannot be caught or ignored)
 107    SIGTSTP    : constant := 18; --  user stop requested from tty
 108    SIGCONT    : constant := 19; --  stopped process has been continued
 109    SIGTTIN    : constant := 21; --  background tty read attempted
 110    SIGTTOU    : constant := 22; --  background tty write attempted
 111    SIGVTALRM  : constant := 26; --  virtual timer expired
 112    SIGPROF    : constant := 27; --  profiling timer expired
 113    SIGXCPU    : constant := 24; --  CPU time limit exceeded
 114    SIGXFSZ    : constant := 25; --  filesize limit exceeded
 115
 116    type sigset_t is private;
 117
 118    function sigaddset (set : access sigset_t; sig : Signal) return int;
 119    pragma Import (C, sigaddset, "sigaddset");
 120
 121    function sigdelset (set : access sigset_t; sig : Signal) return int;
 122    pragma Import (C, sigdelset, "sigdelset");
 123
 124    function sigfillset (set : access sigset_t) return int;
 125    pragma Import (C, sigfillset, "sigfillset");
 126
 127    function sigismember (set : access sigset_t; sig : Signal) return int;
 128    pragma Import (C, sigismember, "sigismember");
 129
 130    function sigemptyset (set : access sigset_t) return int;
 131    pragma Import (C, sigemptyset, "sigemptyset");
 132
 133    type struct_sigaction is record
 134       sa_handler : System.Address;
 135       sa_mask    : sigset_t;
 136       sa_flags   : int;
 137    end record;
 138    pragma Convention (C, struct_sigaction);
 139    type struct_sigaction_ptr is access all struct_sigaction;
 140
 141    SIG_BLOCK   : constant := 1;
 142    SIG_UNBLOCK : constant := 2;
 143    SIG_SETMASK : constant := 4;
 144
 145    SIG_DFL : constant := 0;
 146    SIG_IGN : constant := 1;
 147
 148    function sigaction
 149      (sig  : Signal;
 150       act  : struct_sigaction_ptr;
 151       oact : struct_sigaction_ptr) return int;
 152    pragma Import (C, sigaction, "sigaction");
 153
 154    ----------
 155    -- Time --
 156    ----------
 157
 158    Time_Slice_Supported : constant Boolean := False;
 159    --  Indicates wether time slicing is supported (i.e FSU threads have been
 160    --  compiled with DEF_RR)
 161
 162    type timespec is private;
 163
 164    type clockid_t is private;
 165
 166    CLOCK_REALTIME : constant clockid_t;
 167
 168    function clock_gettime
 169      (clock_id : clockid_t;
 170       tp       : access timespec) return int;
 171    pragma Import (C, clock_gettime, "clock_gettime");
 172
 173    function To_Duration (TS : timespec) return Duration;
 174    pragma Inline (To_Duration);
 175
 176    function To_Timespec (D : Duration) return timespec;
 177    pragma Inline (To_Timespec);
 178
 179    type struct_timeval is private;
 180
 181    function To_Duration (TV : struct_timeval) return Duration;
 182    pragma Inline (To_Duration);
 183
 184    function To_Timeval (D : Duration) return struct_timeval;
 185    pragma Inline (To_Timeval);
 186
 187    -------------------------
 188    -- Priority Scheduling --
 189    -------------------------
 190
 191    SCHED_FIFO  : constant := 0;
 192    SCHED_RR    : constant := 1;
 193    SCHED_OTHER : constant := 2;
 194
 195    -------------
 196    -- Process --
 197    -------------
 198
 199    type pid_t is private;
 200
 201    function kill (pid : pid_t; sig : Signal) return int;
 202    pragma Import (C, kill, "kill");
 203
 204    function getpid return pid_t;
 205    pragma Import (C, getpid, "getpid");
 206
 207    ---------
 208    -- LWP --
 209    ---------
 210
 211    function lwp_self return System.Address;
 212    --  lwp_self does not exist on this thread library, revert to pthread_self
 213    --  which is the closest approximation (with getpid). This function is
 214    --  needed to share 7staprop.adb across POSIX-like targets.
