gcc/ada/s-osinte-vms.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) 1995-2005, 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 a OpenVMS/Alpha version of this package
  36
  37 --  This package encapsulates 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 ("--for-linker=sys$library:pthread$rtl.exe");
  50    --  Link in the DEC threads library.
  51
  52    --  pragma Linker_Options ("--for-linker=/threads_enable");
  53    --  Enable upcalls and multiple kernel threads.
  54
  55    subtype int            is Interfaces.C.int;
  56    subtype short          is Interfaces.C.short;
  57    subtype long           is Interfaces.C.long;
  58    subtype unsigned       is Interfaces.C.unsigned;
  59    subtype unsigned_short is Interfaces.C.unsigned_short;
  60    subtype unsigned_long  is Interfaces.C.unsigned_long;
  61    subtype unsigned_char  is Interfaces.C.unsigned_char;
  62    subtype plain_char     is Interfaces.C.plain_char;
  63    subtype size_t         is Interfaces.C.size_t;
  64
  65    -----------------------------
  66    -- Signals (Interrupt IDs) --
  67    -----------------------------
  68
  69    --  Type signal has an arbitrary limit of 31
  70
  71    Max_Interrupt : constant := 31;
  72    type Signal is new unsigned range 0 .. Max_Interrupt;
  73    for Signal'Size use unsigned'Size;
  74
  75    type sigset_t is array (Signal) of Boolean;
  76    pragma Pack (sigset_t);
  77
  78    --  Interrupt_Number_Type
  79    --  Unsigned long integer denoting the number of an interrupt
  80
  81    subtype Interrupt_Number_Type is unsigned_long;
  82
  83    --  OpenVMS system services return values of type Cond_Value_Type.
  84
  85    subtype Cond_Value_Type is unsigned_long;
  86    subtype Short_Cond_Value_Type is unsigned_short;
  87
  88    type IO_Status_Block_Type is record
  89       Status   : Short_Cond_Value_Type;
  90       Count    : unsigned_short;
  91       Dev_Info : unsigned_long;
  92    end record;
  93
  94    type AST_Handler is access procedure (Param : Address);
  95    No_AST_Handler : constant AST_Handler := null;
  96
  97    CMB_M_READONLY  : constant := 16#00000001#;
  98    CMB_M_WRITEONLY : constant := 16#00000002#;
  99    AGN_M_READONLY  : constant := 16#00000001#;
 100    AGN_M_WRITEONLY : constant := 16#00000002#;
 101
 102    IO_WRITEVBLK : constant := 48;  --  WRITE VIRTUAL BLOCK
 103    IO_READVBLK  : constant := 49;  --  READ VIRTUAL BLOCK
 104
 105    ----------------
 106    -- Sys_Assign --
 107    ----------------
 108    --
 109    --  Assign I/O Channel
 110    --
 111    --  Status = returned status
 112    --  Devnam = address  of  device  name  or  logical  name   string
 113    --               descriptor
 114    --  Chan   = address of word to receive channel number assigned
 115    --  Acmode = access mode associated with channel
 116    --  Mbxnam = address of mailbox logical name string descriptor, if
 117    --               mailbox associated with device
 118    --  Flags  = optional channel flags longword for specifying options
 119    --           for the $ASSIGN operation
 120    --
 121
 122    procedure Sys_Assign
 123      (Status : out Cond_Value_Type;
 124       Devnam : in String;
 125       Chan   : out unsigned_short;
 126       Acmode : in unsigned_short := 0;
 127       Mbxnam : in String := String'Null_Parameter;
 128       Flags  : in unsigned_long := 0);
 129    pragma Interface (External, Sys_Assign);
 130    pragma Import_Valued_Procedure
 131      (Sys_Assign, "SYS$ASSIGN",
 132       (Cond_Value_Type, String,         unsigned_short,
 133        unsigned_short,  String,         unsigned_long),
 134       (Value,           Descriptor (s), Reference,
 135        Value,           Descriptor (s), Value),
 136       Flags);
 137
 138    ----------------
 139    -- Sys_Cantim --
 140    ----------------
 141    --
 142    --  Cancel Timer
 143    --
