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 --                                                                          --
  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 AIX (Native 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 ("-lpthreads");
  49    pragma Linker_Options ("-lc_r");
  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 := 78;
  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    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    SIGPWR      : constant := 29; --  power-fail restart
 103    SIGWINCH    : constant := 28; --  window size change
 104    SIGURG      : constant := 16; --  urgent condition on IO channel
 105    SIGPOLL     : constant := 23; --  pollable event occurred
 106    SIGIO       : constant := 23; --  I/O possible (Solaris SIGPOLL alias)
 107    SIGSTOP     : constant := 17; --  stop (cannot be caught or ignored)
 108    SIGTSTP     : constant := 18; --  user stop requested from tty
 109    SIGCONT     : constant := 19; --  stopped process has been continued
 110    SIGTTIN     : constant := 21; --  background tty read attempted
 111    SIGTTOU     : constant := 22; --  background tty write attempted
 112    SIGVTALRM   : constant := 34; --  virtual timer expired
 113    SIGPROF     : constant := 32; --  profiling timer expired
 114    SIGXCPU     : constant := 24; --  CPU time limit exceeded
 115    SIGXFSZ     : constant := 25; --  filesize limit exceeded
 116    SIGWAITING  : constant := 39; --  m:n scheduling
 117
 118    --  the following signals are AIX specific
 119    SIGMSG      : constant := 27; -- input data is in the ring buffer
 120    SIGDANGER   : constant := 33; -- system crash imminent
 121    SIGMIGRATE  : constant := 35; -- migrate process
 122    SIGPRE      : constant := 36; -- programming exception
 123    SIGVIRT     : constant := 37; -- AIX virtual time alarm
 124    SIGALRM1    : constant := 38; -- m:n condition variables
 125    SIGKAP      : constant := 60; -- keep alive poll from native keyboard
 126    SIGGRANT    : constant := SIGKAP; -- monitor mode granted
 127    SIGRETRACT  : constant := 61; -- monitor mode should be relinguished
 128    SIGSOUND    : constant := 62; -- sound control has completed
 129    SIGSAK      : constant := 63; -- secure attention key
 130
 131    SIGADAABORT : constant := SIGTERM;
 132    --  Note: on other targets, we usually use SIGABRT, but on AiX, it
 133    --  appears that SIGABRT can't be used in sigwait(), so we use SIGTERM.
 134
 135    type Signal_Set is array (Natural range <>) of Signal;
 136
 137    Unmasked    : constant Signal_Set :=
 138      (SIGTRAP, SIGTTIN, SIGTTOU, SIGTSTP, SIGPROF);
 139    Reserved    : constant Signal_Set := (SIGABRT, SIGKILL, SIGSTOP);
 140
 141    type sigset_t is private;
 142
 143    function sigaddset (set : access sigset_t; sig : Signal) return int;
 144    pragma Import (C, sigaddset, "sigaddset");
 145
 146    function sigdelset (set : access sigset_t; sig : Signal) return int;
 147    pragma Import (C, sigdelset, "sigdelset");
 148
 149    function sigfillset (set : access sigset_t) return int;
 150    pragma Import (C, sigfillset, "sigfillset");
 151
 152    function sigismember (set : access sigset_t; sig : Signal) return int;
 153    pragma Import (C, sigismember, "sigismember");
 154
 155    function sigemptyset (set : access sigset_t) return int;
 156    pragma Import (C, sigemptyset, "sigemptyset");
 157
 158    type struct_sigaction is record
 159       sa_handler : System.Address;
 160       sa_mask    : sigset_t;
 161       sa_flags   : int;
 162    end record;
