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 --                             $Revision: 1.22 $
  10 --                                                                          --
  11 --          Copyright (C) 1997-2001 Free Software Foundation, Inc.          --
  12 --                                                                          --
  13 -- GNARL is free software; you can  redistribute it  and/or modify it under --
  14 -- terms of the  GNU General Public License as published  by the Free Soft- --
  15 -- ware  Foundation;  either version 2,  or (at your option) any later ver- --
  16 -- sion. GNARL is distributed in the hope that it will be useful, but WITH- --
  17 -- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
  18 -- or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License --
  19 -- for  more details.  You should have  received  a copy of the GNU General --
  20 -- Public License  distributed with GNARL; see file COPYING.  If not, write --
  21 -- to  the Free Software Foundation,  59 Temple Place - Suite 330,  Boston, --
  22 -- MA 02111-1307, USA.                                                      --
  23 --                                                                          --
  24 -- As a special exception,  if other files  instantiate  generics from this --
  25 -- unit, or you link  this unit with other files  to produce an executable, --
  26 -- this  unit  does not  by itself cause  the resulting  executable  to  be --
  27 -- covered  by the  GNU  General  Public  License.  This exception does not --
  28 -- however invalidate  any other reasons why  the executable file  might be --
  29 -- covered by the  GNU Public License.                                      --
  30 --                                                                          --
  31 -- GNARL was developed by the GNARL team at Florida State University. It is --
  32 -- now maintained by Ada Core Technologies Inc. in cooperation with Florida --
  33 -- State University (http://www.gnat.com).                                  --
  34 --                                                                          --
  35 -- The GNARL files that were developed for RTEMS are maintained by  On-Line --
  36 -- Applications Research Corporation (http://www.oarcorp.com)  in  coopera- --
  37 -- tion with Ada Core Technologies Inc. and Florida State University.       --
  38 --                                                                          --
  39 ------------------------------------------------------------------------------
  40
  41 --  This is the RTEMS version of this package
  42
  43 --  These are guesses based on what I think the GNARL team will want to
  44 --  call the rtems configurations.  We use CPU-rtems for the rtems
  45 --  configurations.
  46
  47 --  This package encapsulates all direct interfaces to OS services
  48 --  that are needed by children of System.
  49
  50 --  PLEASE DO NOT add any with-clauses to this package
  51 --  or remove the pragma Elaborate_Body.
  52 --  It is designed to be a bottom-level (leaf) package.
  53
  54 with Interfaces.C;
  55 package System.OS_Interface is
  56    pragma Preelaborate;
  57
  58    --  This interface assumes that "unsigned" is a 32-bit entity.  This
  59    --  will correspond to RTEMS object ids.
  60
  61    subtype rtems_id       is Interfaces.C.unsigned;
  62
  63    subtype int            is Interfaces.C.int;
  64    subtype short          is Interfaces.C.short;
  65    subtype long           is Interfaces.C.long;
  66    subtype unsigned       is Interfaces.C.unsigned;
  67    subtype unsigned_short is Interfaces.C.unsigned_short;
  68    subtype unsigned_long  is Interfaces.C.unsigned_long;
  69    subtype unsigned_char  is Interfaces.C.unsigned_char;
  70    subtype plain_char     is Interfaces.C.plain_char;
  71    subtype size_t         is Interfaces.C.size_t;
  72
  73    -----------
  74    -- Errno --
  75    -----------
  76
  77    function errno return int;
  78    pragma Import (C, errno, "__get_errno");
  79
  80    EAGAIN    : constant := 11;
  81    EINTR     : constant := 4;
  82    EINVAL    : constant := 22;
  83    ENOMEM    : constant := 12;
  84    ETIMEDOUT : constant := 116;
  85
  86    -------------
  87    -- Signals --
  88    -------------
  89
  90    Max_Interrupt : constant := 31;
  91    type Signal is new int range 0 .. Max_Interrupt;
  92
  93    SIGHUP      : constant := 1; --  hangup
  94    SIGINT      : constant := 2; --  interrupt (rubout)