 144    --  Status  = returned status
 145    --  Reqidt  = ID of timer to be cancelled
 146    --  Acmode  = Access mode
 147    --
 148    procedure Sys_Cantim
 149      (Status : out Cond_Value_Type;
 150       Reqidt : in Address;
 151       Acmode : in unsigned);
 152    pragma Interface (External, Sys_Cantim);
 153    pragma Import_Valued_Procedure
 154      (Sys_Cantim, "SYS$CANTIM",
 155       (Cond_Value_Type, Address, unsigned),
 156       (Value,           Value,   Value));
 157
 158    ----------------
 159    -- Sys_Crembx --
 160    ----------------
 161    --
 162    --  Create mailbox
 163    --
 164    --     Status  = returned status
 165    --     Prmflg  = permanent flag
 166    --     Chan    = channel
 167    --     Maxmsg  = maximum message
 168    --     Bufquo  = buufer quote
 169    --     Promsk  = protection mast
 170    --     Acmode  = access mode
 171    --     Lognam  = logical name
 172    --     Flags   = flags
 173    --
 174    procedure Sys_Crembx
 175      (Status : out Cond_Value_Type;
 176       Prmflg : in Boolean;
 177       Chan   : out unsigned_short;
 178       Maxmsg : in unsigned_long := 0;
 179       Bufquo : in unsigned_long := 0;
 180       Promsk : in unsigned_short := 0;
 181       Acmode : in unsigned_short := 0;
 182       Lognam : in String;
 183       Flags  : in unsigned_long := 0);
 184    pragma Interface (External, Sys_Crembx);
 185    pragma Import_Valued_Procedure
 186      (Sys_Crembx, "SYS$CREMBX",
 187       (Cond_Value_Type, Boolean,        unsigned_short,
 188        unsigned_long,   unsigned_long,  unsigned_short,
 189        unsigned_short,  String,         unsigned_long),
 190       (Value,           Value,          Reference,
 191        Value,           Value,          Value,
 192        Value,           Descriptor (s), Value));
 193
 194    -------------
 195    -- Sys_QIO --
 196    -------------
 197    --
 198    --    Queue I/O
 199    --
 200    --     Status = Returned status of call
 201    --     EFN    = event flag to be set when I/O completes
 202    --     Chan   = channel
 203    --     Func   = function
 204    --     Iosb   = I/O status block
 205    --     Astadr = system trap to be generated when I/O completes
 206    --     Astprm = AST parameter
 207    --     P1-6   = optional parameters
 208
 209    procedure Sys_QIO
 210      (Status : out Cond_Value_Type;
 211       EFN    : in unsigned_long := 0;
 212       Chan   : in unsigned_short;
 213       Func   : in unsigned_long := 0;
 214       Iosb   : out IO_Status_Block_Type;
 215       Astadr : in AST_Handler := No_AST_Handler;
 216       Astprm : in Address := Null_Address;
 217       P1     : in  unsigned_long := 0;
 218       P2     : in  unsigned_long := 0;
 219       P3     : in  unsigned_long := 0;
 220       P4     : in  unsigned_long := 0;
 221       P5     : in  unsigned_long := 0;
 222       P6     : in  unsigned_long := 0);
 223
 224    procedure Sys_QIO
 225      (Status : out Cond_Value_Type;
 226       EFN    : in unsigned_long := 0;
 227       Chan   : in unsigned_short;
 228       Func   : in unsigned_long := 0;
 229       Iosb   : in Address := Null_Address;
 230       Astadr : in AST_Handler := No_AST_Handler;
 231       Astprm : in Address := Null_Address;
 232       P1     : in  unsigned_long := 0;
 233       P2     : in  unsigned_long := 0;
 234       P3     : in  unsigned_long := 0;
 235       P4     : in  unsigned_long := 0;
 236       P5     : in  unsigned_long := 0;
 237       P6     : in  unsigned_long := 0);
 238
 239    pragma Interface (External, Sys_QIO);
 240    pragma Import_Valued_Procedure
 241      (Sys_QIO, "SYS$QIO",
 242       (Cond_Value_Type,      unsigned_long, unsigned_short, unsigned_long,
 243        IO_Status_Block_Type, AST_Handler,   Address,
 244        unsigned_long,        unsigned_long, unsigned_long,
 245        unsigned_long,        unsigned_long, unsigned_long),