 163    pragma Convention (C, struct_sigaction);
 164    type struct_sigaction_ptr is access all struct_sigaction;
 165
 166
 167    SIG_BLOCK   : constant := 0;
 168    SIG_UNBLOCK : constant := 1;
 169    SIG_SETMASK : constant := 2;
 170
 171    SIG_DFL : constant := 0;
 172    SIG_IGN : constant := 1;
 173
 174    function sigaction
 175      (sig  : Signal;
 176       act  : struct_sigaction_ptr;
 177       oact : struct_sigaction_ptr) return int;
 178    pragma Import (C, sigaction, "sigaction");
 179
 180    ----------
 181    -- Time --
 182    ----------
 183
 184    Time_Slice_Supported : constant Boolean := False;
 185    --  Indicates wether time slicing is supported
 186
 187    type timespec is private;
 188
 189    type clockid_t is private;
 190
 191    CLOCK_REALTIME : constant clockid_t;
 192
 193    function clock_gettime
 194      (clock_id : clockid_t;
 195       tp       : access timespec) return int;
 196    --  AiX threads don't have clock_gettime
 197    --  We instead use gettimeofday()
 198
 199    function To_Duration (TS : timespec) return Duration;
 200    pragma Inline (To_Duration);
 201
 202    function To_Timespec (D : Duration) return timespec;
 203    pragma Inline (To_Timespec);
 204
 205    type struct_timezone is record
 206       tz_minuteswest : int;
 207       tz_dsttime     : int;
 208    end record;
 209    pragma Convention (C, struct_timezone);
 210    type struct_timezone_ptr is access all struct_timezone;
 211
 212    type struct_timeval is private;
 213    --  This is needed on systems that do not have clock_gettime()
 214    --  but do have gettimeofday().
 215
 216    function To_Duration (TV : struct_timeval) return Duration;
 217    pragma Inline (To_Duration);
 218
 219    function To_Timeval (D : Duration) return struct_timeval;
 220    pragma Inline (To_Timeval);
 221
 222    -------------------------
 223    -- Priority Scheduling --
 224    -------------------------
 225
 226    SCHED_FIFO  : constant := 1;
 227    SCHED_RR    : constant := 2;
 228    SCHED_OTHER : constant := 0;
 229
 230    -------------
 231    -- Process --
 232    -------------
 233
 234    type pid_t is private;
 235
 236    function kill (pid : pid_t; sig : Signal) return int;
 237    pragma Import (C, kill, "kill");
 238
 239    function getpid return pid_t;
 240    pragma Import (C, getpid, "getpid");
 241
 242    ---------
 243    -- LWP --
 244    ---------
 245
 246    function lwp_self return System.Address;
 247    pragma Import (C, lwp_self, "thread_self");
 248
 249    -------------
 250    -- Threads --
 251    -------------
 252
 253    type Thread_Body is access
 254      function (arg : System.Address) return System.Address;
 255    type pthread_t           is private;
 256    subtype Thread_Id        is pthread_t;
 257
 258    type pthread_mutex_t     is limited private;
 259    type pthread_cond_t      is limited private;
 260    type pthread_attr_t      is limited private;
 261    type pthread_mutexattr_t is limited private;
 262    type pthread_condattr_t  is limited private;
 263    type pthread_key_t       is private;
 264
 265    PTHREAD_CREATE_DETACHED : constant := 1;
 266
 267    -----------
 268    -- Stack --
 269    -----------
 270
 271    Stack_Base_Available : constant Boolean := False;
 272    --  Indicates wether the stack base is available on this target.
 273
 274    function Get_Stack_Base (thread : pthread_t) return Address;
 275    pragma Inline (Get_Stack_Base);
 276    --  returns the stack base of the specified thread.
 277    --  Only call this function when Stack_Base_Available is True.
