gcc/ada/s-osinte-lynxos-3.ads

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                          GNAT RUN-TIME 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) 1991-1994, Florida State University            --
  10 --          Copyright (C) 1995-2011, Free Software Foundation, Inc.         --
  11 --                                                                          --
  12 -- GNAT 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 3,  or (at your option) any later ver- --
  15 -- sion.  GNAT 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.                                     --
  18 --                                                                          --
  19 -- As a special exception under Section 7 of GPL version 3, you are granted --
  20 -- additional permissions described in the GCC Runtime Library Exception,   --
  21 -- version 3.1, as published by the Free Software Foundation.               --
  22 --                                                                          --
  23 -- You should have received a copy of the GNU General Public License and    --
  24 -- a copy of the GCC Runtime Library Exception along with this program;     --
  25 -- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
  26 -- <http://www.gnu.org/licenses/>.                                          --
  27 --                                                                          --
  28 -- GNAT was originally developed  by the GNAT team at  New York University. --
  29 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  30 --                                                                          --
  31 ------------------------------------------------------------------------------
  32
  33 --  This is a LynxOS (Native) version of this package
  34
  35 --  This package encapsulates all direct interfaces to OS services
  36 --  that are needed by the tasking run-time (libgnarl).
  37
  38 --  PLEASE DO NOT add any with-clauses to this package or remove the pragma
  39 --  Preelaborate. This package is designed to be a bottom-level (leaf) package.
  40
  41 with Ada.Unchecked_Conversion;
  42
  43 with Interfaces.C;
  44
  45 package System.OS_Interface is
  46    pragma Preelaborate;
  47
  48    pragma Linker_Options ("-mthreads");
  49
  50    subtype int            is Interfaces.C.int;
  51    subtype char           is Interfaces.C.char;
  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 := 60;
  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    SIGBRK      : constant := 6; --  break
  88    SIGIOT      : constant := 6; --  IOT instruction
  89    SIGABRT     : constant := 6; --  used by abort, replace SIGIOT in the future
  90    SIGCORE     : constant := 7; --  kill with core dump
  91    SIGEMT      : constant := 7; --  EMT instruction
  92    SIGFPE      : constant := 8; --  floating point exception
  93    SIGKILL     : constant := 9; --  kill (cannot be caught or ignored)
  94    SIGBUS      : constant := 10; --  bus error
  95    SIGSEGV     : constant := 11; --  segmentation violation
  96    SIGSYS      : constant := 12; --  bad argument to system call
  97    SIGPIPE     : constant := 13; --  write on a pipe with no one to read it
  98    SIGALRM     : constant := 14; --  alarm clock
  99    SIGTERM     : constant := 15; --  software termination signal from kill
 100    SIGURG      : constant := 16; --  urgent condition on IO channel
 101    SIGSTOP     : constant := 17; --  stop (cannot be caught or ignored)
 102    SIGTSTP     : constant := 18; --  user stop requested from tty
 103    SIGCONT     : constant := 19; --  stopped process has been continued
 104    SIGCLD      : constant := 20; --  alias for SIGCHLD
 105    SIGCHLD     : constant := 20; --  child status change
 106    SIGTTIN     : constant := 21; --  background tty read attempted
 107    SIGTTOU     : constant := 22; --  background tty write attempted
 108    SIGIO       : constant := 23; --  I/O possible (Solaris SIGPOLL alias)
 109    SIGPOLL     : constant := 23; --  pollable event occurred
 110    SIGXCPU     : constant := 24; --  CPU time limit exceeded
 111    SIGXFSZ     : constant := 25; --  filesize limit exceeded
 112    SIGVTALRM   : constant := 26; --  virtual timer expired
 113    SIGPROF     : constant := 27; --  profiling timer expired
 114    SIGWINCH    : constant := 28; --  window size change
 115    SIGLOST     : constant := 29; --  SUN 4.1 compatibility
 116    SIGUSR1     : constant := 30; --  user defined signal 1
 117    SIGUSR2     : constant := 31; --  user defined signal 2
 118    SIGPRIO     : constant := 32; --  sent to a process with its priority or
 119                                  --  group is changed
 120
 121    SIGADAABORT : constant := SIGABRT;
 122    --  Change this if you want to use another signal for task abort.
