gcc/ada/s-osinte-aix.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) 1995-2014, 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 a AIX (Native THREADS) version of this package
  34
  35 --  This package encapsulates all direct interfaces to OS services that are
  36 --  needed by the tasking run-time (libgnarl).
  37
  38 --  PLEASE DO NOT add any with-clauses to this package or remove the pragma
  39 --  Preelaborate. This package is designed to be a bottom-level (leaf) package.
  40
  41 with Ada.Unchecked_Conversion;
  42
  43 with Interfaces.C;
  44 with Interfaces.C.Extensions;
  45
  46 package System.OS_Interface is
  47    pragma Preelaborate;
  48
  49    pragma Linker_Options ("-pthread");
  50    --  This implies -lpthreads + other things depending on the GCC
  51    --  configuration, such as the selection of a proper libgcc variant
  52    --  for table-based exception handling when it is available.
  53
  54    pragma Linker_Options ("-lc_r");
  55
  56    subtype int            is Interfaces.C.int;
  57    subtype short          is Interfaces.C.short;
  58    subtype long           is Interfaces.C.long;
  59    subtype long_long      is Interfaces.C.Extensions.long_long;
  60    subtype unsigned       is Interfaces.C.unsigned;
  61    subtype unsigned_short is Interfaces.C.unsigned_short;
  62    subtype unsigned_long  is Interfaces.C.unsigned_long;
  63    subtype unsigned_char  is Interfaces.C.unsigned_char;
  64    subtype plain_char     is Interfaces.C.plain_char;
  65    subtype size_t         is Interfaces.C.size_t;
  66
  67    -----------
  68    -- Errno --
  69    -----------
  70
  71    function errno return int;
  72    pragma Import (C, errno, "__get_errno");
  73
  74    EAGAIN    : constant := 11;
  75    EINTR     : constant := 4;
  76    EINVAL    : constant := 22;
  77    ENOMEM    : constant := 12;
  78    ETIMEDOUT : constant := 78;
  79
  80    -------------
  81    -- Signals --
  82    -------------
  83
  84    Max_Interrupt : constant := 63;
  85    type Signal is new int range 0 .. Max_Interrupt;
  86    for Signal'Size use int'Size;
  87
  88    SIGHUP      : constant := 1; --  hangup
  89    SIGINT      : constant := 2; --  interrupt (rubout)
  90    SIGQUIT     : constant := 3; --  quit (ASCD FS)
  91    SIGILL      : constant := 4; --  illegal instruction (not reset)
  92    SIGTRAP     : constant := 5; --  trace trap (not reset)
  93    SIGIOT      : constant := 6; --  IOT instruction
  94    SIGABRT     : constant := 6; --  used by abort, replace SIGIOT in the future
  95    SIGEMT      : constant := 7; --  EMT instruction
  96    SIGFPE      : constant := 8; --  floating point exception
  97    SIGKILL     : constant := 9; --  kill (cannot be caught or ignored)
  98    SIGBUS      : constant := 10; --  bus error
  99    SIGSEGV     : constant := 11; --  segmentation violation
 100    SIGSYS      : constant := 12; --  bad argument to system call
 101    SIGPIPE     : constant := 13; --  write on a pipe with no one to read it
 102    SIGALRM     : constant := 14; --  alarm clock
 103    SIGTERM     : constant := 15; --  software termination signal from kill
 104    SIGUSR1     : constant := 30; --  user defined signal 1
 105    SIGUSR2     : constant := 31; --  user defined signal 2
 106    SIGCLD      : constant := 20; --  alias for SIGCHLD
 107    SIGCHLD     : constant := 20; --  child status change
 108    SIGPWR      : constant := 29; --  power-fail restart
 109    SIGWINCH    : constant := 28; --  window size change
 110    SIGURG      : constant := 16; --  urgent condition on IO channel
 111    SIGPOLL     : constant := 23; --  pollable event occurred
 112    SIGIO       : constant := 23; --  I/O possible (Solaris SIGPOLL alias)
 113    SIGSTOP     : constant := 17; --  stop (cannot be caught or ignored)
 114    SIGTSTP     : constant := 18; --  user stop requested from tty
