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 --          Copyright (C) 1997-2003 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 -- The GNARL files that were developed for RTEMS are maintained by  On-Line --
  33 -- Applications Research Corporation (http://www.oarcorp.com)  in  coopera- --
  34 -- tion with Ada Core Technologies Inc. and Florida State University.       --
  35 --                                                                          --
  36 ------------------------------------------------------------------------------
  37
  38 --  This is the RTEMS version of this package
  39
  40 --  These are guesses based on what I think the GNARL team will want to
  41 --  call the rtems configurations.  We use CPU-rtems for the rtems
  42 --  configurations.
  43
  44 --  This package encapsulates all direct interfaces to OS services
  45 --  that are needed by children of System.
  46
  47 --  PLEASE DO NOT add any with-clauses to this package
  48 --  or remove the pragma Elaborate_Body.
  49 --  It is designed to be a bottom-level (leaf) package.
  50
  51 with Interfaces.C;
  52 package System.OS_Interface is
  53    pragma Preelaborate;
  54
  55    --  This interface assumes that "unsigned" is a 32-bit entity.  This
  56    --  will correspond to RTEMS object ids.
  57
  58    subtype rtems_id       is Interfaces.C.unsigned;
  59
  60    subtype int            is Interfaces.C.int;
  61    subtype short          is Interfaces.C.short;
  62    subtype long           is Interfaces.C.long;
  63    subtype unsigned       is Interfaces.C.unsigned;
  64    subtype unsigned_short is Interfaces.C.unsigned_short;
  65    subtype unsigned_long  is Interfaces.C.unsigned_long;
  66    subtype unsigned_char  is Interfaces.C.unsigned_char;
  67    subtype plain_char     is Interfaces.C.plain_char;
  68    subtype size_t         is Interfaces.C.size_t;
  69
  70    -----------
  71    -- Errno --
  72    -----------
  73
  74    function errno return int;
  75    pragma Import (C, errno, "__get_errno");
  76
  77    EAGAIN    : constant := 11;
  78    EINTR     : constant := 4;
  79    EINVAL    : constant := 22;
  80    ENOMEM    : constant := 12;
  81    ETIMEDOUT : constant := 116;
  82
  83    -------------
  84    -- Signals --
  85    -------------
  86
  87    Max_Interrupt : constant := 31;
  88    type Signal is new int range 0 .. Max_Interrupt;
  89
  90    SIGXCPU     : constant := 0; --  XCPU
  91    SIGHUP      : constant := 1; --  hangup
  92    SIGINT      : constant := 2; --  interrupt (rubout)
  93    SIGQUIT     : constant := 3; --  quit (ASCD FS)
  94    SIGILL      : constant := 4; --  illegal instruction (not reset)
  95    SIGTRAP     : constant := 5; --  trace trap (not reset)
  96    SIGIOT      : constant := 6; --  IOT instruction
  97    SIGABRT     : constant := 6; --  used by abort, replace SIGIOT in the future
  98    SIGEMT      : constant := 7; --  EMT instruction
  99    SIGFPE      : constant := 8; --  floating point exception
 100    SIGKILL     : constant := 9; --  kill (cannot be caught or ignored)
 101    SIGBUS      : constant := 10; --  bus error
 102    SIGSEGV     : constant := 11; --  segmentation violation
 103    SIGSYS      : constant := 12; --  bad argument to system call
 104    SIGPIPE     : constant := 13; --  write on a pipe with no one to read it
 105    SIGALRM     : constant := 14; --  alarm clock
 106    SIGTERM     : constant := 15; --  software termination signal from kill
 107    SIGUSR1     : constant := 16; --  user defined signal 1
