gcc/ada/53osinte.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.       --
  31 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  32 --                                                                          --
  33 ------------------------------------------------------------------------------
  34
  35 --  This is a HPUX 11.0 (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 ("-lpthread");
  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 := 238;
  72
  73    -------------
  74    -- Signals --
  75    -------------
  76
  77    Max_Interrupt : constant := 44;
  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 := 16; --  user defined signal 1
  98    SIGUSR2    : constant := 17; --  user defined signal 2
  99    SIGCLD     : constant := 18; --  alias for SIGCHLD
 100    SIGCHLD    : constant := 18; --  child status change
 101    SIGPWR     : constant := 19; --  power-fail restart
 102    SIGVTALRM  : constant := 20; --  virtual timer alarm
 103    SIGPROF    : constant := 21; --  profiling timer alarm
 104    SIGIO      : constant := 22; --  asynchronous I/O
 105    SIGPOLL    : constant := 22; --  pollable event occurred
 106    SIGWINCH   : constant := 23; --  window size change
 107    SIGSTOP    : constant := 24; --  stop (cannot be caught or ignored)
 108    SIGTSTP    : constant := 25; --  user stop requested from tty
 109    SIGCONT    : constant := 26; --  stopped process has been continued
 110    SIGTTIN    : constant := 27; --  background tty read attempted
 111    SIGTTOU    : constant := 28; --  background tty write attempted
 112    SIGURG     : constant := 29; --  urgent condition on IO channel
 113    SIGLOST    : constant := 30; --  remote lock lost  (NFS)
 114    SIGDIL     : constant := 32; --  DIL signal
 115    SIGXCPU    : constant := 33; --  CPU time limit exceeded (setrlimit)
 116    SIGXFSZ    : constant := 34; --  file size limit exceeded (setrlimit)
 117    SIGCANCEL  : constant := 35; --  used for pthread cancellation.
 118    SIGGFAULT  : constant := 36; --  Graphics framebuffer fault
 119
 120    SIGADAABORT : constant := SIGABRT;
 121    --  Note: on other targets, we usually use SIGABRT, but on HPUX, it
 122    --  appears that SIGABRT can't be used in sigwait(), so we use SIGTERM.
 123
 124    type Signal_Set is array (Natural range <>) of Signal;
 125
 126    Unmasked    : constant Signal_Set :=
 127      (SIGABRT, SIGPIPE, SIGBUS, SIGTRAP, SIGTTIN, SIGTTOU, SIGTSTP, SIGPROF,
 128       SIGALRM, SIGVTALRM, SIGIO, SIGCHLD);
 129
 130    Reserved    : constant Signal_Set := (SIGKILL, SIGSTOP);
 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 Import (C, clock_gettime, "clock_gettime");
 187
 188    function To_Duration (TS : timespec) return Duration;
 189    pragma Inline (To_Duration);
 190
 191    function To_Timespec (D : Duration) return timespec;
 192    pragma Inline (To_Timespec);
 193
 194    type struct_timezone is record
 195       tz_minuteswest : int;
 196       tz_dsttime     : int;
 197    end record;
 198    pragma Convention (C, struct_timezone);
 199    type struct_timezone_ptr is access all struct_timezone;
 200
 201    type struct_timeval is private;
 202    --  This is needed on systems that do not have clock_gettime()
 203    --  but do have gettimeofday().
