gcc/ada/5rosinte.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 -- The GNARL files that were developed for RTEMS are maintained by  On-Line --
  35 -- Applications Research Corporation (http://www.oarcorp.com)  in  coopera- --
  36 -- tion with Ada Core Technologies Inc. and Florida State University.       --
  37 --                                                                          --
  38 ------------------------------------------------------------------------------
  39
  40 --  This is the RTEMS version of this package
  41
  42 --  These are guesses based on what I think the GNARL team will want to
  43 --  call the rtems configurations.  We use CPU-rtems for the rtems
  44 --  configurations.
  45
  46 --  This package encapsulates all direct interfaces to OS services
  47 --  that are needed by children of System.
  48
  49 --  PLEASE DO NOT add any with-clauses to this package
  50 --  or remove the pragma Elaborate_Body.
  51 --  It is designed to be a bottom-level (leaf) package.
  52
  53 with Interfaces.C;
  54 package System.OS_Interface is
  55    pragma Preelaborate;
  56
  57    --  This interface assumes that "unsigned" is a 32-bit entity.  This
  58    --  will correspond to RTEMS object ids.
  59
  60    subtype rtems_id       is Interfaces.C.unsigned;
  61
  62    subtype int            is Interfaces.C.int;
  63    subtype short          is Interfaces.C.short;
  64    subtype long           is Interfaces.C.long;
  65    subtype unsigned       is Interfaces.C.unsigned;
  66    subtype unsigned_short is Interfaces.C.unsigned_short;
  67    subtype unsigned_long  is Interfaces.C.unsigned_long;
  68    subtype unsigned_char  is Interfaces.C.unsigned_char;
  69    subtype plain_char     is Interfaces.C.plain_char;
  70    subtype size_t         is Interfaces.C.size_t;
  71
  72    -----------
  73    -- Errno --
  74    -----------
  75
  76    function errno return int;
  77    pragma Import (C, errno, "__get_errno");
  78
  79    EAGAIN    : constant := 11;
  80    EINTR     : constant := 4;
  81    EINVAL    : constant := 22;
  82    ENOMEM    : constant := 12;
  83    ETIMEDOUT : constant := 116;
  84
  85    -------------
  86    -- Signals --
  87    -------------
  88
  89    Max_Interrupt : constant := 31;
  90    type Signal is new int range 0 .. Max_Interrupt;
  91
  92    SIGHUP      : constant := 1; --  hangup
  93    SIGINT      : constant := 2; --  interrupt (rubout)
  94    SIGQUIT     : constant := 3; --  quit (ASCD FS)
  95    SIGILL      : constant := 4; --  illegal instruction (not reset)
  96    SIGTRAP     : constant := 5; --  trace trap (not reset)
  97    SIGIOT      : constant := 6; --  IOT instruction
  98    SIGABRT     : constant := 6; --  used by abort, replace SIGIOT in the future
  99    SIGEMT      : constant := 7; --  EMT instruction
 100    SIGFPE      : constant := 8; --  floating point exception
 101    SIGKILL     : constant := 9; --  kill (cannot be caught or ignored)
 102    SIGBUS      : constant := 10; --  bus error
 103    SIGSEGV     : constant := 11; --  segmentation violation
 104    SIGSYS      : constant := 12; --  bad argument to system call
 105    SIGPIPE     : constant := 13; --  write on a pipe with no one to read it
 106    SIGALRM     : constant := 14; --  alarm clock
 107    SIGTERM     : constant := 15; --  software termination signal from kill
 108    SIGUSR1     : constant := 16; --  user defined signal 1
 109    SIGUSR2     : constant := 17; --  user defined signal 2