 115    SIGCONT     : constant := 19; --  stopped process has been continued
 116    SIGTTIN     : constant := 21; --  background tty read attempted
 117    SIGTTOU     : constant := 22; --  background tty write attempted
 118    SIGVTALRM   : constant := 34; --  virtual timer expired
 119    SIGPROF     : constant := 32; --  profiling timer expired
 120    SIGXCPU     : constant := 24; --  CPU time limit exceeded
 121    SIGXFSZ     : constant := 25; --  filesize limit exceeded
 122    SIGWAITING  : constant := 39; --  m:n scheduling
 123
 124    --  The following signals are AIX specific
 125
 126    SIGMSG      : constant := 27; -- input data is in the ring buffer
 127    SIGDANGER   : constant := 33; -- system crash imminent
 128    SIGMIGRATE  : constant := 35; -- migrate process
 129    SIGPRE      : constant := 36; -- programming exception
 130    SIGVIRT     : constant := 37; -- AIX virtual time alarm
 131    SIGALRM1    : constant := 38; -- m:n condition variables
 132    SIGCPUFAIL  : constant := 59; -- Predictive De-configuration of Processors
 133    SIGKAP      : constant := 60; -- keep alive poll from native keyboard
 134    SIGGRANT    : constant := SIGKAP; -- monitor mode granted
 135    SIGRETRACT  : constant := 61; -- monitor mode should be relinquished
 136    SIGSOUND    : constant := 62; -- sound control has completed
 137    SIGSAK      : constant := 63; -- secure attention key
 138
 139    SIGADAABORT : constant := SIGEMT;
 140    --  Note: on other targets, we usually use SIGABRT, but on AIX, it appears
 141    --  that SIGABRT can't be used in sigwait(), so we use SIGEMT.
 142    --  SIGEMT is "Emulator Trap Instruction" from the PDP-11, and does not
 143    --  have a standardized usage.
 144
 145    type Signal_Set is array (Natural range <>) of Signal;
 146
 147    Unmasked : constant Signal_Set :=
 148                 (SIGTRAP, SIGTTIN, SIGTTOU, SIGTSTP, SIGPROF);
 149    Reserved : constant Signal_Set :=
 150                 (SIGABRT, SIGKILL, SIGSTOP, SIGALRM1, SIGWAITING, SIGCPUFAIL);
 151
 152    type sigset_t is private;
 153
 154    function sigaddset (set : access sigset_t; sig : Signal) return int;
 155    pragma Import (C, sigaddset, "sigaddset");
 156
 157    function sigdelset (set : access sigset_t; sig : Signal) return int;
 158    pragma Import (C, sigdelset, "sigdelset");
 159
 160    function sigfillset (set : access sigset_t) return int;
 161    pragma Import (C, sigfillset, "sigfillset");
 162
 163    function sigismember (set : access sigset_t; sig : Signal) return int;
 164    pragma Import (C, sigismember, "sigismember");
 165
 166    function sigemptyset (set : access sigset_t) return int;
 167    pragma Import (C, sigemptyset, "sigemptyset");
 168
 169    type struct_sigaction is record
 170       sa_handler : System.Address;
 171       sa_mask    : sigset_t;
 172       sa_flags   : int;
 173    end record;
 174    pragma Convention (C, struct_sigaction);
 175    type struct_sigaction_ptr is access all struct_sigaction;
 176
 177    SA_SIGINFO : constant := 16#0100#;
 178    SA_ONSTACK : constant := 16#0001#;
 179
 180    SIG_BLOCK   : constant := 0;
 181    SIG_UNBLOCK : constant := 1;
 182    SIG_SETMASK : constant := 2;
 183
 184    SIG_DFL : constant := 0;
 185    SIG_IGN : constant := 1;
 186
 187    function sigaction
 188      (sig  : Signal;
 189       act  : struct_sigaction_ptr;
 190       oact : struct_sigaction_ptr) return int;
 191    pragma Import (C, sigaction, "sigaction");
 192
 193    ----------
 194    -- Time --
 195    ----------
 196
 197    Time_Slice_Supported : constant Boolean := True;
 198    --  Indicates whether time slicing is supported
 199
 200    type timespec is private;
 201
 202    type clockid_t is new long_long;
 203
 204    function clock_gettime
 205      (clock_id : clockid_t;
 206       tp       : access timespec) return int;
