gcc/ada/54osinte.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) 2000-2001 Ada Core Technologies, 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 Solaris (POSIX 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 ("-lposix4");
  50    pragma Linker_Options ("-lpthread");
  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 := 145;
  74
  75    -------------
  76    -- Signals --
  77    -------------
  78
  79    Max_Interrupt : constant := 45;
  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 := 7; --  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 := 19; --  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 := 22; --  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    SIGWAITING  : constant := 32; --  process's lwps blocked (Solaris)
 118    SIGLWP      : constant := 33; --  used by thread library (Solaris)
 119    SIGFREEZE   : constant := 34; --  used by CPR (Solaris)
 120    SIGTHAW     : constant := 35; --  used by CPR (Solaris)
 121    SIGCANCEL   : constant := 36; --  thread cancellation signal (libthread)
 122
 123    SIGADAABORT : constant := SIGABRT;
 124
 125    type Signal_Set is array (Natural range <>) of Signal;
 126
 127    Unmasked    : constant Signal_Set := (SIGTRAP, SIGLWP, SIGPROF);
 128
 129    --  Following signals should not be disturbed.
 130    --  See c-posix-signals.c in FLORIST
 131
 132    Reserved    : constant Signal_Set :=
 133      (SIGKILL, SIGSTOP, SIGWAITING, SIGCANCEL);
 134
 135    type sigset_t is private;
 136
 137    function sigaddset (set : access sigset_t; sig : Signal) return int;
 138    pragma Import (C, sigaddset, "sigaddset");
 139
 140    function sigdelset (set : access sigset_t; sig : Signal) return int;
 141    pragma Import (C, sigdelset, "sigdelset");
 142
 143    function sigfillset (set : access sigset_t) return int;
 144    pragma Import (C, sigfillset, "sigfillset");
 145
 146    function sigismember (set : access sigset_t; sig : Signal) return int;
 147    pragma Import (C, sigismember, "sigismember");
 148
 149    function sigemptyset (set : access sigset_t) return int;
 150    pragma Import (C, sigemptyset, "sigemptyset");
 151
 152    type struct_sigaction is record
 153       sa_flags   : int;
 154       sa_handler : System.Address;
 155       sa_mask    : sigset_t;
 156       sa_resv1   : int;
 157       sa_resv2   : int;
 158    end record;
 159    pragma Convention (C, struct_sigaction);
 160    type struct_sigaction_ptr is access all struct_sigaction;
 161
 162    SIG_BLOCK   : constant := 1;
 163    SIG_UNBLOCK : constant := 2;
 164    SIG_SETMASK : constant := 3;
 165
 166    SIG_DFL : constant := 0;
 167    SIG_IGN : constant := 1;
 168
 169    function sigaction
 170      (sig  : Signal;
 171       act  : struct_sigaction_ptr;
 172       oact : struct_sigaction_ptr) return int;
 173    pragma Import (C, sigaction, "sigaction");
 174
 175    ----------
 176    -- Time --
 177    ----------
 178
 179    Time_Slice_Supported : constant Boolean := True;
 180    --  Indicates wether time slicing is supported
 181
 182    type timespec is private;
 183
 184    type clockid_t is private;
 185
 186    CLOCK_REALTIME : constant clockid_t;
 187
 188    function clock_gettime
 189      (clock_id : clockid_t;
 190       tp       : access timespec) return int;
 191    pragma Import (C, clock_gettime, "clock_gettime");
 192
 193    function To_Duration (TS : timespec) return Duration;
 194    pragma Inline (To_Duration);
 195
 196    function To_Timespec (D : Duration) return timespec;
 197    pragma Inline (To_Timespec);
 198
 199    type struct_timeval is private;
 200
 201    function To_Duration (TV : struct_timeval) return Duration;
 202    pragma Inline (To_Duration);
 203
 204    function To_Timeval (D : Duration) return struct_timeval;
 205    pragma Inline (To_Timeval);
 206
 207    -------------------------
 208    -- Priority Scheduling --
