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) 1995-2009, 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 Darwin pthreads version of this package
  36
  37 --  This package includes all direct interfaces to OS services that are needed
  38 --  by the tasking run-time (libgnarl).
  39
  40 --  PLEASE DO NOT add any with-clauses to this package or remove the pragma
  41 --  Elaborate_Body. It is designed to be a bottom-level (leaf) package.
  42
  43 with Interfaces.C;
  44 with System.OS_Constants;
  45
  46 package System.OS_Interface is
  47    pragma Preelaborate;
  48
  49    subtype int            is Interfaces.C.int;
  50    subtype short          is Interfaces.C.short;
  51    subtype long           is Interfaces.C.long;
  52    subtype unsigned       is Interfaces.C.unsigned;
  53    subtype unsigned_short is Interfaces.C.unsigned_short;
  54    subtype unsigned_long  is Interfaces.C.unsigned_long;
  55    subtype unsigned_char  is Interfaces.C.unsigned_char;
  56    subtype plain_char     is Interfaces.C.plain_char;
  57    subtype size_t         is Interfaces.C.size_t;
  58
  59    -----------
  60    -- Errno --
  61    -----------
  62
  63    function errno return int;
  64    pragma Import (C, errno, "__get_errno");
  65
  66    EINTR     : constant := 4;
  67    ENOMEM    : constant := 12;
  68    EINVAL    : constant := 22;
  69    EAGAIN    : constant := 35;
  70    ETIMEDOUT : constant := 60;
  71
  72    -------------
  73    -- Signals --
  74    -------------
  75
  76    Max_Interrupt : constant := 31;
  77    type Signal is new int range 0 .. Max_Interrupt;
  78    for Signal'Size use int'Size;
  79
  80    SIGHUP     : constant := 1; --  hangup
  81    SIGINT     : constant := 2; --  interrupt (rubout)
  82    SIGQUIT    : constant := 3; --  quit (ASCD FS)
  83    SIGILL     : constant := 4; --  illegal instruction (not reset)
  84    SIGTRAP    : constant := 5; --  trace trap (not reset)
  85    SIGIOT     : constant := 6; --  IOT instruction
  86    SIGABRT    : constant := 6; --  used by abort, replace SIGIOT in the  future
  87    SIGEMT     : constant := 7; --  EMT instruction
  88    SIGFPE     : constant := 8; --  floating point exception
  89    SIGKILL    : constant := 9; --  kill (cannot be caught or ignored)
  90    SIGBUS     : constant := 10; --  bus error
  91    SIGSEGV    : constant := 11; --  segmentation violation
  92    SIGSYS     : constant := 12; --  bad argument to system call
  93    SIGPIPE    : constant := 13; --  write on a pipe with no one to read it
  94    SIGALRM    : constant := 14; --  alarm clock
  95    SIGTERM    : constant := 15; --  software termination signal from kill
  96    SIGURG     : constant := 16; --  urgent condition on IO channel
  97    SIGSTOP    : constant := 17; --  stop (cannot be caught or ignored)
  98    SIGTSTP    : constant := 18; --  user stop requested from tty
  99    SIGCONT    : constant := 19; --  stopped process has been continued
 100    SIGCHLD    : constant := 20; --  child status change
 101    SIGTTIN    : constant := 21; --  background tty read attempted
 102    SIGTTOU    : constant := 22; --  background tty write attempted
 103    SIGIO      : constant := 23; --  I/O possible (Solaris SIGPOLL alias)
 104    SIGXCPU    : constant := 24; --  CPU time limit exceeded
 105    SIGXFSZ    : constant := 25; --  filesize limit exceeded
 106    SIGVTALRM  : constant := 26; --  virtual timer expired
 107    SIGPROF    : constant := 27; --  profiling timer expired
 108    SIGWINCH   : constant := 28; --  window size change
 109    SIGINFO    : constant := 29; --  information request
 110    SIGUSR1    : constant := 30; --  user defined signal 1
 111    SIGUSR2    : constant := 31; --  user defined signal 2
 112
 113    SIGADAABORT : constant := SIGTERM;
 114    --  Change this if you want to use another signal for task abort.