 108    SIGUSR2     : constant := 17; --  user defined signal 2
 109
 110    SIGADAABORT : constant := SIGABRT;
 111
 112    type Signal_Set is array (Natural range <>) of Signal;
 113
 114    Unmasked    : constant Signal_Set := (SIGTRAP, SIGALRM, SIGEMT);
 115    Reserved    : constant Signal_Set := (1 .. 1 => SIGKILL);
 116
 117    type sigset_t is private;
 118
 119    function sigaddset (set : access sigset_t; sig : Signal) return int;
 120    pragma Import (C, sigaddset, "sigaddset");
 121
 122    function sigdelset (set : access sigset_t; sig : Signal) return int;
 123    pragma Import (C, sigdelset, "sigdelset");
 124
 125    function sigfillset (set : access sigset_t) return int;
 126    pragma Import (C, sigfillset, "sigfillset");
 127
 128    function sigismember (set : access sigset_t; sig : Signal) return int;
 129    pragma Import (C, sigismember, "sigismember");
 130
 131    function sigemptyset (set : access sigset_t) return int;
 132    pragma Import (C, sigemptyset, "sigemptyset");
 133
 134    type struct_sigaction is record
 135       sa_flags   : int;
 136       sa_mask    : sigset_t;
 137       sa_handler : System.Address;
 138    end record;
 139    pragma Convention (C, struct_sigaction);
 140    type struct_sigaction_ptr is access all struct_sigaction;
 141
 142    SIG_BLOCK   : constant := 1;
 143    SIG_UNBLOCK : constant := 2;
 144    SIG_SETMASK : constant := 3;
 145
 146    SIG_DFL : constant := 0;
 147    SIG_IGN : constant := 1;
 148
 149    function sigaction
 150      (sig  : Signal;
 151       act  : struct_sigaction_ptr;
 152       oact : struct_sigaction_ptr) return int;
 153    pragma Import (C, sigaction, "sigaction");
 154
 155    ----------
 156    -- Time --
 157    ----------
 158
 159    Time_Slice_Supported : constant Boolean := True;
 160    --  Indicates wether time slicing is supported (i.e SCHED_RR is supported)
 161
 162    type timespec is private;
 163
 164    type clockid_t is private;
 165
 166    CLOCK_REALTIME : constant clockid_t;
 167
 168    function clock_gettime
 169      (clock_id : clockid_t;
 170       tp       : access timespec) return int;
 171    pragma Import (C, clock_gettime, "clock_gettime");
 172
 173    function To_Duration (TS : timespec) return Duration;
 174    pragma Inline (To_Duration);
 175
 176    function To_Timespec (D : Duration) return timespec;
 177    pragma Inline (To_Timespec);
 178
 179    type struct_timeval is private;
 180
 181    function To_Duration (TV : struct_timeval) return Duration;
 182    pragma Inline (To_Duration);
 183
 184    function To_Timeval (D : Duration) return struct_timeval;
 185    pragma Inline (To_Timeval);
 186
 187    -------------------------
 188    -- Priority Scheduling --
 189    -------------------------
 190
 191    SCHED_FIFO  : constant := 1;
 192    SCHED_RR    : constant := 2;
 193    SCHED_OTHER : constant := 0;
 194
 195    -------------
 196    -- Process --
 197    -------------
 198
 199    type pid_t is private;
 200
 201    function kill (pid : pid_t; sig : Signal) return int;
 202    pragma Import (C, kill, "kill");
 203
 204    function getpid return pid_t;
 205    pragma Import (C, getpid, "getpid");
 206
 207    ---------
 208    -- LWP --
 209    ---------
 210
 211    function lwp_self return System.Address;
 212    --  lwp_self does not exist on this thread library, revert to pthread_self
 213    --  which is the closest approximation (with getpid). This function is
 214    --  needed to share 7staprop.adb across POSIX-like targets.
