gcc/ada/5bosinte.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) 1997-2001 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 AIX (Native THREADS) 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 ("-lpthreads");
  48    pragma Linker_Options ("-lc_r");
  49
  50    subtype int            is Interfaces.C.int;
  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 := 78;
  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    SIGIOT      : constant := 6; --  IOT instruction
  87    SIGABRT     : constant := 6; --  used by abort, replace SIGIOT in the future
  88    SIGEMT      : constant := 7; --  EMT instruction
  89    SIGFPE      : constant := 8; --  floating point exception
  90    SIGKILL     : constant := 9; --  kill (cannot be caught or ignored)
  91    SIGBUS      : constant := 10; --  bus error
  92    SIGSEGV     : constant := 11; --  segmentation violation
  93    SIGSYS      : constant := 12; --  bad argument to system call
  94    SIGPIPE     : constant := 13; --  write on a pipe with no one to read it
  95    SIGALRM     : constant := 14; --  alarm clock
  96    SIGTERM     : constant := 15; --  software termination signal from kill
  97    SIGUSR1     : constant := 30; --  user defined signal 1
  98    SIGUSR2     : constant := 31; --  user defined signal 2
  99    SIGCLD      : constant := 20; --  alias for SIGCHLD
 100    SIGCHLD     : constant := 20; --  child status change
 101    SIGPWR      : constant := 29; --  power-fail restart
 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 := 34; --  virtual timer expired
 112    SIGPROF     : constant := 32; --  profiling timer expired
 113    SIGXCPU     : constant := 24; --  CPU time limit exceeded
 114    SIGXFSZ     : constant := 25; --  filesize limit exceeded
 115    SIGWAITING  : constant := 39; --  m:n scheduling
 116
 117    --  the following signals are AIX specific
 118    SIGMSG      : constant := 27; -- input data is in the ring buffer
 119    SIGDANGER   : constant := 33; -- system crash imminent
 120    SIGMIGRATE  : constant := 35; -- migrate process
 121    SIGPRE      : constant := 36; -- programming exception
 122    SIGVIRT     : constant := 37; -- AIX virtual time alarm
 123    SIGALRM1    : constant := 38; -- m:n condition variables
 124    SIGKAP      : constant := 60; -- keep alive poll from native keyboard
 125    SIGGRANT    : constant := SIGKAP; -- monitor mode granted
 126    SIGRETRACT  : constant := 61; -- monitor mode should be relinguished
 127    SIGSOUND    : constant := 62; -- sound control has completed
 128    SIGSAK      : constant := 63; -- secure attention key
 129
 130    SIGADAABORT : constant := SIGTERM;
 131    --  Note: on other targets, we usually use SIGABRT, but on AiX, it
 132    --  appears that SIGABRT can't be used in sigwait(), so we use SIGTERM.
