gcc/ada/libgnarl/s-osinte__qnx.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) 1995-2017, Free Software Foundation, Inc.         --
  10 --                                                                          --
  11 -- GNAT is free software;  you can  redistribute it  and/or modify it under --
  12 -- terms of the  GNU General Public License as published  by the Free Soft- --
  13 -- ware  Foundation;  either version 3,  or (at your option) any later ver- --
  14 -- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
  15 -- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
  16 -- or FITNESS FOR A PARTICULAR PURPOSE.                                     --
  17 --                                                                          --
  18 -- As a special exception under Section 7 of GPL version 3, you are granted --
  19 -- additional permissions described in the GCC Runtime Library Exception,   --
  20 -- version 3.1, as published by the Free Software Foundation.               --
  21 --                                                                          --
  22 -- You should have received a copy of the GNU General Public License and    --
  23 -- a copy of the GCC Runtime Library Exception along with this program;     --
  24 -- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
  25 -- <http://www.gnu.org/licenses/>.                                          --
  26 --                                                                          --
  27 -- GNARL was developed by the GNARL team at Florida State University.       --
  28 -- Extensive contributions were provided by Ada Core Technologies, Inc.     --
  29 --                                                                          --
  30 ------------------------------------------------------------------------------
  31
  32 --  This is a QNX/Neutrino version of this package
  33
  34 --  This package encapsulates all direct interfaces to OS services
  35 --  that are needed by the tasking run-time (libgnarl).
  36
  37 --  PLEASE DO NOT add any with-clauses to this package or remove the pragma
  38 --  Preelaborate. This package is designed to be a bottom-level (leaf) package.
  39
  40 with Ada.Unchecked_Conversion;
  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 char           is Interfaces.C.char;
  49    subtype short          is Interfaces.C.short;
  50    subtype long           is Interfaces.C.long;
  51    subtype unsigned       is Interfaces.C.unsigned;
  52    subtype unsigned_short is Interfaces.C.unsigned_short;
  53    subtype unsigned_long  is Interfaces.C.unsigned_long;
  54    subtype unsigned_char  is Interfaces.C.unsigned_char;
  55    subtype plain_char     is Interfaces.C.plain_char;
  56    subtype size_t         is Interfaces.C.size_t;
  57
  58    -----------
  59    -- Errno --
  60    -----------
  61
  62    function errno return int;
  63    pragma Import (C, errno, "__get_errno");
  64
  65    EPERM     : constant := 1;
  66    EINTR     : constant := 4;
  67    EAGAIN    : constant := 11;
  68    ENOMEM    : constant := 12;
  69    EINVAL    : constant := 22;
  70    ETIMEDOUT : constant := 260;
  71
  72    -------------
  73    -- Signals --
  74    -------------
  75
  76    Max_Interrupt : constant := 64;
  77    type Signal is new int range 0 .. Max_Interrupt;
  78    for Signal'Size use int'Size;
  79
  80    SIGHUP     : constant := 1;
  81    SIGINT     : constant := 2;
  82    SIGQUIT    : constant := 3;
  83    SIGILL     : constant := 4;
  84    SIGTRAP    : constant := 5;
  85    SIGIOT     : constant := 6;
  86    SIGABRT    : constant := 6;
  87    SIGDEADLK  : constant := 7;
  88    SIGFPE     : constant := 8;
  89    SIGKILL    : constant := 9;
  90    SIGBUS     : constant := 10;
  91    SIGSEGV    : constant := 11;
  92    SIGSYS     : constant := 12;
  93    SIGPIPE    : constant := 13;
  94    SIGALRM    : constant := 14;
  95    SIGTERM    : constant := 15;
  96    SIGUSR1    : constant := 16;
  97    SIGUSR2    : constant := 17;
  98    SIGCLD     : constant := 18;
  99    SIGCHLD    : constant := 18;
 100    SIGPWR     : constant := 19;
 101    SIGWINCH   : constant := 20;
 102    SIGURG     : constant := 21;
 103    SIGPOLL    : constant := 22;
 104    SIGIO      : constant := 22;
 105    SIGSTOP    : constant := 23;
 106    SIGTSTP    : constant := 24;
 107    SIGCONT    : constant := 25;
 108    SIGTTIN    : constant := 26;
 109    SIGTTOU    : constant := 27;
 110    SIGVTALRM  : constant := 28;
 111    SIGPROF    : constant := 29;
 112    SIGXCPU    : constant := 30;
 113    SIGXFSZ    : constant := 31;
 114
 115    SIGRTMIN   : constant := 41;
 116    SITRTMAX   : constant := 56;
 117
 118    SIGSELECT  : constant := 57;
 119    SIGPHOTON  : constant := 58;
 120
 121    SIGADAABORT : constant := SIGABRT;
 122    --  Change this to use another signal for task abort. SIGTERM might be a
 123    --  good one.