 110
 111    SIGADAABORT : constant := SIGABRT;
 112
 113    type Signal_Set is array (Natural range <>) of Signal;
 114
 115    Unmasked    : constant Signal_Set := (SIGTRAP, SIGALRM, SIGEMT);
 116    Reserved    : constant Signal_Set := (1 .. 1 => SIGKILL);
 117
 118    type sigset_t is private;
 119
 120    function sigaddset (set : access sigset_t; sig : Signal) return int;
 121    pragma Import (C, sigaddset, "sigaddset");
 122
 123    function sigdelset (set : access sigset_t; sig : Signal) return int;
 124    pragma Import (C, sigdelset, "sigdelset");
 125
 126    function sigfillset (set : access sigset_t) return int;
 127    pragma Import (C, sigfillset, "sigfillset");
 128
 129    function sigismember (set : access sigset_t; sig : Signal) return int;
 130    pragma Import (C, sigismember, "sigismember");
 131
 132    function sigemptyset (set : access sigset_t) return int;
 133    pragma Import (C, sigemptyset, "sigemptyset");
 134
 135    type struct_sigaction is record
 136       sa_flags   : int;
 137       sa_mask    : sigset_t;
 138       sa_handler : System.Address;
 139    end record;
 140    pragma Convention (C, struct_sigaction);
 141    type struct_sigaction_ptr is access all struct_sigaction;
 142
 143    SIG_BLOCK   : constant := 1;
 144    SIG_UNBLOCK : constant := 2;
 145    SIG_SETMASK : constant := 3;
 146
 147    SIG_DFL : constant := 0;
 148    SIG_IGN : constant := 1;
 149
 150    function sigaction
 151      (sig  : Signal;
 152       act  : struct_sigaction_ptr;
 153       oact : struct_sigaction_ptr) return int;
 154    pragma Import (C, sigaction, "sigaction");
 155
 156    ----------
 157    -- Time --
 158    ----------
 159
 160    Time_Slice_Supported : constant Boolean := True;
 161    --  Indicates wether time slicing is supported (i.e SCHED_RR is supported)
 162
 163    type timespec is private;
 164
 165    type clockid_t is private;
 166
 167    CLOCK_REALTIME : constant clockid_t;
 168
 169    function clock_gettime
 170      (clock_id : clockid_t;
 171       tp       : access timespec) return int;
 172    pragma Import (C, clock_gettime, "clock_gettime");
 173
 174    function To_Duration (TS : timespec) return Duration;
 175    pragma Inline (To_Duration);
 176
 177    function To_Timespec (D : Duration) return timespec;
 178    pragma Inline (To_Timespec);
 179
 180    type struct_timeval is private;
 181
 182    function To_Duration (TV : struct_timeval) return Duration;
 183    pragma Inline (To_Duration);
 184
 185    function To_Timeval (D : Duration) return struct_timeval;
 186    pragma Inline (To_Timeval);
 187
 188    -------------------------
 189    -- Priority Scheduling --
 190    -------------------------
 191
 192    SCHED_FIFO  : constant := 1;
 193    SCHED_RR    : constant := 2;
 194    SCHED_OTHER : constant := 0;
 195
 196    -------------
 197    -- Process --
 198    -------------
 199
 200    type pid_t is private;
 201
 202    function kill (pid : pid_t; sig : Signal) return int;
 203    pragma Import (C, kill, "kill");
 204
 205    function getpid return pid_t;
 206    pragma Import (C, getpid, "getpid");
 207
 208    ---------
 209    -- LWP --
 210    ---------
 211
 212    function lwp_self return System.Address;
 213    --  lwp_self does not exist on this thread library, revert to pthread_self
 214    --  which is the closest approximation (with getpid). This function is
 215    --  needed to share 7staprop.adb across POSIX-like targets.