 133
 134    type Signal_Set is array (Natural range <>) of Signal;
 135
 136    Unmasked    : constant Signal_Set :=
 137      (SIGTRAP, SIGTTIN, SIGTTOU, SIGTSTP, SIGPROF);
 138    Reserved    : constant Signal_Set := (SIGABRT, SIGKILL, SIGSTOP);
 139
 140    type sigset_t is private;
 141
 142    function sigaddset (set : access sigset_t; sig : Signal) return int;
 143    pragma Import (C, sigaddset, "sigaddset");
 144
 145    function sigdelset (set : access sigset_t; sig : Signal) return int;
 146    pragma Import (C, sigdelset, "sigdelset");
 147
 148    function sigfillset (set : access sigset_t) return int;
 149    pragma Import (C, sigfillset, "sigfillset");
 150
 151    function sigismember (set : access sigset_t; sig : Signal) return int;
 152    pragma Import (C, sigismember, "sigismember");
 153
 154    function sigemptyset (set : access sigset_t) return int;
 155    pragma Import (C, sigemptyset, "sigemptyset");
 156
 157    type struct_sigaction is record
 158       sa_handler : System.Address;
 159       sa_mask    : sigset_t;
 160       sa_flags   : int;
 161    end record;
 162    pragma Convention (C, struct_sigaction);
 163    type struct_sigaction_ptr is access all struct_sigaction;
 164
 165
 166    SIG_BLOCK   : constant := 0;
 167    SIG_UNBLOCK : constant := 1;
 168    SIG_SETMASK : constant := 2;
 169
 170    SIG_DFL : constant := 0;
 171    SIG_IGN : constant := 1;
 172
 173    function sigaction
 174      (sig  : Signal;
 175       act  : struct_sigaction_ptr;
 176       oact : struct_sigaction_ptr) return int;
 177    pragma Import (C, sigaction, "sigaction");
 178
 179    ----------
 180    -- Time --
 181    ----------
 182
 183    Time_Slice_Supported : constant Boolean := False;
 184    --  Indicates wether time slicing is supported
 185
 186    type timespec is private;
 187
 188    type clockid_t is private;
 189
 190    CLOCK_REALTIME : constant clockid_t;
 191
 192    function clock_gettime
 193      (clock_id : clockid_t;
 194       tp       : access timespec) return int;
 195    --  AiX threads don't have clock_gettime
 196    --  We instead use gettimeofday()
 197
 198    function To_Duration (TS : timespec) return Duration;
 199    pragma Inline (To_Duration);
 200
 201    function To_Timespec (D : Duration) return timespec;
 202    pragma Inline (To_Timespec);
 203
 204    type struct_timezone is record
 205       tz_minuteswest : int;
 206       tz_dsttime     : int;
 207    end record;
 208    pragma Convention (C, struct_timezone);
 209    type struct_timezone_ptr is access all struct_timezone;
 210
 211    type struct_timeval is private;
 212    --  This is needed on systems that do not have clock_gettime()
 213    --  but do have gettimeofday().
 214
 215    function To_Duration (TV : struct_timeval) return Duration;
 216    pragma Inline (To_Duration);
 217
 218    function To_Timeval (D : Duration) return struct_timeval;
 219    pragma Inline (To_Timeval);
 220
 221    -------------------------
 222    -- Priority Scheduling --
 223    -------------------------
 224
 225    SCHED_FIFO  : constant := 1;
 226    SCHED_RR    : constant := 2;
 227    SCHED_OTHER : constant := 0;
 228
 229    -------------
 230    -- Process --
 231    -------------
 232
 233    type pid_t is private;
 234
 235    function kill (pid : pid_t; sig : Signal) return int;
 236    pragma Import (C, kill, "kill");
 237
 238    function getpid return pid_t;
 239    pragma Import (C, getpid, "getpid");
 240
 241    ---------
 242    -- LWP --
 243    ---------
 244
 245    function lwp_self return System.Address;
 246    pragma Import (C, lwp_self, "thread_self");
 247
 248    -------------
 249    -- Threads --
 250    -------------
 251
 252    type Thread_Body is access
 253      function (arg : System.Address) return System.Address;
 254    type pthread_t           is private;
 255    subtype Thread_Id        is pthread_t;
 256
 257    type pthread_mutex_t     is limited private;
 258    type pthread_cond_t      is limited private;
 259    type pthread_attr_t      is limited private;
 260    type pthread_mutexattr_t is limited private;
 261    type pthread_condattr_t  is limited private;
 262    type pthread_key_t       is private;
 263
 264    PTHREAD_CREATE_DETACHED : constant := 1;
 265
 266    -----------
 267    -- Stack --
 268    -----------
 269
 270    Stack_Base_Available : constant Boolean := False;
 271    --  Indicates wether the stack base is available on this target.
 272
 273    function Get_Stack_Base (thread : pthread_t) return Address;
 274    pragma Inline (Get_Stack_Base);
 275    --  returns the stack base of the specified thread.
 276    --  Only call this function when Stack_Base_Available is True.