 124
 125    type Signal_Set is array (Natural range <>) of Signal;
 126
 127    Unmasked : constant Signal_Set := (
 128       SIGTRAP,
 129       --  To enable debugging on multithreaded applications, mark SIGTRAP to
 130       --  be kept unmasked.
 131
 132       SIGBUS,
 133
 134       SIGTTIN, SIGTTOU, SIGTSTP,
 135       --  Keep these three signals unmasked so that background processes and IO
 136       --  behaves as normal "C" applications
 137
 138       SIGPROF,
 139       --  To avoid confusing the profiler
 140
 141       SIGKILL, SIGSTOP);
 142       --  These two signals actually can't be masked (POSIX won't allow it)
 143
 144    Reserved : constant Signal_Set := (SIGKILL, SIGSTOP, SIGSEGV);
 145
 146    type sigset_t is private;
 147
 148    function sigaddset (set : access sigset_t; sig : Signal) return int;
 149    pragma Import (C, sigaddset, "sigaddset");
 150
 151    function sigdelset (set : access sigset_t; sig : Signal) return int;
 152    pragma Import (C, sigdelset, "sigdelset");
 153
 154    function sigfillset (set : access sigset_t) return int;
 155    pragma Import (C, sigfillset, "sigfillset");
 156
 157    function sigismember (set : access sigset_t; sig : Signal) return int;
 158    pragma Import (C, sigismember, "sigismember");
 159
 160    function sigemptyset (set : access sigset_t) return int;
 161    pragma Import (C, sigemptyset, "sigemptyset");
 162
 163    type union_type_3 is new String (1 .. 116);
 164    type siginfo_t is record
 165       si_signo : int;
 166       si_code  : int;
 167       si_errno : int;
 168       X_data   : union_type_3;
 169    end record;
 170    pragma Convention (C, siginfo_t);
 171
 172    type struct_sigaction is record
 173       sa_handler  : System.Address;
 174       sa_flags    : Interfaces.C.int;
 175       sa_mask     : sigset_t;
 176    end record;
 177    pragma Convention (C, struct_sigaction);
 178
 179    type struct_sigaction_ptr is access all struct_sigaction;
 180
 181    SIG_BLOCK   : constant := 0;
 182    SIG_UNBLOCK : constant := 1;
 183    SIG_SETMASK : constant := 2;
 184    SIG_PENDING : constant := 5;
 185
 186    SA_NOCLDSTOP : constant := 16#0001#;
 187    SA_SIGINFO   : constant := 16#0002#;
 188    SA_RESETHAND : constant := 16#0004#;
 189    SA_ONSTACK   : constant := 16#0008#;
 190    SA_NODEFER   : constant := 16#0010#;
 191    SA_NOCLDWAIT : constant := 16#0020#;
 192
 193    SS_ONSTACK   : constant := 1;
 194    SS_DISABLE   : constant := 2;
 195
 196    SIG_DFL : constant := 0;
 197    SIG_IGN : constant := 1;
 198
 199    function sigaction
 200      (sig  : Signal;
 201       act  : struct_sigaction_ptr;
 202       oact : struct_sigaction_ptr) return int;
 203    pragma Import (C, sigaction, "sigaction");
 204
 205    ----------
 206    -- Time --
 207    ----------
 208
 209    Time_Slice_Supported : constant Boolean := True;
 210    --  Indicates whether time slicing is supported
 211
 212    type timespec is private;
 213
 214    type clockid_t is new int;
 215
 216    function clock_gettime
 217      (clock_id : clockid_t; tp : access timespec) return int;
 218    pragma Import (C, clock_gettime, "clock_gettime");
 219
 220    function clock_getres
 221      (clock_id : clockid_t;
 222       res      : access timespec) return int;
 223    pragma Import (C, clock_getres, "clock_getres");
 224
 225    function To_Duration (TS : timespec) return Duration;
 226    pragma Inline (To_Duration);
 227
 228    function To_Timespec (D : Duration) return timespec;
 229    pragma Inline (To_Timespec);
 230
 231    function sysconf (name : int) return long;
 232    pragma Import (C, sysconf);
 233
 234    SC_CLK_TCK          : constant := 2;
 235    SC_NPROCESSORS_ONLN : constant := 84;
 236
 237    -------------------------
 238    -- Priority Scheduling --
 239    -------------------------
 240
 241    SCHED_OTHER : constant := 3;
 242    SCHED_FIFO  : constant := 1;
 243    SCHED_RR    : constant := 2;
 244
 245    function To_Target_Priority
 246      (Prio : System.Any_Priority) return Interfaces.C.int
