gcc/ada/5posinte.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. It is --
  31 -- now maintained by Ada Core Technologies Inc. in cooperation with Florida --
  32 -- State University (http://www.gnat.com).                                  --
  33 --                                                                          --
  34 ------------------------------------------------------------------------------
  35
  36 --  This is a OpenNT/Interix (FSU THREADS) version of this package.
  37
  38 --  This package encapsulates all direct interfaces to OS services
  39 --  that are needed by children of System.
  40
  41 --  PLEASE DO NOT add any with-clauses to this package
  42 --  or remove the pragma Elaborate_Body.
  43 --  It is designed to be a bottom-level (leaf) package.
  44
  45 with Interfaces.C;
  46 package System.OS_Interface is
  47    pragma Preelaborate;
  48
  49    pragma Linker_Options ("-lgthreads");
  50    pragma Linker_Options ("-lmalloc");
  51
  52    subtype int            is Interfaces.C.int;
  53    subtype short          is Interfaces.C.short;
  54    subtype long           is Interfaces.C.long;
  55    subtype unsigned       is Interfaces.C.unsigned;
  56    subtype unsigned_short is Interfaces.C.unsigned_short;
  57    subtype unsigned_long  is Interfaces.C.unsigned_long;
  58    subtype unsigned_char  is Interfaces.C.unsigned_char;
  59    subtype plain_char     is Interfaces.C.plain_char;
  60    subtype size_t         is Interfaces.C.size_t;
  61
  62    -----------
  63    -- Errno --
  64    -----------
  65
  66    function errno return int;
  67    pragma Import (C, errno, "__get_errno");
  68
  69    EAGAIN    : constant := 11;
  70    EINTR     : constant := 4;
  71    EINVAL    : constant := 22;
  72    ENOMEM    : constant := 12;
  73    ETIMEDOUT : constant := 60;
  74
  75    -------------
  76    -- Signals --
  77    -------------
  78
  79    Max_Interrupt : constant := 31;
  80    type Signal is new int range 0 .. Max_Interrupt;
  81    for Signal'Size use int'Size;
  82
  83    SIGHUP      : constant := 1; --  hangup
  84    SIGINT      : constant := 2; --  interrupt (rubout)
  85    SIGQUIT     : constant := 3; --  quit (ASCD FS)
  86    SIGILL      : constant := 4; --  illegal instruction (not reset)
  87    SIGTRAP     : constant := 5; --  trace trap (not reset)
  88    SIGIOT      : constant := 6; --  IOT instruction
  89    SIGABRT     : constant := 6; --  used by abort, replace SIGIOT in the future
  90    SIGEMT      : constant := 0; --  EMT instruction
  91    SIGFPE      : constant := 8; --  floating point exception
  92    SIGKILL     : constant := 9; --  kill (cannot be caught or ignored)
  93    SIGBUS      : constant := 10; --  bus error
  94    SIGSEGV     : constant := 11; --  segmentation violation
  95    SIGSYS      : constant := 12;  --  bad argument to system call
  96    SIGPIPE     : constant := 13; --  write on a pipe with no one to read it
  97    SIGALRM     : constant := 14; --  alarm clock
  98    SIGTERM     : constant := 15; --  software termination signal from kill
  99    SIGUSR1     : constant := 16; --  user defined signal 1
 100    SIGUSR2     : constant := 17; --  user defined signal 2
 101    SIGCLD      : constant := 18; --  alias for SIGCHLD
 102    SIGCHLD     : constant := 18; --  child status change
 103    SIGPWR      : constant := 0; --  power-fail restart
 104    SIGWINCH    : constant := 20; --  window size change
 105    SIGURG      : constant := 21; --  urgent condition on IO channel
 106    SIGPOLL     : constant := 22; --  pollable event occurred
 107    SIGIO       : constant := 19; --  I/O possible (Solaris SIGPOLL alias)
 108    SIGSTOP     : constant := 23; --  stop (cannot be caught or ignored)
 109    SIGTSTP     : constant := 24; --  user stop requested from tty