 115    --  SIGTERM might be a good one.
 116
 117    type Signal_Set is array (Natural range <>) of Signal;
 118
 119    Unmasked : constant Signal_Set :=
 120                 (SIGTTIN, SIGTTOU, SIGSTOP, SIGTSTP);
 121
 122    Reserved : constant Signal_Set :=
 123                 (SIGKILL, SIGSTOP);
 124
 125    Exception_Signals : constant Signal_Set :=
 126                          (SIGFPE, SIGILL, SIGSEGV, SIGBUS);
 127    --  These signals (when runtime or system) will be caught and converted
 128    --  into an Ada exception.
 129
 130    type sigset_t is private;
 131
 132    function sigaddset (set : access sigset_t; sig : Signal) return int;
 133    pragma Import (C, sigaddset, "sigaddset");
 134
 135    function sigdelset (set : access sigset_t; sig : Signal) return int;
 136    pragma Import (C, sigdelset, "sigdelset");
 137
 138    function sigfillset (set : access sigset_t) return int;
 139    pragma Import (C, sigfillset, "sigfillset");
 140
 141    function sigismember (set : access sigset_t; sig : Signal) return int;
 142    pragma Import (C, sigismember, "sigismember");
 143
 144    function sigemptyset (set : access sigset_t) return int;
 145    pragma Import (C, sigemptyset, "sigemptyset");
 146
 147    type siginfo_t is private;
 148    type ucontext_t is private;
 149
 150    type Signal_Handler is access procedure
 151      (signo   : Signal;
 152       info    : access siginfo_t;
 153       context : access ucontext_t);
 154
 155    type struct_sigaction is record
 156       sa_handler : System.Address;
 157       sa_mask    : sigset_t;
 158       sa_flags   : int;
 159    end record;
 160    pragma Convention (C, struct_sigaction);
 161    type struct_sigaction_ptr is access all struct_sigaction;
 162
 163    SIG_BLOCK   : constant := 1;
 164    SIG_UNBLOCK : constant := 2;
 165    SIG_SETMASK : constant := 3;
 166
 167    SIG_DFL : constant := 0;
 168    SIG_IGN : constant := 1;
 169
 170    SA_SIGINFO : constant := 16#0040#;
 171    SA_ONSTACK : constant := 16#0001#;
 172
 173    function sigaction
 174      (sig  : Signal;
 175       act  : struct_sigaction_ptr;
 176       oact : struct_sigaction_ptr) return int;
 177    pragma Import (C, sigaction, "sigaction");
 178
 179    ----------
 180    -- Time --
 181    ----------
 182
 183    Time_Slice_Supported : constant Boolean := True;
 184    --  Indicates whether time slicing is supported
 185
 186    type timespec is private;
 187
 188    type clockid_t is private;
 189
 190    CLOCK_REALTIME : constant clockid_t;
 191
 192    function clock_gettime
 193      (clock_id : clockid_t;
 194       tp       : access timespec) return int;
 195
 196    function To_Duration (TS : timespec) return Duration;
 197    pragma Inline (To_Duration);
 198
 199    function To_Timespec (D : Duration) return timespec;
 200    pragma Inline (To_Timespec);
 201
 202    type struct_timeval is private;
 203
 204    function To_Duration (TV : struct_timeval) return Duration;
 205    pragma Inline (To_Duration);
 206
 207    function To_Timeval (D : Duration) return struct_timeval;
 208    pragma Inline (To_Timeval);
 209
 210    -------------------------
 211    -- Priority Scheduling --
 212    -------------------------
 213
 214    SCHED_OTHER : constant := 1;
 215    SCHED_RR    : constant := 2;
 216    SCHED_FIFO  : constant := 4;
 217
 218    function To_Target_Priority
 219      (Prio : System.Any_Priority) return Interfaces.C.int;
 220    --  Maps System.Any_Priority to a POSIX priority
 221
 222    -------------
 223    -- Process --
 224    -------------
 225
 226    type pid_t is private;
 227
 228    function kill (pid : pid_t; sig : Signal) return int;
 229    pragma Import (C, kill, "kill");
 230
 231    function getpid return pid_t;
 232    pragma Import (C, getpid, "getpid");
 233
 234    ---------
 235    -- LWP --
 236    ---------
 237
 238    function lwp_self return System.Address;
 239    --  Return the mach thread bound to the current thread.  The value is not
 240    --  used by the run-time library but made available to debuggers.