  95    SIGQUIT     : constant := 3; --  quit (ASCD FS)
  96    SIGILL      : constant := 4; --  illegal instruction (not reset)
  97    SIGTRAP     : constant := 5; --  trace trap (not reset)
  98    SIGIOT      : constant := 6; --  IOT instruction
  99    SIGABRT     : constant := 6; --  used by abort, replace SIGIOT in the future
 100    SIGEMT      : constant := 7; --  EMT instruction
 101    SIGFPE      : constant := 8; --  floating point exception
 102    SIGKILL     : constant := 9; --  kill (cannot be caught or ignored)
 103    SIGBUS      : constant := 10; --  bus error
 104    SIGSEGV     : constant := 11; --  segmentation violation
 105    SIGSYS      : constant := 12; --  bad argument to system call
 106    SIGPIPE     : constant := 13; --  write on a pipe with no one to read it
 107    SIGALRM     : constant := 14; --  alarm clock
 108    SIGTERM     : constant := 15; --  software termination signal from kill
 109    SIGUSR1     : constant := 16; --  user defined signal 1
 110    SIGUSR2     : constant := 17; --  user defined signal 2
 111
 112    SIGADAABORT : constant := SIGABRT;
 113
 114    type Signal_Set is array (Natural range <>) of Signal;
 115
 116    Unmasked    : constant Signal_Set := (SIGTRAP, SIGALRM, SIGEMT);
 117    Reserved    : constant Signal_Set := (1 .. 1 => SIGKILL);
 118
 119    type sigset_t is private;
 120
 121    function sigaddset (set : access sigset_t; sig : Signal) return int;
 122    pragma Import (C, sigaddset, "sigaddset");
 123
 124    function sigdelset (set : access sigset_t; sig : Signal) return int;
 125    pragma Import (C, sigdelset, "sigdelset");
 126
 127    function sigfillset (set : access sigset_t) return int;
 128    pragma Import (C, sigfillset, "sigfillset");
 129
 130    function sigismember (set : access sigset_t; sig : Signal) return int;
 131    pragma Import (C, sigismember, "sigismember");
 132
 133    function sigemptyset (set : access sigset_t) return int;
 134    pragma Import (C, sigemptyset, "sigemptyset");
 135
 136    type struct_sigaction is record
 137       sa_flags   : int;
 138       sa_mask    : sigset_t;
 139       sa_handler : System.Address;
 140    end record;
 141    pragma Convention (C, struct_sigaction);
 142    type struct_sigaction_ptr is access all struct_sigaction;
 143
 144    SIG_BLOCK   : constant := 1;
 145    SIG_UNBLOCK : constant := 2;
 146    SIG_SETMASK : constant := 3;
 147
 148    SIG_DFL : constant := 0;
 149    SIG_IGN : constant := 1;
 150
 151    function sigaction
 152      (sig  : Signal;
 153       act  : struct_sigaction_ptr;
 154       oact : struct_sigaction_ptr) return int;
 155    pragma Import (C, sigaction, "sigaction");
 156
 157    ----------
 158    -- Time --
 159    ----------
 160
 161    Time_Slice_Supported : constant Boolean := True;
 162    --  Indicates wether time slicing is supported (i.e SCHED_RR is supported)
 163
 164    type timespec is private;
 165
 166    type clockid_t is private;
 167
 168    CLOCK_REALTIME : constant clockid_t;
 169
 170    function clock_gettime
 171      (clock_id : clockid_t;
 172       tp       : access timespec) return int;
 173    pragma Import (C, clock_gettime, "clock_gettime");
 174
 175    function To_Duration (TS : timespec) return Duration;
 176    pragma Inline (To_Duration);
 177
 178    function To_Timespec (D : Duration) return timespec;
 179    pragma Inline (To_Timespec);
 180
 181    type struct_timeval is private;
 182
 183    function To_Duration (TV : struct_timeval) return Duration;
 184    pragma Inline (To_Duration);
 185
 186    function To_Timeval (D : Duration) return struct_timeval;
 187    pragma Inline (To_Timeval);
 188
 189    -------------------------
 190    -- Priority Scheduling --
 191    -------------------------
 192
 193    SCHED_FIFO  : constant := 1;
 194    SCHED_RR    : constant := 2;
 195    SCHED_OTHER : constant := 0;
 196
 197    -------------
 198    -- Process --
 199    -------------
 200
 201    type pid_t is private;
 202
 203    function kill (pid : pid_t; sig : Signal) return int;
 204    pragma Import (C, kill, "kill");
 205
 206    function getpid return pid_t;
 207    pragma Import (C, getpid, "getpid");
 208
 209    ---------
 210    -- LWP --
 211    ---------
 212
 213    function lwp_self return System.Address;
 214    --  lwp_self does not exist on this thread library, revert to pthread_self
 215    --  which is the closest approximation (with getpid). This function is
 216    --  needed to share 7staprop.adb across POSIX-like targets.