 110    SIGCONT     : constant := 25; --  stopped process has been continued
 111    SIGTTIN     : constant := 26; --  background tty read attempted
 112    SIGTTOU     : constant := 27; --  background tty write attempted
 113    SIGVTALRM   : constant := 28; --  virtual timer expired
 114    SIGPROF     : constant := 29; --  profiling timer expired
 115    SIGXCPU     : constant := 30; --  CPU time limit exceeded
 116    SIGXFSZ     : constant := 31; --  filesize limit exceeded
 117
 118    SIGADAABORT : constant := SIGABRT;
 119
 120    type Signal_Set is array (Natural range <>) of Signal;
 121
 122    Unmasked    : constant Signal_Set :=
 123      (SIGTRAP, SIGALRM, SIGVTALRM, SIGTTIN, SIGTTOU, SIGTSTP, SIGPROF);
 124
 125    Reserved    : constant Signal_Set := (SIGKILL, SIGSTOP);
 126
 127    type sigset_t is private;
 128
 129    function sigaddset (set : access sigset_t; sig : Signal) return int;
 130    pragma Import (C, sigaddset, "sigaddset");
 131
 132    function sigdelset (set : access sigset_t; sig : Signal) return int;
 133    pragma Import (C, sigdelset, "sigdelset");
 134
 135    function sigfillset (set : access sigset_t) return int;
 136    pragma Import (C, sigfillset, "sigfillset");
 137
 138    function sigismember (set : access sigset_t; sig : Signal) return int;
 139    pragma Import (C, sigismember, "sigismember");
 140
 141    function sigemptyset (set : access sigset_t) return int;
 142    pragma Import (C, sigemptyset, "sigemptyset");
 143
 144    type struct_sigaction is record
 145       sa_handler  : System.Address;
 146       sa_mask     : sigset_t;
 147       sa_flags    : int;
 148       sa_restorer : System.Address;
 149    end record;
 150    pragma Convention (C, struct_sigaction);
 151    type struct_sigaction_ptr is access all struct_sigaction;
 152
 153    SIG_BLOCK   : constant := 1;
 154    SIG_UNBLOCK : constant := 2;
 155    SIG_SETMASK : constant := 3;
 156
 157    SIG_DFL : constant := 0;
 158    SIG_IGN : constant := 1;
 159
 160    function sigaction
 161      (sig  : Signal;
 162       act  : struct_sigaction_ptr;
 163       oact : struct_sigaction_ptr) return int;
 164    --  FSU pthreads redefines sigaction and then uses a special syscall
 165    --  API to call the system version. Doing syscalls on OpenNT is very
 166    --  difficult, so we rename the pthread version instead.
 167    pragma Import (C, sigaction, "pthread_wrapper_sigaction");
 168
 169    ----------
 170    -- Time --
 171    ----------
 172
 173    Time_Slice_Supported : constant Boolean := False;
 174    --  Indicates wether time slicing is supported (i.e FSU threads have been
 175    --  compiled with DEF_RR)
 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_timeval is private;
 195
 196    function To_Duration (TV : struct_timeval) return Duration;
 197    pragma Inline (To_Duration);
 198
 199    function To_Timeval (D : Duration) return struct_timeval;
 200    pragma Inline (To_Timeval);
 201
 202    -------------------------
 203    -- Priority Scheduling --
 204    -------------------------
 205
 206    SCHED_FIFO  : constant := 0;
 207    SCHED_RR    : constant := 1;
 208    SCHED_OTHER : constant := 2;
 209
 210    -------------
 211    -- Process --
 212    -------------
 213
 214    type pid_t is private;
 215
 216    function kill (pid : pid_t; sig : Signal) return int;
 217    pragma Import (C, kill, "kill");
 218
 219    function getpid return pid_t;
 220    pragma Import (C, getpid, "getpid");
 221
 222    ---------
 223    -- LWP --
 224    ---------
 225
 226    function lwp_self return System.Address;
 227    --  lwp_self does not exist on this thread library, revert to pthread_self
 228    --  which is the closest approximation (with getpid). This function is
 229    --  needed to share 7staprop.adb across POSIX-like targets.