 209    -------------------------
 210
 211    SCHED_FIFO  : constant := 1;
 212    SCHED_RR    : constant := 2;
 213    SCHED_OTHER : constant := 0;
 214
 215    -------------
 216    -- Process --
 217    -------------
 218
 219    type pid_t is private;
 220
 221    function kill (pid : pid_t; sig : Signal) return int;
 222    pragma Import (C, kill, "kill");
 223
 224    function getpid return pid_t;
 225    pragma Import (C, getpid, "getpid");
 226
 227    ---------
 228    -- LWP --
 229    ---------
 230
 231    function lwp_self return System.Address;
 232    pragma Import (C, lwp_self, "_lwp_self");
 233
 234    -------------
 235    -- Threads --
 236    -------------
 237
 238    type Thread_Body is access
 239      function (arg : System.Address) return System.Address;
 240    type pthread_t           is private;
 241    subtype Thread_Id        is pthread_t;
 242
 243    type pthread_mutex_t     is limited private;
 244    type pthread_cond_t      is limited private;
 245    type pthread_attr_t      is limited private;
 246    type pthread_mutexattr_t is limited private;
 247    type pthread_condattr_t  is limited private;
 248    type pthread_key_t       is private;
 249
 250    PTHREAD_CREATE_DETACHED : constant := 16#40#;
 251
 252    -----------
 253    -- Stack --
 254    -----------
 255
 256    Stack_Base_Available : constant Boolean := False;
 257    --  Indicates wether the stack base is available on this target.
 258
 259    function Get_Stack_Base (thread : pthread_t) return Address;
 260    pragma Inline (Get_Stack_Base);
 261    --  returns the stack base of the specified thread.
 262    --  Only call this function when Stack_Base_Available is True.
 263
 264    function Get_Page_Size return size_t;
 265    function Get_Page_Size return Address;
 266    pragma Import (C, Get_Page_Size, "getpagesize");
 267    --  returns the size of a page, or 0 if this is not relevant on this
 268    --  target
 269
 270    PROT_NONE  : constant := 0;
 271    PROT_READ  : constant := 1;
 272    PROT_WRITE : constant := 2;
 273    PROT_EXEC  : constant := 4;
 274    PROT_ALL   : constant := PROT_READ + PROT_WRITE + PROT_EXEC;
 275
 276    PROT_ON    : constant := PROT_READ;
 277    PROT_OFF   : constant := PROT_ALL;
 278
 279    function mprotect (addr : Address; len : size_t; prot : int) return int;
 280    pragma Import (C, mprotect);
 281
 282    ---------------------------------------
 283    -- Nonstandard Thread Initialization --
 284    ---------------------------------------
 285
 286    procedure pthread_init;
 287    --  This is a dummy procedure to share some GNULLI files
 288
 289    -------------------------
 290    -- POSIX.1c  Section 3 --
 291    -------------------------
 292
 293    function sigwait
 294      (set : access sigset_t;
 295       sig : access Signal) return int;
 296    pragma Import (C, sigwait, "sigwait");
 297
 298    function pthread_kill
 299      (thread : pthread_t;
 300       sig    : Signal) return int;
 301    pragma Import (C, pthread_kill, "pthread_kill");
 302
 303    type sigset_t_ptr is access all sigset_t;
 304
 305    function pthread_sigmask
 306      (how  : int;
 307       set  : sigset_t_ptr;
 308       oset : sigset_t_ptr) return int;
 309    pragma Import (C, pthread_sigmask, "pthread_sigmask");
 310
 311    --------------------------
 312    -- POSIX.1c  Section 11 --
 313    --------------------------
 314
 315    function pthread_mutexattr_init
 316      (attr : access pthread_mutexattr_t) return int;
 317    pragma Import (C, pthread_mutexattr_init, "pthread_mutexattr_init");
 318
 319    function pthread_mutexattr_destroy
 320      (attr : access pthread_mutexattr_t) return int;
 321    pragma Import (C, pthread_mutexattr_destroy, "pthread_mutexattr_destroy");
 322
 323    function pthread_mutex_init
 324      (mutex : access pthread_mutex_t;
 325       attr  : access pthread_mutexattr_t) return int;