 241
 242    -------------
 243    -- Threads --
 244    -------------
 245
 246    type Thread_Body is access
 247      function (arg : System.Address) return System.Address;
 248    pragma Convention (C, Thread_Body);
 249
 250    type pthread_t           is private;
 251    subtype Thread_Id        is pthread_t;
 252
 253    type pthread_mutex_t     is limited private;
 254    type pthread_cond_t      is limited private;
 255    type pthread_attr_t      is limited private;
 256    type pthread_mutexattr_t is limited private;
 257    type pthread_condattr_t  is limited private;
 258    type pthread_key_t       is private;
 259
 260    type pthread_mutex_ptr is access all pthread_mutex_t;
 261    type pthread_cond_ptr is access all pthread_cond_t;
 262
 263    PTHREAD_CREATE_DETACHED : constant := 2;
 264
 265    PTHREAD_SCOPE_PROCESS : constant := 2;
 266    PTHREAD_SCOPE_SYSTEM  : constant := 1;
 267
 268    -----------
 269    -- Stack --
 270    -----------
 271
 272    type stack_t is record
 273       ss_sp    : System.Address;
 274       ss_size  : size_t;
 275       ss_flags : int;
 276    end record;
 277    pragma Convention (C, stack_t);
 278
 279    function sigaltstack
 280      (ss  : not null access stack_t;
 281       oss : access stack_t) return int;
 282    pragma Import (C, sigaltstack, "sigaltstack");
 283
 284    Alternate_Stack : aliased System.Address;
 285    pragma Import (C, Alternate_Stack, "__gnat_alternate_stack");
 286    --  The alternate signal stack for stack overflows
 287
 288    Alternate_Stack_Size : constant := 32 * 1024;
 289    --  This must be in keeping with init.c:__gnat_alternate_stack
 290
 291    Stack_Base_Available : constant Boolean := False;
 292    --  Indicates whether the stack base is available on this target. This
 293    --  allows us to share s-osinte.adb between all the FSU run time. Note that
 294    --  this value can only be true if pthread_t has a complete definition that
 295    --  corresponds exactly to the C header files.
 296
 297    function Get_Stack_Base (thread : pthread_t) return System.Address;
 298    pragma Inline (Get_Stack_Base);
 299    --  returns the stack base of the specified thread. Only call this function
 300    --  when Stack_Base_Available is True.