 277
 278    function Get_Page_Size return size_t;
 279    function Get_Page_Size return Address;
 280    pragma Import (C, Get_Page_Size, "getpagesize");
 281    --  returns the size of a page, or 0 if this is not relevant on this
 282    --  target
 283
 284    PROT_NONE  : constant := 0;
 285    PROT_READ  : constant := 1;
 286    PROT_WRITE : constant := 2;
 287    PROT_EXEC  : constant := 4;
 288    PROT_ALL   : constant := PROT_READ + PROT_WRITE + PROT_EXEC;
 289
 290    PROT_ON    : constant := PROT_READ;
 291    PROT_OFF   : constant := PROT_ALL;
 292
 293    function mprotect (addr : Address; len : size_t; prot : int) return int;
 294    pragma Import (C, mprotect);
 295
 296    ---------------------------------------
 297    -- Nonstandard Thread Initialization --
 298    ---------------------------------------
 299
 300    --  Though not documented, pthread_init *must* be called before any other
 301    --  pthread call
 302
 303    procedure pthread_init;
 304    pragma Import (C, pthread_init, "pthread_init");
 305
 306    -------------------------
 307    -- POSIX.1c  Section 3 --
 308    -------------------------
 309
 310    function sigwait
 311      (set : access sigset_t;
 312       sig : access Signal) return int;
 313    pragma Import (C, sigwait, "sigwait");
 314
 315    function pthread_kill
 316      (thread : pthread_t;
 317       sig    : Signal) return int;
 318    pragma Import (C, pthread_kill, "pthread_kill");
 319
 320    type sigset_t_ptr is access all sigset_t;
 321
 322    function pthread_sigmask
 323      (how  : int;
 324       set  : sigset_t_ptr;
 325       oset : sigset_t_ptr) return int;
 326    pragma Import (C, pthread_sigmask, "sigthreadmask");
 327
 328    --------------------------
 329    -- POSIX.1c  Section 11 --
 330    --------------------------
 331
 332    function pthread_mutexattr_init
 333      (attr : access pthread_mutexattr_t) return int;
 334    pragma Import (C, pthread_mutexattr_init, "pthread_mutexattr_init");
 335
 336    function pthread_mutexattr_destroy
 337      (attr : access pthread_mutexattr_t) return int;
 338    pragma Import (C, pthread_mutexattr_destroy, "pthread_mutexattr_destroy");
 339
 340    function pthread_mutex_init
 341      (mutex : access pthread_mutex_t;
 342       attr  : access pthread_mutexattr_t) return int;
 343    pragma Import (C, pthread_mutex_init, "pthread_mutex_init");
 344
 345    function pthread_mutex_destroy (mutex : access pthread_mutex_t) return int;
 346    pragma Import (C, pthread_mutex_destroy, "pthread_mutex_destroy");
 347
 348    function pthread_mutex_lock (mutex : access pthread_mutex_t) return int;
 349    pragma Import (C, pthread_mutex_lock, "pthread_mutex_lock");
 350
 351    function pthread_mutex_unlock (mutex : access pthread_mutex_t) return int;
 352    pragma Import (C, pthread_mutex_unlock, "pthread_mutex_unlock");
 353
 354    function pthread_condattr_init
 355      (attr : access pthread_condattr_t) return int;
 356    pragma Import (C, pthread_condattr_init, "pthread_condattr_init");
 357
 358    function pthread_condattr_destroy
 359      (attr : access pthread_condattr_t) return int;