 326    pragma Import (C, pthread_mutex_init, "pthread_mutex_init");
 327
 328    function pthread_mutex_destroy (mutex : access pthread_mutex_t) return int;
 329    pragma Import (C, pthread_mutex_destroy, "pthread_mutex_destroy");
 330
 331    function pthread_mutex_lock (mutex : access pthread_mutex_t) return int;
 332    pragma Import (C, pthread_mutex_lock, "pthread_mutex_lock");
 333
 334    function pthread_mutex_unlock (mutex : access pthread_mutex_t) return int;
 335    pragma Import (C, pthread_mutex_unlock, "pthread_mutex_unlock");
 336
 337    function pthread_condattr_init
 338      (attr : access pthread_condattr_t) return int;
 339    pragma Import (C, pthread_condattr_init, "pthread_condattr_init");
 340
 341    function pthread_condattr_destroy
 342      (attr : access pthread_condattr_t) return int;
 343    pragma Import (C, pthread_condattr_destroy, "pthread_condattr_destroy");
 344
 345    function pthread_cond_init
 346      (cond : access pthread_cond_t;
 347       attr : access pthread_condattr_t) return int;
 348    pragma Import (C, pthread_cond_init, "pthread_cond_init");
 349
 350    function pthread_cond_destroy (cond : access pthread_cond_t) return int;
 351    pragma Import (C, pthread_cond_destroy, "pthread_cond_destroy");
 352
 353    function pthread_cond_signal (cond : access pthread_cond_t) return int;
 354    pragma Import (C, pthread_cond_signal, "pthread_cond_signal");
 355
 356    function pthread_cond_wait
 357      (cond  : access pthread_cond_t;
 358       mutex : access pthread_mutex_t) return int;
 359    pragma Import (C, pthread_cond_wait, "pthread_cond_wait");
 360
 361    function pthread_cond_timedwait
 362      (cond    : access pthread_cond_t;
 363       mutex   : access pthread_mutex_t;
 364       abstime : access timespec) return int;
 365    pragma Import (C, pthread_cond_timedwait, "pthread_cond_timedwait");
 366
 367    Relative_Timed_Wait : constant Boolean := False;
 368    --  pthread_cond_timedwait requires an absolute delay time
 369
 370    --------------------------
 371    -- POSIX.1c  Section 13 --
 372    --------------------------
 373
 374    PTHREAD_PRIO_NONE    : constant := 0;
 375    PTHREAD_PRIO_INHERIT : constant := 16#10#;
 376    PTHREAD_PRIO_PROTECT : constant := 16#20#;
 377
 378    function pthread_mutexattr_setprotocol
 379      (attr     : access pthread_mutexattr_t;
 380       protocol : int) return int;
 381    pragma Import (C, pthread_mutexattr_setprotocol);
 382
 383    function pthread_mutexattr_setprioceiling
 384      (attr        : access pthread_mutexattr_t;
 385       prioceiling : int) return int;
 386    pragma Import (C, pthread_mutexattr_setprioceiling);
 387
 388    type Array_8_Int is array (0 .. 7) of int;
 389    type struct_sched_param is record
 390       sched_priority : int;
 391       sched_pad      : Array_8_Int;
 392    end record;
 393
 394    function pthread_setschedparam
 395      (thread : pthread_t;
 396       policy : int;
 397       param  : access struct_sched_param) return int;
 398    pragma Import (C, pthread_setschedparam, "pthread_setschedparam");
 399
 400    function pthread_attr_setscope
 401      (attr            : access pthread_attr_t;
 402       contentionscope : int) return int;
 403    pragma Import (C, pthread_attr_setscope, "pthread_attr_setscope");
 404
 405    function pthread_attr_setinheritsched
 406      (attr         : access pthread_attr_t;
 407       inheritsched : int) return int;
 408    pragma Import (C, pthread_attr_setinheritsched);
 409
 410    function pthread_attr_setschedpolicy
 411      (attr   : access pthread_attr_t;
 412       policy : int) return int;
 413    pragma Import (C, pthread_attr_setschedpolicy);
 414
 415    function sched_yield return int;
 416    pragma Import (C, sched_yield, "sched_yield");
 417
 418    ---------------------------
 419    -- P1003.1c - Section 16 --