 230    pragma Import (C, lwp_self, "pthread_self");
 231
 232    -------------
 233    -- Threads --
 234    -------------
 235
 236    type Thread_Body is access
 237      function (arg : System.Address) return System.Address;
 238    type pthread_t           is private;
 239    subtype Thread_Id        is pthread_t;
 240
 241    type pthread_mutex_t     is limited private;
 242    type pthread_cond_t      is limited private;
 243    type pthread_attr_t      is limited private;
 244    type pthread_mutexattr_t is limited private;
 245    type pthread_condattr_t  is limited private;
 246    type pthread_key_t       is private;
 247
 248    PTHREAD_CREATE_DETACHED : constant := 1;
 249    PTHREAD_CREATE_JOINABLE : constant := 0;
 250
 251    -----------
 252    -- Stack --
 253    -----------
 254
 255    Stack_Base_Available : constant Boolean := False;
 256    --  Indicates wether the stack base is available on this target.
 257    --  This allows us to share s-osinte.adb between all the FSU run time.
 258    --  Note that this value can only be true if pthread_t has a complete
 259    --  definition that corresponds exactly to the C header files.
 260
 261    function Get_Stack_Base (thread : pthread_t) return Address;
 262    pragma Inline (Get_Stack_Base);
 263    --  returns the stack base of the specified thread.
 264    --  Only call this function when Stack_Base_Available is True.
 265
 266    function Get_Page_Size return size_t;
 267    function Get_Page_Size return Address;
 268    pragma Import (C, Get_Page_Size, "getpagesize");
 269    --  returns the size of a page, or 0 if this is not relevant on this
 270    --  target
 271
 272    PROT_NONE  : constant := 0;
 273    PROT_READ  : constant := 1;
 274    PROT_WRITE : constant := 2;
 275    PROT_EXEC  : constant := 4;
 276    PROT_ALL   : constant := PROT_READ + PROT_WRITE + PROT_EXEC;
 277
 278    PROT_ON    : constant := PROT_NONE;
 279    PROT_OFF   : constant := PROT_ALL;
 280
 281    function mprotect (addr : Address; len : size_t; prot : int) return int;
 282    pragma Import (C, mprotect);
 283
 284    ---------------------------------------
 285    -- Nonstandard Thread Initialization --
 286    ---------------------------------------
 287
 288    procedure pthread_init;
 289    --  FSU_THREADS requires pthread_init, which is nonstandard
 290    --  and this should be invoked during the elaboration of s-taprop.adb
 291    pragma Import (C, pthread_init, "pthread_init");
 292
 293    -------------------------
 294    -- POSIX.1c  Section 3 --
 295    -------------------------
 296
 297    function sigwait
 298      (set : access sigset_t;
 299       sig : access Signal) return int;
 300    --  FSU_THREADS has a nonstandard sigwait
 301
 302    function pthread_kill
 303      (thread : pthread_t;
 304       sig    : Signal) return   int;
 305    pragma Import (C, pthread_kill, "pthread_kill");
 306
 307    type sigset_t_ptr is access all sigset_t;
 308
 309    function pthread_sigmask
 310      (how  : int;
 311       set  : sigset_t_ptr;
 312       oset : sigset_t_ptr) return int;
 313    pragma Import (C, pthread_sigmask, "pthread_wrapper_sigprocmask");
 314
 315    --------------------------
 316    -- POSIX.1c  Section 11 --
 317    --------------------------
 318
 319    function pthread_mutexattr_init
 320      (attr : access pthread_mutexattr_t) return int;
 321    pragma Import (C, pthread_mutexattr_init, "pthread_mutexattr_init");
 322
 323    function pthread_mutexattr_destroy
 324      (attr : access pthread_mutexattr_t) return int;
 325    pragma Import (C, pthread_mutexattr_destroy, "pthread_mutexattr_destroy");
 326
 327    function pthread_mutex_init
 328      (mutex : access pthread_mutex_t;
 329       attr  : access pthread_mutexattr_t) return int;
 330    pragma Import (C, pthread_mutex_init, "pthread_mutex_init");
 331
 332    function pthread_mutex_destroy (mutex : access pthread_mutex_t) return int;
 333    pragma Import (C, pthread_mutex_destroy, "pthread_mutex_destroy");
 334
 335    function pthread_mutex_lock (mutex : access pthread_mutex_t) return int;