 216    pragma Import (C, lwp_self, "pthread_self");
 217
 218    -------------
 219    -- Threads --
 220    -------------
 221
 222    type Thread_Body is access
 223      function (arg : System.Address) return System.Address;
 224
 225    type pthread_t           is private;
 226    subtype Thread_Id        is pthread_t;
 227
 228    type pthread_mutex_t     is limited private;
 229    type pthread_cond_t      is limited private;
 230    type pthread_attr_t      is limited private;
 231    type pthread_mutexattr_t is limited private;
 232    type pthread_condattr_t  is limited private;
 233    type pthread_key_t       is private;
 234
 235    PTHREAD_CREATE_DETACHED : constant := 0;
 236
 237    -----------
 238    -- Stack --
 239    -----------
 240
 241    Stack_Base_Available : constant Boolean := False;
 242    --  Indicates wether the stack base is available on this target.
 243    --  This allows us to share s-osinte.adb between all the FSU/RTEMS
 244    --  run time.
 245    --  Note that this value can only be true if pthread_t has a complete
 246    --  definition that corresponds exactly to the C header files.
 247
 248    function Get_Stack_Base (thread : pthread_t) return Address;
 249    pragma Inline (Get_Stack_Base);
 250    --  returns the stack base of the specified thread.
 251    --  Only call this function when Stack_Base_Available is True.
 252
 253    --  These two functions are only needed to share s-taprop.adb with
 254    --  FSU threads.
 255
 256    function Get_Page_Size return size_t;
 257    function Get_Page_Size return Address;
 258    --  returns the size of a page, or 0 if this is not relevant on this
 259    --  target (which is the case for RTEMS)
 260
 261    PROT_ON  : constant := 0;
 262    PROT_OFF : constant := 0;
 263
 264    function mprotect (addr : Address; len : size_t; prot : int) return int;
 265    --  Do nothing on RTEMS.
 266
 267    -----------------------------------------
 268    --  Nonstandard Thread Initialization  --
 269    -----------------------------------------
 270
 271    procedure pthread_init;
 272    --  FSU_THREADS requires pthread_init, which is nonstandard
 273    --  and this should be invoked during the elaboration of s-taprop.adb
 274    --
 275    --  RTEMS does not require this so we provide an empty Ada body.
 276
 277    -------------------------
 278    -- POSIX.1c  Section 3 --
 279    -------------------------
 280
 281    function sigwait
 282      (set : access sigset_t;
 283       sig : access Signal) return int;
 284    pragma Import (C, sigwait, "sigwait");
 285
 286    function pthread_kill
 287      (thread : pthread_t;
 288       sig    : Signal) return int;
 289    pragma Import (C, pthread_kill, "pthread_kill");
 290
 291    type sigset_t_ptr is access all sigset_t;
 292
 293    function pthread_sigmask
 294      (how  : int;
 295       set  : sigset_t_ptr;
 296       oset : sigset_t_ptr) return int;
 297    pragma Import (C, pthread_sigmask, "pthread_sigmask");
 298
 299    ----------------------------
 300    --  POSIX.1c  Section 11  --
 301    ----------------------------
 302
 303    function pthread_mutexattr_init
 304      (attr : access pthread_mutexattr_t) return int;
 305    pragma Import (C, pthread_mutexattr_init, "pthread_mutexattr_init");
 306
 307    function pthread_mutexattr_destroy
 308      (attr : access pthread_mutexattr_t) return int;
 309    pragma Import (C, pthread_mutexattr_destroy, "pthread_mutexattr_destroy");
 310
 311    function pthread_mutex_init
 312      (mutex : access pthread_mutex_t;
 313       attr  : access pthread_mutexattr_t) return int;
 314    pragma Import (C, pthread_mutex_init, "pthread_mutex_init");
 315
 316    function pthread_mutex_destroy (mutex : access pthread_mutex_t) return int;
 317    pragma Import (C, pthread_mutex_destroy, "pthread_mutex_destroy");