 420    ---------------------------
 421
 422    function pthread_attr_init (attributes : access pthread_attr_t) return int;
 423    pragma Import (C, pthread_attr_init, "pthread_attr_init");
 424
 425    function pthread_attr_destroy
 426      (attributes : access pthread_attr_t) return int;
 427    pragma Import (C, pthread_attr_destroy, "pthread_attr_destroy");
 428
 429    function pthread_attr_setdetachstate
 430      (attr        : access pthread_attr_t;
 431       detachstate : int) return int;
 432    pragma Import (C, pthread_attr_setdetachstate);
 433
 434    function pthread_attr_setstacksize
 435      (attr      : access pthread_attr_t;
 436       stacksize : size_t) return int;
 437    pragma Import (C, pthread_attr_setstacksize);
 438
 439    function pthread_create
 440      (thread        : access pthread_t;
 441       attributes    : access pthread_attr_t;
 442       start_routine : Thread_Body;
 443       arg           : System.Address) return int;
 444    pragma Import (C, pthread_create, "pthread_create");
 445
 446    procedure pthread_exit (status : System.Address);
 447    pragma Import (C, pthread_exit, "pthread_exit");
 448
 449    function pthread_self return pthread_t;
 450    pragma Import (C, pthread_self, "pthread_self");
 451
 452    --------------------------
 453    -- POSIX.1c  Section 17 --
 454    --------------------------
 455
 456    function pthread_setspecific
 457      (key   : pthread_key_t;
 458       value : System.Address) return int;
 459    pragma Import (C, pthread_setspecific, "pthread_setspecific");
 460
 461    function pthread_getspecific (key : pthread_key_t) return System.Address;
 462    pragma Import (C, pthread_getspecific, "pthread_getspecific");
 463
 464    type destructor_pointer is access procedure (arg : System.Address);
 465
 466    function pthread_key_create
 467      (key        : access pthread_key_t;
 468       destructor : destructor_pointer) return int;
 469    pragma Import (C, pthread_key_create, "pthread_key_create");
 470
 471 private
 472
 473    type array_type_1 is array (Integer range 0 .. 3) of unsigned_long;
 474    type sigset_t is record
 475       X_X_sigbits  : array_type_1;
 476    end record;
 477    pragma Convention (C, sigset_t);
 478
 479    type pid_t is new long;
 480
 481    type time_t is new long;
 482
 483    type timespec is record
 484       tv_sec  : time_t;
 485       tv_nsec : long;
 486    end record;
 487    pragma Convention (C, timespec);
 488
 489    type clockid_t is new int;
 490    CLOCK_REALTIME : constant clockid_t := 0;
 491
 492    type struct_timeval is record
 493       tv_sec  : time_t;
 494       tv_usec : time_t;
 495    end record;
 496    pragma Convention (C, struct_timeval);
 497
 498    type pthread_attr_t is record
 499       pthread_attrp : System.Address;
 500    end record;
 501    pragma Convention (C, pthread_attr_t);
 502
 503    type pthread_condattr_t is record
 504       pthread_condattrp : System.Address;
 505    end record;
 506    pragma Convention (C, pthread_condattr_t);
 507
 508    type pthread_mutexattr_t is record
 509       pthread_mutexattrp : System.Address;
 510    end record;
 511    pragma Convention (C, pthread_mutexattr_t);
 512
 513    type pthread_t is new unsigned;
 514
 515    type uint64_t is mod 2 ** 64;
 516
 517    type pthread_mutex_t is record
 518       pthread_mutex_flags   : uint64_t;
 519       pthread_mutex_owner64 : uint64_t;
 520       pthread_mutex_data    : uint64_t;
 521    end record;
 522    pragma Convention (C, pthread_mutex_t);
 523    type pthread_mutex_t_ptr is access pthread_mutex_t;
 524
 525    type pthread_cond_t is record
 526       pthread_cond_flags : uint64_t;
 527       pthread_cond_data  : uint64_t;
 528    end record;
 529    pragma Convention (C, pthread_cond_t);
 530
 531    type pthread_key_t is new unsigned;
 532
 533 end System.OS_Interface;