 278
 279    function Get_Page_Size return size_t;
 280    function Get_Page_Size return Address;
 281    pragma Import (C, Get_Page_Size, "getpagesize");
 282    --  returns the size of a page, or 0 if this is not relevant on this
 283    --  target
 284
 285    PROT_NONE  : constant := 0;
 286    PROT_READ  : constant := 1;
 287    PROT_WRITE : constant := 2;
 288    PROT_EXEC  : constant := 4;
 289    PROT_ALL   : constant := PROT_READ + PROT_WRITE + PROT_EXEC;
 290
 291    PROT_ON    : constant := PROT_READ;
 292    PROT_OFF   : constant := PROT_ALL;
 293
 294    function mprotect (addr : Address; len : size_t; prot : int) return int;
 295    pragma Import (C, mprotect);
 296
 297    ---------------------------------------
 298    -- Nonstandard Thread Initialization --
 299    ---------------------------------------
 300
 301    --  Though not documented, pthread_init *must* be called before any other
 302    --  pthread call
 303
 304    procedure pthread_init;
 305    pragma Import (C, pthread_init, "pthread_init");
 306
 307    -------------------------
 308    -- POSIX.1c  Section 3 --
 309    -------------------------
 310
 311    function sigwait
 312      (set : access sigset_t;
 313       sig : access Signal) return int;
 314    pragma Import (C, sigwait, "sigwait");
 315
 316    function pthread_kill
 317      (thread : pthread_t;
 318       sig    : Signal) return int;
 319    pragma Import (C, pthread_kill, "pthread_kill");
 320
 321    type sigset_t_ptr is access all sigset_t;
 322
 323    function pthread_sigmask
 324      (how  : int;
 325       set  : sigset_t_ptr;
 326       oset : sigset_t_ptr) return int;
 327    pragma Import (C, pthread_sigmask, "sigthreadmask");
 328
 329    --------------------------
 330    -- POSIX.1c  Section 11 --
 331    --------------------------
 332
 333    function pthread_mutexattr_init
 334      (attr : access pthread_mutexattr_t) return int;
 335    pragma Import (C, pthread_mutexattr_init, "pthread_mutexattr_init");
 336
 337    function pthread_mutexattr_destroy
 338      (attr : access pthread_mutexattr_t) return int;
 339    pragma Import (C, pthread_mutexattr_destroy, "pthread_mutexattr_destroy");
 340
 341    function pthread_mutex_init
 342      (mutex : access pthread_mutex_t;
 343       attr  : access pthread_mutexattr_t) return int;
 344    pragma Import (C, pthread_mutex_init, "pthread_mutex_init");
 345
 346    function pthread_mutex_destroy (mutex : access pthread_mutex_t) return int;
 347    pragma Import (C, pthread_mutex_destroy, "pthread_mutex_destroy");
 348
 349    function pthread_mutex_lock (mutex : access pthread_mutex_t) return int;
 350    pragma Import (C, pthread_mutex_lock, "pthread_mutex_lock");
 351
 352    function pthread_mutex_unlock (mutex : access pthread_mutex_t) return int;
 353    pragma Import (C, pthread_mutex_unlock, "pthread_mutex_unlock");
 354
 355    function pthread_condattr_init
 356      (attr : access pthread_condattr_t) return int;
 357    pragma Import (C, pthread_condattr_init, "pthread_condattr_init");
 358
 359    function pthread_condattr_destroy
 360      (attr : access pthread_condattr_t) return int;
 361    pragma Import (C, pthread_condattr_destroy, "pthread_condattr_destroy");
 362
 363    function pthread_cond_init
 364      (cond : access pthread_cond_t;
 365       attr : access pthread_condattr_t) return int;
 366    pragma Import (C, pthread_cond_init, "pthread_cond_init");
 367
 368    function pthread_cond_destroy (cond : access pthread_cond_t) return int;
 369    pragma Import (C, pthread_cond_destroy, "pthread_cond_destroy");
 370
 371    function pthread_cond_signal (cond : access pthread_cond_t) return int;