 360    pragma Import (C, pthread_condattr_destroy, "pthread_condattr_destroy");
 361
 362    function pthread_cond_init
 363      (cond : access pthread_cond_t;
 364       attr : access pthread_condattr_t) return int;
 365    pragma Import (C, pthread_cond_init, "pthread_cond_init");
 366
 367    function pthread_cond_destroy (cond : access pthread_cond_t) return int;
 368    pragma Import (C, pthread_cond_destroy, "pthread_cond_destroy");
 369
 370    function pthread_cond_signal (cond : access pthread_cond_t) return int;
 371    pragma Import (C, pthread_cond_signal, "pthread_cond_signal");
 372
 373    function pthread_cond_wait
 374      (cond  : access pthread_cond_t;
 375       mutex : access pthread_mutex_t) return int;
 376    pragma Import (C, pthread_cond_wait, "pthread_cond_wait");
 377
 378    function pthread_cond_timedwait
 379      (cond    : access pthread_cond_t;
 380       mutex   : access pthread_mutex_t;
 381       abstime : access timespec) return int;
 382    pragma Import (C, pthread_cond_timedwait, "pthread_cond_timedwait");
 383
 384    Relative_Timed_Wait : constant Boolean := False;
 385    --  pthread_cond_timedwait requires an absolute delay time
 386
 387    ----------------------------
 388    --  POSIX.1c  Section 13  --
 389    ----------------------------
 390
 391    PTHREAD_PRIO_NONE    : constant := 0;
 392    PTHREAD_PRIO_PROTECT : constant := 0;
 393    PTHREAD_PRIO_INHERIT : constant := 0;
 394
 395    function pthread_mutexattr_setprotocol
 396      (attr     : access pthread_mutexattr_t;
 397       protocol : int) return int;
 398    pragma Import (C, pthread_mutexattr_setprotocol);
 399
 400    function pthread_mutexattr_setprioceiling
 401      (attr        : access pthread_mutexattr_t;
 402       prioceiling : int) return int;
 403    pragma Import (C, pthread_mutexattr_setprioceiling);
 404
 405    type Array_5_Int is array (0 .. 5) of int;
 406    type struct_sched_param is record
 407       sched_priority : int;
 408       sched_policy   : int;
 409       sched_reserved : Array_5_Int;
 410    end record;
 411
 412    function pthread_setschedparam
 413      (thread : pthread_t;
 414       policy : int;
 415       param  : access struct_sched_param) return int;
 416    pragma Import (C, pthread_setschedparam, "pthread_setschedparam");
 417
 418    function pthread_attr_setscope
 419      (attr            : access pthread_attr_t;
 420       contentionscope : int) return int;
 421    pragma Import (C, pthread_attr_setscope, "pthread_attr_setscope");
 422
 423    function pthread_attr_setinheritsched
 424      (attr            : access pthread_attr_t;
 425       inheritsched : int) return int;
 426    pragma Import (C, pthread_attr_setinheritsched);
 427
 428    function pthread_attr_setschedpolicy
 429      (attr   : access pthread_attr_t;
 430       policy : int) return int;
 431    pragma Import (C, pthread_attr_setschedpolicy);
 432
 433    function pthread_attr_setschedparam
 434      (attr        : access pthread_attr_t;
 435       sched_param : int) return int;
 436    pragma Import (C, pthread_attr_setschedparam);
 437
 438    function sched_yield return int;
 439    --  AiX have a nonstandard sched_yield.