 336    --  FSU_THREADS has nonstandard pthread_mutex_lock
 337
 338    function pthread_mutex_unlock (mutex : access pthread_mutex_t) return int;
 339    --  FSU_THREADS has nonstandard pthread_mutex_lock
 340
 341    function pthread_condattr_init
 342      (attr : access pthread_condattr_t) return int;
 343    pragma Import (C, pthread_condattr_init, "pthread_condattr_init");
 344
 345    function pthread_condattr_destroy
 346      (attr : access pthread_condattr_t) return int;
 347    pragma Import (C, pthread_condattr_destroy, "pthread_condattr_destroy");
 348
 349    function pthread_cond_init
 350      (cond : access pthread_cond_t;
 351       attr : access pthread_condattr_t) return int;
 352    pragma Import (C, pthread_cond_init, "pthread_cond_init");
 353
 354    function pthread_cond_destroy (cond : access pthread_cond_t) return int;
 355    pragma Import (C, pthread_cond_destroy, "pthread_cond_destroy");
 356
 357    function pthread_cond_signal (cond : access pthread_cond_t) return int;
 358    pragma Import (C, pthread_cond_signal, "pthread_cond_signal");
 359
 360    function pthread_cond_wait
 361      (cond  : access pthread_cond_t;
 362       mutex : access pthread_mutex_t) return int;
 363    --  FSU_THREADS has a nonstandard pthread_cond_wait
 364
 365    function pthread_cond_timedwait
 366      (cond    : access pthread_cond_t;
 367       mutex   : access pthread_mutex_t;
 368       abstime : access timespec) return int;
 369    --  FSU_THREADS has a nonstandard pthread_cond_timedwait
 370
 371    Relative_Timed_Wait : constant Boolean := False;
 372    --  pthread_cond_timedwait requires an absolute delay time
 373
 374    --------------------------
 375    -- POSIX.1c  Section 13 --
 376    --------------------------
 377
 378    PTHREAD_PRIO_NONE    : constant := 0;
 379    PTHREAD_PRIO_PROTECT : constant := 2;
 380    PTHREAD_PRIO_INHERIT : constant := 1;
 381
 382    function pthread_mutexattr_setprotocol
 383      (attr     : access pthread_mutexattr_t;
 384       protocol : int) return int;
 385    pragma Import (C, pthread_mutexattr_setprotocol);
 386
 387    function pthread_mutexattr_setprioceiling
 388      (attr     : access pthread_mutexattr_t;
 389       prioceiling : int) return int;
 390    pragma Import
 391      (C, pthread_mutexattr_setprioceiling,
 392       "pthread_mutexattr_setprio_ceiling");
 393
 394    type struct_sched_param is record
 395       sched_priority : int;  --  scheduling priority
 396    end record;
 397
 398    function pthread_setschedparam
 399      (thread : pthread_t;
 400       policy : int;
 401       param  : access struct_sched_param) return int;
 402    --  FSU_THREADS does not have pthread_setschedparam
 403
 404    function pthread_attr_setscope
 405      (attr            : access pthread_attr_t;
 406       contentionscope : int) return int;
 407    pragma Import (C, pthread_attr_setscope, "pthread_attr_setscope");
 408
 409    function pthread_attr_setinheritsched
 410      (attr         : access pthread_attr_t;
 411       inheritsched : int) return int;
 412    pragma Import (C, pthread_attr_setinheritsched);
 413
 414    function pthread_attr_setschedpolicy
 415      (attr   : access pthread_attr_t;
 416       policy : int) return int;
 417    pragma Import
 418     (C, pthread_attr_setschedpolicy, "pthread_attr_setsched");
 419
 420    function sched_yield return int;
 421    --  FSU_THREADS does not have sched_yield;
 422
 423    ---------------------------
 424    -- P1003.1c - Section 16 --
 425    ---------------------------
 426
 427    function pthread_attr_init (attributes : access pthread_attr_t) return int;
 428    pragma Import (C, pthread_attr_init, "pthread_attr_init");
 429
 430    function pthread_attr_destroy
 431      (attributes : access pthread_attr_t) return int;
 432    pragma Import (C, pthread_attr_destroy, "pthread_attr_destroy");
 433
 434    function pthread_attr_setdetachstate
 435      (attr        : access pthread_attr_t;
 436       detachstate : int) return int;
 437    --  FSU_THREADS has a nonstandard pthread_attr_setdetachstate
 438
 439    function pthread_attr_setstacksize
