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) 1995-2012, 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 the OpenVMS version of this package
  34
  35 --  This package encapsulates all direct interfaces to OS services
  36 --  that are 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 Interfaces.C;
  42
  43 with Ada.Unchecked_Conversion;
  44
  45 with System.Aux_DEC;
  46
  47 package System.OS_Interface is
  48    pragma Preelaborate;
  49
  50    --  pragma Linker_Options ("--for-linker=/threads_enable");
  51    --  Enable upcalls and multiple kernel threads.
  52
  53    subtype int            is Interfaces.C.int;
  54    subtype short          is Interfaces.C.short;
  55    subtype long           is Interfaces.C.long;
  56    subtype unsigned       is Interfaces.C.unsigned;
  57    subtype unsigned_short is Interfaces.C.unsigned_short;
  58    subtype unsigned_long  is Interfaces.C.unsigned_long;
  59    subtype unsigned_char  is Interfaces.C.unsigned_char;
  60    subtype plain_char     is Interfaces.C.plain_char;
  61    subtype size_t         is Interfaces.C.size_t;
  62
  63    -----------------------------
  64    -- Signals (Interrupt IDs) --
  65    -----------------------------
  66
  67    --  Type signal has an arbitrary limit of 31
  68
  69    Max_Interrupt : constant := 31;
  70    type Signal is new unsigned range 0 .. Max_Interrupt;
  71    for Signal'Size use unsigned'Size;
  72
  73    type sigset_t is array (Signal) of Boolean;
  74    pragma Pack (sigset_t);
  75
  76    --  Interrupt_Number_Type
  77    --  Unsigned long integer denoting the number of an interrupt
  78
  79    subtype Interrupt_Number_Type is unsigned_long;
  80
  81    --  OpenVMS system services return values of type Cond_Value_Type
  82
  83    subtype Cond_Value_Type is unsigned_long;
  84    subtype Short_Cond_Value_Type is unsigned_short;
  85
  86    type IO_Status_Block_Type is record
  87       Status   : Short_Cond_Value_Type;
  88       Count    : unsigned_short;
  89       Dev_Info : unsigned_long;
  90    end record;
  91
  92    type AST_Handler is access procedure (Param : Address);
  93    pragma Convention (C, AST_Handler);
  94    No_AST_Handler : constant AST_Handler := null;
  95
  96    CMB_M_READONLY  : constant := 16#00000001#;
  97    CMB_M_WRITEONLY : constant := 16#00000002#;
  98    AGN_M_READONLY  : constant := 16#00000001#;
  99    AGN_M_WRITEONLY : constant := 16#00000002#;
 100
 101    IO_WRITEVBLK : constant := 48;  --  WRITE VIRTUAL BLOCK
 102    IO_READVBLK  : constant := 49;  --  READ VIRTUAL BLOCK
 103
 104    ----------------
 105    -- Sys_Assign --
 106    ----------------
 107    --
 108    --  Assign I/O Channel
 109    --
 110    --  Status = returned status
 111    --  Devnam = address  of  device  name  or  logical  name   string
 112    --               descriptor
 113    --  Chan   = address of word to receive channel number assigned
 114    --  Acmode = access mode associated with channel
 115    --  Mbxnam = address of mailbox logical name string descriptor, if
 116    --               mailbox associated with device
 117    --  Flags  = optional channel flags longword for specifying options
 118    --           for the $ASSIGN operation
 119    --
 120
 121    procedure Sys_Assign
 122      (Status : out Cond_Value_Type;
 123       Devnam : String;
 124       Chan   : out unsigned_short;
 125       Acmode : unsigned_short := 0;
 126       Mbxnam : String := String'Null_Parameter;
 127       Flags  : unsigned_long := 0);
 128    pragma Import (External, Sys_Assign);
 129    pragma Import_Valued_Procedure
 130      (Sys_Assign, "SYS$ASSIGN",
 131       (Cond_Value_Type, String,         unsigned_short,
 132        unsigned_short,  String,         unsigned_long),
 133       (Value,           Descriptor (s), Reference,
 134        Value,           Descriptor (s), Value),
 135       Flags);
 136
 137    ----------------
 138    -- Sys_Cantim --