 247      with Inline_Always;
 248    --  Maps System.Any_Priority to a POSIX priority
 249
 250    -------------
 251    -- Process --
 252    -------------
 253
 254    type pid_t is private;
 255
 256    function kill (pid : pid_t; sig : Signal) return int;
 257    pragma Import (C, kill, "kill");
 258
 259    function getpid return pid_t;
 260    pragma Import (C, getpid, "getpid");
 261
 262    -------------
 263    -- Threads --
 264    -------------
 265
 266    type Thread_Body is access
 267      function (arg : System.Address) return System.Address;
 268    pragma Convention (C, Thread_Body);
 269
 270    function Thread_Body_Access is new
 271      Ada.Unchecked_Conversion (System.Address, Thread_Body);
 272
 273    type pthread_t is new unsigned_long;
 274    subtype Thread_Id is pthread_t;
 275
 276    function To_pthread_t is
 277      new Ada.Unchecked_Conversion (unsigned_long, pthread_t);
 278
 279    type pthread_mutex_t      is limited private;
 280    type pthread_cond_t       is limited private;
 281    type pthread_attr_t       is limited private;
 282    type pthread_mutexattr_t  is limited private;
 283    type pthread_condattr_t   is limited private;
 284    type pthread_key_t        is private;
 285
 286    PTHREAD_CREATE_DETACHED : constant := 1;
 287
 288    PTHREAD_SCOPE_PROCESS : constant := 4;
 289    PTHREAD_SCOPE_SYSTEM  : constant := 0;
 290
 291    --  Read/Write lock not supported on Android.
 292
 293    subtype pthread_rwlock_t     is pthread_mutex_t;
 294    subtype pthread_rwlockattr_t is pthread_mutexattr_t;
 295
 296    -----------
 297    -- Stack --
 298    -----------
 299
 300    type stack_t is record
 301       ss_sp    : System.Address;
 302       ss_flags : int;
 303       ss_size  : size_t;
 304    end record;
 305    pragma Convention (C, stack_t);
 306
 307    function sigaltstack
 308      (ss  : not null access stack_t;
 309       oss : access stack_t) return int;
 310    pragma Import (C, sigaltstack, "sigaltstack");
 311
 312    Alternate_Stack : aliased System.Address;
 313    --  Dummy definition: alternate stack not available due to missing
 314    --  sigaltstack
 315
 316    Alternate_Stack_Size : constant := 0;
 317    --  This must be in keeping with init.c:__gnat_alternate_stack
 318
 319    Stack_Base_Available : constant Boolean := False;
 320    --  Indicates whether the stack base is available on this target
 321
 322    function Get_Stack_Base (thread : pthread_t) return System.Address
 323      with Inline_Always;
 324    --  This is a dummy procedure to share some GNULLI files
 325
 326    function Get_Page_Size return int;
 327    pragma Import (C, Get_Page_Size, "getpagesize");
 328    --  Returns the size of a page
 329
 330    PROT_NONE  : constant := 0;
 331    PROT_READ  : constant := 1;
 332    PROT_WRITE : constant := 2;
 333    PROT_EXEC  : constant := 4;
 334    PROT_ALL   : constant := PROT_READ + PROT_WRITE + PROT_EXEC;
 335    PROT_ON    : constant := PROT_READ;
 336    PROT_OFF   : constant := PROT_ALL;
 337
 338    function mprotect (addr : Address; len : size_t; prot : int) return int;
 339    pragma Import (C, mprotect);
 340
 341    ---------------------------------------
 342    -- Nonstandard Thread Initialization --
 343    ---------------------------------------
 344
 345    procedure pthread_init with Inline_Always;
 346
 347    -------------------------
 348    -- POSIX.1c  Section 3 --
 349    -------------------------
 350
 351    function sigwait (set : access sigset_t; sig : access Signal) return int;
 352    pragma Import (C, sigwait, "sigwait");
 353
 354    function pthread_kill (thread : pthread_t; sig : Signal) return int;
 355    pragma Import (C, pthread_kill, "pthread_kill");
 356
 357    function pthread_sigmask
 358      (how  : int;
 359       set  : access sigset_t;
 360       oset : access sigset_t) return int;
 361    pragma Import (C, pthread_sigmask, "sigprocmask");
 362    --  pthread_sigmask maybe be broken due to mismatch between sigset_t and
 363    --  kernel_sigset_t, substitute sigprocmask temporarily.  ???