 207    pragma Import (C, clock_gettime, "clock_gettime");
 208
 209    function clock_getres
 210      (clock_id : clockid_t;
 211       res      : access timespec) return int;
 212    pragma Import (C, clock_getres, "clock_getres");
 213
 214    function To_Duration (TS : timespec) return Duration;
 215    pragma Inline (To_Duration);
 216
 217    function To_Timespec (D : Duration) return timespec;
 218    pragma Inline (To_Timespec);
 219
 220    type struct_timezone is record
 221       tz_minuteswest : int;
 222       tz_dsttime     : int;
 223    end record;
 224    pragma Convention (C, struct_timezone);
 225    type struct_timezone_ptr is access all struct_timezone;
 226
 227    -------------------------
 228    -- Priority Scheduling --
 229    -------------------------
 230
 231    SCHED_FIFO  : constant := 1;
 232    SCHED_RR    : constant := 2;
 233    SCHED_OTHER : constant := 0;
 234
 235    function To_Target_Priority
 236      (Prio : System.Any_Priority) return Interfaces.C.int;
 237    --  Maps System.Any_Priority to a POSIX priority
 238
 239    -------------
 240    -- Process --
 241    -------------
 242
 243    type pid_t is private;
 244
 245    function kill (pid : pid_t; sig : Signal) return int;
 246    pragma Import (C, kill, "kill");
 247
 248    function getpid return pid_t;
 249    pragma Import (C, getpid, "getpid");
 250
 251    ---------
 252    -- LWP --
 253    ---------
 254
 255    function lwp_self return System.Address;
 256    pragma Import (C, lwp_self, "thread_self");
 257
 258    -------------
 259    -- Threads --
 260    -------------
 261
 262    type Thread_Body is access
 263      function (arg : System.Address) return System.Address;
 264    pragma Convention (C, Thread_Body);
 265
 266    function Thread_Body_Access is new
 267      Ada.Unchecked_Conversion (System.Address, Thread_Body);
 268
 269    type pthread_t           is private;
 270    subtype Thread_Id        is pthread_t;
 271
 272    type pthread_mutex_t     is limited private;
 273    type pthread_cond_t      is limited private;
 274    type pthread_attr_t      is limited private;
 275    type pthread_mutexattr_t is limited private;
 276    type pthread_condattr_t  is limited private;
 277    type pthread_key_t       is private;
 278
 279    PTHREAD_CREATE_DETACHED : constant := 1;
 280
 281    PTHREAD_SCOPE_PROCESS : constant := 1;
 282    PTHREAD_SCOPE_SYSTEM  : constant := 0;
 283
 284    --  Read/Write lock not supported on AIX. To add support both types
 285    --  pthread_rwlock_t and pthread_rwlockattr_t must properly be defined
 286    --  with the associated routines pthread_rwlock_[init/destroy] and
 287    --  pthread_rwlock_[rdlock/wrlock/unlock].
 288
 289    subtype pthread_rwlock_t     is pthread_mutex_t;
 290    subtype pthread_rwlockattr_t is pthread_mutexattr_t;
 291
 292    -----------
 293    -- Stack --
 294    -----------
 295
 296    type stack_t is record
 297       ss_sp    : System.Address;
 298       ss_size  : size_t;
 299       ss_flags : int;
 300    end record;
 301    pragma Convention (C, stack_t);
 302
 303    function sigaltstack
 304      (ss  : not null access stack_t;
 305       oss : access stack_t) return int;
 306    pragma Import (C, sigaltstack, "sigaltstack");
 307
 308    Alternate_Stack : aliased System.Address;
 309    --  This is a dummy definition, never used (Alternate_Stack_Size is null)
 310
 311    Alternate_Stack_Size : constant := 0;
 312    --  No alternate signal stack is used on this platform
 313
 314    Stack_Base_Available : constant Boolean := False;
 315    --  Indicates whether the stack base is available on this target
 316
 317    function Get_Stack_Base (thread : pthread_t) return Address;
 318    pragma Inline (Get_Stack_Base);
 319    --  Returns the stack base of the specified thread. Only call this function
 320    --  when Stack_Base_Available is True.