 318
 319    function pthread_mutex_lock (mutex : access pthread_mutex_t) return int;
 320    pragma Import (C, pthread_mutex_lock, "pthread_mutex_lock");
 321
 322    function pthread_mutex_unlock (mutex : access pthread_mutex_t) return int;
 323    pragma Import (C, pthread_mutex_unlock, "pthread_mutex_unlock");
 324
 325    function pthread_condattr_init
 326      (attr : access pthread_condattr_t) return int;
 327    pragma Import (C, pthread_condattr_init, "pthread_condattr_init");
 328
 329    function pthread_condattr_destroy
 330      (attr : access pthread_condattr_t) return int;
 331    pragma Import (C, pthread_condattr_destroy, "pthread_condattr_destroy");
 332
 333    function pthread_cond_init
 334      (cond : access pthread_cond_t;
 335       attr : access pthread_condattr_t) return int;
 336    pragma Import (C, pthread_cond_init, "pthread_cond_init");
 337
 338    function pthread_cond_destroy (cond : access pthread_cond_t) return int;
 339    pragma Import (C, pthread_cond_destroy, "pthread_cond_destroy");
 340
 341    function pthread_cond_signal (cond : access pthread_cond_t) return int;
 342    pragma Import (C, pthread_cond_signal, "pthread_cond_signal");
 343
 344    function pthread_cond_wait
 345      (cond  : access pthread_cond_t;
 346       mutex : access pthread_mutex_t) return int;
 347    pragma Import (C, pthread_cond_wait, "pthread_cond_wait");
 348
 349    function pthread_cond_timedwait
 350      (cond    : access pthread_cond_t;
 351       mutex   : access pthread_mutex_t;
 352       abstime : access timespec) return int;
 353    pragma Import (C, pthread_cond_timedwait, "pthread_cond_timedwait");
 354
 355    Relative_Timed_Wait : constant Boolean := False;
 356    --  pthread_cond_timedwait requires an absolute delay time
 357
 358    --------------------------
 359    -- POSIX.1c  Section 13 --
 360    --------------------------
 361
 362    PTHREAD_PRIO_NONE    : constant := 0;
 363    PTHREAD_PRIO_PROTECT : constant := 2;
 364    PTHREAD_PRIO_INHERIT : constant := 1;
 365
 366    function pthread_mutexattr_setprotocol
 367      (attr     : access pthread_mutexattr_t;
 368       protocol : int) return int;
 369    pragma Import (C, pthread_mutexattr_setprotocol);
 370
 371    function pthread_mutexattr_setprioceiling
 372      (attr     : access pthread_mutexattr_t;
 373       prioceiling : int) return int;
 374    pragma Import
 375      (C, pthread_mutexattr_setprioceiling,
 376       "pthread_mutexattr_setprioceiling");
 377
 378    type struct_sched_param is record
 379       sched_priority      : int;
 380       ss_low_priority     : timespec;
 381       ss_replenish_period : timespec;
 382       ss_initial_budget   : timespec;
 383    end record;
 384    pragma Convention (C, struct_sched_param);
 385
 386    function pthread_setschedparam
 387      (thread : pthread_t;
 388       policy : int;
 389       param  : access struct_sched_param) return int;
 390    pragma Import (C, pthread_setschedparam, "pthread_setschedparam");
 391
 392    function pthread_attr_setscope
 393      (attr            : access pthread_attr_t;
 394       contentionscope : int) return int;
 395    pragma Import (C, pthread_attr_setscope, "pthread_attr_setscope");
 396
 397    function pthread_attr_setinheritsched
 398      (attr         : access pthread_attr_t;
 399       inheritsched : int) return int;
 400    pragma Import (C, pthread_attr_setinheritsched);
 401
 402    function pthread_attr_setschedpolicy
 403      (attr   : access pthread_attr_t;
 404       policy : int) return int;
 405    pragma Import (C, pthread_attr_setschedpolicy);
 406
 407    function pthread_attr_setschedparam
 408      (attr        : access pthread_attr_t;
 409       sched_param : int) return int;
 410    pragma Import (C, pthread_attr_setschedparam);
 411
 412    function sched_yield return int;
