gcc/ada/s-osinte-darwin.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) 1995-2011, 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 -- GNARL was developed by the GNARL team at Florida State University.       --
  29 -- Extensive contributions were provided by Ada Core Technologies, Inc.     --
  30 --                                                                          --
  31 ------------------------------------------------------------------------------
  32
  33 --  This is Darwin pthreads version of this package
  34
  35 --  This package includes all direct interfaces to OS services that are needed
  36 --  by the tasking run-time (libgnarl).
  37
  38 --  PLEASE DO NOT add any with-clauses to this package or remove the pragma
  39 --  Elaborate_Body. It is designed to be a bottom-level (leaf) package.
  40
  41 with Interfaces.C;
  42 with System.OS_Constants;
  43
  44 package System.OS_Interface is
  45    pragma Preelaborate;
  46
  47    subtype int            is Interfaces.C.int;
  48    subtype short          is Interfaces.C.short;
  49    subtype long           is Interfaces.C.long;
  50    subtype unsigned       is Interfaces.C.unsigned;
  51    subtype unsigned_short is Interfaces.C.unsigned_short;
  52    subtype unsigned_long  is Interfaces.C.unsigned_long;
  53    subtype unsigned_char  is Interfaces.C.unsigned_char;
  54    subtype plain_char     is Interfaces.C.plain_char;
  55    subtype size_t         is Interfaces.C.size_t;
  56
  57    -----------
  58    -- Errno --
  59    -----------
  60
  61    function errno return int;
  62    pragma Import (C, errno, "__get_errno");
  63
  64    EINTR     : constant := 4;
  65    ENOMEM    : constant := 12;
  66    EINVAL    : constant := 22;
  67    EAGAIN    : constant := 35;
  68    ETIMEDOUT : constant := 60;
  69
  70    -------------
  71    -- Signals --
  72    -------------
  73
  74    Max_Interrupt : constant := 31;
  75    type Signal is new int range 0 .. Max_Interrupt;
  76    for Signal'Size use int'Size;
  77
  78    SIGHUP     : constant := 1; --  hangup
  79    SIGINT     : constant := 2; --  interrupt (rubout)
  80    SIGQUIT    : constant := 3; --  quit (ASCD FS)
  81    SIGILL     : constant := 4; --  illegal instruction (not reset)
  82    SIGTRAP    : constant := 5; --  trace trap (not reset)
  83    SIGIOT     : constant := 6; --  IOT instruction
  84    SIGABRT    : constant := 6; --  used by abort, replace SIGIOT in the  future
  85    SIGEMT     : constant := 7; --  EMT instruction
  86    SIGFPE     : constant := 8; --  floating point exception
  87    SIGKILL    : constant := 9; --  kill (cannot be caught or ignored)
  88    SIGBUS     : constant := 10; --  bus error
  89    SIGSEGV    : constant := 11; --  segmentation violation
  90    SIGSYS     : constant := 12; --  bad argument to system call
  91    SIGPIPE    : constant := 13; --  write on a pipe with no one to read it
  92    SIGALRM    : constant := 14; --  alarm clock
  93    SIGTERM    : constant := 15; --  software termination signal from kill
  94    SIGURG     : constant := 16; --  urgent condition on IO channel
  95    SIGSTOP    : constant := 17; --  stop (cannot be caught or ignored)
  96    SIGTSTP    : constant := 18; --  user stop requested from tty
  97    SIGCONT    : constant := 19; --  stopped process has been continued
  98    SIGCHLD    : constant := 20; --  child status change
  99    SIGTTIN    : constant := 21; --  background tty read attempted
 100    SIGTTOU    : constant := 22; --  background tty write attempted
 101    SIGIO      : constant := 23; --  I/O possible (Solaris SIGPOLL alias)
 102    SIGXCPU    : constant := 24; --  CPU time limit exceeded
 103    SIGXFSZ    : constant := 25; --  filesize limit exceeded
 104    SIGVTALRM  : constant := 26; --  virtual timer expired
 105    SIGPROF    : constant := 27; --  profiling timer expired
 106    SIGWINCH   : constant := 28; --  window size change
 107    SIGINFO    : constant := 29; --  information request
 108    SIGUSR1    : constant := 30; --  user defined signal 1
 109    SIGUSR2    : constant := 31; --  user defined signal 2
 110
 111    SIGADAABORT : constant := SIGTERM;
 112    --  Change this if you want to use another signal for task abort.
 113    --  SIGTERM might be a good one.
