gcc/ada/5cosinte.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) 1998-2001 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 (FSU 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    --  pragma Elaborate_Body;
  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 := 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 := SIGABRT;
 132
 133    type Signal_Set is array (Natural range <>) of Signal;
 134
 135    Unmasked    : constant Signal_Set :=
 136      (SIGTRAP, SIGTTIN, SIGTTOU, SIGTSTP, SIGPROF);
 137    Reserved    : constant Signal_Set :=
 138      (SIGKILL, SIGSTOP, SIGALRM, SIGWAITING);
 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    SA_SIGINFO  : constant := 16#0100#;
 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, "_internal_sigaction");
 179
 180    ----------
 181    -- Time --
 182    ----------
 183
 184    Time_Slice_Supported : constant Boolean := True;
 185    --  Indicates wether time slicing is supported (i.e FSU threads have been
 186    --  compiled with DEF_RR)
 187
 188    type timespec is private;
 189
 190    type clockid_t is private;
 191
 192    CLOCK_REALTIME : constant clockid_t;
 193
 194    function clock_gettime
 195      (clock_id : clockid_t;
 196       tp       : access timespec) return int;
 197    pragma Import (C, clock_gettime, "clock_gettime");
 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_timeval is private;
 206
 207    function To_Duration (TV : struct_timeval) return Duration;
 208    pragma Inline (To_Duration);
 209
 210    function To_Timeval (D : Duration) return struct_timeval;
 211    pragma Inline (To_Timeval);
 212
 213    -------------------------
 214    -- Priority Scheduling --
 215    -------------------------
 216
 217    SCHED_FIFO  : constant := 0;
 218    SCHED_RR    : constant := 1;
 219    SCHED_OTHER : constant := 2;
 220
 221    -------------
 222    -- Process --
 223    -------------
 224
 225    type pid_t is private;
 226
 227    function kill (pid : pid_t; sig : Signal) return int;
 228    pragma Import (C, kill, "kill");
 229
 230    function getpid return pid_t;
 231    pragma Import (C, getpid, "getpid");
 232
 233    ---------
 234    -- LWP --
 235    ---------
 236
 237    function lwp_self return System.Address;
 238    --  lwp_self does not exist on this thread library, revert to pthread_self
 239    --  which is the closest approximation (with getpid). This function is
 240    --  needed to share 7staprop.adb across POSIX-like targets.
 241    pragma Import (C, lwp_self, "pthread_self");
 242
 243    -------------
 244    -- Threads --
 245    -------------
 246
 247    type Thread_Body is access
 248      function (arg : System.Address) return System.Address;
 249    type pthread_t           is private;
 250    subtype Thread_Id        is pthread_t;
 251
 252    type pthread_mutex_t     is limited private;
 253    type pthread_cond_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 := 1;
 260
 261    -----------
 262    -- Stack --
 263    -----------
 264
 265    Stack_Base_Available : constant Boolean := True;
 266    --  Indicates wether the stack base is available on this target.
 267    --  This allows us to share s-osinte.adb between all the FSU run time.
 268    --  Note that this value can only be true if pthread_t has a complete
 269    --  definition that corresponds exactly to the C header files.
 270
 271    function Get_Stack_Base (thread : pthread_t) return Address;
 272    pragma Inline (Get_Stack_Base);
 273    --  returns the stack base of the specified thread.
 274    --  Only call this function when Stack_Base_Available is True.
 275
 276    function Get_Page_Size return size_t;
 277    function Get_Page_Size return Address;
 278    pragma Import (C, Get_Page_Size, "getpagesize");
 279    --  returns the size of a page, or 0 if this is not relevant on this
 280    --  target
 281
 282    PROT_NONE  : constant := 0;
 283    PROT_READ  : constant := 1;
 284    PROT_WRITE : constant := 2;
 285    PROT_EXEC  : constant := 4;
 286    PROT_ALL   : constant := PROT_READ + PROT_WRITE + PROT_EXEC;
 287
 288    PROT_ON    : constant := PROT_READ;
 289    PROT_OFF   : constant := PROT_ALL;
 290
 291    function mprotect (addr : Address; len : size_t; prot : int) return int;
 292    pragma Import (C, mprotect);
 293
 294    ---------------------------------------
 295    -- Nonstandard Thread Initialization --
 296    ---------------------------------------
 297
 298    procedure pthread_init;
 299    --  FSU_THREADS requires pthread_init, which is nonstandard
 300    --  and this should be invoked during the elaboration of s-taprop.adb
 301    pragma Import (C, pthread_init, "pthread_init");
 302
 303    -------------------------
 304    -- POSIX.1c  Section 3 --
 305    -------------------------
 306
 307    function sigwait
 308      (set : access sigset_t;
 309       sig : access Signal) return int;
 310    --  FSU_THREADS has a nonstandard sigwait
 311
 312    function pthread_kill
 313      (thread : pthread_t;
 314       sig    : Signal) return int;
 315    pragma Import (C, pthread_kill, "pthread_kill");
 316
 317    --  FSU threads does not have pthread_sigmask. Instead, it redefines
 318    --  sigprocmask and then uses a special syscall API to call the system
 319    --  version. Doing syscalls on AiX is very difficult, so we rename the
 320    --  pthread version instead.