 215    pragma Import (C, lwp_self, "pthread_self");
 216
 217    -------------
 218    -- Threads --
 219    -------------
 220
 221    type Thread_Body is access
 222      function (arg : System.Address) return System.Address;
 223    type pthread_t           is private;
 224    subtype Thread_Id        is pthread_t;
 225
 226    type pthread_mutex_t     is limited private;
 227    type pthread_cond_t      is limited private;
 228    type pthread_attr_t      is limited private;
 229    type pthread_mutexattr_t is limited private;
 230    type pthread_condattr_t  is limited private;
 231    type pthread_key_t       is private;
 232
 233    PTHREAD_CREATE_DETACHED : constant := 1;
 234
 235    -----------
 236    -- Stack --
 237    -----------
 238
 239    Stack_Base_Available : constant Boolean := False;
 240    --  Indicates wether the stack base is available on this target.
 241    --  This allows us to share s-osinte.adb between all the FSU run time.
 242    --  Note that this value can only be true if pthread_t has a complete
 243    --  definition that corresponds exactly to the C header files.
 244
 245    function Get_Stack_Base (thread : pthread_t) return Address;
 246    pragma Inline (Get_Stack_Base);
 247    --  returns the stack base of the specified thread.
 248    --  Only call this function when Stack_Base_Available is True.
 249
 250    function Get_Page_Size return size_t;
 251    function Get_Page_Size return Address;
 252    pragma Import (C, Get_Page_Size, "getpagesize");
 253    --  returns the size of a page, or 0 if this is not relevant on this
 254    --  target
 255
 256    PROT_NONE  : constant := 0;
 257    PROT_READ  : constant := 1;
 258    PROT_WRITE : constant := 2;
 259    PROT_EXEC  : constant := 4;
 260    PROT_ALL   : constant := PROT_READ + PROT_WRITE + PROT_EXEC;
 261
 262    PROT_ON    : constant := PROT_NONE;
 263    PROT_OFF   : constant := PROT_ALL;
 264
 265    function mprotect (addr : Address; len : size_t; prot : int) return int;
 266    pragma Import (C, mprotect);
 267
 268    ---------------------------------------
 269    -- Nonstandard Thread Initialization --
 270    ---------------------------------------
 271    --  FSU_THREADS requires pthread_init, which is nonstandard
 272    --  and this should be invoked during the elaboration of s-taprop.adb
 273    procedure pthread_init;
 274    pragma Import (C, pthread_init, "pthread_init");
 275
 276    -------------------------
 277    -- POSIX.1c  Section 3 --
 278    -------------------------
 279
 280    function sigwait (set : access sigset_t; sig : access Signal) return int;
 281    --  FSU_THREADS has a nonstandard sigwait
 282
 283    function pthread_kill (thread : pthread_t; sig : Signal) return int;
 284    pragma Import (C, pthread_kill, "pthread_kill");
 285
 286    --  FSU threads does not have pthread_sigmask. Instead, it uses
 287    --  sigprocmask to do the signal handling when the thread library is
 288    --  sucked in.
 289
 290    type sigset_t_ptr is access all sigset_t;
 291
 292    function pthread_sigmask
 293      (how  : int;
 294       set  : sigset_t_ptr;
 295       oset : sigset_t_ptr) return int;
 296    pragma Import (C, pthread_sigmask, "sigprocmask");
 297
 298    --------------------------
 299    -- POSIX.1c  Section 11 --
 300    --------------------------
 301
 302    function pthread_mutexattr_init
 303      (attr : access pthread_mutexattr_t) return int;
 304    pragma Import (C, pthread_mutexattr_init, "pthread_mutexattr_init");
 305
 306    function pthread_mutexattr_destroy
 307      (attr : access pthread_mutexattr_t) return int;
 308    pragma Import (C, pthread_mutexattr_destroy, "pthread_mutexattr_destroy");
 309
 310    function pthread_mutex_init
 311      (mutex : access pthread_mutex_t;
 312       attr  : access pthread_mutexattr_t) return int;
 313    pragma Import (C, pthread_mutex_init, "pthread_mutex_init");
 314
 315    function pthread_mutex_destroy (mutex : access pthread_mutex_t) return int;
 316    pragma Import (C, pthread_mutex_destroy, "pthread_mutex_destroy");
 317
 318    function pthread_mutex_lock (mutex : access pthread_mutex_t) return int;
 319    --  FSU_THREADS has nonstandard pthread_mutex_lock