 364    --  pragma Import (C, pthread_sigmask, "pthread_sigmask");
 365
 366    --------------------------
 367    -- POSIX.1c  Section 11 --
 368    --------------------------
 369
 370    function pthread_mutexattr_init
 371      (attr : access pthread_mutexattr_t) return int;
 372    pragma Import (C, pthread_mutexattr_init, "pthread_mutexattr_init");
 373
 374    function pthread_mutexattr_destroy
 375      (attr : access pthread_mutexattr_t) return int;
 376    pragma Import (C, pthread_mutexattr_destroy, "pthread_mutexattr_destroy");
 377
 378    function pthread_mutex_init
 379      (mutex : access pthread_mutex_t;
 380       attr  : access pthread_mutexattr_t) return int;
 381    pragma Import (C, pthread_mutex_init, "pthread_mutex_init");
 382
 383    function pthread_mutex_destroy (mutex : access pthread_mutex_t) return int;
 384    pragma Import (C, pthread_mutex_destroy, "pthread_mutex_destroy");
 385
 386    function pthread_mutex_lock (mutex : access pthread_mutex_t) return int;
 387    pragma Import (C, pthread_mutex_lock, "pthread_mutex_lock");
 388
 389    function pthread_mutex_unlock (mutex : access pthread_mutex_t) return int;
 390    pragma Import (C, pthread_mutex_unlock, "pthread_mutex_unlock");
 391
 392    function pthread_condattr_init
 393      (attr : access pthread_condattr_t) return int;
 394    pragma Import (C, pthread_condattr_init, "pthread_condattr_init");
 395
 396    function pthread_condattr_destroy
 397      (attr : access pthread_condattr_t) return int;
 398    pragma Import (C, pthread_condattr_destroy, "pthread_condattr_destroy");
 399
 400    function pthread_cond_init
 401      (cond : access pthread_cond_t;
 402       attr : access pthread_condattr_t) return int;
 403    pragma Import (C, pthread_cond_init, "pthread_cond_init");
 404
 405    function pthread_cond_destroy (cond : access pthread_cond_t) return int;
 406    pragma Import (C, pthread_cond_destroy, "pthread_cond_destroy");
 407
 408    function pthread_cond_signal (cond : access pthread_cond_t) return int;
 409    pragma Import (C, pthread_cond_signal, "pthread_cond_signal");
 410
 411    function pthread_cond_wait
 412      (cond  : access pthread_cond_t;
 413       mutex : access pthread_mutex_t) return int;
 414    pragma Import (C, pthread_cond_wait, "pthread_cond_wait");
 415
 416    function pthread_cond_timedwait
 417      (cond    : access pthread_cond_t;
 418       mutex   : access pthread_mutex_t;
 419       abstime : access timespec) return int;
 420    pragma Import (C, pthread_cond_timedwait, "pthread_cond_timedwait");
 421
 422    Relative_Timed_Wait : constant Boolean := False;
 423    --  pthread_cond_timedwait requires an absolute delay time
 424
 425    --------------------------
 426    -- POSIX.1c  Section 13 --
 427    --------------------------
 428
 429    PTHREAD_PRIO_INHERIT : constant := 0;
 430    PTHREAD_PRIO_NONE    : constant := 1;
 431    PTHREAD_PRIO_PROTECT : constant := 2;
 432
 433    function pthread_mutexattr_setprotocol
 434      (attr     : access pthread_mutexattr_t;
 435       protocol : int) return int is (0);
 436
 437    function pthread_mutexattr_setprioceiling
 438      (attr        : access pthread_mutexattr_t;
 439       prioceiling : int) return int is (0);
 440
 441    type struct_sched_param is record
 442       sched_priority : int;  --  scheduling priority
 443    end record;
 444    pragma Convention (C, struct_sched_param);