 139    ----------------
 140    --
 141    --  Cancel Timer
 142    --
 143    --  Status  = returned status
 144    --  Reqidt  = ID of timer to be cancelled
 145    --  Acmode  = Access mode
 146    --
 147    procedure Sys_Cantim
 148      (Status : out Cond_Value_Type;
 149       Reqidt : Address;
 150       Acmode : unsigned);
 151    pragma Import (External, Sys_Cantim);
 152    pragma Import_Valued_Procedure
 153      (Sys_Cantim, "SYS$CANTIM",
 154       (Cond_Value_Type, Address, unsigned),
 155       (Value,           Value,   Value));
 156
 157    ----------------
 158    -- Sys_Crembx --
 159    ----------------
 160    --
 161    --  Create mailbox
 162    --
 163    --     Status  = returned status
 164    --     Prmflg  = permanent flag
 165    --     Chan    = channel
 166    --     Maxmsg  = maximum message
 167    --     Bufquo  = buufer quote
 168    --     Promsk  = protection mast
 169    --     Acmode  = access mode
 170    --     Lognam  = logical name
 171    --     Flags   = flags
 172    --
 173    procedure Sys_Crembx
 174      (Status : out Cond_Value_Type;
 175       Prmflg : unsigned_char;
 176       Chan   : out unsigned_short;
 177       Maxmsg : unsigned_long := 0;
 178       Bufquo : unsigned_long := 0;
 179       Promsk : unsigned_short := 0;
 180       Acmode : unsigned_short := 0;
 181       Lognam : String;
 182       Flags  : unsigned_long := 0);
 183    pragma Import (External, Sys_Crembx);
 184    pragma Import_Valued_Procedure
 185      (Sys_Crembx, "SYS$CREMBX",
 186       (Cond_Value_Type, unsigned_char,  unsigned_short,
 187        unsigned_long,   unsigned_long,  unsigned_short,
 188        unsigned_short,  String,         unsigned_long),
 189       (Value,           Value,          Reference,
 190        Value,           Value,          Value,
 191        Value,           Descriptor (s), Value));
 192
 193    -------------
 194    -- Sys_QIO --
 195    -------------
 196    --
 197    --    Queue I/O
 198    --
 199    --     Status = Returned status of call
 200    --     EFN    = event flag to be set when I/O completes
 201    --     Chan   = channel
 202    --     Func   = function
 203    --     Iosb   = I/O status block
 204    --     Astadr = system trap to be generated when I/O completes
 205    --     Astprm = AST parameter
 206    --     P1-6   = optional parameters
 207
 208    procedure Sys_QIO
 209      (Status : out Cond_Value_Type;
 210       EFN    : unsigned_long := 0;
 211       Chan   : unsigned_short;
 212       Func   : unsigned_long := 0;
 213       Iosb   : out IO_Status_Block_Type;
 214       Astadr : AST_Handler := No_AST_Handler;
 215       Astprm : Address := Null_Address;
 216       P1     : unsigned_long := 0;
 217       P2     : unsigned_long := 0;
 218       P3     : unsigned_long := 0;
 219       P4     : unsigned_long := 0;
 220       P5     : unsigned_long := 0;
 221       P6     : unsigned_long := 0);
 222
 223    procedure Sys_QIO
 224      (Status : out Cond_Value_Type;
 225       EFN    : unsigned_long := 0;
 226       Chan   : unsigned_short;
 227       Func   : unsigned_long := 0;
 228       Iosb   : Address := Null_Address;
 229       Astadr : AST_Handler := No_AST_Handler;
 230       Astprm : Address := Null_Address;
 231       P1     : unsigned_long := 0;
 232       P2     : unsigned_long := 0;
 233       P3     : unsigned_long := 0;
 234       P4     : unsigned_long := 0;
 235       P5     : unsigned_long := 0;
 236       P6     : unsigned_long := 0);
 237
 238    pragma Import (External, Sys_QIO);
 239    pragma Import_Valued_Procedure
 240      (Sys_QIO, "SYS$QIO",
 241       (Cond_Value_Type,      unsigned_long, unsigned_short, unsigned_long,
 242        IO_Status_Block_Type, AST_Handler,   Address,
 243        unsigned_long,        unsigned_long, unsigned_long,
 244        unsigned_long,        unsigned_long, unsigned_long),
 245       (Value,                Value,         Value,          Value,
