gcc/ada/s-osinte-interix.ads

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                 GNAT 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) 1991-1994, Florida State University            --
  10 --             Copyright (C) 1995-2005, 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,  51  Franklin  Street,  Fifth  Floor, --
  21 -- Boston, MA 02110-1301, 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.       --
  31 -- Extensive contributions were provided by Ada Core Technologies, Inc.     --
  32 --                                                                          --
  33 ------------------------------------------------------------------------------
  34
  35 --  This is a OpenNT/Interix (FSU THREADS) version of this package
  36
  37 --  This package encapsulates all direct interfaces to OS services
  38 --  that are needed by children of System.
  39
  40 --  PLEASE DO NOT add any with-clauses to this package or remove the pragma
  41 --  Preelaborate. This package is designed to be a bottom-level (leaf) package.
  42
  43 with Interfaces.C;
  44 with Unchecked_Conversion;
  45
  46 package System.OS_Interface is
  47    pragma Preelaborate;
  48
  49    pragma Linker_Options ("-lgthreads");
  50    pragma Linker_Options ("-lmalloc");
  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 := 60;
  74
  75    -------------
  76    -- Signals --
  77    -------------
  78
  79    Max_Interrupt : constant := 31;
  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 := 0; --  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 := 0; --  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 := 19; --  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
 118    SIGADAABORT : constant := SIGABRT;
 119
 120    type Signal_Set is array (Natural range <>) of Signal;
 121
 122    Unmasked    : constant Signal_Set :=
 123      (SIGTRAP, SIGALRM, SIGVTALRM, SIGTTIN, SIGTTOU, SIGTSTP, SIGPROF);
 124
 125    Reserved    : constant Signal_Set := (SIGKILL, SIGSTOP);
 126
 127    type sigset_t is private;
 128
 129    function sigaddset (set : access sigset_t; sig : Signal) return int;
 130    pragma Import (C, sigaddset, "sigaddset");
 131
 132    function sigdelset (set : access sigset_t; sig : Signal) return int;
 133    pragma Import (C, sigdelset, "sigdelset");
 134
 135    function sigfillset (set : access sigset_t) return int;
 136    pragma Import (C, sigfillset, "sigfillset");
 137
 138    function sigismember (set : access sigset_t; sig : Signal) return int;
 139    pragma Import (C, sigismember, "sigismember");
 140
 141    function sigemptyset (set : access sigset_t) return int;
 142    pragma Import (C, sigemptyset, "sigemptyset");
 143
 144    type struct_sigaction is record
 145       sa_handler  : System.Address;
 146       sa_mask     : sigset_t;
 147       sa_flags    : int;
 148       sa_restorer : System.Address;
 149    end record;
 150    pragma Convention (C, struct_sigaction);
 151    type struct_sigaction_ptr is access all struct_sigaction;
 152
 153    SIG_BLOCK   : constant := 1;
 154    SIG_UNBLOCK : constant := 2;
 155    SIG_SETMASK : constant := 3;
 156
 157    SIG_DFL : constant := 0;
 158    SIG_IGN : constant := 1;
 159
 160    SA_SIGINFO : constant := 0;
 161    --  Dummy constant for a sa_flags bit. A proper definition is needed only
 162    --  for the GCC/ZCX EH scheme (see System.Interrupt_Management).
 163
 164    function sigaction
 165      (sig  : Signal;
 166       act  : struct_sigaction_ptr;
 167       oact : struct_sigaction_ptr) return int;
 168    --  FSU pthreads redefines sigaction and then uses a special syscall
 169    --  API to call the system version. Doing syscalls on OpenNT is very
 170    --  difficult, so we rename the pthread version instead.
