gcc/ada/5tosinte.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 --             Copyright (C) 1991-1994, Florida State University            --
  10 --             Copyright (C) 1995-2004, 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,  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.       --
  31 -- Extensive contributions were provided by Ada Core Technologies, Inc.     --
  32 --                                                                          --
  33 ------------------------------------------------------------------------------
  34
  35 --  This is a Solaris (FSU THREADS) version of this package
  36
  37 --  This package includes 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 := 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; --  used for thread cancel (Solaris)
 122    SIGRTMIN   : constant := 38; --  first (highest-priority) realtime signal
 123    SIGRTMAX   : constant := 45; --  last (lowest-priority) realtime signal
 124
 125    type Signal_Set is array (Natural range <>) of Signal;
 126
 127    Unmasked    : constant Signal_Set :=
 128      (SIGTRAP, SIGLWP, SIGTTIN, SIGTTOU, SIGTSTP, SIGPROF);
 129
 130    Reserved    : constant Signal_Set :=
 131      (SIGKILL, SIGSTOP, SIGALRM, SIGVTALRM, SIGWAITING, SIGRTMAX);
 132
 133    type sigset_t is private;
 134
 135    function sigaddset (set : access sigset_t; sig : Signal) return int;
 136    pragma Import (C, sigaddset, "sigaddset");
 137
 138    function sigdelset (set : access sigset_t; sig : Signal) return int;
 139    pragma Import (C, sigdelset, "sigdelset");
 140
 141    function sigfillset (set : access sigset_t) return int;
 142    pragma Import (C, sigfillset, "sigfillset");
 143
 144    function sigismember (set : access sigset_t; sig : Signal) return int;
 145    pragma Import (C, sigismember, "sigismember");
 146
 147    function sigemptyset (set : access sigset_t) return int;
 148    pragma Import (C, sigemptyset, "sigemptyset");
 149
 150    type union_type_3 is new String (1 .. 116);
 151    type siginfo_t is record
 152       si_signo     : int;
 153       si_code      : int;
 154       si_errno     : int;
 155       X_data       : union_type_3;
 156    end record;
 157    pragma Convention (C, siginfo_t);
 158
 159    --  The types mcontext_t and gregset_t are part of the ucontext_t
 160    --  information, which is specific to Solaris2.4 for SPARC
 161    --  The ucontext_t info seems to be used by the handler
 162    --  for SIGSEGV to decide whether it is a Storage_Error (stack overflow) or
 163    --  a Constraint_Error (bad pointer).  The original code that did this
 164    --  is suspect, so it is not clear whether we really need this part of
 165    --  the signal context information, or perhaps something else.
 166    --  More analysis is needed, after which these declarations may need to
 167    --  be changed.
 168
 169    EMT_TAGOVF  : constant := 1; --  tag overflow
 170    FPE_INTDIV  : constant := 1; --  integer divide by zero
 171    FPE_INTOVF  : constant := 2; --  integer overflow
 172    FPE_FLTDIV  : constant := 3; --  floating point divide by zero
 173    FPE_FLTOVF  : constant := 4; --  floating point overflow
 174    FPE_FLTUND  : constant := 5; --  floating point underflow
 175    FPE_FLTRES  : constant := 6; --  floating point inexact result
 176    FPE_FLTINV  : constant := 7; --  invalid floating point operation
 177    FPE_FLTSUB  : constant := 8; --  subscript out of range
 178
 179    SEGV_MAPERR : constant := 1; --  address not mapped to object
 180    SEGV_ACCERR : constant := 2; --  invalid permissions
 181
 182    BUS_ADRALN  : constant := 1; --  invalid address alignment
 183    BUS_ADRERR  : constant := 2; --  non-existent physical address
 184    BUS_OBJERR  : constant := 3; --  object specific hardware error
 185
 186    ILL_ILLOPC  : constant := 1; --  illegal opcode
 187    ILL_ILLOPN  : constant := 2; --  illegal operand
 188    ILL_ILLADR  : constant := 3; --  illegal addressing mode
 189    ILL_ILLTRP  : constant := 4; --  illegal trap
 190    ILL_PRVOPC  : constant := 5; --  privileged opcode
 191    ILL_PRVREG  : constant := 6; --  privileged register
 192    ILL_COPROC  : constant := 7; --  co-processor
 193    ILL_BADSTK  : constant := 8; --  bad stack
 194
 195    type greg_t is new int;
 196
 197    type gregset_t is array (Integer range 0 .. 18) of greg_t;