 320
 321    function pthread_mutex_unlock (mutex : access pthread_mutex_t) return int;
 322    --  FSU_THREADS has nonstandard pthread_mutex_lock
 323
 324    function pthread_condattr_init
 325      (attr : access pthread_condattr_t) return int;
 326    pragma Import (C, pthread_condattr_init, "pthread_condattr_init");
 327
 328    function pthread_condattr_destroy
 329      (attr : access pthread_condattr_t) return int;
 330    pragma Import (C, pthread_condattr_destroy, "pthread_condattr_destroy");
 331
 332    function pthread_cond_init
 333      (cond : access pthread_cond_t;
 334       attr : access pthread_condattr_t) return int;
 335    pragma Import (C, pthread_cond_init, "pthread_cond_init");
 336
 337    function pthread_cond_destroy (cond : access pthread_cond_t) return int;
 338    pragma Import (C, pthread_cond_destroy, "pthread_cond_destroy");
 339
 340    function pthread_cond_signal (cond : access pthread_cond_t) return int;
 341    pragma Import (C, pthread_cond_signal, "pthread_cond_signal");
 342
 343    function pthread_cond_wait
 344      (cond  : access pthread_cond_t;
 345       mutex : access pthread_mutex_t) return int;
 346    --  FSU_THREADS has a nonstandard pthread_cond_wait
 347
 348    function pthread_cond_timedwait
 349      (cond    : access pthread_cond_t;
 350       mutex   : access pthread_mutex_t;
 351       abstime : access timespec) return int;
 352    --  FSU_THREADS has a nonstandard pthread_cond_timedwait
 353
 354    Relative_Timed_Wait : constant Boolean := False;
 355    --  pthread_cond_timedwait requires an absolute delay time
 356
 357    --------------------------
 358    -- POSIX.1c  Section 13 --
 359    --------------------------
 360
 361    PTHREAD_PRIO_NONE    : constant := 0;
 362    PTHREAD_PRIO_PROTECT : constant := 2;
 363    PTHREAD_PRIO_INHERIT : constant := 1;
 364
 365    function pthread_mutexattr_setprotocol
 366      (attr     : access pthread_mutexattr_t;
 367       protocol : int) return int;
 368    pragma Import (C, pthread_mutexattr_setprotocol);
 369
 370    function pthread_mutexattr_setprioceiling
 371      (attr     : access pthread_mutexattr_t;
 372       prioceiling : int) return int;
 373    pragma Import
 374      (C, pthread_mutexattr_setprioceiling,
 375       "pthread_mutexattr_setprio_ceiling");
 376
 377    type struct_sched_param is record
 378       sched_priority : int;  --  scheduling priority
 379    end record;
 380
 381    function pthread_setschedparam
 382      (thread : pthread_t;
 383       policy : int;
 384       param  : access struct_sched_param) return int;
 385    --  FSU_THREADS does not have pthread_setschedparam
 386
 387    function pthread_attr_setscope
 388      (attr            : access pthread_attr_t;
 389       contentionscope : int) return int;
 390    pragma Import (C, pthread_attr_setscope, "pthread_attr_setscope");
 391
 392    function pthread_attr_setinheritsched
 393      (attr            : access pthread_attr_t;
 394       inheritsched : int) return int;
 395    pragma Import (C, pthread_attr_setinheritsched);
 396
 397    function pthread_attr_setschedpolicy
 398      (attr   : access pthread_attr_t;
 399       policy : int) return int;
 400    pragma Import (C, pthread_attr_setschedpolicy, "pthread_attr_setsched");
 401
 402    function pthread_attr_setschedparam
 403      (attr        : access pthread_attr_t;
 404       sched_param : int) return int;
 405    pragma Import (C, pthread_attr_setschedparam, "pthread_attr_setschedparam");
 406
 407    function sched_yield return int;
 408    --  FSU_THREADS does not have sched_yield;
 409
 410    ---------------------------
 411    -- P1003.1c - Section 16 --
 412    ---------------------------
 413
 414    function pthread_attr_init (attributes : access pthread_attr_t) return int;
 415    pragma Import (C, pthread_attr_init, "pthread_attr_init");
 416
 417    function pthread_attr_destroy
 418      (attributes : access pthread_attr_t) return int;
 419    pragma Import (C, pthread_attr_destroy, "pthread_attr_destroy");
 420
 421    function pthread_attr_setdetachstate
 422      (attr        : access pthread_attr_t;
 423       detachstate : int) return int;