 215    pragma Import (C, lwp_self, "pthread_self");
 216
 217    -------------
 218    -- Threads --
 219    -------------
 220
 221    type Thread_Body is access
 222      function (arg : System.Address) return System.Address;
 223
 224    type pthread_t           is private;
 225    subtype Thread_Id        is pthread_t;
 226
 227    type pthread_mutex_t     is limited private;
 228    type pthread_cond_t      is limited private;
 229    type pthread_attr_t      is limited private;
 230    type pthread_mutexattr_t is limited private;
 231    type pthread_condattr_t  is limited private;
 232    type pthread_key_t       is private;
 233
 234    PTHREAD_CREATE_DETACHED : constant := 0;
 235
 236    -----------
 237    -- Stack --
 238    -----------
 239
 240    Stack_Base_Available : constant Boolean := False;
 241    --  Indicates wether the stack base is available on this target.
 242    --  This allows us to share s-osinte.adb between all the FSU/RTEMS
 243    --  run time.
 244    --  Note that this value can only be true if pthread_t has a complete
 245    --  definition that corresponds exactly to the C header files.
 246
 247    function Get_Stack_Base (thread : pthread_t) return Address;
 248    pragma Inline (Get_Stack_Base);
 249    --  returns the stack base of the specified thread.
 250    --  Only call this function when Stack_Base_Available is True.
 251
 252    --  These two functions are only needed to share s-taprop.adb with
 253    --  FSU threads.
 254
 255    function Get_Page_Size return size_t;
 256    function Get_Page_Size return Address;
 257    --  returns the size of a page, or 0 if this is not relevant on this
 258    --  target (which is the case for RTEMS)
 259
 260    PROT_ON  : constant := 0;
 261    PROT_OFF : constant := 0;
 262
 263    function mprotect (addr : Address; len : size_t; prot : int) return int;
 264    --  Do nothing on RTEMS.
 265
 266    -----------------------------------------
 267    --  Nonstandard Thread Initialization  --
 268    -----------------------------------------
 269
 270    procedure pthread_init;
 271    --  FSU_THREADS requires pthread_init, which is nonstandard
 272    --  and this should be invoked during the elaboration of s-taprop.adb
 273    --
 274    --  RTEMS does not require this so we provide an empty Ada body.
 275
 276    -------------------------
 277    -- POSIX.1c  Section 3 --
 278    -------------------------
 279
 280    function sigwait
 281      (set : access sigset_t;
 282       sig : access Signal) return int;
 283    pragma Import (C, sigwait, "sigwait");
 284
 285    function pthread_kill
 286      (thread : pthread_t;
 287       sig    : Signal) return int;
 288    pragma Import (C, pthread_kill, "pthread_kill");
 289
 290    type sigset_t_ptr is access all sigset_t;
 291
 292    function pthread_sigmask
 293      (how  : int;
 294       set  : sigset_t_ptr;
 295       oset : sigset_t_ptr) return int;
 296    pragma Import (C, pthread_sigmask, "pthread_sigmask");
 297
 298    ----------------------------
 299    --  POSIX.1c  Section 11  --
 300    ----------------------------
 301
 302    function pthread_mutexattr_init
 303      (attr : access pthread_mutexattr_t) return int;
 304    pragma Import (C, pthread_mutexattr_init, "pthread_mutexattr_init");
 305
 306    function pthread_mutexattr_destroy
 307      (attr : access pthread_mutexattr_t) return int;
 308    pragma Import (C, pthread_mutexattr_destroy, "pthread_mutexattr_destroy");
 309
 310    function pthread_mutex_init
 311      (mutex : access pthread_mutex_t;
 312       attr  : access pthread_mutexattr_t) return int;
 313    pragma Import (C, pthread_mutex_init, "pthread_mutex_init");
 314
 315    function pthread_mutex_destroy (mutex : access pthread_mutex_t) return int;
 316    pragma Import (C, pthread_mutex_destroy, "pthread_mutex_destroy");