 204
 205    function To_Duration (TV : struct_timeval) return Duration;
 206    pragma Inline (To_Duration);
 207
 208    function To_Timeval (D : Duration) return struct_timeval;
 209    pragma Inline (To_Timeval);
 210
 211    -------------------------
 212    -- Priority Scheduling --
 213    -------------------------
 214
 215    SCHED_FIFO  : constant := 0;
 216    SCHED_RR    : constant := 1;
 217    SCHED_OTHER : constant := 2;
 218
 219    -------------
 220    -- Process --
 221    -------------
 222
 223    type pid_t is private;
 224
 225    function kill (pid : pid_t; sig : Signal) return int;
 226    pragma Import (C, kill, "kill");
 227
 228    function getpid return pid_t;
 229    pragma Import (C, getpid, "getpid");
 230
 231    ---------
 232    -- LWP --
 233    ---------
 234
 235    function lwp_self return System.Address;
 236    pragma Import (C, lwp_self, "_lwp_self");
 237
 238    -------------
 239    -- Threads --
 240    -------------
 241
 242    type Thread_Body is access
 243      function (arg : System.Address) return System.Address;
 244    type pthread_t           is private;
 245    subtype Thread_Id        is pthread_t;
 246
 247    type pthread_mutex_t     is limited private;
 248    type pthread_cond_t      is limited private;
 249    type pthread_attr_t      is limited private;
 250    type pthread_mutexattr_t is limited private;
 251    type pthread_condattr_t  is limited private;
 252    type pthread_key_t       is private;
 253
 254    PTHREAD_CREATE_DETACHED : constant := 16#de#;
 255
 256    -----------
 257    -- Stack --
 258    -----------
 259
 260    Stack_Base_Available : constant Boolean := False;
 261    --  Indicates wether the stack base is available on this target.
 262
 263    function Get_Stack_Base (thread : pthread_t) return Address;
 264    pragma Inline (Get_Stack_Base);
 265    --  returns the stack base of the specified thread.
 266    --  Only call this function when Stack_Base_Available is True.
 267
 268    function Get_Page_Size return size_t;
 269    function Get_Page_Size return Address;
 270    pragma Import (C, Get_Page_Size, "getpagesize");
 271    --  returns the size of a page, or 0 if this is not relevant on this
 272    --  target
 273
 274    PROT_NONE  : constant := 0;
 275    PROT_READ  : constant := 1;
 276    PROT_WRITE : constant := 2;
 277    PROT_EXEC  : constant := 4;
 278    PROT_ALL   : constant := PROT_READ + PROT_WRITE + PROT_EXEC;
 279
 280    PROT_ON    : constant := PROT_READ;
 281    PROT_OFF   : constant := PROT_ALL;
 282
 283    function mprotect (addr : Address; len : size_t; prot : int) return int;
 284    pragma Import (C, mprotect);
 285
 286    ---------------------------------------
 287    -- Nonstandard Thread Initialization --
 288    ---------------------------------------
 289
 290    procedure pthread_init;
 291    pragma Inline (pthread_init);
 292    --  This is a dummy procedure to share some GNULLI files
 293
 294    -------------------------
 295    -- POSIX.1c  Section 3 --
 296    -------------------------
 297
 298    function sigwait
 299      (set : access sigset_t;
 300       sig : access Signal) return int;
 301    pragma Import (C, sigwait, "sigwait");
 302
 303    function pthread_kill
 304      (thread : pthread_t;
 305       sig    : Signal) return int;
 306    pragma Import (C, pthread_kill, "pthread_kill");
 307
 308    type sigset_t_ptr is access all sigset_t;
 309
 310    function pthread_sigmask
 311      (how  : int;
 312       set  : sigset_t_ptr;
 313       oset : sigset_t_ptr) return int;
 314    pragma Import (C, pthread_sigmask, "pthread_sigmask");
 315
 316    --------------------------
 317    -- POSIX.1c  Section 11 --
 318    --------------------------
 319
 320    function pthread_mutexattr_init
 321      (attr : access pthread_mutexattr_t) return int;
 322    pragma Import (C, pthread_mutexattr_init, "pthread_mutexattr_init");
 323
 324    function pthread_mutexattr_destroy
 325      (attr : access pthread_mutexattr_t) return int;
 326    pragma Import (C, pthread_mutexattr_destroy, "pthread_mutexattr_destroy");