 424    --  FSU_THREADS has a nonstandard pthread_attr_setdetachstate
 425
 426    function pthread_attr_setstacksize
 427      (attr      : access pthread_attr_t;
 428       stacksize : size_t) return int;
 429    pragma Import (C, pthread_attr_setstacksize, "pthread_attr_setstacksize");
 430
 431    function pthread_create
 432      (thread        : access pthread_t;
 433       attributes    : access pthread_attr_t;
 434       start_routine : Thread_Body;
 435       arg           : System.Address) return int;
 436    pragma Import (C, pthread_create, "pthread_create");
 437
 438    procedure pthread_exit (status : System.Address);
 439    pragma Import (C, pthread_exit, "pthread_exit");
 440
 441    function pthread_self return pthread_t;
 442    pragma Import (C, pthread_self, "pthread_self");
 443
 444    --------------------------
 445    -- POSIX.1c  Section 17 --
 446    --------------------------
 447
 448    function pthread_setspecific
 449      (key   : pthread_key_t;
 450       value : System.Address) return int;
 451    pragma Import (C, pthread_setspecific, "pthread_setspecific");
 452
 453    function pthread_getspecific (key : pthread_key_t) return System.Address;
 454    --  FSU_THREADS has a nonstandard pthread_getspecific
 455
 456    type destructor_pointer is access procedure (arg : System.Address);
 457
 458    function pthread_key_create
 459      (key        : access pthread_key_t;
 460       destructor : destructor_pointer)
 461      return int;
 462    pragma Import (C, pthread_key_create, "pthread_key_create");
 463
 464 private
 465
 466    type sigset_t is new int;
 467
 468    type pid_t is new int;
 469
 470    type time_t is new long;
 471
 472    type timespec is record
 473       tv_sec  : time_t;
 474       tv_nsec : long;
 475    end record;
 476    pragma Convention (C, timespec);
 477
 478    type clockid_t is new int;
 479    CLOCK_REALTIME : constant clockid_t := 0;
 480
 481    type struct_timeval is record
 482       tv_sec  : long;
 483       tv_usec : long;
 484    end record;
 485    pragma Convention (C, struct_timeval);
 486
 487    type pthread_attr_t is record
 488       flags           : int;
 489       stacksize       : int;
 490       contentionscope : int;
 491       inheritsched    : int;
 492       detachstate     : int;
 493       sched           : int;
 494       prio            : int;
 495       starttime       : timespec;
 496       deadline        : timespec;
 497       period          : timespec;
 498    end record;
 499    pragma Convention (C, pthread_attr_t);
 500
 501    type pthread_condattr_t is record
 502       flags : int;
 503    end record;
 504    pragma Convention (C, pthread_condattr_t);
 505
 506    type pthread_mutexattr_t is record
 507       flags        : int;
 508       prio_ceiling : int;
 509       protocol     : int;
 510    end record;
 511    pragma Convention (C, pthread_mutexattr_t);
 512
 513    type sigjmp_buf is array (Integer range 0 .. 9) of int;
 514
 515    type pthread_t_struct is record
 516       context    : sigjmp_buf;
 517       pbody      : sigjmp_buf;
 518       errno      : int;
 519       ret        : int;
 520       stack_base : System.Address;
 521    end record;
 522    pragma Convention (C, pthread_t_struct);
 523
 524    type pthread_t is access all pthread_t_struct;
 525
 526    type queue_t is record
 527       head : System.Address;
 528       tail : System.Address;
 529    end record;
 530    pragma Convention (C, queue_t);
 531
 532    type pthread_mutex_t is record
 533       queue                 : queue_t;
 534       lock                  : plain_char;
 535       owner                 : System.Address;
 536       flags                 : int;
 537       prio_ceiling          : int;
 538       protocol              : int;
 539       prev_max_ceiling_prio : int;
 540    end record;
 541    pragma Convention (C, pthread_mutex_t);
 542
 543    type pthread_cond_t is record
 544       queue        : queue_t;
 545       flags        : int;
 546       waiters      : int;
 547       mutex        : System.Address;
 548    end record;
 549    pragma Convention (C, pthread_cond_t);
 550
 551    type pthread_key_t is new int;
 552
 553 end System.OS_Interface;