 317
 318    function pthread_mutex_lock (mutex : access pthread_mutex_t) return int;
 319    pragma Import (C, pthread_mutex_lock, "pthread_mutex_lock");
 320
 321    function pthread_mutex_unlock (mutex : access pthread_mutex_t) return int;
 322    pragma Import (C, pthread_mutex_unlock, "pthread_mutex_unlock");
 323
 324    function pthread_condattr_init
 325      (attr : access pthread_condattr_t) return int;
 326    pragma Import (C, pthread_condattr_init, "pthread_condattr_init");
 327
 328    function pthread_condattr_destroy
 329      (attr : access pthread_condattr_t) return int;
 330    pragma Import (C, pthread_condattr_destroy, "pthread_condattr_destroy");
 331
 332    function pthread_cond_init
 333      (cond : access pthread_cond_t;
 334       attr : access pthread_condattr_t) return int;
 335    pragma Import (C, pthread_cond_init, "pthread_cond_init");
 336
 337    function pthread_cond_destroy (cond : access pthread_cond_t) return int;
 338    pragma Import (C, pthread_cond_destroy, "pthread_cond_destroy");
 339
 340    function pthread_cond_signal (cond : access pthread_cond_t) return int;
 341    pragma Import (C, pthread_cond_signal, "pthread_cond_signal");
 342
 343    function pthread_cond_wait
 344      (cond  : access pthread_cond_t;
 345       mutex : access pthread_mutex_t) return int;
 346    pragma Import (C, pthread_cond_wait, "pthread_cond_wait");
 347
 348    function pthread_cond_timedwait
 349      (cond    : access pthread_cond_t;
 350       mutex   : access pthread_mutex_t;
 351       abstime : access timespec) return int;
 352    pragma Import (C, pthread_cond_timedwait, "pthread_cond_timedwait");
 353
 354    Relative_Timed_Wait : constant Boolean := False;
 355    --  pthread_cond_timedwait requires an absolute delay time
 356
 357    --------------------------
 358    -- POSIX.1c  Section 13 --
 359    --------------------------
 360
 361    PTHREAD_PRIO_NONE    : constant := 0;
 362    PTHREAD_PRIO_PROTECT : constant := 2;
 363    PTHREAD_PRIO_INHERIT : constant := 1;
 364
 365    function pthread_mutexattr_setprotocol
 366      (attr     : access pthread_mutexattr_t;
 367       protocol : int) return int;
 368    pragma Import (C, pthread_mutexattr_setprotocol);
 369
 370    function pthread_mutexattr_setprioceiling
 371      (attr     : access pthread_mutexattr_t;
 372       prioceiling : int) return int;
 373    pragma Import
 374      (C, pthread_mutexattr_setprioceiling,
 375       "pthread_mutexattr_setprioceiling");
 376
 377    type struct_sched_param is record
 378       sched_priority      : int;
 379       ss_low_priority     : timespec;
 380       ss_replenish_period : timespec;
 381       ss_initial_budget   : timespec;
 382    end record;
 383    pragma Convention (C, struct_sched_param);
 384
 385    function pthread_setschedparam
 386      (thread : pthread_t;
 387       policy : int;
 388       param  : access struct_sched_param) return int;
 389    pragma Import (C, pthread_setschedparam, "pthread_setschedparam");
 390
 391    function pthread_attr_setscope
 392      (attr            : access pthread_attr_t;
 393       contentionscope : int) return int;
 394    pragma Import (C, pthread_attr_setscope, "pthread_attr_setscope");
 395
 396    function pthread_attr_setinheritsched
 397      (attr         : access pthread_attr_t;
 398       inheritsched : int) return int;
 399    pragma Import (C, pthread_attr_setinheritsched);
 400
 401    function pthread_attr_setschedpolicy
 402      (attr   : access pthread_attr_t;
 403       policy : int) return int;
 404    pragma Import (C, pthread_attr_setschedpolicy);
 405
 406    function pthread_attr_setschedparam
 407      (attr        : access pthread_attr_t;
 408       sched_param : int) return int;
 409    pragma Import (C, pthread_attr_setschedparam);
 410
 411    function sched_yield return int;