 321
 322    type sigset_t_ptr is access all sigset_t;
 323
 324    function pthread_sigmask
 325      (how  : int;
 326       set  : sigset_t_ptr;
 327       oset : sigset_t_ptr) return int;
 328    pragma Import (C, pthread_sigmask, "_internal_sigprocmask");
 329
 330    --------------------------
 331    -- POSIX.1c  Section 11 --
 332    --------------------------
 333
 334    function pthread_mutexattr_init
 335      (attr : access pthread_mutexattr_t) return int;
 336    pragma Import (C, pthread_mutexattr_init, "pthread_mutexattr_init");
 337
 338    function pthread_mutexattr_destroy
 339      (attr : access pthread_mutexattr_t) return int;
 340    pragma Import (C, pthread_mutexattr_destroy, "pthread_mutexattr_destroy");
 341
 342    function pthread_mutex_init
 343      (mutex : access pthread_mutex_t;
 344       attr  : access pthread_mutexattr_t) return int;
 345    pragma Import (C, pthread_mutex_init, "pthread_mutex_init");
 346
 347    function pthread_mutex_destroy (mutex : access pthread_mutex_t) return int;
 348    pragma Import (C, pthread_mutex_destroy, "pthread_mutex_destroy");
 349
 350    function pthread_mutex_lock (mutex : access pthread_mutex_t) return int;
 351    --  FSU_THREADS has nonstandard pthread_mutex_lock
 352
 353    function pthread_mutex_unlock (mutex : access pthread_mutex_t) return int;
 354    --  FSU_THREADS has nonstandard pthread_mutex_lock
 355
 356    function pthread_condattr_init
 357      (attr : access pthread_condattr_t) return int;
 358    pragma Import (C, pthread_condattr_init, "pthread_condattr_init");
 359
 360    function pthread_condattr_destroy
 361      (attr : access pthread_condattr_t) return int;
 362    pragma Import (C, pthread_condattr_destroy, "pthread_condattr_destroy");
 363
 364    function pthread_cond_init
 365      (cond : access pthread_cond_t;
 366       attr : access pthread_condattr_t) return int;
 367    pragma Import (C, pthread_cond_init, "pthread_cond_init");
 368
 369    function pthread_cond_destroy (cond : access pthread_cond_t) return int;
 370    pragma Import (C, pthread_cond_destroy, "pthread_cond_destroy");
 371
 372    function pthread_cond_signal (cond : access pthread_cond_t) return int;
 373    pragma Import (C, pthread_cond_signal, "pthread_cond_signal");
 374
 375    function pthread_cond_wait
 376      (cond  : access pthread_cond_t;
 377       mutex : access pthread_mutex_t) return int;
 378    --  FSU_THREADS has a nonstandard pthread_cond_wait
 379
 380    function pthread_cond_timedwait
 381      (cond    : access pthread_cond_t;
 382       mutex   : access pthread_mutex_t;
 383       abstime : access timespec) return int;
 384    --  FSU_THREADS has a nonstandard pthread_cond_timedwait
 385
 386    Relative_Timed_Wait : constant Boolean := False;
 387    --  pthread_cond_timedwait requires an absolute delay time
 388
 389    --------------------------
 390    -- POSIX.1c  Section 13 --
 391    --------------------------
 392
 393    PTHREAD_PRIO_NONE    : constant := 0;
 394    PTHREAD_PRIO_PROTECT : constant := 2;
 395    PTHREAD_PRIO_INHERIT : constant := 1;
 396
 397    function pthread_mutexattr_setprotocol
 398      (attr     : access pthread_mutexattr_t;
 399       protocol : int) return int;
 400    pragma Import (C, pthread_mutexattr_setprotocol);
 401
 402    function pthread_mutexattr_setprioceiling
 403      (attr        : access pthread_mutexattr_t;
 404       prioceiling : int) return int;
 405    pragma Import
 406      (C, pthread_mutexattr_setprioceiling,
 407          "pthread_mutexattr_setprio_ceiling");
 408
 409    type struct_sched_param is record
 410       sched_priority : int;  --  scheduling priority
 411    end record;
 412
 413    function pthread_setschedparam
 414      (thread : pthread_t;
 415       policy : int;
 416       param  : access struct_sched_param) return int;
 417    --  FSU_THREADS does not have 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, "pthread_attr_setsched");
 433
 434    function sched_yield return int;
 435    --  FSU_THREADS does not have sched_yield;
 436
 437    ---------------------------
 438    -- P1003.1c - Section 16 --
 439    ---------------------------
 440
 441    function pthread_attr_init (attributes : access pthread_attr_t) return int;
 442    pragma Import (C, pthread_attr_init, "pthread_attr_init");
 443
 444    function pthread_attr_destroy
 445      (attributes : access pthread_attr_t) return int;