 372    pragma Import (C, pthread_cond_signal, "pthread_cond_signal");
 373
 374    function pthread_cond_wait
 375      (cond  : access pthread_cond_t;
 376       mutex : access pthread_mutex_t) return int;
 377    pragma Import (C, pthread_cond_wait, "pthread_cond_wait");
 378
 379    function pthread_cond_timedwait
 380      (cond    : access pthread_cond_t;
 381       mutex   : access pthread_mutex_t;
 382       abstime : access timespec) return int;
 383    pragma Import (C, pthread_cond_timedwait, "pthread_cond_timedwait");
 384
 385    Relative_Timed_Wait : constant Boolean := False;
 386    --  pthread_cond_timedwait requires an absolute delay time
 387
 388    ----------------------------
 389    --  POSIX.1c  Section 13  --
 390    ----------------------------
 391
 392    PTHREAD_PRIO_NONE    : constant := 0;
 393    PTHREAD_PRIO_PROTECT : constant := 0;
 394    PTHREAD_PRIO_INHERIT : constant := 0;
 395
 396    function pthread_mutexattr_setprotocol
 397      (attr     : access pthread_mutexattr_t;
 398       protocol : int) return int;
 399    pragma Import (C, pthread_mutexattr_setprotocol);
 400
 401    function pthread_mutexattr_setprioceiling
 402      (attr        : access pthread_mutexattr_t;
 403       prioceiling : int) return int;
 404    pragma Import (C, pthread_mutexattr_setprioceiling);
 405
 406    type Array_5_Int is array (0 .. 5) of int;
 407    type struct_sched_param is record
 408       sched_priority : int;
 409       sched_policy   : int;
 410       sched_reserved : Array_5_Int;
 411    end record;
 412
 413    function pthread_setschedparam
 414      (thread : pthread_t;
 415       policy : int;
 416       param  : access struct_sched_param) return int;
 417    pragma Import (C, pthread_setschedparam, "pthread_setschedparam");
 418
 419    function pthread_attr_setscope
 420      (attr            : access pthread_attr_t;
 421       contentionscope : int) return int;
 422    pragma Import (C, pthread_attr_setscope, "pthread_attr_setscope");
 423
 424    function pthread_attr_setinheritsched
 425      (attr            : access pthread_attr_t;
 426       inheritsched : int) return int;
 427    pragma Import (C, pthread_attr_setinheritsched);
 428
 429    function pthread_attr_setschedpolicy
 430      (attr   : access pthread_attr_t;
 431       policy : int) return int;
 432    pragma Import (C, pthread_attr_setschedpolicy);
 433
 434    function pthread_attr_setschedparam
 435      (attr        : access pthread_attr_t;
 436       sched_param : int) return int;
 437    pragma Import (C, pthread_attr_setschedparam);
 438
 439    function sched_yield return int;
 440    --  AiX have a nonstandard sched_yield.
 441
 442    ---------------------------
 443    -- P1003.1c - Section 16 --
 444    ---------------------------
 445
 446    function pthread_attr_init (attributes : access pthread_attr_t) return int;
 447    pragma Import (C, pthread_attr_init, "pthread_attr_init");
 448
 449    function pthread_attr_destroy
 450      (attributes : access pthread_attr_t) return int;
 451    pragma Import (C, pthread_attr_destroy, "pthread_attr_destroy");
 452
 453    function pthread_attr_setdetachstate
 454      (attr        : access pthread_attr_t;
 455       detachstate : int) return int;
 456    pragma Import (C, pthread_attr_setdetachstate);
 457
 458    function pthread_attr_setstacksize
 459      (attr      : access pthread_attr_t;
 460       stacksize : size_t) return int;
 461    pragma Import (C, pthread_attr_setstacksize);
 462
 463    function pthread_create
 464      (thread        : access pthread_t;
 465       attributes    : access pthread_attr_t;
 466       start_routine : Thread_Body;
 467       arg           : System.Address)
 468      return int;