 246       (Value,                Value,         Value,          Value,
 247        Reference,            Value,         Value,
 248        Value,                Value,         Value,
 249        Value,                Value,         Value));
 250
 251    pragma Import_Valued_Procedure
 252      (Sys_QIO, "SYS$QIO",
 253       (Cond_Value_Type, unsigned_long, unsigned_short, unsigned_long,
 254        Address,         AST_Handler,   Address,
 255        unsigned_long,   unsigned_long, unsigned_long,
 256        unsigned_long,   unsigned_long, unsigned_long),
 257       (Value,           Value,         Value,          Value,
 258        Value,           Value,         Value,
 259        Value,           Value,         Value,
 260        Value,           Value,         Value));
 261
 262    ----------------
 263    -- Sys_Setimr --
 264    ----------------
 265    --
 266    --    Set Timer
 267    --
 268    --     Status = Returned status of call
 269    --     EFN    = event flag to be set when timer expires
 270    --     Tim    = expiration time
 271    --     AST    = system trap to be generated when timer expires
 272    --     Redidt = returned ID of timer (e.g. to cancel timer)
 273    --     Flags  = flags
 274    --
 275    procedure Sys_Setimr
 276      (Status : out Cond_Value_Type;
 277       EFN    : in unsigned_long;
 278       Tim    : in Long_Integer;
 279       AST    : in AST_Handler;
 280       Reqidt : in Address;
 281       Flags  : in unsigned_long);
 282    pragma Interface (External, Sys_Setimr);
 283    pragma Import_Valued_Procedure
 284      (Sys_Setimr, "SYS$SETIMR",
 285       (Cond_Value_Type, unsigned_long,     Long_Integer,
 286        AST_Handler,     Address,           unsigned_long),
 287       (Value,           Value,             Reference,
 288        Value,           Value,             Value));
 289
 290    Interrupt_ID_0   : constant  := 0;
 291    Interrupt_ID_1   : constant  := 1;
 292    Interrupt_ID_2   : constant  := 2;
 293    Interrupt_ID_3   : constant  := 3;
 294    Interrupt_ID_4   : constant  := 4;
 295    Interrupt_ID_5   : constant  := 5;
 296    Interrupt_ID_6   : constant  := 6;
 297    Interrupt_ID_7   : constant  := 7;
 298    Interrupt_ID_8   : constant  := 8;
 299    Interrupt_ID_9   : constant  := 9;
 300    Interrupt_ID_10  : constant  := 10;
 301    Interrupt_ID_11  : constant  := 11;
 302    Interrupt_ID_12  : constant  := 12;
 303    Interrupt_ID_13  : constant  := 13;
 304    Interrupt_ID_14  : constant  := 14;
 305    Interrupt_ID_15  : constant  := 15;
 306    Interrupt_ID_16  : constant  := 16;
 307    Interrupt_ID_17  : constant  := 17;
 308    Interrupt_ID_18  : constant  := 18;
 309    Interrupt_ID_19  : constant  := 19;
 310    Interrupt_ID_20  : constant  := 20;
 311    Interrupt_ID_21  : constant  := 21;
 312    Interrupt_ID_22  : constant  := 22;
 313    Interrupt_ID_23  : constant  := 23;
 314    Interrupt_ID_24  : constant  := 24;
 315    Interrupt_ID_25  : constant  := 25;
 316    Interrupt_ID_26  : constant  := 26;
 317    Interrupt_ID_27  : constant  := 27;
 318    Interrupt_ID_28  : constant  := 28;
 319    Interrupt_ID_29  : constant  := 29;
 320    Interrupt_ID_30  : constant  := 30;
 321    Interrupt_ID_31  : constant  := 31;
 322
 323    -----------
 324    -- Errno --
 325    -----------
 326
 327    function errno return int;
 328    pragma Import (C, errno, "__get_errno");
 329
 330    EINTR  : constant := 4;   --  Interrupted system call
 331    EAGAIN : constant := 11;  --  No more processes
 332    ENOMEM : constant := 12;  --  Not enough core
 333
 334    -------------------------
 335    -- Priority Scheduling --
 336    -------------------------
 337
 338    SCHED_FIFO  : constant := 1;
 339    SCHED_RR    : constant := 2;
 340    SCHED_OTHER : constant := 3;
 341    SCHED_BG    : constant := 4;
 342    SCHED_LFI   : constant := 5;