 445
 446    function pthread_setschedparam
 447      (thread : pthread_t;
 448       policy : int;
 449       param  : access struct_sched_param) return int;
 450    pragma Import (C, pthread_setschedparam, "pthread_setschedparam");
 451
 452    function pthread_attr_setscope
 453      (attr  : access pthread_attr_t;
 454       scope : int) return int;
 455    pragma Import (C, pthread_attr_setscope, "pthread_attr_setscope");
 456
 457    function pthread_attr_setschedpolicy
 458      (attr   : access pthread_attr_t;
 459       policy : int) return int;
 460    pragma Import
 461      (C, pthread_attr_setschedpolicy, "pthread_attr_setschedpolicy");
 462
 463    function sched_yield return int;
 464    pragma Import (C, sched_yield, "sched_yield");
 465
 466    ---------------------------
 467    -- P1003.1c - Section 16 --
 468    ---------------------------
 469
 470    function pthread_attr_init
 471      (attributes : access pthread_attr_t) return int;
 472    pragma Import (C, pthread_attr_init, "pthread_attr_init");
 473
 474    function pthread_attr_destroy
 475      (attributes : access pthread_attr_t) return int;
 476    pragma Import (C, pthread_attr_destroy, "pthread_attr_destroy");
 477
 478    function pthread_attr_setdetachstate
 479      (attr        : access pthread_attr_t;
 480       detachstate : int) return int;
 481    pragma Import
 482      (C, pthread_attr_setdetachstate, "pthread_attr_setdetachstate");
 483
 484    function pthread_attr_setstacksize
 485      (attr      : access pthread_attr_t;
 486       stacksize : size_t) return int;
 487    pragma Import (C, pthread_attr_setstacksize, "pthread_attr_setstacksize");
 488
 489    function pthread_create
 490      (thread        : access pthread_t;
 491       attributes    : access pthread_attr_t;
 492       start_routine : Thread_Body;
 493       arg           : System.Address) return int;
 494    pragma Import (C, pthread_create, "pthread_create");
 495
 496    procedure pthread_exit (status : System.Address);
 497    pragma Import (C, pthread_exit, "pthread_exit");
 498
 499    function pthread_self return pthread_t;
 500    pragma Import (C, pthread_self, "pthread_self");
 501
 502    function lwp_self return System.Address;
 503    pragma Import (C, lwp_self, "pthread_self");
 504
 505    --------------------------
 506    -- POSIX.1c  Section 17 --
 507    --------------------------
 508
 509    function pthread_setspecific
 510      (key   : pthread_key_t;
 511       value : System.Address) return int;
 512    pragma Import (C, pthread_setspecific, "pthread_setspecific");
 513
 514    function pthread_getspecific (key : pthread_key_t) return System.Address;
 515    pragma Import (C, pthread_getspecific, "pthread_getspecific");
 516
 517    type destructor_pointer is access procedure (arg : System.Address);
 518    pragma Convention (C, destructor_pointer);
 519
 520    function pthread_key_create
 521      (key        : access pthread_key_t;
 522       destructor : destructor_pointer) return int;
 523    pragma Import (C, pthread_key_create, "pthread_key_create");
 524
 525    CPU_SETSIZE : constant := 1_024;
 526    --  Size of the cpu_set_t mask on most linux systems (SUSE 11 uses 4_096).
 527    --  This is kept for backward compatibility (System.Task_Info uses it), but
 528    --  the run-time library does no longer rely on static masks, using
 529    --  dynamically allocated masks instead.