 246        Reference,            Value,         Value,
 247        Value,                Value,         Value,
 248        Value,                Value,         Value));
 249
 250    pragma Import_Valued_Procedure
 251      (Sys_QIO, "SYS$QIO",
 252       (Cond_Value_Type, unsigned_long, unsigned_short, unsigned_long,
 253        Address,         AST_Handler,   Address,
 254        unsigned_long,   unsigned_long, unsigned_long,
 255        unsigned_long,   unsigned_long, unsigned_long),
 256       (Value,           Value,         Value,          Value,
 257        Value,           Value,         Value,
 258        Value,           Value,         Value,
 259        Value,           Value,         Value));
 260
 261    ----------------
 262    -- Sys_Setimr --
 263    ----------------
 264    --
 265    --    Set Timer
 266    --
 267    --     Status = Returned status of call
 268    --     EFN    = event flag to be set when timer expires
 269    --     Tim    = expiration time
 270    --     AST    = system trap to be generated when timer expires
 271    --     Redidt = returned ID of timer (e.g. to cancel timer)
 272    --     Flags  = flags
 273    --
 274    procedure Sys_Setimr
 275      (Status : out Cond_Value_Type;
 276       EFN    : unsigned_long;
 277       Tim    : Long_Integer;
 278       AST    : AST_Handler;
 279       Reqidt : Address;
 280       Flags  : unsigned_long);
 281    pragma Import (External, Sys_Setimr);
 282    pragma Import_Valued_Procedure
 283      (Sys_Setimr, "SYS$SETIMR",
 284       (Cond_Value_Type, unsigned_long,     Long_Integer,
 285        AST_Handler,     Address,           unsigned_long),
 286       (Value,           Value,             Reference,
 287        Value,           Value,             Value));
 288
 289    Interrupt_ID_0   : constant  := 0;
 290    Interrupt_ID_1   : constant  := 1;
 291    Interrupt_ID_2   : constant  := 2;
 292    Interrupt_ID_3   : constant  := 3;
 293    Interrupt_ID_4   : constant  := 4;
 294    Interrupt_ID_5   : constant  := 5;
 295    Interrupt_ID_6   : constant  := 6;
 296    Interrupt_ID_7   : constant  := 7;
 297    Interrupt_ID_8   : constant  := 8;
 298    Interrupt_ID_9   : constant  := 9;
 299    Interrupt_ID_10  : constant  := 10;
 300    Interrupt_ID_11  : constant  := 11;
 301    Interrupt_ID_12  : constant  := 12;
 302    Interrupt_ID_13  : constant  := 13;
 303    Interrupt_ID_14  : constant  := 14;
 304    Interrupt_ID_15  : constant  := 15;
 305    Interrupt_ID_16  : constant  := 16;
 306    Interrupt_ID_17  : constant  := 17;
 307    Interrupt_ID_18  : constant  := 18;
 308    Interrupt_ID_19  : constant  := 19;
 309    Interrupt_ID_20  : constant  := 20;
 310    Interrupt_ID_21  : constant  := 21;
 311    Interrupt_ID_22  : constant  := 22;
 312    Interrupt_ID_23  : constant  := 23;
 313    Interrupt_ID_24  : constant  := 24;
 314    Interrupt_ID_25  : constant  := 25;
 315    Interrupt_ID_26  : constant  := 26;
 316    Interrupt_ID_27  : constant  := 27;
 317    Interrupt_ID_28  : constant  := 28;
 318    Interrupt_ID_29  : constant  := 29;
 319    Interrupt_ID_30  : constant  := 30;
 320    Interrupt_ID_31  : constant  := 31;
 321
 322    -----------
 323    -- Errno --
 324    -----------
 325
 326    function errno return int;
 327    pragma Import (C, errno, "__get_errno");
 328
 329    EINTR  : constant := 4;   --  Interrupted system call
 330    EAGAIN : constant := 11;  --  No more processes
 331    ENOMEM : constant := 12;  --  Not enough core
 332
 333    -------------------------
 334    -- Priority Scheduling --
 335    -------------------------
 336
 337    SCHED_FIFO  : constant := 1;
 338    SCHED_RR    : constant := 2;
 339    SCHED_OTHER : constant := 3;
 340    SCHED_BG    : constant := 4;
 341    SCHED_LFI   : constant := 5;
 342    SCHED_LRR   : constant := 6;
 343
 344    -------------
 345    -- Process --
 346    -------------
 347
 348    type pid_t is private;
 349
 350    function kill (pid : pid_t; sig : Signal) return int;