 343    SCHED_LRR   : constant := 6;
 344
 345    -------------
 346    -- Process --
 347    -------------
 348
 349    type pid_t is private;
 350
 351    function kill (pid : pid_t; sig : Signal) return int;
 352    pragma Import (C, kill);
 353
 354    function getpid return pid_t;
 355    pragma Import (C, getpid);
 356
 357    -------------
 358    -- Threads --
 359    -------------
 360
 361    type Thread_Body is access
 362      function (arg : System.Address) return System.Address;
 363
 364    function Thread_Body_Access is new
 365      Unchecked_Conversion (System.Address, Thread_Body);
 366
 367    type pthread_t           is private;
 368    subtype Thread_Id        is pthread_t;
 369
 370    type pthread_mutex_t     is limited private;
 371    type pthread_cond_t      is limited private;
 372    type pthread_attr_t      is limited private;
 373    type pthread_mutexattr_t is limited private;
 374    type pthread_condattr_t  is limited private;
 375    type pthread_key_t       is private;
 376
 377    PTHREAD_CREATE_JOINABLE     : constant := 0;
 378    PTHREAD_CREATE_DETACHED     : constant := 1;
 379
 380    PTHREAD_CANCEL_DISABLE      : constant := 0;
 381    PTHREAD_CANCEL_ENABLE       : constant := 1;
 382
 383    PTHREAD_CANCEL_DEFERRED     : constant := 0;
 384    PTHREAD_CANCEL_ASYNCHRONOUS : constant := 1;
 385
 386    --  Don't use ERRORCHECK mutexes, they don't work when a thread is not
 387    --  the owner.  AST's, at least, unlock others threads mutexes. Even
 388    --  if the error is ignored, they don't work.
 389    PTHREAD_MUTEX_NORMAL_NP     : constant := 0;
 390    PTHREAD_MUTEX_RECURSIVE_NP  : constant := 1;
 391    PTHREAD_MUTEX_ERRORCHECK_NP : constant := 2;
 392
 393    PTHREAD_INHERIT_SCHED       : constant := 0;
 394    PTHREAD_EXPLICIT_SCHED      : constant := 1;
 395
 396    function pthread_cancel (thread : pthread_t) return int;
 397    pragma Import (C, pthread_cancel, "PTHREAD_CANCEL");
 398
 399    procedure pthread_testcancel;
 400    pragma Import (C, pthread_testcancel, "PTHREAD_TESTCANCEL");
 401
 402    function pthread_setcancelstate
 403      (newstate : int; oldstate : access int) return int;
 404    pragma Import (C, pthread_setcancelstate, "PTHREAD_SETCANCELSTATE");
 405
 406    function pthread_setcanceltype
 407      (newtype : int; oldtype : access int) return int;
 408    pragma Import (C, pthread_setcanceltype, "PTHREAD_SETCANCELTYPE");
 409
 410    -------------------------
 411    -- POSIX.1c  Section 3 --
 412    -------------------------
 413
 414    function pthread_lock_global_np return int;
 415    pragma Import (C, pthread_lock_global_np, "PTHREAD_LOCK_GLOBAL_NP");
 416
 417    function pthread_unlock_global_np return int;
 418    pragma Import (C, pthread_unlock_global_np, "PTHREAD_UNLOCK_GLOBAL_NP");
 419
 420    --------------------------
 421    -- POSIX.1c  Section 11 --
 422    --------------------------
 423
 424    function pthread_mutexattr_init
 425      (attr : access pthread_mutexattr_t) return int;
 426    pragma Import (C, pthread_mutexattr_init, "PTHREAD_MUTEXATTR_INIT");
 427
 428    function pthread_mutexattr_destroy
 429      (attr : access pthread_mutexattr_t) return int;
 430    pragma Import (C, pthread_mutexattr_destroy, "PTHREAD_MUTEXATTR_DESTROY");
 431
 432    function pthread_mutexattr_settype_np
 433      (attr      : access pthread_mutexattr_t;
 434       mutextype : int) return int;
 435    pragma Import (C, pthread_mutexattr_settype_np,
 436                      "PTHREAD_MUTEXATTR_SETTYPE_NP");
 437
 438    function pthread_mutex_init
 439      (mutex : access pthread_mutex_t;
 440       attr  : access pthread_mutexattr_t) return int;
 441    pragma Import (C, pthread_mutex_init, "PTHREAD_MUTEX_INIT");
 442
 443    function pthread_mutex_destroy (mutex : access pthread_mutex_t) return int;
 444    pragma Import (C, pthread_mutex_destroy, "PTHREAD_MUTEX_DESTROY");