 198
 199    REG_O0 : constant := 11;
 200    --  index of saved register O0 in ucontext.uc_mcontext.gregs array
 201
 202    type union_type_2 is new String (1 .. 128);
 203    type record_type_1 is record
 204       fpu_fr       : union_type_2;
 205       fpu_q        : System.Address;
 206       fpu_fsr      : unsigned;
 207       fpu_qcnt     : unsigned_char;
 208       fpu_q_entrysize  : unsigned_char;
 209       fpu_en       : unsigned_char;
 210    end record;
 211    pragma Convention (C, record_type_1);
 212    type array_type_7 is array (Integer range 0 .. 20) of long;
 213    type mcontext_t is record
 214       gregs        : gregset_t;
 215       gwins        : System.Address;
 216       fpregs       : record_type_1;
 217       filler       : array_type_7;
 218    end record;
 219    pragma Convention (C, mcontext_t);
 220
 221    type record_type_2 is record
 222       ss_sp        : System.Address;
 223       ss_size      : int;
 224       ss_flags     : int;
 225    end record;
 226    pragma Convention (C, record_type_2);
 227    type array_type_8 is array (Integer range 0 .. 22) of long;
 228    type ucontext_t is record
 229       uc_flags     : unsigned_long;
 230       uc_link      : System.Address;
 231       uc_sigmask   : sigset_t;
 232       uc_stack     : record_type_2;
 233       uc_mcontext  : mcontext_t;
 234       uc_filler    : array_type_8;
 235    end record;
 236    pragma Convention (C, ucontext_t);
 237
 238    type Signal_Handler is access procedure
 239       (signo   : Signal;
 240        info    : access siginfo_t;
 241        context : access ucontext_t);
 242
 243    type union_type_1 is new plain_char;
 244    type array_type_2 is array (Integer range 0 .. 1) of int;
 245    type struct_sigaction is record
 246       sa_flags     : int;
 247       sa_handler   : System.Address;
 248       sa_mask      : sigset_t;
 249       sa_resv      : array_type_2;
 250    end record;
 251    pragma Convention (C, struct_sigaction);
 252    type struct_sigaction_ptr is access all struct_sigaction;
 253
 254    SA_SIGINFO  : constant := 16#08#;
 255
 256    SIG_BLOCK   : constant := 1;
 257    SIG_UNBLOCK : constant := 2;
 258    SIG_SETMASK : constant := 3;
 259
 260    SIG_DFL : constant := 0;
 261    SIG_IGN : constant := 1;
 262
 263    function sigaction
 264      (sig  : Signal;
 265       act  : struct_sigaction_ptr;
 266       oact : struct_sigaction_ptr) return int;
 267    pragma Import (C, sigaction, "sigaction");
 268
 269    ----------
 270    -- Time --
 271    ----------
 272
 273    Time_Slice_Supported : constant Boolean := False;
 274    --  Indicates wether time slicing is supported (i.e FSU threads have been
 275    --  compiled with DEF_RR)
 276
 277    type timespec is private;
 278
 279    type clockid_t is private;
 280
 281    CLOCK_REALTIME : constant clockid_t;
 282
 283    function clock_gettime
 284      (clock_id : clockid_t;
 285       tp       : access timespec) return int;
 286    pragma Import (C, clock_gettime, "clock_gettime");
 287
 288    function To_Duration (TS : timespec) return Duration;
 289    pragma Inline (To_Duration);
 290
 291    function To_Timespec (D : Duration) return timespec;
 292    pragma Inline (To_Timespec);
 293
 294    type struct_timeval is private;
 295
 296    function To_Duration (TV : struct_timeval) return Duration;
 297    pragma Inline (To_Duration);
 298
 299    function To_Timeval (D : Duration) return struct_timeval;
 300    pragma Inline (To_Timeval);
 301
 302    -------------------------
 303    -- Priority Scheduling --
 304    -------------------------
 305
 306    SCHED_FIFO  : constant := 0;
 307    SCHED_RR    : constant := 1;
 308    SCHED_OTHER : constant := 2;
 309
 310    -------------
 311    -- Process --
 312    -------------
 313
 314    type pid_t is private;
 315
 316    function kill (pid : pid_t; sig : Signal) return int;
 317    pragma Import (C, kill, "kill");
 318
 319    function getpid return pid_t;
 320    pragma Import (C, getpid, "getpid");
 321
 322    ---------
 323    -- LWP --
 324    ---------
 325
 326    function lwp_self return System.Address;
 327    --  lwp_self does not exist on this thread library, revert to pthread_self
 328    --  which is the closest approximation (with getpid). This function is
 329    --  needed to share 7staprop.adb across POSIX-like targets.