 123    --  SIGTERM might be a good one.
 124
 125    type Signal_Set is array (Natural range <>) of Signal;
 126
 127    Unmasked    : constant Signal_Set :=
 128      (SIGTRAP, SIGTTIN, SIGTTOU, SIGTSTP, SIGPROF);
 129    Reserved    : constant Signal_Set := (SIGABRT, SIGKILL, SIGSTOP, SIGPRIO);
 130
 131    type sigset_t is private;
 132
 133    function sigaddset (set : access sigset_t; sig : Signal) return int;
 134    pragma Import (C, sigaddset, "sigaddset");
 135
 136    function sigdelset (set : access sigset_t; sig : Signal) return int;
 137    pragma Import (C, sigdelset, "sigdelset");
 138
 139    function sigfillset (set : access sigset_t) return int;
 140    pragma Import (C, sigfillset, "sigfillset");
 141
 142    function sigismember (set : access sigset_t; sig : Signal) return int;
 143    pragma Import (C, sigismember, "sigismember");
 144
 145    function sigemptyset (set : access sigset_t) return int;
 146    pragma Import (C, sigemptyset, "sigemptyset");
 147
 148    type struct_sigaction is record
 149       sa_handler : System.Address;
 150       sa_mask    : sigset_t;
 151       sa_flags   : int;
 152    end record;
 153    pragma Convention (C, struct_sigaction);
 154    type struct_sigaction_ptr is access all struct_sigaction;
 155
 156    SA_SIGINFO  : constant := 16#80#;
 157
 158    SIG_BLOCK   : constant := 0;
 159    SIG_UNBLOCK : constant := 1;
 160    SIG_SETMASK : constant := 2;
 161
 162    SIG_DFL : constant := 0;
 163    SIG_IGN : constant := 1;
 164
 165    function sigaction
 166      (sig  : Signal;
 167       act  : struct_sigaction_ptr;
 168       oact : struct_sigaction_ptr) return int;
 169    pragma Import (C, sigaction, "sigaction");
 170
 171    ----------
 172    -- Time --
 173    ----------
 174
 175    Time_Slice_Supported : constant Boolean := True;
 176    --  Indicates whether time slicing is supported
 177
 178    type timespec is private;
 179
 180    type clockid_t is new int;
 181
 182    function clock_gettime
 183      (clock_id : clockid_t;
 184       tp       : access timespec) return int;
 185    pragma Inline (clock_gettime);
 186    --  LynxOS has non standard 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_timezone is record
 195       tz_minuteswest : int;
 196       tz_dsttime     : int;
 197    end record;
 198    pragma Convention (C, struct_timezone);
 199    type struct_timezone_ptr is access all struct_timezone;
 200
 201    -------------------------
 202    -- Priority Scheduling --
 203    -------------------------
 204
 205    SCHED_FIFO  : constant := 16#00200000#;
 206    SCHED_RR    : constant := 16#00100000#;
 207    SCHED_OTHER : constant := 16#00400000#;
 208
 209    function To_Target_Priority
 210      (Prio : System.Any_Priority) return Interfaces.C.int;
 211    --  Maps System.Any_Priority to a POSIX priority
 212
 213    -------------
 214    -- Process --
 215    -------------
 216
 217    type pid_t is private;
 218
 219    function kill (pid : pid_t; sig : Signal) return int;
 220    pragma Import (C, kill, "kill");
 221
 222    function getpid return pid_t;
 223    pragma Import (C, getpid, "getpid");
 224
 225    ---------
 226    -- LWP --
 227    ---------
 228
 229    function lwp_self return System.Address;
 230    --  lwp_self does not exist on this thread library, revert to pthread_self
 231    --  which is the closest approximation (with getpid). This function is
 232    --  needed to share 7staprop.adb across POSIX-like targets.