 114
 115    type Signal_Set is array (Natural range <>) of Signal;
 116
 117    Unmasked : constant Signal_Set :=
 118                 (SIGTTIN, SIGTTOU, SIGSTOP, SIGTSTP);
 119
 120    Reserved : constant Signal_Set :=
 121                 (SIGKILL, SIGSTOP);
 122
 123    Exception_Signals : constant Signal_Set :=
 124                          (SIGFPE, SIGILL, SIGSEGV, SIGBUS);
 125    --  These signals (when runtime or system) will be caught and converted
 126    --  into an Ada exception.
 127
 128    type sigset_t is private;
 129
 130    function sigaddset (set : access sigset_t; sig : Signal) return int;
 131    pragma Import (C, sigaddset, "sigaddset");
 132
 133    function sigdelset (set : access sigset_t; sig : Signal) return int;
 134    pragma Import (C, sigdelset, "sigdelset");
 135
 136    function sigfillset (set : access sigset_t) return int;
 137    pragma Import (C, sigfillset, "sigfillset");
 138
 139    function sigismember (set : access sigset_t; sig : Signal) return int;
 140    pragma Import (C, sigismember, "sigismember");
 141
 142    function sigemptyset (set : access sigset_t) return int;
 143    pragma Import (C, sigemptyset, "sigemptyset");
 144
 145    type siginfo_t is private;
 146    type ucontext_t is private;
 147
 148    type Signal_Handler is access procedure
 149      (signo   : Signal;
 150       info    : access siginfo_t;
 151       context : access ucontext_t);
 152
 153    type struct_sigaction is record
 154       sa_handler : System.Address;
 155       sa_mask    : sigset_t;
 156       sa_flags   : int;
 157    end record;
 158    pragma Convention (C, struct_sigaction);
 159    type struct_sigaction_ptr is access all struct_sigaction;
 160
 161    SIG_BLOCK   : constant := 1;
 162    SIG_UNBLOCK : constant := 2;
 163    SIG_SETMASK : constant := 3;
 164
 165    SIG_DFL : constant := 0;
 166    SIG_IGN : constant := 1;
 167
 168    SA_SIGINFO : constant := 16#0040#;
 169    SA_ONSTACK : constant := 16#0001#;
 170
 171    function sigaction
 172      (sig  : Signal;
 173       act  : struct_sigaction_ptr;
 174       oact : struct_sigaction_ptr) return int;
 175    pragma Import (C, sigaction, "sigaction");
 176
 177    ----------
 178    -- Time --
 179    ----------
 180
 181    Time_Slice_Supported : constant Boolean := True;
 182    --  Indicates whether time slicing is supported
 183
 184    type timespec is private;
 185
 186    type clockid_t is private;
 187
 188    CLOCK_REALTIME  : constant clockid_t;
 189    CLOCK_MONOTONIC : constant clockid_t;
 190
 191    function clock_gettime
 192      (clock_id : clockid_t;
 193       tp       : access timespec) return int;
 194
 195    function To_Duration (TS : timespec) return Duration;
 196    pragma Inline (To_Duration);
 197
 198    function To_Timespec (D : Duration) return timespec;
 199    pragma Inline (To_Timespec);
 200
 201    -------------------------
 202    -- Priority Scheduling --
 203    -------------------------
 204
 205    SCHED_OTHER : constant := 1;
 206    SCHED_RR    : constant := 2;
 207    SCHED_FIFO  : constant := 4;
 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    --  Return the mach thread bound to the current thread.  The value is not
 231    --  used by the run-time library but made available to debuggers.
 232
 233    -------------
 234    -- Threads --
 235    -------------
 236
 237    type Thread_Body is access
 238      function (arg : System.Address) return System.Address;
 239    pragma Convention (C, Thread_Body);
 240
 241    type pthread_t           is private;
 242    subtype Thread_Id        is pthread_t;
 243
 244    type pthread_mutex_t     is limited private;
 245    type pthread_cond_t      is limited private;
 246    type pthread_attr_t      is limited private;
 247    type pthread_mutexattr_t is limited private;
 248    type pthread_condattr_t  is limited private;
 249    type pthread_key_t       is private;
 250
 251    type pthread_mutex_ptr is access all pthread_mutex_t;
 252    type pthread_cond_ptr is access all pthread_cond_t;
 253
 254    PTHREAD_CREATE_DETACHED : constant := 2;
 255
 256    PTHREAD_SCOPE_PROCESS : constant := 2;
 257    PTHREAD_SCOPE_SYSTEM  : constant := 1;
 258
 259    -----------
 260    -- Stack --
 261    -----------
 262
 263    type stack_t is record
 264       ss_sp    : System.Address;
 265       ss_size  : size_t;
 266       ss_flags : int;
 267    end record;
 268    pragma Convention (C, stack_t);
 269
 270    function sigaltstack
 271      (ss  : not null access stack_t;
 272       oss : access stack_t) return int;
 273    pragma Import (C, sigaltstack, "sigaltstack");
 274
 275    Alternate_Stack : aliased System.Address;
 276    pragma Import (C, Alternate_Stack, "__gnat_alternate_stack");
 277    --  The alternate signal stack for stack overflows
 278
 279    Alternate_Stack_Size : constant := 32 * 1024;
 280    --  This must be in keeping with init.c:__gnat_alternate_stack
 281
 282    Stack_Base_Available : constant Boolean := False;
 283    --  Indicates whether the stack base is available on this target. This
 284    --  allows us to share s-osinte.adb between all the FSU run time. Note that
 285    --  this value can only be true if pthread_t has a complete definition that
 286    --  corresponds exactly to the C header files.