 446    pragma Import (C, pthread_attr_destroy, "pthread_attr_destroy");
 447
 448    function pthread_attr_setdetachstate
 449      (attr        : access pthread_attr_t;
 450       detachstate : int) return int;
 451    --  FSU_THREADS has a nonstandard pthread_attr_setdetachstate
 452
 453    function pthread_attr_setstacksize
 454      (attr      : access pthread_attr_t;
 455       stacksize : size_t) return int;
 456    pragma Import (C, pthread_attr_setstacksize);
 457
 458    function pthread_create
 459      (thread        : access pthread_t;
 460       attributes    : access pthread_attr_t;
 461       start_routine : Thread_Body;
 462       arg           : System.Address) return int;
 463    pragma Import (C, pthread_create, "pthread_create");
 464
 465    procedure pthread_exit (status : System.Address);
 466    pragma Import (C, pthread_exit, "pthread_exit");
 467
 468    function pthread_self return pthread_t;
 469    pragma Import (C, pthread_self, "pthread_self");
 470
 471    --------------------------
 472    -- POSIX.1c  Section 17 --
 473    --------------------------
 474
 475    function pthread_setspecific
 476      (key   : pthread_key_t;
 477       value : System.Address) return int;
 478    pragma Import (C, pthread_setspecific, "pthread_setspecific");
 479
 480    function pthread_getspecific (key : pthread_key_t) return System.Address;
 481    --  FSU_THREADS has a nonstandard pthread_getspecific
 482
 483    type destructor_pointer is access procedure (arg : System.Address);
 484
 485    function pthread_key_create
 486      (key        : access pthread_key_t;
 487       destructor : destructor_pointer) return int;
 488    pragma Import (C, pthread_key_create, "pthread_key_create");
 489
 490 private
 491
 492    type sigset_t is record
 493       losigs : unsigned_long;
 494       hisigs : unsigned_long;
 495    end record;
 496    pragma Convention (C_Pass_By_Copy, sigset_t);
 497
 498    type pid_t is new int;
 499
 500    type time_t is new long;
 501
 502    type timespec is record
 503       tv_sec  : time_t;
 504       tv_nsec : long;
 505    end record;
 506    pragma Convention (C, timespec);
 507
 508    type clockid_t is new int;
 509    CLOCK_REALTIME : constant clockid_t := 0;
 510
 511    type struct_timeval is record
 512       tv_sec  : long;
 513       tv_usec : long;
 514    end record;
 515    pragma Convention (C, struct_timeval);
 516
 517    type pthread_attr_t is record
 518       flags           : int;
 519       stacksize       : int;
 520       contentionscope : int;
 521       inheritsched    : int;
 522       detachstate     : int;
 523       sched           : int;
 524       prio            : int;
 525       starttime       : timespec;
 526       deadline        : timespec;
 527       period          : timespec;
 528    end record;
 529    pragma Convention (C_Pass_By_Copy, pthread_attr_t);
 530
 531    type pthread_condattr_t is record
 532       flags : int;
 533    end record;
 534    pragma Convention (C, pthread_condattr_t);
 535
 536    type pthread_mutexattr_t is record
 537       flags        : int;
 538       prio_ceiling : int;
 539       protocol     : int;
 540    end record;
 541    pragma Convention (C, pthread_mutexattr_t);
 542
 543    type sigjmp_buf is array (Integer range 0 .. 63) of int;
 544
 545    type pthread_t_struct is record
 546       context    : sigjmp_buf;
 547       pbody      : sigjmp_buf;
 548       errno      : int;
 549       ret        : int;
 550       stack_base : System.Address;
 551    end record;
 552    pragma Convention (C, pthread_t_struct);
 553
 554    type pthread_t is access all pthread_t_struct;
 555
 556    type queue_t is record
 557       head : System.Address;
 558       tail : System.Address;
 559    end record;
 560    pragma Convention (C, queue_t);
 561
 562    type pthread_mutex_t is record
 563       queue        : queue_t;
 564       lock         : plain_char;
 565       owner        : System.Address;
 566       flags        : int;
 567       prio_ceiling : int;
 568       protocol     : int;
 569       prev_max_ceiling_prio  : int;
 570    end record;
 571    pragma Convention (C, pthread_mutex_t);
 572
 573    type pthread_cond_t is record
 574       queue   : queue_t;
 575       flags   : int;
 576       waiters : int;
 577       mutex   : System.Address;
 578    end record;
 579    pragma Convention (C, pthread_cond_t);
 580
 581    type pthread_key_t is new int;
 582
 583 end System.OS_Interface;