 171    pragma Import (C, sigaction, "pthread_wrapper_sigaction");
 172
 173    ----------
 174    -- Time --
 175    ----------
 176
 177    Time_Slice_Supported : constant Boolean := False;
 178    --  Indicates wether time slicing is supported (i.e FSU threads have been
 179    --  compiled with DEF_RR)
 180
 181    type timespec is private;
 182
 183    type clockid_t is private;
 184
 185    CLOCK_REALTIME : constant clockid_t;
 186
 187    function clock_gettime
 188      (clock_id : clockid_t;
 189       tp       : access timespec) return int;
 190    pragma Import (C, clock_gettime, "clock_gettime");
 191
 192    function To_Duration (TS : timespec) return Duration;
 193    pragma Inline (To_Duration);
 194
 195    function To_Timespec (D : Duration) return timespec;
 196    pragma Inline (To_Timespec);
 197
 198    type struct_timeval is private;
 199
 200    function To_Duration (TV : struct_timeval) return Duration;
 201    pragma Inline (To_Duration);
 202
 203    function To_Timeval (D : Duration) return struct_timeval;
 204    pragma Inline (To_Timeval);
 205
 206    -------------------------
 207    -- Priority Scheduling --
 208    -------------------------
 209
 210    SCHED_FIFO  : constant := 0;
 211    SCHED_RR    : constant := 1;
 212    SCHED_OTHER : constant := 2;
 213
 214    -------------
 215    -- Process --
 216    -------------
 217
 218    type pid_t is private;
 219
 220    function kill (pid : pid_t; sig : Signal) return int;
 221    pragma Import (C, kill, "kill");
 222
 223    function getpid return pid_t;
 224    pragma Import (C, getpid, "getpid");
 225
 226    ---------
 227    -- LWP --
 228    ---------
 229
 230    function lwp_self return System.Address;
 231    --  lwp_self does not exist on this thread library, revert to pthread_self
 232    --  which is the closest approximation (with getpid). This function is
 233    --  needed to share 7staprop.adb across POSIX-like targets.
 234    pragma Import (C, lwp_self, "pthread_self");
 235
 236    -------------
 237    -- Threads --
 238    -------------
 239
 240    type Thread_Body is access
 241      function (arg : System.Address) return System.Address;
 242
 243    function Thread_Body_Access is new
 244      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 pthread_attr_t      is limited private;
 252    type pthread_mutexattr_t is limited private;
 253    type pthread_condattr_t  is limited private;
 254    type pthread_key_t       is private;
 255
 256    PTHREAD_CREATE_DETACHED : constant := 1;
 257    PTHREAD_CREATE_JOINABLE : constant := 0;
 258
 259    -----------
 260    -- Stack --
 261    -----------
 262
 263    Stack_Base_Available : constant Boolean := False;
 264    --  Indicates wether the stack base is available on this target.
 265    --  This allows us to share s-osinte.adb between all the FSU run time.
 266    --  Note that this value can only be true if pthread_t has a complete
 267    --  definition that corresponds exactly to the C header files.
 268
 269    function Get_Stack_Base (thread : pthread_t) return Address;
 270    pragma Inline (Get_Stack_Base);
 271    --  returns the stack base of the specified thread.
 272    --  Only call this function when Stack_Base_Available is True.
 273
 274    function Get_Page_Size return size_t;
 275    function Get_Page_Size return Address;
 276    pragma Import (C, Get_Page_Size, "getpagesize");
 277    --  returns the size of a page, or 0 if this is not relevant on this
 278    --  target
 279
 280    PROT_NONE  : constant := 0;
 281    PROT_READ  : constant := 1;
 282    PROT_WRITE : constant := 2;
 283    PROT_EXEC  : constant := 4;
 284    PROT_ALL   : constant := PROT_READ + PROT_WRITE + PROT_EXEC;
 285
 286    PROT_ON    : constant := PROT_NONE;
 287    PROT_OFF   : constant := PROT_ALL;
 288
 289    function mprotect (addr : Address; len : size_t; prot : int) return int;
 290    pragma Import (C, mprotect);
 291
 292    ---------------------------------------
 293    -- Nonstandard Thread Initialization --
 294    ---------------------------------------
 295
 296    procedure pthread_init;
 297    --  FSU_THREADS requires pthread_init, which is nonstandard
 298    --  and this should be invoked during the elaboration of s-taprop.adb
 299    pragma Import (C, pthread_init, "pthread_init");
 300
 301    -------------------------
 302    -- POSIX.1c  Section 3 --
 303    -------------------------
 304
 305    function sigwait
 306      (set : access sigset_t;
 307       sig : access Signal) return int;
 308    --  FSU_THREADS has a nonstandard sigwait
 309
 310    function pthread_kill
 311      (thread : pthread_t;
 312       sig    : Signal) return   int;