 530
 531    type bit_field is array (1 .. CPU_SETSIZE) of Boolean;
 532    for bit_field'Size use CPU_SETSIZE;
 533    pragma Pack (bit_field);
 534    pragma Convention (C, bit_field);
 535
 536    type cpu_set_t is record
 537       bits : bit_field;
 538    end record;
 539    pragma Convention (C, cpu_set_t);
 540
 541    type cpu_set_t_ptr is access all cpu_set_t;
 542    --  In the run-time library we use this pointer because the size of type
 543    --  cpu_set_t varies depending on the glibc version. Hence, objects of type
 544    --  cpu_set_t are allocated dynamically using the number of processors
 545    --  available in the target machine (value obtained at execution time).
 546
 547    function CPU_ALLOC (count : size_t) return cpu_set_t_ptr;
 548    pragma Import (C, CPU_ALLOC, "__gnat_cpu_alloc");
 549    --  Wrapper around the CPU_ALLOC C macro
 550
 551    function CPU_ALLOC_SIZE (count : size_t) return size_t;
 552    pragma Import (C, CPU_ALLOC_SIZE, "__gnat_cpu_alloc_size");
 553    --  Wrapper around the CPU_ALLOC_SIZE C macro
 554
 555    procedure CPU_FREE (cpuset : cpu_set_t_ptr);
 556    pragma Import (C, CPU_FREE, "__gnat_cpu_free");
 557    --  Wrapper around the CPU_FREE C macro
 558
 559    procedure CPU_ZERO (count : size_t; cpuset : cpu_set_t_ptr);
 560    pragma Import (C, CPU_ZERO, "__gnat_cpu_zero");
 561    --  Wrapper around the CPU_ZERO_S C macro
 562
 563    procedure CPU_SET (cpu : int; count : size_t; cpuset : cpu_set_t_ptr);
 564    pragma Import (C, CPU_SET, "__gnat_cpu_set");
 565    --  Wrapper around the CPU_SET_S C macro
 566
 567 private
 568
 569    type sigset_t is new Interfaces.C.unsigned_long;
 570    pragma Convention (C, sigset_t);
 571    for sigset_t'Alignment use Interfaces.C.unsigned_long'Alignment;
 572
 573    type pid_t is new int;
 574
 575    type time_t is new long;
 576
 577    type timespec is record
 578       tv_sec  : time_t;
 579       tv_nsec : long;
 580    end record;
 581    pragma Convention (C, timespec);
 582
 583    type unsigned_long_long_t is mod 2 ** 64;
 584    --  Local type only used to get the alignment of this type below
 585
 586    subtype char_array is Interfaces.C.char_array;
 587
 588    type pthread_attr_t is record
 589       Data : char_array (1 .. OS_Constants.PTHREAD_ATTR_SIZE);
 590    end record;
 591    pragma Convention (C, pthread_attr_t);
 592    for pthread_attr_t'Alignment use Interfaces.C.unsigned_long'Alignment;
 593
 594    type pthread_condattr_t is record
 595       Data : char_array (1 .. OS_Constants.PTHREAD_CONDATTR_SIZE);
 596    end record;
 597    pragma Convention (C, pthread_condattr_t);
 598    for pthread_condattr_t'Alignment use Interfaces.C.int'Alignment;
 599
 600    type pthread_mutexattr_t is record
 601       Data : char_array (1 .. OS_Constants.PTHREAD_MUTEXATTR_SIZE);
 602    end  record;
 603    pragma Convention (C, pthread_mutexattr_t);
 604    for pthread_mutexattr_t'Alignment use Interfaces.C.int'Alignment;
 605
 606    type pthread_mutex_t is record
 607       Data : char_array (1 .. OS_Constants.PTHREAD_MUTEX_SIZE);
 608    end record;
 609    pragma Convention (C, pthread_mutex_t);
 610    for pthread_mutex_t'Alignment use Interfaces.C.unsigned_long'Alignment;
 611
 612    type pthread_cond_t is record
 613       Data : char_array (1 .. OS_Constants.PTHREAD_COND_SIZE);
 614    end record;
 615    pragma Convention (C, pthread_cond_t);
 616    for pthread_cond_t'Alignment use unsigned_long_long_t'Alignment;
 617
 618    type pthread_key_t is new unsigned;
 619
 620 end System.OS_Interface;