 233    pragma Import (C, lwp_self, "pthread_self");
 234
 235    -------------
 236    -- Threads --
 237    -------------
 238
 239    type Thread_Body is access
 240      function (arg : System.Address) return System.Address;
 241    pragma Convention (C, Thread_Body);
 242
 243    function Thread_Body_Access is new
 244      Ada.Unchecked_Conversion (System.Address, Thread_Body);
 245
 246    type pthread_t           is private;
 247    subtype Thread_Id        is pthread_t;
 248
 249    type pthread_mutex_t     is limited private;
 250    type pthread_cond_t      is limited private;
 251    type st_t                is limited private;
 252    type pthread_attr_t      is limited private;
 253    type pthread_mutexattr_t is limited private;
 254    type pthread_condattr_t  is limited private;
 255    type pthread_key_t       is private;
 256
 257    PTHREAD_CREATE_DETACHED : constant := 0;
 258
 259    PTHREAD_SCOPE_PROCESS : constant := 0;
 260    PTHREAD_SCOPE_SYSTEM  : constant := 1;
 261
 262    -----------
 263    -- Stack --
 264    -----------
 265
 266    Alternate_Stack_Size : constant := 0;
 267    --  No alternate signal stack is used on this platform
 268
 269    Stack_Base_Available : constant Boolean := False;
 270    --  Indicates whether the stack base is available on this target
 271
 272    function Get_Stack_Base (thread : pthread_t) return Address;
 273    pragma Inline (Get_Stack_Base);
 274    --  returns the stack base of the specified thread.
 275    --  Only call this function when Stack_Base_Available is True.
 276
 277    function Get_Page_Size return size_t;
 278    function Get_Page_Size return Address;
 279    pragma Import (C, Get_Page_Size, "getpagesize");
 280    --  returns the size of a page, or 0 if this is not relevant on this
 281    --  target
 282
 283    PROT_NONE  : constant := 0;
 284    PROT_READ  : constant := 1;
 285    PROT_WRITE : constant := 2;
 286    PROT_EXEC  : constant := 4;
 287    PROT_USER  : constant := 8;
 288    PROT_ALL   : constant := PROT_READ + PROT_WRITE + PROT_EXEC + PROT_USER;
 289
 290    PROT_ON    : constant := PROT_READ;
 291    PROT_OFF   : constant := PROT_ALL;
 292
 293    function mprotect (addr : Address; len : size_t; prot : int) return int;
 294    pragma Import (C, mprotect);
 295
 296    -------------------------
 297    -- POSIX.1c  Section 3 --
 298    -------------------------
 299
 300    function sigwait
 301      (set : access sigset_t;
 302       sig : access Signal) return int;
 303    pragma Inline (sigwait);
 304    --  LynxOS has non standard sigwait
 305
 306    function pthread_kill (thread : pthread_t; sig : Signal) return int;
 307    pragma Import (C, pthread_kill, "pthread_kill");
 308
 309    function pthread_sigmask
 310      (how  : int;
 311       set  : access sigset_t;
 312       oset : access sigset_t) return int;
 313    pragma Import (C, pthread_sigmask, "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 Inline (pthread_mutexattr_init);
 322    --  LynxOS has a nonstandard pthread_mutexattr_init
 323
 324    function pthread_mutexattr_destroy
 325      (attr : access pthread_mutexattr_t) return int;
 326    pragma Inline (pthread_mutexattr_destroy);
 327    --  Lynxos has a nonstandard pthread_mutexattr_destroy
 328
 329    function pthread_mutex_init
 330      (mutex : access pthread_mutex_t;
 331       attr  : access pthread_mutexattr_t) return int;
 332    pragma Inline (pthread_mutex_init);
 333    --  LynxOS has a nonstandard pthread_mutex_init
 334
 335    function pthread_mutex_destroy (mutex : access pthread_mutex_t) return int;
 336    pragma Inline (pthread_mutex_destroy);
 337    --  LynxOS has a nonstandard pthread_mutex_destroy
 338
 339    function pthread_mutex_lock (mutex : access pthread_mutex_t) return int;
 340    pragma Inline (pthread_mutex_lock);
 341    --  LynxOS has a nonstandard pthread_mutex_lock