 217    pragma Import (C, lwp_self, "pthread_self");
 218
 219    -------------
 220    -- Threads --
 221    -------------
 222
 223    type Thread_Body is access
 224      function (arg : System.Address) return System.Address;
 225
 226    type pthread_t           is private;
 227    subtype Thread_Id        is pthread_t;
 228
 229    type pthread_mutex_t     is limited private;
 230    type pthread_cond_t      is limited private;
 231    type pthread_attr_t      is limited private;
 232    type pthread_mutexattr_t is limited private;
 233    type pthread_condattr_t  is limited private;
 234    type pthread_key_t       is private;
 235
 236    PTHREAD_CREATE_DETACHED : constant := 0;
 237
 238    -----------
 239    -- Stack --
 240    -----------
 241
 242    Stack_Base_Available : constant Boolean := False;
 243    --  Indicates wether the stack base is available on this target.
 244    --  This allows us to share s-osinte.adb between all the FSU/RTEMS
 245    --  run time.
 246    --  Note that this value can only be true if pthread_t has a complete
 247    --  definition that corresponds exactly to the C header files.
 248
 249    function Get_Stack_Base (thread : pthread_t) return Address;
 250    pragma Inline (Get_Stack_Base);
 251    --  returns the stack base of the specified thread.
 252    --  Only call this function when Stack_Base_Available is True.
 253
 254    --  These two functions are only needed to share s-taprop.adb with
 255    --  FSU threads.
 256
 257    function Get_Page_Size return size_t;
 258    function Get_Page_Size return Address;
 259    --  returns the size of a page, or 0 if this is not relevant on this
 260    --  target (which is the case for RTEMS)
 261
 262    PROT_ON  : constant := 0;
 263    PROT_OFF : constant := 0;
 264
 265    function mprotect (addr : Address; len : size_t; prot : int) return int;
 266    --  Do nothing on RTEMS.
 267
 268    -----------------------------------------
 269    --  Nonstandard Thread Initialization  --
 270    -----------------------------------------
 271
 272    procedure pthread_init;
 273    --  FSU_THREADS requires pthread_init, which is nonstandard
 274    --  and this should be invoked during the elaboration of s-taprop.adb
 275    --
 276    --  RTEMS does not require this so we provide an empty Ada body.
 277
 278    -------------------------
 279    -- POSIX.1c  Section 3 --
 280    -------------------------
 281
 282    function sigwait
 283      (set : access sigset_t;
 284       sig : access Signal) return int;
 285    pragma Import (C, sigwait, "sigwait");
 286
 287    function pthread_kill
 288      (thread : pthread_t;
 289       sig    : Signal) return int;
 290    pragma Import (C, pthread_kill, "pthread_kill");
 291
 292    type sigset_t_ptr is access all sigset_t;
 293
 294    function pthread_sigmask
 295      (how  : int;
 296       set  : sigset_t_ptr;
 297       oset : sigset_t_ptr) return int;
 298    pragma Import (C, pthread_sigmask, "pthread_sigmask");
 299
 300    ----------------------------
 301    --  POSIX.1c  Section 11  --
 302    ----------------------------
 303
 304    function pthread_mutexattr_init
 305      (attr : access pthread_mutexattr_t) return int;
 306    pragma Import (C, pthread_mutexattr_init, "pthread_mutexattr_init");
 307
 308    function pthread_mutexattr_destroy
 309      (attr : access pthread_mutexattr_t) return int;
 310    pragma Import (C, pthread_mutexattr_destroy, "pthread_mutexattr_destroy");
 311
 312    function pthread_mutex_init
 313      (mutex : access pthread_mutex_t;
 314       attr  : access pthread_mutexattr_t) return int;
 315    pragma Import (C, pthread_mutex_init, "pthread_mutex_init");
 316
 317    function pthread_mutex_destroy (mutex : access pthread_mutex_t) return int;
 318    pragma Import (C, pthread_mutex_destroy, "pthread_mutex_destroy");