 440
 441    ---------------------------
 442    -- P1003.1c - Section 16 --
 443    ---------------------------
 444
 445    function pthread_attr_init (attributes : access pthread_attr_t) return int;
 446    pragma Import (C, pthread_attr_init, "pthread_attr_init");
 447
 448    function pthread_attr_destroy
 449      (attributes : access pthread_attr_t) return int;
 450    pragma Import (C, pthread_attr_destroy, "pthread_attr_destroy");
 451
 452    function pthread_attr_setdetachstate
 453      (attr        : access pthread_attr_t;
 454       detachstate : int) return int;
 455    pragma Import (C, pthread_attr_setdetachstate);
 456
 457    function pthread_attr_setstacksize
 458      (attr      : access pthread_attr_t;
 459       stacksize : size_t) return int;
 460    pragma Import (C, pthread_attr_setstacksize);
 461
 462    function pthread_create
 463      (thread        : access pthread_t;
 464       attributes    : access pthread_attr_t;
 465       start_routine : Thread_Body;
 466       arg           : System.Address)
 467      return int;
 468    pragma Import (C, pthread_create, "pthread_create");
 469
 470    procedure pthread_exit (status : System.Address);
 471    pragma Import (C, pthread_exit, "pthread_exit");
 472
 473    function pthread_self return pthread_t;
 474    pragma Import (C, pthread_self, "pthread_self");
 475
 476    --------------------------
 477    -- POSIX.1c  Section 17 --
 478    --------------------------
 479
 480    function pthread_setspecific
 481      (key   : pthread_key_t;
 482       value : System.Address) return int;
 483    pragma Import (C, pthread_setspecific, "pthread_setspecific");
 484
 485    function pthread_getspecific (key : pthread_key_t) return System.Address;
 486    pragma Import (C, pthread_getspecific, "pthread_getspecific");
 487
 488    type destructor_pointer is access
 489       procedure (arg : System.Address);
 490
 491    function pthread_key_create
 492      (key        : access pthread_key_t;
 493       destructor : destructor_pointer) return int;
 494    pragma Import (C, pthread_key_create, "pthread_key_create");
 495
 496 private
 497
 498    type sigset_t is record
 499       losigs : unsigned_long;
 500       hisigs : unsigned_long;
 501    end record;
 502    pragma Convention (C_Pass_By_Copy, sigset_t);
 503
 504    type pid_t is new int;
 505
 506    type time_t is new long;
 507
 508    type timespec is record
 509       tv_sec  : time_t;
 510       tv_nsec : long;
 511    end record;
 512    pragma Convention (C, timespec);
 513
 514    type clockid_t is new int;
 515    CLOCK_REALTIME : constant clockid_t := 0;
 516
 517    type struct_timeval is record
 518       tv_sec  : long;
 519       tv_usec : long;
 520    end record;
 521    pragma Convention (C, struct_timeval);
 522
 523    type pthread_attr_t is new System.Address;
 524    pragma Convention (C, pthread_attr_t);
 525    --  typedef struct __pt_attr        *pthread_attr_t;
 526
 527    type pthread_condattr_t is new System.Address;
 528    pragma Convention (C, pthread_condattr_t);
 529    --  typedef struct __pt_attr        *pthread_condattr_t;
 530
 531    type pthread_mutexattr_t is new System.Address;
 532    pragma Convention (C, pthread_mutexattr_t);
 533    --  typedef struct __pt_attr        *pthread_mutexattr_t;
 534
 535    type pthread_t is new System.Address;
 536    pragma Convention (C, pthread_t);
 537    --  typedef void    *pthread_t;
 538
 539    type ptq_queue;
 540    type ptq_queue_ptr is access all ptq_queue;
 541
 542    type ptq_queue is record
 543       ptq_next : ptq_queue_ptr;
 544       ptq_prev : ptq_queue_ptr;
 545    end record;
 546
 547    type Array_3_Int is array (0 .. 3) of int;
 548    type pthread_mutex_t is record
 549         link        : ptq_queue;
 550         ptmtx_lock  : int;
 551         ptmtx_flags : long;
 552         protocol    : int;
 553         prioceiling : int;
 554         ptmtx_owner : pthread_t;
 555         mtx_id      : int;
 556         attr        : pthread_attr_t;
 557         mtx_kind    : int;
 558         lock_cpt    : int;
 559         reserved    : Array_3_Int;
 560    end record;
 561    pragma Convention (C, pthread_mutex_t);
 562    type pthread_mutex_t_ptr is access pthread_mutex_t;
 563
 564    type pthread_cond_t is record
 565       link         : ptq_queue;
 566       ptcv_lock    : int;
 567       ptcv_flags   : long;
 568       ptcv_waiters : ptq_queue;
 569       cv_id        : int;
 570       attr         : pthread_attr_t;
 571       mutex        : pthread_mutex_t_ptr;
 572       cptwait      : int;
 573       reserved     : int;
 574    end record;
 575    pragma Convention (C, pthread_cond_t);
 576
 577    type pthread_key_t is new unsigned;
 578
 579 end System.OS_Interface;