 469    pragma Import (C, pthread_create, "pthread_create");
 470
 471    procedure pthread_exit (status : System.Address);
 472    pragma Import (C, pthread_exit, "pthread_exit");
 473
 474    function pthread_self return pthread_t;
 475    pragma Import (C, pthread_self, "pthread_self");
 476
 477    --------------------------
 478    -- POSIX.1c  Section 17 --
 479    --------------------------
 480
 481    function pthread_setspecific
 482      (key   : pthread_key_t;
 483       value : System.Address) return int;
 484    pragma Import (C, pthread_setspecific, "pthread_setspecific");
 485
 486    function pthread_getspecific (key : pthread_key_t) return System.Address;
 487    pragma Import (C, pthread_getspecific, "pthread_getspecific");
 488
 489    type destructor_pointer is access
 490       procedure (arg : System.Address);
 491
 492    function pthread_key_create
 493      (key        : access pthread_key_t;
 494       destructor : destructor_pointer) return int;
 495    pragma Import (C, pthread_key_create, "pthread_key_create");
 496
 497 private
 498
 499    type sigset_t is record
 500       losigs : unsigned_long;
 501       hisigs : unsigned_long;
 502    end record;
 503    pragma Convention (C_Pass_By_Copy, sigset_t);
 504
 505    type pid_t is new int;
 506
 507    type time_t is new long;
 508
 509    type timespec is record
 510       tv_sec  : time_t;
 511       tv_nsec : long;
 512    end record;
 513    pragma Convention (C, timespec);
 514
 515    type clockid_t is new int;
 516    CLOCK_REALTIME : constant clockid_t := 0;
 517
 518    type struct_timeval is record
 519       tv_sec  : long;
 520       tv_usec : long;
 521    end record;
 522    pragma Convention (C, struct_timeval);
 523
 524    type pthread_attr_t is new System.Address;
 525    pragma Convention (C, pthread_attr_t);
 526    --  typedef struct __pt_attr        *pthread_attr_t;
 527
 528    type pthread_condattr_t is new System.Address;
 529    pragma Convention (C, pthread_condattr_t);
 530    --  typedef struct __pt_attr        *pthread_condattr_t;
 531
 532    type pthread_mutexattr_t is new System.Address;
 533    pragma Convention (C, pthread_mutexattr_t);
 534    --  typedef struct __pt_attr        *pthread_mutexattr_t;
 535
 536    type pthread_t is new System.Address;
 537    pragma Convention (C, pthread_t);
 538    --  typedef void    *pthread_t;
 539
 540    type ptq_queue;
 541    type ptq_queue_ptr is access all ptq_queue;
 542
 543    type ptq_queue is record
 544       ptq_next : ptq_queue_ptr;
 545       ptq_prev : ptq_queue_ptr;
 546    end record;
 547
 548    type Array_3_Int is array (0 .. 3) of int;
 549    type pthread_mutex_t is record
 550         link        : ptq_queue;
 551         ptmtx_lock  : int;
 552         ptmtx_flags : long;
 553         protocol    : int;
 554         prioceiling : int;
 555         ptmtx_owner : pthread_t;
 556         mtx_id      : int;
 557         attr        : pthread_attr_t;
 558         mtx_kind    : int;
 559         lock_cpt    : int;
 560         reserved    : Array_3_Int;
 561    end record;
 562    pragma Convention (C, pthread_mutex_t);
 563    type pthread_mutex_t_ptr is access pthread_mutex_t;
 564
 565    type pthread_cond_t is record
 566       link         : ptq_queue;
 567       ptcv_lock    : int;
 568       ptcv_flags   : long;
 569       ptcv_waiters : ptq_queue;
 570       cv_id        : int;
 571       attr         : pthread_attr_t;
 572       mutex        : pthread_mutex_t_ptr;
 573       cptwait      : int;
 574       reserved     : int;
 575    end record;
 576    pragma Convention (C, pthread_cond_t);
 577
 578    type pthread_key_t is new unsigned;
 579
 580 end System.OS_Interface;