 445
 446    function pthread_mutex_lock (mutex : access pthread_mutex_t) return int;
 447    pragma Import (C, pthread_mutex_lock, "PTHREAD_MUTEX_LOCK");
 448
 449    function pthread_mutex_unlock (mutex : access pthread_mutex_t) return int;
 450    pragma Import (C, pthread_mutex_unlock, "PTHREAD_MUTEX_UNLOCK");
 451
 452    function pthread_condattr_init
 453      (attr : access pthread_condattr_t) return int;
 454    pragma Import (C, pthread_condattr_init, "PTHREAD_CONDATTR_INIT");
 455
 456    function pthread_condattr_destroy
 457      (attr : access pthread_condattr_t) return int;
 458    pragma Import (C, pthread_condattr_destroy, "PTHREAD_CONDATTR_DESTROY");
 459
 460    function pthread_cond_init
 461      (cond : access pthread_cond_t;
 462       attr : access pthread_condattr_t) return int;
 463    pragma Import (C, pthread_cond_init, "PTHREAD_COND_INIT");
 464
 465    function pthread_cond_destroy (cond : access pthread_cond_t) return int;
 466    pragma Import (C, pthread_cond_destroy, "PTHREAD_COND_DESTROY");
 467
 468    function pthread_cond_signal (cond : access pthread_cond_t) return int;
 469    pragma Import (C, pthread_cond_signal, "PTHREAD_COND_SIGNAL");
 470
 471    function pthread_cond_signal_int_np
 472      (cond : access pthread_cond_t) return int;
 473    pragma Import (C, pthread_cond_signal_int_np,
 474                   "PTHREAD_COND_SIGNAL_INT_NP");
 475
 476    function pthread_cond_wait
 477      (cond  : access pthread_cond_t;
 478       mutex : access pthread_mutex_t) return int;
 479    pragma Import (C, pthread_cond_wait, "PTHREAD_COND_WAIT");
 480
 481    --------------------------
 482    -- POSIX.1c  Section 13 --
 483    --------------------------
 484
 485    function pthread_mutexattr_setprotocol
 486      (attr : access pthread_mutexattr_t; protocol : int) return int;
 487    pragma Import (C, pthread_mutexattr_setprotocol,
 488                      "PTHREAD_MUTEXATTR_SETPROTOCOL");
 489
 490    type struct_sched_param is record
 491       sched_priority : int;  --  scheduling priority
 492    end record;
 493    for struct_sched_param'Size use 8*4;
 494    pragma Convention (C, struct_sched_param);
 495
 496    function pthread_setschedparam
 497      (thread : pthread_t;
 498       policy : int;
 499       param  : access struct_sched_param) return int;
 500    pragma Import (C, pthread_setschedparam, "PTHREAD_SETSCHEDPARAM");
 501
 502    function pthread_attr_setscope
 503      (attr            : access pthread_attr_t;
 504       contentionscope : int) return int;
 505    pragma Import (C, pthread_attr_setscope, "PTHREAD_ATTR_SETSCOPE");
 506
 507    function pthread_attr_setinheritsched
 508      (attr            : access pthread_attr_t;
 509       inheritsched : int) return int;
 510    pragma Import (C, pthread_attr_setinheritsched,
 511                      "PTHREAD_ATTR_SETINHERITSCHED");
 512
 513    function pthread_attr_setschedpolicy
 514      (attr : access pthread_attr_t; policy : int) return int;
 515    pragma Import (C, pthread_attr_setschedpolicy,
 516                      "PTHREAD_ATTR_SETSCHEDPOLICY");
 517
 518    function pthread_attr_setschedparam
 519      (attr        : access pthread_attr_t;
 520       sched_param : int) return int;
 521    pragma Import (C, pthread_attr_setschedparam, "PTHREAD_ATTR_SETSCHEDPARAM");
 522
 523    function sched_yield return int;
 524
 525    --------------------------
 526    -- P1003.1c  Section 16 --
 527    --------------------------
 528
 529    function pthread_attr_init (attributes : access pthread_attr_t) return int;
 530    pragma Import (C, pthread_attr_init, "PTHREAD_ATTR_INIT");
 531
 532    function pthread_attr_destroy
 533      (attributes : access pthread_attr_t) return int;
 534    pragma Import (C, pthread_attr_destroy, "PTHREAD_ATTR_DESTROY");
 535
 536    function pthread_attr_setdetachstate