 319
 320    function pthread_mutex_lock (mutex : access pthread_mutex_t) return int;
 321    pragma Import (C, pthread_mutex_lock, "pthread_mutex_lock");
 322
 323    function pthread_mutex_unlock (mutex : access pthread_mutex_t) return int;
 324    pragma Import (C, pthread_mutex_unlock, "pthread_mutex_unlock");
 325
 326    function pthread_condattr_init
 327      (attr : access pthread_condattr_t) return int;
 328    pragma Import (C, pthread_condattr_init, "pthread_condattr_init");
 329
 330    function pthread_condattr_destroy
 331      (attr : access pthread_condattr_t) return int;
 332    pragma Import (C, pthread_condattr_destroy, "pthread_condattr_destroy");
 333
 334    function pthread_cond_init
 335      (cond : access pthread_cond_t;
 336       attr : access pthread_condattr_t) return int;
 337    pragma Import (C, pthread_cond_init, "pthread_cond_init");
 338
 339    function pthread_cond_destroy (cond : access pthread_cond_t) return int;
 340    pragma Import (C, pthread_cond_destroy, "pthread_cond_destroy");
 341
 342    function pthread_cond_signal (cond : access pthread_cond_t) return int;
 343    pragma Import (C, pthread_cond_signal, "pthread_cond_signal");
 344
 345    function pthread_cond_wait
 346      (cond  : access pthread_cond_t;
 347       mutex : access pthread_mutex_t) return int;
 348    pragma Import (C, pthread_cond_wait, "pthread_cond_wait");
 349
 350    function pthread_cond_timedwait
 351      (cond    : access pthread_cond_t;
 352       mutex   : access pthread_mutex_t;
 353       abstime : access timespec) return int;
 354    pragma Import (C, pthread_cond_timedwait, "pthread_cond_timedwait");
 355
 356    Relative_Timed_Wait : constant Boolean := False;
 357    --  pthread_cond_timedwait requires an absolute delay time
 358
 359    --------------------------
 360    -- POSIX.1c  Section 13 --
 361    --------------------------
 362
 363    PTHREAD_PRIO_NONE    : constant := 0;
 364    PTHREAD_PRIO_PROTECT : constant := 2;
 365    PTHREAD_PRIO_INHERIT : constant := 1;
 366
 367    function pthread_mutexattr_setprotocol
 368      (attr     : access pthread_mutexattr_t;
 369       protocol : int) return int;
 370    pragma Import (C, pthread_mutexattr_setprotocol);
 371
 372    function pthread_mutexattr_setprioceiling
 373      (attr     : access pthread_mutexattr_t;
 374       prioceiling : int) return int;
 375    pragma Import
 376      (C, pthread_mutexattr_setprioceiling,
 377       "pthread_mutexattr_setprioceiling");
 378
 379    type struct_sched_param is record
 380       sched_priority      : int;
 381       ss_low_priority     : timespec;
 382       ss_replenish_period : timespec;
 383       ss_initial_budget   : timespec;
 384    end record;
 385    pragma Convention (C, struct_sched_param);
 386
 387    function pthread_setschedparam
 388      (thread : pthread_t;
 389       policy : int;
 390       param  : access struct_sched_param) return int;
 391    pragma Import (C, pthread_setschedparam, "pthread_setschedparam");
 392
 393    function pthread_attr_setscope
 394      (attr            : access pthread_attr_t;
 395       contentionscope : int) return int;
 396    pragma Import (C, pthread_attr_setscope, "pthread_attr_setscope");
 397
 398    function pthread_attr_setinheritsched
 399      (attr         : access pthread_attr_t;
 400       inheritsched : int) return int;
 401    pragma Import (C, pthread_attr_setinheritsched);
 402
 403    function pthread_attr_setschedpolicy
 404      (attr   : access pthread_attr_t;
 405       policy : int) return int;
 406    pragma Import (C, pthread_attr_setschedpolicy);
 407
 408    function pthread_attr_setschedparam
 409      (attr        : access pthread_attr_t;
 410       sched_param : int) return int;
 411    pragma Import (C, pthread_attr_setschedparam);
 412
 413    function sched_yield return int;