 301
 302    function Get_Page_Size return size_t;
 303    function Get_Page_Size return System.Address;
 304    pragma Import (C, Get_Page_Size, "getpagesize");
 305    --  Returns the size of a page, or 0 if this is not relevant on this target
 306
 307    PROT_NONE  : constant := 0;
 308    PROT_READ  : constant := 1;
 309    PROT_WRITE : constant := 2;
 310    PROT_EXEC  : constant := 4;
 311    PROT_ALL   : constant := PROT_READ + PROT_WRITE + PROT_EXEC;
 312
 313    PROT_ON    : constant := PROT_NONE;
 314    PROT_OFF   : constant := PROT_ALL;
 315
 316    function mprotect
 317      (addr : System.Address;
 318       len  : size_t;
 319       prot : int) return int;
 320    pragma Import (C, mprotect);
 321
 322    ---------------------------------------
 323    -- Nonstandard Thread Initialization --
 324    ---------------------------------------
 325
 326    procedure pthread_init;
 327
 328    -------------------------
 329    -- POSIX.1c  Section 3 --
 330    -------------------------
 331
 332    function sigwait (set : access sigset_t; sig : access Signal) return int;
 333    pragma Import (C, sigwait, "sigwait");
 334
 335    function pthread_kill (thread : pthread_t; sig : Signal) return int;
 336    pragma Import (C, pthread_kill, "pthread_kill");
 337
 338    function pthread_sigmask
 339      (how  : int;
 340       set  : access sigset_t;
 341       oset : access sigset_t) return int;
 342    pragma Import (C, pthread_sigmask, "pthread_sigmask");
 343
 344    --------------------------
 345    -- POSIX.1c  Section 11 --
 346    --------------------------
 347
 348    function pthread_mutexattr_init
 349      (attr : access pthread_mutexattr_t) return int;
 350    pragma Import (C, pthread_mutexattr_init, "pthread_mutexattr_init");
 351
 352    function pthread_mutexattr_destroy
 353      (attr : access pthread_mutexattr_t) return int;
 354    pragma Import (C, pthread_mutexattr_destroy, "pthread_mutexattr_destroy");
 355
 356    function pthread_mutex_init
 357      (mutex : access pthread_mutex_t;
 358       attr  : access pthread_mutexattr_t) return int;
 359    pragma Import (C, pthread_mutex_init, "pthread_mutex_init");
 360
 361    function pthread_mutex_destroy (mutex : access pthread_mutex_t) return int;
 362    pragma Import (C, pthread_mutex_destroy, "pthread_mutex_destroy");
 363
 364    function pthread_mutex_lock (mutex : access pthread_mutex_t) return int;
 365    pragma Import (C, pthread_mutex_lock, "pthread_mutex_lock");
 366
 367    function pthread_mutex_unlock (mutex : access pthread_mutex_t) return int;
 368    pragma Import (C, pthread_mutex_unlock, "pthread_mutex_unlock");
 369
 370    function pthread_condattr_init
 371      (attr : access pthread_condattr_t) return int;
 372    pragma Import (C, pthread_condattr_init, "pthread_condattr_init");
 373
 374    function pthread_condattr_destroy
 375      (attr : access pthread_condattr_t) return int;
 376    pragma Import (C, pthread_condattr_destroy, "pthread_condattr_destroy");
 377
 378    function pthread_cond_init
 379      (cond : access pthread_cond_t;
 380       attr : access pthread_condattr_t) return int;
 381    pragma Import (C, pthread_cond_init, "pthread_cond_init");
 382
 383    function pthread_cond_destroy (cond : access pthread_cond_t) return int;
 384    pragma Import (C, pthread_cond_destroy, "pthread_cond_destroy");
 385
 386    function pthread_cond_signal (cond : access pthread_cond_t) return int;
 387    pragma Import (C, pthread_cond_signal, "pthread_cond_signal");
 388
 389    function pthread_cond_wait
 390      (cond  : access pthread_cond_t;
 391       mutex : access pthread_mutex_t) return int;
 392    pragma Import (C, pthread_cond_wait, "pthread_cond_wait");
 393
 394    function pthread_cond_timedwait
 395      (cond    : access pthread_cond_t;
 396       mutex   : access pthread_mutex_t;
 397       abstime : access timespec) return int;