 287
 288    function Get_Stack_Base (thread : pthread_t) return System.Address;
 289    pragma Inline (Get_Stack_Base);
 290    --  returns the stack base of the specified thread. Only call this function
 291    --  when Stack_Base_Available is True.
 292
 293    function Get_Page_Size return size_t;
 294    function Get_Page_Size return System.Address;
 295    pragma Import (C, Get_Page_Size, "getpagesize");
 296    --  Returns the size of a page
 297
 298    PROT_NONE  : constant := 0;
 299    PROT_READ  : constant := 1;
 300    PROT_WRITE : constant := 2;
 301    PROT_EXEC  : constant := 4;
 302    PROT_ALL   : constant := PROT_READ + PROT_WRITE + PROT_EXEC;
 303
 304    PROT_ON    : constant := PROT_NONE;
 305    PROT_OFF   : constant := PROT_ALL;
 306
 307    function mprotect
 308      (addr : System.Address;
 309       len  : size_t;
 310       prot : int) return int;
 311    pragma Import (C, mprotect);
 312
 313    ---------------------------------------
 314    -- Nonstandard Thread Initialization --
 315    ---------------------------------------
 316
 317    procedure pthread_init;
 318
 319    -------------------------
 320    -- POSIX.1c  Section 3 --
 321    -------------------------
 322
 323    function sigwait (set : access sigset_t; sig : access Signal) return int;
 324    pragma Import (C, sigwait, "sigwait");
 325
 326    function pthread_kill (thread : pthread_t; sig : Signal) return int;
 327    pragma Import (C, pthread_kill, "pthread_kill");
 328
 329    function pthread_sigmask
 330      (how  : int;
 331       set  : access sigset_t;
 332       oset : access sigset_t) return int;
 333    pragma Import (C, pthread_sigmask, "pthread_sigmask");
 334
 335    --------------------------
 336    -- POSIX.1c  Section 11 --
 337    --------------------------
 338
 339    function pthread_mutexattr_init
 340      (attr : access pthread_mutexattr_t) return int;
 341    pragma Import (C, pthread_mutexattr_init, "pthread_mutexattr_init");
 342
 343    function pthread_mutexattr_destroy
 344      (attr : access pthread_mutexattr_t) return int;
 345    pragma Import (C, pthread_mutexattr_destroy, "pthread_mutexattr_destroy");
 346
 347    function pthread_mutex_init
 348      (mutex : access pthread_mutex_t;
 349       attr  : access pthread_mutexattr_t) return int;
 350    pragma Import (C, pthread_mutex_init, "pthread_mutex_init");
 351
 352    function pthread_mutex_destroy (mutex : access pthread_mutex_t) return int;
 353    pragma Import (C, pthread_mutex_destroy, "pthread_mutex_destroy");
 354
 355    function pthread_mutex_lock (mutex : access pthread_mutex_t) return int;
 356    pragma Import (C, pthread_mutex_lock, "pthread_mutex_lock");
 357
 358    function pthread_mutex_unlock (mutex : access pthread_mutex_t) return int;
 359    pragma Import (C, pthread_mutex_unlock, "pthread_mutex_unlock");
 360
 361    function pthread_condattr_init
 362      (attr : access pthread_condattr_t) return int;
 363    pragma Import (C, pthread_condattr_init, "pthread_condattr_init");
 364
 365    function pthread_condattr_destroy
 366      (attr : access pthread_condattr_t) return int;
 367    pragma Import (C, pthread_condattr_destroy, "pthread_condattr_destroy");
 368
 369    function pthread_cond_init
 370      (cond : access pthread_cond_t;
 371       attr : access pthread_condattr_t) return int;
 372    pragma Import (C, pthread_cond_init, "pthread_cond_init");
 373
 374    function pthread_cond_destroy (cond : access pthread_cond_t) return int;
 375    pragma Import (C, pthread_cond_destroy, "pthread_cond_destroy");
 376
 377    function pthread_cond_signal (cond : access pthread_cond_t) return int;
 378    pragma Import (C, pthread_cond_signal, "pthread_cond_signal");
 379
 380    function pthread_cond_wait
 381      (cond  : access pthread_cond_t;
 382       mutex : access pthread_mutex_t) return int;
 383    pragma Import (C, pthread_cond_wait, "pthread_cond_wait");
 384
 385    function pthread_cond_timedwait