 413    pragma Import (C, sched_yield, "sched_yield");
 414
 415    ---------------------------
 416    -- P1003.1c - Section 16 --
 417    ---------------------------
 418
 419    function pthread_attr_init (attributes : access pthread_attr_t) return int;
 420    pragma Import (C, pthread_attr_init, "pthread_attr_init");
 421
 422    function pthread_attr_destroy
 423      (attributes : access pthread_attr_t) return int;
 424    pragma Import (C, pthread_attr_destroy, "pthread_attr_destroy");
 425
 426    function pthread_attr_setdetachstate
 427      (attr        : access pthread_attr_t;
 428       detachstate : int) return int;
 429    pragma Import (C, pthread_attr_setdetachstate);
 430
 431    function pthread_attr_setstacksize
 432      (attr      : access pthread_attr_t;
 433       stacksize : size_t) return int;
 434    pragma Import (C, pthread_attr_setstacksize, "pthread_attr_setstacksize");
 435
 436    function pthread_create
 437      (thread        : access pthread_t;
 438       attributes    : access pthread_attr_t;
 439       start_routine : Thread_Body;
 440       arg           : System.Address) return int;
 441    pragma Import (C, pthread_create, "pthread_create");
 442
 443    procedure pthread_exit (status : System.Address);
 444    pragma Import (C, pthread_exit, "pthread_exit");
 445
 446    function pthread_self return pthread_t;
 447    pragma Import (C, pthread_self, "pthread_self");
 448
 449    --------------------------
 450    -- POSIX.1c  Section 17 --
 451    --------------------------
 452
 453    function pthread_setspecific
 454      (key   : pthread_key_t;
 455       value : System.Address) return int;
 456    pragma Import (C, pthread_setspecific, "pthread_setspecific");
 457
 458    function pthread_getspecific (key : pthread_key_t) return System.Address;
 459    pragma Import (C, pthread_getspecific, "pthread_getspecific");
 460
 461    type destructor_pointer is access procedure (arg : System.Address);
 462
 463    function pthread_key_create
 464      (key        : access pthread_key_t;
 465       destructor : destructor_pointer) return int;
 466    pragma Import (C, pthread_key_create, "pthread_key_create");
 467
 468 private
 469
 470    type sigset_t is new int;
 471
 472    type pid_t is new int;
 473
 474    type time_t is new long;
 475
 476    type timespec is record
 477       tv_sec  : time_t;
 478       tv_nsec : long;
 479    end record;
 480    pragma Convention (C, timespec);
 481
 482    type clockid_t is new rtems_id;
 483    CLOCK_REALTIME : constant clockid_t := 1;
 484
 485    type struct_timeval is record
 486       tv_sec  : int;
 487       tv_usec : int;
 488    end record;
 489    pragma Convention (C, struct_timeval);
 490
 491    type pthread_attr_t is record
 492       is_initialized  : int;
 493       stackaddr       : System.Address;
 494       stacksize       : int;
 495       contentionscope : int;
 496       inheritsched    : int;
 497       schedpolicy     : int;
 498       schedparam      : struct_sched_param;
 499       cputime_clocked_allowed : int;
 500       deatchstate     : int;
 501    end record;
 502    pragma Convention (C, pthread_attr_t);
 503
 504    type pthread_condattr_t is record
 505       flags        : int;
 506    end record;
 507    pragma Convention (C, pthread_condattr_t);
 508
 509    type pthread_mutexattr_t is record
 510       is_initialized  : int;
 511       process_shared  : int;
 512       prio_ceiling    : int;
 513       protocol        : int;
 514       recursive       : int;
 515    end record;
 516    pragma Convention (C, pthread_mutexattr_t);
 517
 518    type pthread_t is new rtems_id;
 519
 520    type pthread_mutex_t is new rtems_id;
 521
 522    type pthread_cond_t is new rtems_id;
 523
 524    type pthread_key_t is new rtems_id;
 525
 526 end System.OS_Interface;