 342
 343    function pthread_mutex_unlock (mutex : access pthread_mutex_t) return int;
 344    pragma Inline (pthread_mutex_unlock);
 345    --  LynxOS has a nonstandard pthread_mutex_unlock
 346
 347    function pthread_condattr_init
 348      (attr : access pthread_condattr_t) return int;
 349    pragma Inline (pthread_condattr_init);
 350    --  LynxOS has a nonstandard pthread_condattr_init
 351
 352    function pthread_condattr_destroy
 353      (attr : access pthread_condattr_t) return int;
 354    pragma Inline (pthread_condattr_destroy);
 355    --  LynxOS has a nonstandard pthread_condattr_destroy
 356
 357    function pthread_cond_init
 358      (cond : access pthread_cond_t;
 359       attr : access pthread_condattr_t) return int;
 360    pragma Inline (pthread_cond_init);
 361    --  LynxOS has a non standard pthread_cond_init
 362
 363    function pthread_cond_destroy (cond : access pthread_cond_t) return int;
 364    pragma Inline (pthread_cond_destroy);
 365    --  LynxOS has a nonstandard pthread_cond_destroy
 366
 367    function pthread_cond_signal (cond : access pthread_cond_t) return int;
 368    pragma Inline (pthread_cond_signal);
 369    --  LynxOS has a nonstandard pthread_cond_signal
 370
 371    function pthread_cond_wait
 372      (cond  : access pthread_cond_t;
 373       mutex : access pthread_mutex_t) return int;
 374    pragma Inline (pthread_cond_wait);
 375    --  LynxOS has a nonstandard pthread_cond_wait
 376
 377    function pthread_cond_timedwait
 378      (cond    : access pthread_cond_t;
 379       mutex   : access pthread_mutex_t;
 380       reltime : access timespec) return int;
 381    pragma Inline (pthread_cond_timedwait);
 382    --  LynxOS has a nonstandard pthread_cond_timedwait
 383
 384    Relative_Timed_Wait : constant Boolean := True;
 385    --  pthread_cond_timedwait requires a relative delay time
 386
 387    --------------------------
 388    -- POSIX.1c  Section 13 --
 389    --------------------------
 390
 391    PTHREAD_PRIO_NONE    : constant := 0;
 392    PTHREAD_PRIO_INHERIT : constant := 0;
 393    PTHREAD_PRIO_PROTECT : constant := 0;
 394
 395    type struct_sched_param is record
 396       sched_priority : int;  --  scheduling priority
 397    end record;
 398
 399    function pthread_setschedparam
 400      (thread : pthread_t;
 401       policy : int;
 402       param  : access struct_sched_param) return int;
 403    pragma Inline (pthread_setschedparam);
 404    --  LynxOS doesn't have pthread_setschedparam.
 405    --  Instead, use pthread_setscheduler
 406
 407    function pthread_mutexattr_setprotocol
 408      (attr     : access pthread_mutexattr_t;
 409       protocol : int) return int;
 410    pragma Inline (pthread_mutexattr_setprotocol);
 411    --  LynxOS doesn't have pthread_mutexattr_setprotocol
 412
 413    function pthread_mutexattr_setprioceiling
 414      (attr     : access pthread_mutexattr_t;
 415       prioceiling : int) return int;
 416    pragma Inline (pthread_mutexattr_setprioceiling);
 417    --  LynxOS doesn't have pthread_mutexattr_setprioceiling
 418
 419    function pthread_attr_setscope
 420      (attr            : access pthread_attr_t;
 421       contentionscope : int) return int;
 422    --  LynxOS doesn't have pthread_attr_setscope: all threads have system scope
 423    pragma Inline (pthread_attr_setscope);
 424
 425    function pthread_attr_setschedpolicy
 426      (attr   : access pthread_attr_t;
 427       policy : int) return int;
 428    pragma Import (C, pthread_attr_setschedpolicy, "pthread_attr_setsched");
 429
 430    function sched_yield return int;
 431    --   pragma Import (C, sched_yield, "sched_yield");
 432    pragma Inline (sched_yield);
 433
 434    ---------------------------
 435    -- P1003.1c - Section 16 --
 436    ---------------------------
 437
 438    function pthread_attr_init (attributes : access pthread_attr_t) return int;