 313    pragma Import (C, pthread_kill, "pthread_kill");
 314
 315    type sigset_t_ptr is access all sigset_t;
 316
 317    function pthread_sigmask
 318      (how  : int;
 319       set  : sigset_t_ptr;
 320       oset : sigset_t_ptr) return int;
 321    pragma Import (C, pthread_sigmask, "pthread_wrapper_sigprocmask");
 322
 323    --------------------------
 324    -- POSIX.1c  Section 11 --
 325    --------------------------
 326
 327    function pthread_mutexattr_init
 328      (attr : access pthread_mutexattr_t) return int;
 329    pragma Import (C, pthread_mutexattr_init, "pthread_mutexattr_init");
 330
 331    function pthread_mutexattr_destroy
 332      (attr : access pthread_mutexattr_t) return int;
 333    pragma Import (C, pthread_mutexattr_destroy, "pthread_mutexattr_destroy");
 334
 335    function pthread_mutex_init
 336      (mutex : access pthread_mutex_t;
 337       attr  : access pthread_mutexattr_t) return int;
 338    pragma Import (C, pthread_mutex_init, "pthread_mutex_init");
 339
 340    function pthread_mutex_destroy (mutex : access pthread_mutex_t) return int;
 341    pragma Import (C, pthread_mutex_destroy, "pthread_mutex_destroy");
 342
 343    function pthread_mutex_lock (mutex : access pthread_mutex_t) return int;
 344    --  FSU_THREADS has nonstandard pthread_mutex_lock
 345
 346    function pthread_mutex_unlock (mutex : access pthread_mutex_t) return int;
 347    --  FSU_THREADS has nonstandard pthread_mutex_lock
 348
 349    function pthread_condattr_init
 350      (attr : access pthread_condattr_t) return int;
 351    pragma Import (C, pthread_condattr_init, "pthread_condattr_init");
 352
 353    function pthread_condattr_destroy
 354      (attr : access pthread_condattr_t) return int;
 355    pragma Import (C, pthread_condattr_destroy, "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 Import (C, pthread_cond_init, "pthread_cond_init");
 361
 362    function pthread_cond_destroy (cond : access pthread_cond_t) return int;
 363    pragma Import (C, pthread_cond_destroy, "pthread_cond_destroy");
 364
 365    function pthread_cond_signal (cond : access pthread_cond_t) return int;
 366    pragma Import (C, pthread_cond_signal, "pthread_cond_signal");
 367
 368    function pthread_cond_wait
 369      (cond  : access pthread_cond_t;
 370       mutex : access pthread_mutex_t) return int;
 371    --  FSU_THREADS has a nonstandard pthread_cond_wait
 372
 373    function pthread_cond_timedwait
 374      (cond    : access pthread_cond_t;
 375       mutex   : access pthread_mutex_t;
 376       abstime : access timespec) return int;
 377    --  FSU_THREADS has a nonstandard pthread_cond_timedwait
 378
 379    Relative_Timed_Wait : constant Boolean := False;
 380    --  pthread_cond_timedwait requires an absolute delay time
 381
 382    --------------------------
 383    -- POSIX.1c  Section 13 --
 384    --------------------------
 385
 386    PTHREAD_PRIO_NONE    : constant := 0;
 387    PTHREAD_PRIO_PROTECT : constant := 2;
 388    PTHREAD_PRIO_INHERIT : constant := 1;
 389
 390    function pthread_mutexattr_setprotocol
 391      (attr     : access pthread_mutexattr_t;
 392       protocol : int) return int;
 393    pragma Import (C, pthread_mutexattr_setprotocol);
 394
 395    function pthread_mutexattr_setprioceiling
 396      (attr     : access pthread_mutexattr_t;
 397       prioceiling : int) return int;
 398    pragma Import
 399      (C, pthread_mutexattr_setprioceiling,
 400       "pthread_mutexattr_setprio_ceiling");
 401
 402    type struct_sched_param is record
 403       sched_priority : int;  --  scheduling priority
 404    end record;
 405
 406    function pthread_setschedparam
 407      (thread : pthread_t;
 408       policy : int;
 409       param  : access struct_sched_param) return int;
 410    --  FSU_THREADS does not have pthread_setschedparam
 411
 412    function pthread_attr_setscope
 413      (attr            : access pthread_attr_t;
 414       contentionscope : int) return int;
 415    pragma Import (C, pthread_attr_setscope, "pthread_attr_setscope");
 416
 417    function pthread_attr_setinheritsched
 418      (attr         : access pthread_attr_t;
 419       inheritsched : int) return int;
 420    pragma Import (C, pthread_attr_setinheritsched);
 421
 422    function pthread_attr_setschedpolicy
 423      (attr   : access pthread_attr_t;
 424       policy : int) return int;
 425    pragma Import
 426     (C, pthread_attr_setschedpolicy, "pthread_attr_setsched");
 427
 428    function sched_yield return int;
 429    --  FSU_THREADS does not have sched_yield;
 430
 431    ---------------------------
 432    -- P1003.1c - Section 16 --
 433    ---------------------------
 434