 330    pragma Import (C, lwp_self, "pthread_self");
 331
 332    -------------
 333    -- Threads --
 334    -------------
 335
 336    type Thread_Body is access
 337      function (arg : System.Address) return System.Address;
 338
 339    function Thread_Body_Access is new
 340      Unchecked_Conversion (System.Address, Thread_Body);
 341
 342    type pthread_t           is private;
 343    subtype Thread_Id        is pthread_t;
 344
 345    type pthread_mutex_t     is limited private;
 346    type pthread_cond_t      is limited private;
 347    type pthread_attr_t      is limited private;
 348    type pthread_mutexattr_t is limited private;
 349    type pthread_condattr_t  is limited private;
 350    type pthread_key_t       is private;
 351
 352    PTHREAD_CREATE_DETACHED : constant := 1;
 353
 354    -----------
 355    -- Stack --
 356    -----------
 357
 358    Stack_Base_Available : constant Boolean := False;
 359    --  Indicates wether the stack base is available on this target.
 360    --  This allows us to share s-osinte.adb between all the FSU run time.
 361    --  Note that this value can only be true if pthread_t has a complete
 362    --  definition that corresponds exactly to the C header files.
 363
 364    function Get_Stack_Base (thread : pthread_t) return Address;
 365    pragma Inline (Get_Stack_Base);
 366    --  returns the stack base of the specified thread.
 367    --  Only call this function when Stack_Base_Available is True.
 368
 369    function Get_Page_Size return size_t;
 370    function Get_Page_Size return Address;
 371    pragma Import (C, Get_Page_Size, "getpagesize");
 372    --  returns the size of a page, or 0 if this is not relevant on this
 373    --  target
 374
 375    PROT_NONE  : constant := 0;
 376    PROT_READ  : constant := 1;
 377    PROT_WRITE : constant := 2;
 378    PROT_EXEC  : constant := 4;
 379    PROT_ALL   : constant := PROT_READ + PROT_WRITE + PROT_EXEC;
 380
 381    PROT_ON    : constant := PROT_NONE;
 382    PROT_OFF   : constant := PROT_ALL;
 383
 384    function mprotect (addr : Address; len : size_t; prot : int) return int;
 385    pragma Import (C, mprotect);
 386
 387    ---------------------------------------
 388    -- Nonstandard Thread Initialization --
 389    ---------------------------------------
 390
 391    procedure pthread_init;
 392    --  FSU_THREADS requires pthread_init, which is nonstandard
 393    --  and this should be invoked during the elaboration of s-taprop.adb
 394    pragma Import (C, pthread_init, "pthread_init");
 395
 396    -------------------------
 397    -- POSIX.1c  Section 3 --
 398    -------------------------
 399
 400    function sigwait (set : access sigset_t; sig : access Signal) return int;
 401    --  FSU_THREADS has a nonstandard sigwait
 402
 403    function pthread_kill (thread : pthread_t; sig : Signal) return int;
 404    pragma Import (C, pthread_kill, "pthread_kill");
 405
 406    type sigset_t_ptr is access all sigset_t;
 407
 408    function pthread_sigmask
 409      (how  : int;
 410       set  : sigset_t_ptr;
 411       oset : sigset_t_ptr) return int;
 412    pragma Import (C, pthread_sigmask, "sigprocmask");
 413
 414    --------------------------
 415    -- POSIX.1c  Section 11 --
 416    --------------------------
 417
 418    function pthread_mutexattr_init
 419      (attr : access pthread_mutexattr_t) return int;
 420    pragma Import (C, pthread_mutexattr_init, "pthread_mutexattr_init");
 421
 422    function pthread_mutexattr_destroy
 423      (attr : access pthread_mutexattr_t) return int;
 424    pragma Import (C, pthread_mutexattr_destroy, "pthread_mutexattr_destroy");
 425
 426    function pthread_mutex_init
 427      (mutex : access pthread_mutex_t;
 428       attr  : access pthread_mutexattr_t) return int;
 429    pragma Import (C, pthread_mutex_init, "pthread_mutex_init");
 430
 431    function pthread_mutex_destroy (mutex : access pthread_mutex_t) return int;
 432    pragma Import (C, pthread_mutex_destroy, "pthread_mutex_destroy");
 433
 434    function pthread_mutex_lock (mutex : access pthread_mutex_t) return int;
 435    --  FSU_THREADS has nonstandard pthread_mutex_lock