 439    pragma Import (C, pthread_attr_init, "pthread_attr_create");
 440
 441    function pthread_attr_destroy
 442      (attributes : access pthread_attr_t) return int;
 443    pragma Import (C, pthread_attr_destroy, "pthread_attr_delete");
 444
 445    function pthread_attr_setdetachstate
 446      (attr        : access pthread_attr_t;
 447       detachstate : int) return int;
 448    pragma Inline (pthread_attr_setdetachstate);
 449    --  LynxOS doesn't have pthread_attr_setdetachstate
 450
 451    function pthread_attr_setstacksize
 452      (attr      : access pthread_attr_t;
 453       stacksize : size_t) return int;
 454    pragma Import (C, pthread_attr_setstacksize, "pthread_attr_setstacksize");
 455
 456    function pthread_create
 457      (thread        : access pthread_t;
 458       attributes    : access pthread_attr_t;
 459       start_routine : Thread_Body;
 460       arg           : System.Address) return int;
 461    pragma Inline (pthread_create);
 462    --  LynxOS has a non standard pthread_create
 463
 464    function pthread_detach (thread : pthread_t) return int;
 465    pragma Inline (pthread_detach);
 466
 467    procedure pthread_exit (status : System.Address);
 468    pragma Import (C, pthread_exit, "pthread_exit");
 469
 470    function pthread_self return pthread_t;
 471    pragma Import (C, pthread_self, "pthread_self");
 472
 473    --------------------------
 474    -- POSIX.1c  Section 17 --
 475    --------------------------
 476
 477    function pthread_setspecific
 478      (key   : pthread_key_t;
 479       value : System.Address) return int;
 480    pragma Inline (pthread_setspecific);
 481    --  LynxOS has a non standard pthread_setspecific
 482
 483    function pthread_getspecific (key : pthread_key_t) return System.Address;
 484    pragma Inline (pthread_getspecific);
 485    --  LynxOS has a non standard pthread_getspecific
 486
 487    type destructor_pointer is access procedure (arg : System.Address);
 488    pragma Convention (C, destructor_pointer);
 489
 490    function pthread_key_create
 491      (key        : access pthread_key_t;
 492       destructor : destructor_pointer) return int;
 493    pragma Inline (pthread_key_create);
 494    --  LynxOS has a non standard pthread_keycreate
 495
 496    procedure pthread_init;
 497    --  This is a dummy procedure to share some GNULLI files
 498
 499 private
 500
 501    type sigbit_array is array (1 .. 2) of long;
 502    type sigset_t is record
 503       sa_sigbits : sigbit_array;
 504    end record;
 505    pragma Convention (C_Pass_By_Copy, sigset_t);
 506
 507    type pid_t is new long;
 508
 509    type time_t is new long;
 510
 511    type timespec is record
 512       tv_sec  : time_t;
 513       tv_nsec : long;
 514    end record;
 515    pragma Convention (C, timespec);
 516
 517    type st_t is record
 518       stksize      : int;
 519       prio         : int;
 520       inheritsched : int;
 521       state        : int;
 522       sched        : int;
 523    end record;
 524    pragma Convention (C, st_t);
 525
 526    type pthread_attr_t is record
 527       st                 : st_t;
 528       pthread_attr_scope : int;  --  ignored
 529    end record;
 530    pragma Convention (C, pthread_attr_t);
 531
 532    type pthread_condattr_t is new int;
 533
 534    type pthread_mutexattr_t is new int;
 535
 536    type tid_t is new short;
 537    type pthread_t is new tid_t;
 538
 539    type synch_ptr is access all pthread_mutex_t;
 540    type pthread_mutex_t is record
 541       w_count   : int;
 542       mut_owner : int;
 543       id        : unsigned;
 544       next      : synch_ptr;
 545    end record;
 546    pragma Convention (C, pthread_mutex_t);
 547
 548    type pthread_cond_t is new pthread_mutex_t;
 549
 550    type pthread_key_t is new int;
 551
 552 end System.OS_Interface;