 398    pragma Import (C, pthread_cond_timedwait, "pthread_cond_timedwait");
 399
 400    Relative_Timed_Wait : constant Boolean := False;
 401    --  pthread_cond_timedwait requires an absolute delay time
 402
 403    --------------------------
 404    -- POSIX.1c  Section 13 --
 405    --------------------------
 406
 407    PTHREAD_PRIO_NONE    : constant := 0;
 408    PTHREAD_PRIO_INHERIT : constant := 1;
 409    PTHREAD_PRIO_PROTECT : constant := 2;
 410
 411    function pthread_mutexattr_setprotocol
 412      (attr     : access pthread_mutexattr_t;
 413       protocol : int) return int;
 414    pragma Import
 415      (C, pthread_mutexattr_setprotocol, "pthread_mutexattr_setprotocol");
 416
 417    function pthread_mutexattr_setprioceiling
 418      (attr     : access pthread_mutexattr_t;
 419       prioceiling : int) return int;
 420    pragma Import
 421      (C, pthread_mutexattr_setprioceiling,
 422       "pthread_mutexattr_setprioceiling");
 423
 424    type padding is array (int range <>) of Interfaces.C.char;
 425
 426    type struct_sched_param is record
 427       sched_priority : int;  --  scheduling priority
 428       opaque         : padding (1 .. 4);
 429    end record;
 430    pragma Convention (C, struct_sched_param);
 431
 432    function pthread_setschedparam
 433      (thread : pthread_t;
 434       policy : int;
 435       param  : access struct_sched_param) return int;
 436    pragma Import (C, pthread_setschedparam, "pthread_setschedparam");
 437
 438    function pthread_attr_setscope
 439      (attr            : access pthread_attr_t;
 440       contentionscope : int) return int;
 441    pragma Import (C, pthread_attr_setscope, "pthread_attr_setscope");
 442
 443    function pthread_attr_setinheritsched
 444      (attr            : access pthread_attr_t;
 445       inheritsched : int) return int;
 446    pragma Import
 447      (C, pthread_attr_setinheritsched, "pthread_attr_setinheritsched");
 448
 449    function pthread_attr_setschedpolicy
 450      (attr   : access pthread_attr_t;
 451       policy : int) return int;
 452    pragma Import (C, pthread_attr_setschedpolicy, "pthread_attr_setsched");
 453
 454    function sched_yield return int;
 455
 456    ---------------------------
 457    -- P1003.1c - Section 16 --
 458    ---------------------------
 459
 460    function pthread_attr_init (attributes : access pthread_attr_t) return int;
 461    pragma Import (C, pthread_attr_init, "pthread_attr_init");
 462
 463    function pthread_attr_destroy
 464      (attributes : access pthread_attr_t) return int;
 465    pragma Import (C, pthread_attr_destroy, "pthread_attr_destroy");
 466
 467    function pthread_attr_setdetachstate
 468      (attr        : access pthread_attr_t;
 469       detachstate : int) return int;
 470    pragma Import
 471      (C, pthread_attr_setdetachstate, "pthread_attr_setdetachstate");
 472
 473    function pthread_attr_setstacksize
 474      (attr      : access pthread_attr_t;
 475       stacksize : size_t) return int;
 476    pragma Import
 477      (C, pthread_attr_setstacksize, "pthread_attr_setstacksize");
 478
 479    function pthread_create
 480      (thread        : access pthread_t;
 481       attributes    : access pthread_attr_t;
 482       start_routine : Thread_Body;
 483       arg           : System.Address) return int;
 484    pragma Import (C, pthread_create, "pthread_create");
 485
 486    procedure pthread_exit (status : System.Address);
 487    pragma Import (C, pthread_exit, "pthread_exit");
 488
 489    function pthread_self return pthread_t;
 490    pragma Import (C, pthread_self, "pthread_self");
 491
 492    --------------------------
 493    -- POSIX.1c  Section 17 --
 494    --------------------------
 495
 496    function pthread_setspecific
 497      (key   : pthread_key_t;
 498       value : System.Address) return int;
 499    pragma Import (C, pthread_setspecific, "pthread_setspecific");
 500