 386      (cond    : access pthread_cond_t;
 387       mutex   : access pthread_mutex_t;
 388       abstime : access timespec) return int;
 389    pragma Import (C, pthread_cond_timedwait, "pthread_cond_timedwait");
 390
 391    Relative_Timed_Wait : constant Boolean := False;
 392    --  pthread_cond_timedwait requires an absolute delay time
 393
 394    --------------------------
 395    -- POSIX.1c  Section 13 --
 396    --------------------------
 397
 398    PTHREAD_PRIO_NONE    : constant := 0;
 399    PTHREAD_PRIO_INHERIT : constant := 1;
 400    PTHREAD_PRIO_PROTECT : constant := 2;
 401
 402    function pthread_mutexattr_setprotocol
 403      (attr     : access pthread_mutexattr_t;
 404       protocol : int) return int;
 405    pragma Import
 406      (C, pthread_mutexattr_setprotocol, "pthread_mutexattr_setprotocol");
 407
 408    function pthread_mutexattr_setprioceiling
 409      (attr     : access pthread_mutexattr_t;
 410       prioceiling : int) return int;
 411    pragma Import
 412      (C, pthread_mutexattr_setprioceiling,
 413       "pthread_mutexattr_setprioceiling");
 414
 415    type padding is array (int range <>) of Interfaces.C.char;
 416
 417    type struct_sched_param is record
 418       sched_priority : int;  --  scheduling priority
 419       opaque         : padding (1 .. 4);
 420    end record;
 421    pragma Convention (C, struct_sched_param);
 422
 423    function pthread_setschedparam
 424      (thread : pthread_t;
 425       policy : int;
 426       param  : access struct_sched_param) return int;
 427    pragma Import (C, pthread_setschedparam, "pthread_setschedparam");
 428
 429    function pthread_attr_setscope
 430      (attr            : access pthread_attr_t;
 431       contentionscope : int) return int;
 432    pragma Import (C, pthread_attr_setscope, "pthread_attr_setscope");
 433
 434    function pthread_attr_setinheritsched
 435      (attr            : access pthread_attr_t;
 436       inheritsched : int) return int;
 437    pragma Import
 438      (C, pthread_attr_setinheritsched, "pthread_attr_setinheritsched");
 439
 440    function pthread_attr_setschedpolicy
 441      (attr   : access pthread_attr_t;
 442       policy : int) return int;
 443    pragma Import (C, pthread_attr_setschedpolicy, "pthread_attr_setsched");
 444
 445    function sched_yield return int;
 446
 447    ---------------------------
 448    -- P1003.1c - Section 16 --
 449    ---------------------------
 450
 451    function pthread_attr_init (attributes : access pthread_attr_t) return int;
 452    pragma Import (C, pthread_attr_init, "pthread_attr_init");
 453
 454    function pthread_attr_destroy
 455      (attributes : access pthread_attr_t) return int;
 456    pragma Import (C, pthread_attr_destroy, "pthread_attr_destroy");
 457
 458    function pthread_attr_setdetachstate
 459      (attr        : access pthread_attr_t;
 460       detachstate : int) return int;
 461    pragma Import
 462      (C, pthread_attr_setdetachstate, "pthread_attr_setdetachstate");
 463
 464    function pthread_attr_setstacksize
 465      (attr      : access pthread_attr_t;
 466       stacksize : size_t) return int;
 467    pragma Import
 468      (C, pthread_attr_setstacksize, "pthread_attr_setstacksize");
 469
 470    function pthread_create
 471      (thread        : access pthread_t;
 472       attributes    : access pthread_attr_t;
 473       start_routine : Thread_Body;
 474       arg           : System.Address) return int;
 475    pragma Import (C, pthread_create, "pthread_create");
 476
 477    procedure pthread_exit (status : System.Address);
 478    pragma Import (C, pthread_exit, "pthread_exit");
 479
 480    function pthread_self return pthread_t;
 481    pragma Import (C, pthread_self, "pthread_self");
 482
 483    --------------------------
 484    -- POSIX.1c  Section 17 --
 485    --------------------------
 486
 487    function pthread_setspecific
 488      (key   : pthread_key_t;