 321
 322    function Get_Page_Size return size_t;
 323    function Get_Page_Size return Address;
 324    pragma Import (C, Get_Page_Size, "getpagesize");
 325    --  Returns the size of a page
 326
 327    PROT_NONE  : constant := 0;
 328    PROT_READ  : constant := 1;
 329    PROT_WRITE : constant := 2;
 330    PROT_EXEC  : constant := 4;
 331    PROT_ALL   : constant := PROT_READ + PROT_WRITE + PROT_EXEC;
 332    PROT_ON    : constant := PROT_READ;
 333    PROT_OFF   : constant := PROT_ALL;
 334
 335    function mprotect (addr : Address; len : size_t; prot : int) return int;
 336    pragma Import (C, mprotect);
 337
 338    ---------------------------------------
 339    -- Nonstandard Thread Initialization --
 340    ---------------------------------------
 341
 342    --  Though not documented, pthread_init *must* be called before any other
 343    --  pthread call.
 344
 345    procedure pthread_init;
 346    pragma Import (C, pthread_init, "pthread_init");
 347
 348    -------------------------
 349    -- POSIX.1c  Section 3 --
 350    -------------------------
 351
 352    function sigwait
 353      (set : access sigset_t;
 354       sig : access Signal) return int;
 355    pragma Import (C, sigwait, "sigwait");
 356
 357    function pthread_kill
 358      (thread : pthread_t;
 359       sig    : Signal) return int;
 360    pragma Import (C, pthread_kill, "pthread_kill");
 361
 362    function pthread_sigmask
 363      (how  : int;
 364       set  : access sigset_t;
 365       oset : access sigset_t) return int;
 366    pragma Import (C, pthread_sigmask, "sigthreadmask");
 367
 368    --------------------------
 369    -- POSIX.1c  Section 11 --
 370    --------------------------
 371
 372    function pthread_mutexattr_init
 373      (attr : access pthread_mutexattr_t) return int;
 374    pragma Import (C, pthread_mutexattr_init, "pthread_mutexattr_init");
 375
 376    function pthread_mutexattr_destroy
 377      (attr : access pthread_mutexattr_t) return int;
 378    pragma Import (C, pthread_mutexattr_destroy, "pthread_mutexattr_destroy");
 379
 380    function pthread_mutex_init
 381      (mutex : access pthread_mutex_t;
 382       attr  : access pthread_mutexattr_t) return int;
 383    pragma Import (C, pthread_mutex_init, "pthread_mutex_init");
 384
 385    function pthread_mutex_destroy (mutex : access pthread_mutex_t) return int;
 386    pragma Import (C, pthread_mutex_destroy, "pthread_mutex_destroy");
 387
 388    function pthread_mutex_lock (mutex : access pthread_mutex_t) return int;
 389    pragma Import (C, pthread_mutex_lock, "pthread_mutex_lock");
 390
 391    function pthread_mutex_unlock (mutex : access pthread_mutex_t) return int;
 392    pragma Import (C, pthread_mutex_unlock, "pthread_mutex_unlock");
 393
 394    function pthread_condattr_init
 395      (attr : access pthread_condattr_t) return int;
 396    pragma Import (C, pthread_condattr_init, "pthread_condattr_init");
 397
 398    function pthread_condattr_destroy
 399      (attr : access pthread_condattr_t) return int;
 400    pragma Import (C, pthread_condattr_destroy, "pthread_condattr_destroy");
 401
 402    function pthread_cond_init
 403      (cond : access pthread_cond_t;
 404       attr : access pthread_condattr_t) return int;
 405    pragma Import (C, pthread_cond_init, "pthread_cond_init");
 406
 407    function pthread_cond_destroy (cond : access pthread_cond_t) return int;
 408    pragma Import (C, pthread_cond_destroy, "pthread_cond_destroy");
 409
 410    function pthread_cond_signal (cond : access pthread_cond_t) return int;
 411    pragma Import (C, pthread_cond_signal, "pthread_cond_signal");