 436
 437    function pthread_mutex_unlock (mutex : access pthread_mutex_t) return int;
 438    --  FSU_THREADS has nonstandard pthread_mutex_lock
 439
 440    function pthread_condattr_init
 441      (attr : access pthread_condattr_t) return int;
 442    pragma Import (C, pthread_condattr_init, "pthread_condattr_init");
 443
 444    function pthread_condattr_destroy
 445      (attr : access pthread_condattr_t) return int;
 446    pragma Import (C, pthread_condattr_destroy, "pthread_condattr_destroy");
 447
 448    function pthread_cond_init
 449      (cond : access pthread_cond_t;
 450       attr : access pthread_condattr_t) return int;
 451    pragma Import (C, pthread_cond_init, "pthread_cond_init");
 452
 453    function pthread_cond_destroy (cond : access pthread_cond_t) return int;
 454    pragma Import (C, pthread_cond_destroy, "pthread_cond_destroy");
 455
 456    function pthread_cond_signal (cond : access pthread_cond_t) return int;
 457    pragma Import (C, pthread_cond_signal, "pthread_cond_signal");
 458
 459    function pthread_cond_wait
 460      (cond  : access pthread_cond_t;
 461       mutex : access pthread_mutex_t) return int;
 462    --  FSU_THREADS has a nonstandard pthread_cond_wait
 463
 464    function pthread_cond_timedwait
 465      (cond    : access pthread_cond_t;
 466       mutex   : access pthread_mutex_t;
 467       abstime : access timespec) return int;
 468    --  FSU_THREADS has a nonstandard pthread_cond_timedwait
 469
 470    Relative_Timed_Wait : constant Boolean := False;
 471    --  pthread_cond_timedwait requires an absolute delay time
 472
 473    --------------------------
 474    -- POSIX.1c  Section 13 --
 475    --------------------------
 476
 477    PTHREAD_PRIO_NONE    : constant := 0;
 478    PTHREAD_PRIO_PROTECT : constant := 2;
 479    PTHREAD_PRIO_INHERIT : constant := 1;
 480
 481    function pthread_mutexattr_setprotocol
 482      (attr     : access pthread_mutexattr_t;
 483       protocol : int) return int;
 484    pragma Import (C, pthread_mutexattr_setprotocol);
 485
 486    function pthread_mutexattr_setprioceiling
 487      (attr     : access pthread_mutexattr_t;
 488       prioceiling : int) return int;
 489    pragma Import
 490      (C, pthread_mutexattr_setprioceiling,
 491       "pthread_mutexattr_setprio_ceiling");
 492
 493    type struct_sched_param is record
 494       sched_priority : int;  --  scheduling priority
 495    end record;
 496
 497    function pthread_setschedparam
 498      (thread : pthread_t;
 499       policy : int;
 500       param  : access struct_sched_param) return int;
 501    --  FSU_THREADS does not have pthread_setschedparam
 502
 503    function pthread_attr_setscope
 504      (attr            : access pthread_attr_t;
 505       contentionscope : int) return int;
 506    pragma Import (C, pthread_attr_setscope, "pthread_attr_setscope");
 507
 508    function pthread_attr_setinheritsched
 509      (attr            : access pthread_attr_t;
 510       inheritsched : int) return int;
 511    pragma Import (C, pthread_attr_setinheritsched);
 512
 513    function pthread_attr_setschedpolicy
 514      (attr   : access pthread_attr_t;
 515       policy : int) return int;
 516    pragma Import (C, pthread_attr_setschedpolicy, "pthread_attr_setsched");
 517
 518    function sched_yield return int;
 519    --  FSU_THREADS does not have sched_yield;
 520
 521    ---------------------------
 522    -- P1003.1c - Section 16 --
 523    ---------------------------
 524
 525    function pthread_attr_init (attributes : access pthread_attr_t) return int;
 526    pragma Import (C, pthread_attr_init, "pthread_attr_init");
 527
 528    function pthread_attr_destroy
 529      (attributes : access pthread_attr_t) return int;
 530    pragma Import (C, pthread_attr_destroy, "pthread_attr_destroy");
 531
 532    function pthread_attr_setdetachstate
 533      (attr        : access pthread_attr_t;
 534       detachstate : int) return int;
 535    --  FSU_THREADS has a nonstandard pthread_attr_setdetachstate
 536
 537    function pthread_attr_setstacksize
 538      (attr      : access pthread_attr_t;
 539       stacksize : size_t) return int;