 489       value : System.Address) return int;
 490    pragma Import (C, pthread_setspecific, "pthread_setspecific");
 491
 492    function pthread_getspecific (key : pthread_key_t) return System.Address;
 493    pragma Import (C, pthread_getspecific, "pthread_getspecific");
 494
 495    type destructor_pointer is access procedure (arg : System.Address);
 496    pragma Convention (C, destructor_pointer);
 497
 498    function pthread_key_create
 499      (key        : access pthread_key_t;
 500       destructor : destructor_pointer) return int;
 501    pragma Import (C, pthread_key_create, "pthread_key_create");
 502
 503 private
 504
 505    type sigset_t is new unsigned;
 506
 507    type int32_t is new int;
 508
 509    type pid_t is new int32_t;
 510
 511    type time_t is new long;
 512
 513    type timespec is record
 514       tv_sec  : time_t;
 515       tv_nsec : long;
 516    end record;
 517    pragma Convention (C, timespec);
 518
 519    type clockid_t is new int;
 520    CLOCK_REALTIME  : constant clockid_t := 0;
 521    CLOCK_MONOTONIC : constant clockid_t := CLOCK_REALTIME;
 522
 523    --
 524    --  Darwin specific signal implementation
 525    --
 526    type Pad_Type is array (1 .. 7) of unsigned_long;
 527    type siginfo_t is record
 528       si_signo  : int;               --  signal number
 529       si_errno  : int;               --  errno association
 530       si_code   : int;               --  signal code
 531       si_pid    : int;               --  sending process
 532       si_uid    : unsigned;          --  sender's ruid
 533       si_status : int;               --  exit value
 534       si_addr   : System.Address;    --  faulting instruction
 535       si_value  : System.Address;    --  signal value
 536       si_band   : long;              --  band event for SIGPOLL
 537       pad       : Pad_Type;          --  RFU
 538    end record;
 539    pragma Convention (C, siginfo_t);
 540
 541    type mcontext_t is new System.Address;
 542
 543    type ucontext_t is record
 544       uc_onstack  : int;
 545       uc_sigmask  : sigset_t;         --  Signal Mask Used By This Context
 546       uc_stack    : stack_t;          --  Stack Used By This Context
 547       uc_link     : System.Address;   --  Pointer To Resuming Context
 548       uc_mcsize   : size_t;           --  Size of The Machine Context
 549       uc_mcontext : mcontext_t;       --  Machine Specific Context
 550    end record;
 551    pragma Convention (C, ucontext_t);
 552
 553    --
 554    --  Darwin specific pthread implementation
 555    --
 556    type pthread_t is new System.Address;
 557
 558    type pthread_attr_t is record
 559       sig    : long;
 560       opaque : padding (1 .. System.OS_Constants.PTHREAD_ATTR_SIZE);
 561    end record;
 562    pragma Convention (C, pthread_attr_t);
 563
 564    type pthread_mutexattr_t is record
 565       sig    : long;
 566       opaque : padding (1 .. System.OS_Constants.PTHREAD_MUTEXATTR_SIZE);
 567    end record;
 568    pragma Convention (C, pthread_mutexattr_t);
 569
 570    type pthread_mutex_t is record
 571       sig    : long;
 572       opaque : padding (1 .. System.OS_Constants.PTHREAD_MUTEX_SIZE);
 573    end record;
 574    pragma Convention (C, pthread_mutex_t);
 575
 576    type pthread_condattr_t is record
 577       sig    : long;
 578       opaque : padding (1 .. System.OS_Constants.PTHREAD_CONDATTR_SIZE);
 579    end record;
 580    pragma Convention (C, pthread_condattr_t);
 581
 582    type pthread_cond_t is record
 583       sig    : long;
 584       opaque : padding (1 .. System.OS_Constants.PTHREAD_COND_SIZE);
 585    end record;
 586    pragma Convention (C, pthread_cond_t);
 587
 588    type pthread_once_t is record
 589       sig    : long;
 590       opaque : padding (1 .. System.OS_Constants.PTHREAD_ONCE_SIZE);
 591    end record;
 592    pragma Convention (C, pthread_once_t);
 593
 594    type pthread_key_t is new unsigned_long;
 595
 596 end System.OS_Interface;