 412
 413    function pthread_cond_wait
 414      (cond  : access pthread_cond_t;
 415       mutex : access pthread_mutex_t) return int;
 416    pragma Import (C, pthread_cond_wait, "pthread_cond_wait");
 417
 418    function pthread_cond_timedwait
 419      (cond    : access pthread_cond_t;
 420       mutex   : access pthread_mutex_t;
 421       abstime : access timespec) return int;
 422    pragma Import (C, pthread_cond_timedwait, "pthread_cond_timedwait");
 423
 424    Relative_Timed_Wait : constant Boolean := False;
 425    --  pthread_cond_timedwait requires an absolute delay time
 426
 427    --------------------------
 428    -- POSIX.1c  Section 13 --
 429    --------------------------
 430
 431    PTHREAD_PRIO_PROTECT : constant := 2;
 432
 433    function PTHREAD_PRIO_INHERIT return int;
 434    --  Return value of C macro PTHREAD_PRIO_INHERIT. This function is needed
 435    --  since the value is different between AIX versions.
 436
 437    function pthread_mutexattr_setprotocol
 438      (attr     : access pthread_mutexattr_t;
 439       protocol : int) return int;
 440    pragma Import (C, pthread_mutexattr_setprotocol);
 441
 442    function pthread_mutexattr_setprioceiling
 443      (attr        : access pthread_mutexattr_t;
 444       prioceiling : int) return int;
 445    pragma Import (C, pthread_mutexattr_setprioceiling);
 446
 447    type Array_5_Int is array (0 .. 5) of int;
 448    type struct_sched_param is record
 449       sched_priority : int;
 450       sched_policy   : int;
 451       sched_reserved : Array_5_Int;
 452    end record;
 453
 454    function pthread_setschedparam
 455      (thread : pthread_t;
 456       policy : int;
 457       param  : access struct_sched_param) return int;
 458    pragma Import (C, pthread_setschedparam, "pthread_setschedparam");
 459
 460    function pthread_attr_setscope
 461      (attr            : access pthread_attr_t;
 462       contentionscope : int) return int;
 463    pragma Import (C, pthread_attr_setscope, "pthread_attr_setscope");
 464
 465    function pthread_attr_setinheritsched
 466      (attr            : access pthread_attr_t;
 467       inheritsched : int) return int;
 468    pragma Import (C, pthread_attr_setinheritsched);
 469
 470    function pthread_attr_setschedpolicy
 471      (attr   : access pthread_attr_t;
 472       policy : int) return int;
 473    pragma Import (C, pthread_attr_setschedpolicy);
 474
 475    function pthread_attr_setschedparam
 476      (attr        : access pthread_attr_t;
 477       sched_param : int) return int;
 478    pragma Import (C, pthread_attr_setschedparam);
 479
 480    function sched_yield return int;
 481    --  AIX have a nonstandard sched_yield
 482
 483    --------------------------
 484    -- P1003.1c  Section 16 --
 485    --------------------------
 486
 487    function pthread_attr_init (attributes : access pthread_attr_t) return int;
 488    pragma Import (C, pthread_attr_init, "pthread_attr_init");
 489
 490    function pthread_attr_destroy
 491      (attributes : access pthread_attr_t) return int;
 492    pragma Import (C, pthread_attr_destroy, "pthread_attr_destroy");
 493
 494    function pthread_attr_setdetachstate
 495      (attr        : access pthread_attr_t;
 496       detachstate : int) return int;
 497    pragma Import (C, pthread_attr_setdetachstate);
 498
 499    function pthread_attr_setstacksize
 500      (attr      : access pthread_attr_t;
 501       stacksize : size_t) return int;
 502    pragma Import (C, pthread_attr_setstacksize);
 503
 504    function pthread_create
 505      (thread        : access pthread_t;