 435    function pthread_attr_init (attributes : access pthread_attr_t) return int;
 436    pragma Import (C, pthread_attr_init, "pthread_attr_init");
 437
 438    function pthread_attr_destroy
 439      (attributes : access pthread_attr_t) return int;
 440    pragma Import (C, pthread_attr_destroy, "pthread_attr_destroy");
 441
 442    function pthread_attr_setdetachstate
 443      (attr        : access pthread_attr_t;
 444       detachstate : int) return int;
 445    --  FSU_THREADS has a nonstandard pthread_attr_setdetachstate
 446
 447    function pthread_attr_setstacksize
 448      (attr      : access pthread_attr_t;
 449       stacksize : size_t) return int;
 450    pragma Import (C, pthread_attr_setstacksize);
 451
 452    function pthread_create
 453      (thread        : access pthread_t;
 454       attributes    : access pthread_attr_t;
 455       start_routine : Thread_Body;
 456       arg           : System.Address) return int;
 457    pragma Import (C, pthread_create, "pthread_create");
 458
 459    procedure pthread_exit (status : System.Address);
 460    pragma Import (C, pthread_exit, "pthread_exit");
 461
 462    function pthread_self return pthread_t;
 463    pragma Import (C, pthread_self, "pthread_self");
 464
 465    --------------------------
 466    -- POSIX.1c  Section 17 --
 467    --------------------------
 468
 469    function pthread_setspecific
 470      (key   : pthread_key_t;
 471       value : System.Address) return  int;
 472    pragma Import (C, pthread_setspecific, "pthread_setspecific");
 473
 474    function pthread_getspecific (key : pthread_key_t) return System.Address;
 475    --  FSU_THREADS has a nonstandard pthread_getspecific
 476
 477    type destructor_pointer is access procedure (arg : System.Address);
 478
 479    function pthread_key_create
 480      (key        : access pthread_key_t;
 481       destructor : destructor_pointer) return int;
 482    pragma Import (C, pthread_key_create, "pthread_key_create");
 483
 484 private
 485
 486    type sigset_t is new unsigned_long;
 487    pragma Convention (C, sigset_t);
 488
 489    type pid_t is new int;
 490
 491    subtype time_t is long;
 492
 493    type timespec is record
 494       tv_sec  : time_t;
 495       tv_nsec : long;
 496    end record;
 497    pragma Convention (C, timespec);
 498
 499    type clockid_t is new int;
 500    CLOCK_REALTIME : constant clockid_t := 0;
 501
 502    type struct_timeval is record
 503       tv_sec  : time_t;
 504       tv_usec : long;
 505    end record;
 506    pragma Convention (C, struct_timeval);
 507
 508    type pthread_attr_t is record
 509       flags           : int;
 510       stacksize       : int;
 511       contentionscope : int;
 512       inheritsched    : int;
 513       detachstate     : int;
 514       sched           : int;
 515       prio            : int;
 516       starttime       : timespec;
 517       deadline        : timespec;
 518       period          : timespec;
 519    end record;
 520    pragma Convention (C_Pass_By_Copy, pthread_attr_t);
 521
 522    type pthread_condattr_t is record
 523       flags : int;
 524    end record;
 525    pragma Convention (C, pthread_condattr_t);
 526
 527    type pthread_mutexattr_t is record
 528       flags        : int;
 529       prio_ceiling : int;
 530       protocol     : int;
 531    end record;
 532    pragma Convention (C, pthread_mutexattr_t);
 533
 534    type sigjmp_buf is array (Integer range 0 .. 17) of int;
 535
 536    type pthread_t_struct is record
 537       context    : sigjmp_buf;
 538       pbody      : sigjmp_buf;
 539       errno      : int;
 540       ret        : int;
 541       stack_base : System.Address;
 542    end record;
 543    pragma Convention (C, pthread_t_struct);
 544
 545    type pthread_t is access all pthread_t_struct;
 546
 547    type queue_t is record
 548       head : System.Address;
 549       tail : System.Address;
 550    end record;
 551    pragma Convention (C, queue_t);
 552
 553    type pthread_mutex_t is record
 554       queue                 : queue_t;
 555       lock                  : plain_char;
 556       owner                 : System.Address;
 557       flags                 : int;
 558       prio_ceiling          : int;
 559       protocol              : int;
 560       prev_max_ceiling_prio : int;
 561    end record;
 562    pragma Convention (C, pthread_mutex_t);
 563
 564    type pthread_cond_t is record
 565       queue   : queue_t;
 566       flags   : int;
 567       waiters : int;
 568       mutex   : System.Address;
 569    end record;
 570    pragma Convention (C, pthread_cond_t);
 571
 572    type pthread_key_t is new int;
 573
 574 end System.OS_Interface;