 412    pragma Import (C, sched_yield, "sched_yield");
 413
 414    ---------------------------
 415    -- P1003.1c - Section 16 --
 416    ---------------------------
 417
 418    function pthread_attr_init (attributes : access pthread_attr_t) return int;
 419    pragma Import (C, pthread_attr_init, "pthread_attr_init");
 420
 421    function pthread_attr_destroy
 422      (attributes : access pthread_attr_t) return int;
 423    pragma Import (C, pthread_attr_destroy, "pthread_attr_destroy");
 424
 425    function pthread_attr_setdetachstate
 426      (attr        : access pthread_attr_t;
 427       detachstate : int) return int;
 428    pragma Import (C, pthread_attr_setdetachstate);
 429
 430    function pthread_attr_setstacksize
 431      (attr      : access pthread_attr_t;
 432       stacksize : size_t) return int;
 433    pragma Import (C, pthread_attr_setstacksize, "pthread_attr_setstacksize");
 434
 435    function pthread_create
 436      (thread        : access pthread_t;
 437       attributes    : access pthread_attr_t;
 438       start_routine : Thread_Body;
 439       arg           : System.Address) return int;
 440    pragma Import (C, pthread_create, "pthread_create");
 441
 442    procedure pthread_exit (status : System.Address);
 443    pragma Import (C, pthread_exit, "pthread_exit");
 444
 445    function pthread_self return pthread_t;
 446    pragma Import (C, pthread_self, "pthread_self");
 447
 448    --------------------------
 449    -- POSIX.1c  Section 17 --
 450    --------------------------
 451
 452    function pthread_setspecific
 453      (key   : pthread_key_t;
 454       value : System.Address) return int;
 455    pragma Import (C, pthread_setspecific, "pthread_setspecific");
 456
 457    function pthread_getspecific (key : pthread_key_t) return System.Address;
 458    pragma Import (C, pthread_getspecific, "pthread_getspecific");
 459
 460    type destructor_pointer is access procedure (arg : System.Address);
 461
 462    function pthread_key_create
 463      (key        : access pthread_key_t;
 464       destructor : destructor_pointer) return int;
 465    pragma Import (C, pthread_key_create, "pthread_key_create");
 466
 467 private
 468
 469    type sigset_t is new int;
 470
 471    type pid_t is new int;
 472
 473    type time_t is new long;
 474
 475    type timespec is record
 476       tv_sec  : time_t;
 477       tv_nsec : long;
 478    end record;
 479    pragma Convention (C, timespec);
 480
 481    type clockid_t is new rtems_id;
 482    CLOCK_REALTIME : constant clockid_t := 1;
 483
 484    type struct_timeval is record
 485       tv_sec  : int;
 486       tv_usec : int;
 487    end record;
 488    pragma Convention (C, struct_timeval);
 489
 490    type pthread_attr_t is record
 491       is_initialized  : int;
 492       stackaddr       : System.Address;
 493       stacksize       : int;
 494       contentionscope : int;
 495       inheritsched    : int;
 496       schedpolicy     : int;
 497       schedparam      : struct_sched_param;
 498       cputime_clocked_allowed : int;
 499       deatchstate     : int;
 500    end record;
 501    pragma Convention (C, pthread_attr_t);
 502
 503    type pthread_condattr_t is record
 504       flags        : int;
 505    end record;
 506    pragma Convention (C, pthread_condattr_t);
 507
 508    type pthread_mutexattr_t is record
 509       is_initialized  : int;
 510       process_shared  : int;
 511       prio_ceiling    : int;
 512       protocol        : int;
 513       recursive       : int;
 514    end record;
 515    pragma Convention (C, pthread_mutexattr_t);
 516
 517    type pthread_t is new rtems_id;
 518
 519    type pthread_mutex_t is new rtems_id;
 520
 521    type pthread_cond_t is new rtems_id;
 522
 523    type pthread_key_t is new rtems_id;
 524
 525 end System.OS_Interface;