 414    pragma Import (C, sched_yield, "sched_yield");
 415
 416    ---------------------------
 417    -- P1003.1c - Section 16 --
 418    ---------------------------
 419
 420    function pthread_attr_init (attributes : access pthread_attr_t) return int;
 421    pragma Import (C, pthread_attr_init, "pthread_attr_init");
 422
 423    function pthread_attr_destroy
 424      (attributes : access pthread_attr_t) return int;
 425    pragma Import (C, pthread_attr_destroy, "pthread_attr_destroy");
 426
 427    function pthread_attr_setdetachstate
 428      (attr        : access pthread_attr_t;
 429       detachstate : int) return int;
 430    pragma Import (C, pthread_attr_setdetachstate);
 431
 432    function pthread_attr_setstacksize
 433      (attr      : access pthread_attr_t;
 434       stacksize : size_t) return int;
 435    pragma Import (C, pthread_attr_setstacksize, "pthread_attr_setstacksize");
 436
 437    function pthread_create
 438      (thread        : access pthread_t;
 439       attributes    : access pthread_attr_t;
 440       start_routine : Thread_Body;
 441       arg           : System.Address) return int;
 442    pragma Import (C, pthread_create, "pthread_create");
 443
 444    procedure pthread_exit (status : System.Address);
 445    pragma Import (C, pthread_exit, "pthread_exit");
 446
 447    function pthread_self return pthread_t;
 448    pragma Import (C, pthread_self, "pthread_self");
 449
 450    --------------------------
 451    -- POSIX.1c  Section 17 --
 452    --------------------------
 453
 454    function pthread_setspecific
 455      (key   : pthread_key_t;
 456       value : System.Address) return int;
 457    pragma Import (C, pthread_setspecific, "pthread_setspecific");
 458
 459    function pthread_getspecific (key : pthread_key_t) return System.Address;
 460    pragma Import (C, pthread_getspecific, "pthread_getspecific");
 461
 462    type destructor_pointer is access procedure (arg : System.Address);
 463
 464    function pthread_key_create
 465      (key        : access pthread_key_t;
 466       destructor : destructor_pointer) return int;
 467    pragma Import (C, pthread_key_create, "pthread_key_create");
 468
 469 private
 470
 471    type sigset_t is new int;
 472
 473    type pid_t is new int;
 474
 475    type time_t is new long;
 476
 477    type timespec is record
 478       tv_sec  : time_t;
 479       tv_nsec : long;
 480    end record;
 481    pragma Convention (C, timespec);
 482
 483    type clockid_t is new rtems_id;
 484    CLOCK_REALTIME : constant clockid_t := 1;
 485
 486    type struct_timeval is record
 487       tv_sec  : int;
 488       tv_usec : int;
 489    end record;
 490    pragma Convention (C, struct_timeval);
 491
 492    type pthread_attr_t is record
 493       is_initialized  : int;
 494       stackaddr       : System.Address;
 495       stacksize       : int;
 496       contentionscope : int;
 497       inheritsched    : int;
 498       schedpolicy     : int;
 499       schedparam      : struct_sched_param;
 500       cputime_clocked_allowed : int;
 501       deatchstate     : int;
 502    end record;
 503    pragma Convention (C, pthread_attr_t);
 504
 505    type pthread_condattr_t is record
 506       flags        : int;
 507    end record;
 508    pragma Convention (C, pthread_condattr_t);
 509
 510    type pthread_mutexattr_t is record
 511       is_initialized  : int;
 512       process_shared  : int;
 513       prio_ceiling    : int;
 514       protocol        : int;
 515       recursive       : int;
 516    end record;
 517    pragma Convention (C, pthread_mutexattr_t);
 518
 519    type pthread_t is new rtems_id;
 520
 521    type pthread_mutex_t is new rtems_id;
 522
 523    type pthread_cond_t is new rtems_id;
 524
 525    type pthread_key_t is new rtems_id;
 526
 527 end System.OS_Interface;