 537      (attr        : access pthread_attr_t;
 538       detachstate : int) return int;
 539    pragma Import (C, pthread_attr_setdetachstate,
 540                      "PTHREAD_ATTR_SETDETACHSTATE");
 541
 542    function pthread_attr_setstacksize
 543      (attr      : access pthread_attr_t;
 544       stacksize : size_t) return int;
 545    pragma Import (C, pthread_attr_setstacksize, "PTHREAD_ATTR_SETSTACKSIZE");
 546
 547    function pthread_create
 548      (thread        : access pthread_t;
 549       attributes    : access pthread_attr_t;
 550       start_routine : Thread_Body;
 551       arg           : System.Address) return int;
 552    pragma Import (C, pthread_create, "PTHREAD_CREATE");
 553
 554    procedure pthread_exit (status : System.Address);
 555    pragma Import (C, pthread_exit, "PTHREAD_EXIT");
 556
 557    function pthread_self return pthread_t;
 558
 559    --------------------------
 560    -- POSIX.1c  Section 17 --
 561    --------------------------
 562
 563    function pthread_setspecific
 564      (key   : pthread_key_t;
 565       value : System.Address) return  int;
 566    pragma Import (C, pthread_setspecific, "PTHREAD_SETSPECIFIC");
 567
 568    function pthread_getspecific (key : pthread_key_t) return System.Address;
 569    pragma Import (C, pthread_getspecific, "PTHREAD_GETSPECIFIC");
 570
 571    type destructor_pointer is access procedure (arg : System.Address);
 572
 573    function pthread_key_create
 574      (key        : access pthread_key_t;
 575       destructor : destructor_pointer) return int;
 576    pragma Import (C, pthread_key_create, "PTHREAD_KEY_CREATE");
 577
 578 private
 579
 580    type pid_t is new int;
 581
 582    type pthreadLongAddr_p is mod 2 ** Long_Integer'Size;
 583
 584    type pthreadLongAddr_t is mod 2 ** Long_Integer'Size;
 585    type pthreadLongAddr_t_ptr is mod 2 ** Long_Integer'Size;
 586
 587    type pthreadLongString_t is mod 2 ** Long_Integer'Size;
 588
 589    type pthreadLongUint_t is mod 2 ** Long_Integer'Size;
 590    type pthreadLongUint_array is array (Natural range <>)
 591      of pthreadLongUint_t;
 592
 593    type pthread_t is mod 2 ** Long_Integer'Size;
 594
 595    type pthread_cond_t is record
 596       state    : unsigned;
 597       valid    : unsigned;
 598       name     : pthreadLongString_t;
 599       arg      : unsigned;
 600       sequence : unsigned;
 601       block    : pthreadLongAddr_t_ptr;
 602    end record;
 603    for pthread_cond_t'Size use 8*32;
 604    pragma Convention (C, pthread_cond_t);
 605
 606    type pthread_attr_t is record
 607       valid    : long;
 608       name     : pthreadLongString_t;
 609       arg      : pthreadLongUint_t;
 610       reserved : pthreadLongUint_array (0 .. 18);
 611    end record;
 612    for pthread_attr_t'Size use 8*176;
 613    pragma Convention (C, pthread_attr_t);
 614
 615    type pthread_mutex_t is record
 616       lock     : unsigned;
 617       valid    : unsigned;
 618       name     : pthreadLongString_t;
 619       arg      : unsigned;
 620       sequence : unsigned;
 621       block    : pthreadLongAddr_p;
 622       owner    : unsigned;
 623       depth    : unsigned;
 624    end record;
 625    for pthread_mutex_t'Size use 8*40;
 626    pragma Convention (C, pthread_mutex_t);
 627
 628    type pthread_mutexattr_t is record
 629       valid    : long;
 630       reserved : pthreadLongUint_array (0 .. 14);
 631    end record;
 632    for pthread_mutexattr_t'Size use 8*128;
 633    pragma Convention (C, pthread_mutexattr_t);
 634
 635    type pthread_condattr_t is record
 636       valid    : long;
 637       reserved : pthreadLongUint_array (0 .. 12);
 638    end record;
 639    for pthread_condattr_t'Size use 8*112;
 640    pragma Convention (C, pthread_condattr_t);
 641
 642    type pthread_key_t is new unsigned;
 643
 644    pragma Inline (pthread_self);
 645
 646 end System.OS_Interface;