 440      (attr      : access pthread_attr_t;
 441       stacksize : size_t) return int;
 442    pragma Import (C, pthread_attr_setstacksize);
 443
 444    function pthread_create
 445      (thread        : access pthread_t;
 446       attributes    : access pthread_attr_t;
 447       start_routine : Thread_Body;
 448       arg           : System.Address) return int;
 449    pragma Import (C, pthread_create, "pthread_create");
 450
 451    procedure pthread_exit (status : System.Address);
 452    pragma Import (C, pthread_exit, "pthread_exit");
 453
 454    function pthread_self return pthread_t;
 455    pragma Import (C, pthread_self, "pthread_self");
 456
 457    --------------------------
 458    -- POSIX.1c  Section 17 --
 459    --------------------------
 460
 461    function pthread_setspecific
 462      (key   : pthread_key_t;
 463       value : System.Address) return  int;
 464    pragma Import (C, pthread_setspecific, "pthread_setspecific");
 465
 466    function pthread_getspecific (key : pthread_key_t) return System.Address;
 467    --  FSU_THREADS has a nonstandard pthread_getspecific
 468
 469    type destructor_pointer is access procedure (arg : System.Address);
 470
 471    function pthread_key_create
 472      (key        : access pthread_key_t;
 473       destructor : destructor_pointer) return int;
 474    pragma Import (C, pthread_key_create, "pthread_key_create");
 475
 476 private
 477
 478    type sigset_t is new unsigned_long;
 479    pragma Convention (C, sigset_t);
 480
 481    type pid_t is new int;
 482
 483    subtype time_t is long;
 484
 485    type timespec is record
 486       tv_sec  : time_t;
 487       tv_nsec : long;
 488    end record;
 489    pragma Convention (C, timespec);
 490
 491    type clockid_t is new int;
 492    CLOCK_REALTIME : constant clockid_t := 0;
 493
 494    type struct_timeval is record
 495       tv_sec  : time_t;
 496       tv_usec : long;
 497    end record;
 498    pragma Convention (C, struct_timeval);
 499
 500    type pthread_attr_t is record
 501       flags           : int;
 502       stacksize       : int;
 503       contentionscope : int;
 504       inheritsched    : int;
 505       detachstate     : int;
 506       sched           : int;
 507       prio            : int;
 508       starttime       : timespec;
 509       deadline        : timespec;
 510       period          : timespec;
 511    end record;
 512    pragma Convention (C_Pass_By_Copy, pthread_attr_t);
 513
 514    type pthread_condattr_t is record
 515       flags : int;
 516    end record;
 517    pragma Convention (C, pthread_condattr_t);
 518
 519    type pthread_mutexattr_t is record
 520       flags        : int;
 521       prio_ceiling : int;
 522       protocol     : int;
 523    end record;
 524    pragma Convention (C, pthread_mutexattr_t);
 525
 526    type sigjmp_buf is array (Integer range 0 .. 17) of int;
 527
 528    type pthread_t_struct is record
 529       context    : sigjmp_buf;
 530       pbody      : sigjmp_buf;
 531       errno      : int;
 532       ret        : int;
 533       stack_base : System.Address;
 534    end record;
 535    pragma Convention (C, pthread_t_struct);
 536
 537    type pthread_t is access all pthread_t_struct;
 538
 539    type queue_t is record
 540       head : System.Address;
 541       tail : System.Address;
 542    end record;
 543    pragma Convention (C, queue_t);
 544
 545    type pthread_mutex_t is record
 546       queue                 : queue_t;
 547       lock                  : plain_char;
 548       owner                 : System.Address;
 549       flags                 : int;
 550       prio_ceiling          : int;
 551       protocol              : int;
 552       prev_max_ceiling_prio : int;
 553    end record;
 554    pragma Convention (C, pthread_mutex_t);
 555
 556    type pthread_cond_t is record
 557       queue   : queue_t;
 558       flags   : int;
 559       waiters : int;
 560       mutex   : System.Address;
 561    end record;
 562    pragma Convention (C, pthread_cond_t);
 563
 564    type pthread_key_t is new int;
 565
 566 end System.OS_Interface;