 327
 328    function pthread_mutex_init
 329      (mutex : access pthread_mutex_t;
 330       attr  : access pthread_mutexattr_t) return int;
 331    pragma Import (C, pthread_mutex_init, "pthread_mutex_init");
 332
 333    function pthread_mutex_destroy (mutex : access pthread_mutex_t) return int;
 334    pragma Import (C, pthread_mutex_destroy, "pthread_mutex_destroy");
 335
 336    function pthread_mutex_lock (mutex : access pthread_mutex_t) return int;
 337    pragma Import (C, pthread_mutex_lock, "pthread_mutex_lock");
 338
 339    function pthread_mutex_unlock (mutex : access pthread_mutex_t) return int;
 340    pragma Import (C, pthread_mutex_unlock, "pthread_mutex_unlock");
 341
 342    function pthread_condattr_init
 343      (attr : access pthread_condattr_t) return int;
 344    pragma Import (C, pthread_condattr_init, "pthread_condattr_init");
 345
 346    function pthread_condattr_destroy
 347      (attr : access pthread_condattr_t) return int;
 348    pragma Import (C, pthread_condattr_destroy, "pthread_condattr_destroy");
 349
 350    function pthread_cond_init
 351      (cond : access pthread_cond_t;
 352       attr : access pthread_condattr_t) return int;
 353    pragma Import (C, pthread_cond_init, "pthread_cond_init");
 354
 355    function pthread_cond_destroy (cond : access pthread_cond_t) return int;
 356    pragma Import (C, pthread_cond_destroy, "pthread_cond_destroy");
 357
 358    function pthread_cond_signal (cond : access pthread_cond_t) return int;
 359    pragma Import (C, pthread_cond_signal, "pthread_cond_signal");
 360
 361    function pthread_cond_wait
 362      (cond  : access pthread_cond_t;
 363       mutex : access pthread_mutex_t) return int;
 364    pragma Import (C, pthread_cond_wait, "pthread_cond_wait");
 365
 366    function pthread_cond_timedwait
 367      (cond    : access pthread_cond_t;
 368       mutex   : access pthread_mutex_t;
 369       abstime : access timespec) return int;
 370    pragma Import (C, pthread_cond_timedwait, "pthread_cond_timedwait");
 371
 372    Relative_Timed_Wait : constant Boolean := False;
 373    --  pthread_cond_timedwait requires an absolute delay time
 374
 375    ----------------------------
 376    --  POSIX.1c  Section 13  --
 377    ----------------------------
 378
 379    PTHREAD_PRIO_NONE    : constant := 16#100#;
 380    PTHREAD_PRIO_PROTECT : constant := 16#200#;
 381    PTHREAD_PRIO_INHERIT : constant := 16#400#;
 382
 383    function pthread_mutexattr_setprotocol
 384      (attr     : access pthread_mutexattr_t;
 385       protocol : int) return int;
 386    pragma Import (C, pthread_mutexattr_setprotocol);
 387
 388    function pthread_mutexattr_setprioceiling
 389      (attr     : access pthread_mutexattr_t;
 390       prioceiling : int) return int;
 391    pragma Import (C, pthread_mutexattr_setprioceiling);
 392
 393    type Array_7_Int is array (0 .. 6) of int;
 394    type struct_sched_param is record
 395       sched_priority : int;
 396       sched_reserved : Array_7_Int;
 397    end record;
 398
 399    function pthread_setschedparam
 400      (thread : pthread_t;
 401       policy : int;
 402       param  : access struct_sched_param)
 403      return int;
 404    pragma Import (C, pthread_setschedparam, "pthread_setschedparam");
 405
 406    function pthread_attr_setscope
 407      (attr            : access pthread_attr_t;
 408       contentionscope : int) return int;
 409    pragma Import (C, pthread_attr_setscope, "pthread_attr_setscope");
 410
 411    function pthread_attr_setinheritsched
 412      (attr         : access pthread_attr_t;
 413       inheritsched : int) return int;
 414    pragma Import (C, pthread_attr_setinheritsched);
 415
 416    function pthread_attr_setschedpolicy
 417      (attr   : access pthread_attr_t;
 418       policy : int) return int;
 419    pragma Import (C, pthread_attr_setschedpolicy);
 420
 421    function sched_yield return int;
 422    pragma Import (C, sched_yield, "sched_yield");
 423
 424    ---------------------------
 425    -- P1003.1c - Section 16 --
 426    ---------------------------
 427
 428    function pthread_attr_init