 501    function pthread_getspecific (key : pthread_key_t) return System.Address;
 502    pragma Import (C, pthread_getspecific, "pthread_getspecific");
 503
 504    type destructor_pointer is access procedure (arg : System.Address);
 505    pragma Convention (C, destructor_pointer);
 506
 507    function pthread_key_create
 508      (key        : access pthread_key_t;
 509       destructor : destructor_pointer) return int;
 510    pragma Import (C, pthread_key_create, "pthread_key_create");
 511
 512 private
 513
 514    type sigset_t is new unsigned;
 515
 516    type int32_t is new int;
 517
 518    type pid_t is new int32_t;
 519
 520    type time_t is new long;
 521
 522    type timespec is record
 523       tv_sec  : time_t;
 524       tv_nsec : long;
 525    end record;
 526    pragma Convention (C, timespec);
 527
 528    type clockid_t is new int;
 529    CLOCK_REALTIME : constant clockid_t := 0;
 530
 531    type struct_timeval is record
 532       tv_sec  : time_t;
 533       tv_usec : int32_t;
 534    end record;
 535    pragma Convention (C, struct_timeval);
 536
 537    --
 538    --  Darwin specific signal implementation
 539    --
 540    type Pad_Type is array (1 .. 7) of unsigned_long;
 541    type siginfo_t is record
 542       si_signo  : int;               --  signal number
 543       si_errno  : int;               --  errno association
 544       si_code   : int;               --  signal code
 545       si_pid    : int;               --  sending process
 546       si_uid    : unsigned;          --  sender's ruid
 547       si_status : int;               --  exit value
 548       si_addr   : System.Address;    --  faulting instruction
 549       si_value  : System.Address;    --  signal value
 550       si_band   : long;              --  band event for SIGPOLL
 551       pad       : Pad_Type;          --  RFU
 552    end record;
 553    pragma Convention (C, siginfo_t);
 554
 555    type mcontext_t is new System.Address;
 556
 557    type ucontext_t is record
 558       uc_onstack  : int;
 559       uc_sigmask  : sigset_t;         --  Signal Mask Used By This Context
 560       uc_stack    : stack_t;          --  Stack Used By This Context
 561       uc_link     : System.Address;   --  Pointer To Resuming Context
 562       uc_mcsize   : size_t;           --  Size of The Machine Context
 563       uc_mcontext : mcontext_t;       --  Machine Specific Context
 564    end record;
 565    pragma Convention (C, ucontext_t);
 566
 567    --
 568    --  Darwin specific pthread implementation
 569    --
 570    type pthread_t is new System.Address;
 571
 572    type pthread_attr_t is record
 573       sig    : long;
 574       opaque : padding (1 .. System.OS_Constants.PTHREAD_ATTR_SIZE);
 575    end record;
 576    pragma Convention (C, pthread_attr_t);
 577
 578    type pthread_mutexattr_t is record
 579       sig    : long;
 580       opaque : padding (1 .. System.OS_Constants.PTHREAD_MUTEXATTR_SIZE);
 581    end record;
 582    pragma Convention (C, pthread_mutexattr_t);
 583
 584    type pthread_mutex_t is record
 585       sig    : long;
 586       opaque : padding (1 .. System.OS_Constants.PTHREAD_MUTEX_SIZE);
 587    end record;
 588    pragma Convention (C, pthread_mutex_t);
 589
 590    type pthread_condattr_t is record
 591       sig    : long;
 592       opaque : padding (1 .. System.OS_Constants.PTHREAD_CONDATTR_SIZE);
 593    end record;
 594    pragma Convention (C, pthread_condattr_t);
 595
 596    type pthread_cond_t is record
 597       sig    : long;
 598       opaque : padding (1 .. System.OS_Constants.PTHREAD_COND_SIZE);
 599    end record;
 600    pragma Convention (C, pthread_cond_t);
 601
 602    type pthread_once_t is record
 603       sig    : long;
 604       opaque : padding (1 .. System.OS_Constants.PTHREAD_ONCE_SIZE);
 605    end record;
 606    pragma Convention (C, pthread_once_t);
 607
 608    type pthread_key_t is new unsigned_long;
 609
 610 end System.OS_Interface;