 540    pragma Import (C, pthread_attr_setstacksize);
 541
 542    function pthread_create
 543      (thread        : access pthread_t;
 544       attributes    : access pthread_attr_t;
 545       start_routine : Thread_Body;
 546       arg           : System.Address) return int;
 547    pragma Import (C, pthread_create, "pthread_create");
 548
 549    procedure pthread_exit (status : System.Address);
 550    pragma Import (C, pthread_exit, "pthread_exit");
 551
 552    function pthread_self return pthread_t;
 553    pragma Import (C, pthread_self, "pthread_self");
 554
 555    --------------------------
 556    -- POSIX.1c  Section 17 --
 557    --------------------------
 558
 559    function pthread_setspecific
 560      (key   : pthread_key_t;
 561       value : System.Address) return int;
 562    pragma Import (C, pthread_setspecific, "pthread_setspecific");
 563
 564    function pthread_getspecific (key : pthread_key_t) return System.Address;
 565    --  FSU_THREADS has a nonstandard pthread_getspecific
 566
 567    type destructor_pointer is access procedure (arg : System.Address);
 568
 569    function pthread_key_create
 570      (key        : access pthread_key_t;
 571       destructor : destructor_pointer) return int;
 572    pragma Import (C, pthread_key_create, "pthread_key_create");
 573
 574 private
 575
 576    type array_type_1 is array (Integer range 0 .. 3) of unsigned_long;
 577    type sigset_t is record
 578       X_X_sigbits  : array_type_1;
 579    end record;
 580    pragma Convention (C, sigset_t);
 581
 582    type pid_t is new long;
 583
 584    type time_t is new long;
 585
 586    type timespec is record
 587       tv_sec  : time_t;
 588       tv_nsec : long;
 589    end record;
 590    pragma Convention (C, timespec);
 591
 592    type clockid_t is new int;
 593    CLOCK_REALTIME : constant clockid_t := 0;
 594
 595    type struct_timeval is record
 596       tv_sec  : long;
 597       tv_usec : long;
 598    end record;
 599    pragma Convention (C, struct_timeval);
 600
 601    type pthread_attr_t is record
 602       flags           : int;
 603       stacksize       : int;
 604       contentionscope : int;
 605       inheritsched    : int;
 606       detachstate     : int;
 607       sched           : int;
 608       prio            : int;
 609       starttime       : timespec;
 610       deadline        : timespec;
 611       period          : timespec;
 612    end record;
 613    pragma Convention (C, pthread_attr_t);
 614
 615    type pthread_condattr_t is record
 616       flags : int;
 617    end record;
 618    pragma Convention (C, pthread_condattr_t);
 619
 620    type pthread_mutexattr_t is record
 621       flags        : int;
 622       prio_ceiling : int;
 623       protocol     : int;
 624    end record;
 625    pragma Convention (C, pthread_mutexattr_t);
 626
 627    type sigjmp_buf is array (Integer range 0 .. 18) of int;
 628
 629    type pthread_t_struct is record
 630       context    : sigjmp_buf;
 631       pbody      : sigjmp_buf;
 632       errno      : int;
 633       ret        : int;
 634       stack_base : System.Address;
 635    end record;
 636    pragma Convention (C, pthread_t_struct);
 637
 638    type pthread_t is access all pthread_t_struct;
 639
 640    type queue_t is record
 641       head : System.Address;
 642       tail : System.Address;
 643    end record;
 644    pragma Convention (C, queue_t);
 645
 646    type pthread_mutex_t is record
 647       queue                 : queue_t;
 648       lock                  : plain_char;
 649       owner                 : System.Address;
 650       flags                 : int;
 651       prio_ceiling          : int;
 652       protocol              : int;
 653       prev_max_ceiling_prio : int;
 654    end record;
 655    pragma Convention (C, pthread_mutex_t);
 656
 657    type pthread_cond_t is record
 658       queue        : queue_t;
 659       flags        : int;
 660       waiters      : int;
 661       mutex        : System.Address;
 662    end record;
 663    pragma Convention (C, pthread_cond_t);
 664
 665    type pthread_key_t is new int;
 666
 667 end System.OS_Interface;