 429      (attributes : access pthread_attr_t) return int;
 430    pragma Import (C, pthread_attr_init, "__pthread_attr_init_system");
 431
 432    function pthread_attr_destroy
 433      (attributes : access pthread_attr_t) return int;
 434    pragma Import (C, pthread_attr_destroy, "pthread_attr_destroy");
 435
 436    function pthread_attr_setdetachstate
 437      (attr        : access pthread_attr_t;
 438       detachstate : int) return int;
 439    pragma Import (C, pthread_attr_setdetachstate);
 440
 441    function pthread_attr_setstacksize
 442      (attr      : access pthread_attr_t;
 443       stacksize : size_t) return int;
 444    pragma Import (C, pthread_attr_setstacksize, "pthread_attr_setstacksize");
 445
 446    function pthread_create
 447      (thread        : access pthread_t;
 448       attributes    : access pthread_attr_t;
 449       start_routine : Thread_Body;
 450       arg           : System.Address) return int;
 451    pragma Import (C, pthread_create, "__pthread_create_system");
 452
 453    procedure pthread_exit (status : System.Address);
 454    pragma Import (C, pthread_exit, "pthread_exit");
 455
 456    function pthread_self return pthread_t;
 457    pragma Import (C, pthread_self, "pthread_self");
 458
 459    --------------------------
 460    -- POSIX.1c  Section 17 --
 461    --------------------------
 462
 463    function pthread_setspecific
 464      (key   : pthread_key_t;
 465       value : System.Address) return int;
 466    pragma Import (C, pthread_setspecific, "pthread_setspecific");
 467
 468    function pthread_getspecific (key : pthread_key_t) return System.Address;
 469    pragma Import (C, pthread_getspecific, "pthread_getspecific");
 470
 471    type destructor_pointer is access procedure (arg : System.Address);
 472
 473    function pthread_key_create
 474      (key        : access pthread_key_t;
 475       destructor : destructor_pointer) return int;
 476    pragma Import (C, pthread_key_create, "pthread_key_create");
 477
 478 private
 479
 480    type unsigned_int_array_8 is array (0 .. 7) of unsigned;
 481    type sigset_t is record
 482       sigset : unsigned_int_array_8;
 483    end record;
 484    pragma Convention (C_Pass_By_Copy, sigset_t);
 485
 486    type pid_t is new int;
 487
 488    type time_t is new long;
 489
 490    type timespec is record
 491       tv_sec  : time_t;
 492       tv_nsec : long;
 493    end record;
 494    pragma Convention (C, timespec);
 495
 496    type clockid_t is new int;
 497    CLOCK_REALTIME : constant clockid_t := 1;
 498
 499    type struct_timeval is record
 500       tv_sec  : time_t;
 501       tv_usec : time_t;
 502    end record;
 503    pragma Convention (C, struct_timeval);
 504
 505    type pthread_attr_t is new int;
 506    type pthread_condattr_t is new int;
 507    type pthread_mutexattr_t is new int;
 508    type pthread_t is new int;
 509
 510    type short_array is array (Natural range <>) of short;
 511    type int_array is array (Natural range <>) of int;
 512
 513    type pthread_mutex_t is record
 514       m_short  : short_array (0 .. 1);
 515       m_int    : int;
 516       m_int1   : int_array (0 .. 3);
 517       m_pad    : int;  --  needed for 32 bit ABI, but *not* for 64 bit
 518       m_ptr    : System.Address;
 519       m_int2   : int_array (0 .. 1);
 520       m_int3   : int_array (0 .. 3);
 521       m_short2 : short_array (0 .. 1);
 522       m_int4   : int_array (0 .. 4);
 523       m_int5   : int_array (0 .. 1);
 524    end record;
 525    pragma Convention (C, pthread_mutex_t);
 526
 527    type pthread_cond_t is record
 528       c_short : short_array (0 .. 1);
 529       c_int   : int;
 530       c_int1  : int_array (0 .. 3);
 531       m_pad   : int;  --  needed for 32 bit ABI, but *not* for 64 bit
 532       m_ptr   : System.Address;
 533       c_int2  : int_array (0 .. 1);
 534       c_int3  : int_array (0 .. 1);
 535       c_int4  : int_array (0 .. 1);
 536    end record;
 537    pragma Convention (C, pthread_cond_t);
 538
 539    type pthread_key_t is new int;
 540
 541 end System.OS_Interface;