 506       attributes    : access pthread_attr_t;
 507       start_routine : Thread_Body;
 508       arg           : System.Address)
 509      return int;
 510    pragma Import (C, pthread_create, "pthread_create");
 511
 512    procedure pthread_exit (status : System.Address);
 513    pragma Import (C, pthread_exit, "pthread_exit");
 514
 515    function pthread_self return pthread_t;
 516    pragma Import (C, pthread_self, "pthread_self");
 517
 518    --------------------------
 519    -- POSIX.1c  Section 17 --
 520    --------------------------
 521
 522    function pthread_setspecific
 523      (key   : pthread_key_t;
 524       value : System.Address) return int;
 525    pragma Import (C, pthread_setspecific, "pthread_setspecific");
 526
 527    function pthread_getspecific (key : pthread_key_t) return System.Address;
 528    pragma Import (C, pthread_getspecific, "pthread_getspecific");
 529
 530    type destructor_pointer is access procedure (arg : System.Address);
 531    pragma Convention (C, destructor_pointer);
 532
 533    function pthread_key_create
 534      (key        : access pthread_key_t;
 535       destructor : destructor_pointer) return int;
 536    pragma Import (C, pthread_key_create, "pthread_key_create");
 537
 538 private
 539    type sigset_t is record
 540       losigs : unsigned_long;
 541       hisigs : unsigned_long;
 542    end record;
 543    pragma Convention (C_Pass_By_Copy, sigset_t);
 544
 545    type pid_t is new int;
 546
 547    type time_t is new long;
 548
 549    type timespec is record
 550       tv_sec  : time_t;
 551       tv_nsec : long;
 552    end record;
 553    pragma Convention (C, timespec);
 554
 555    type pthread_attr_t is new System.Address;
 556    pragma Convention (C, pthread_attr_t);
 557    --  typedef struct __pt_attr        *pthread_attr_t;
 558
 559    type pthread_condattr_t is new System.Address;
 560    pragma Convention (C, pthread_condattr_t);
 561    --  typedef struct __pt_attr        *pthread_condattr_t;
 562
 563    type pthread_mutexattr_t is new System.Address;
 564    pragma Convention (C, pthread_mutexattr_t);
 565    --  typedef struct __pt_attr        *pthread_mutexattr_t;
 566
 567    type pthread_t is new System.Address;
 568    pragma Convention (C, pthread_t);
 569    --  typedef void    *pthread_t;
 570
 571    type ptq_queue;
 572    type ptq_queue_ptr is access all ptq_queue;
 573
 574    type ptq_queue is record
 575       ptq_next : ptq_queue_ptr;
 576       ptq_prev : ptq_queue_ptr;
 577    end record;
 578
 579    type Array_3_Int is array (0 .. 3) of int;
 580    type pthread_mutex_t is record
 581         link        : ptq_queue;
 582         ptmtx_lock  : int;
 583         ptmtx_flags : long;
 584         protocol    : int;
 585         prioceiling : int;
 586         ptmtx_owner : pthread_t;
 587         mtx_id      : int;
 588         attr        : pthread_attr_t;
 589         mtx_kind    : int;
 590         lock_cpt    : int;
 591         reserved    : Array_3_Int;
 592    end record;
 593    pragma Convention (C, pthread_mutex_t);
 594    type pthread_mutex_t_ptr is access pthread_mutex_t;
 595
 596    type pthread_cond_t is record
 597       link         : ptq_queue;
 598       ptcv_lock    : int;
 599       ptcv_flags   : long;
 600       ptcv_waiters : ptq_queue;
 601       cv_id        : int;
 602       attr         : pthread_attr_t;
 603       mutex        : pthread_mutex_t_ptr;
 604       cptwait      : int;
 605       reserved     : int;
 606    end record;
 607    pragma Convention (C, pthread_cond_t);
 608
 609    type pthread_key_t is new unsigned;
 610
 611 end System.OS_Interface;