 351    pragma Import (C, kill);
 352
 353    function getpid return pid_t;
 354    pragma Import (C, getpid);
 355
 356    -------------
 357    -- Threads --
 358    -------------
 359
 360    type Thread_Body is access
 361      function (arg : System.Address) return System.Address;
 362    pragma Convention (C, Thread_Body);
 363
 364    function Thread_Body_Access is new
 365      Ada.Unchecked_Conversion (System.Aux_DEC.Short_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_mutex_setname_np
 453      (attr : access pthread_mutex_t;
 454       name : System.Address;
 455       mbz  : System.Address) return int;
 456    pragma Import (C, pthread_mutex_setname_np, "PTHREAD_MUTEX_SETNAME_NP");
 457
 458    function pthread_condattr_init
 459      (attr : access pthread_condattr_t) return int;
 460    pragma Import (C, pthread_condattr_init, "PTHREAD_CONDATTR_INIT");
 461
 462    function pthread_condattr_destroy
 463      (attr : access pthread_condattr_t) return int;
 464    pragma Import (C, pthread_condattr_destroy, "PTHREAD_CONDATTR_DESTROY");
 465
 466    function pthread_cond_init
 467      (cond : access pthread_cond_t;
 468       attr : access pthread_condattr_t) return int;
 469    pragma Import (C, pthread_cond_init, "PTHREAD_COND_INIT");
 470
 471    function pthread_cond_destroy (cond : access pthread_cond_t) return int;
 472    pragma Import (C, pthread_cond_destroy, "PTHREAD_COND_DESTROY");
 473
 474    function pthread_cond_signal (cond : access pthread_cond_t) return int;
 475    pragma Import (C, pthread_cond_signal, "PTHREAD_COND_SIGNAL");
 476
 477    function pthread_cond_signal_int_np
 478      (cond : access pthread_cond_t) return int;
 479    pragma Import (C, pthread_cond_signal_int_np,
 480                   "PTHREAD_COND_SIGNAL_INT_NP");
 481
 482    function pthread_cond_wait
 483      (cond  : access pthread_cond_t;
 484       mutex : access pthread_mutex_t) return int;
 485    pragma Import (C, pthread_cond_wait, "PTHREAD_COND_WAIT");
 486
 487    --------------------------
 488    -- POSIX.1c  Section 13 --
 489    --------------------------
 490
 491    function pthread_mutexattr_setprotocol
 492      (attr : access pthread_mutexattr_t; protocol : int) return int;
 493    pragma Import (C, pthread_mutexattr_setprotocol,
 494                      "PTHREAD_MUTEXATTR_SETPROTOCOL");
 495
 496    type struct_sched_param is record
 497       sched_priority : int;  --  scheduling priority
 498    end record;
 499    for struct_sched_param'Size use 8*4;
 500    pragma Convention (C, struct_sched_param);
 501
 502    function pthread_setschedparam
 503      (thread : pthread_t;
 504       policy : int;
 505       param  : access struct_sched_param) return int;
 506    pragma Import (C, pthread_setschedparam, "PTHREAD_SETSCHEDPARAM");
 507
 508    function pthread_attr_setscope
 509      (attr            : access pthread_attr_t;
 510       contentionscope : int) return int;
 511    pragma Import (C, pthread_attr_setscope, "PTHREAD_ATTR_SETSCOPE");
 512
 513    function pthread_attr_setinheritsched
 514      (attr            : access pthread_attr_t;
 515       inheritsched : int) return int;
 516    pragma Import (C, pthread_attr_setinheritsched,
 517                      "PTHREAD_ATTR_SETINHERITSCHED");
 518
 519    function pthread_attr_setschedpolicy
 520      (attr : access pthread_attr_t; policy : int) return int;
 521    pragma Import (C, pthread_attr_setschedpolicy,
 522                      "PTHREAD_ATTR_SETSCHEDPOLICY");
 523
 524    function pthread_attr_setschedparam
 525      (attr        : access pthread_attr_t;
 526       sched_param : int) return int;
 527    pragma Import (C, pthread_attr_setschedparam, "PTHREAD_ATTR_SETSCHEDPARAM");
 528
 529    function pthread_attr_setname_np
 530      (attr : access pthread_attr_t;
 531       name : System.Address;
 532       mbz  : System.Address) return int;
 533    pragma Import (C, pthread_attr_setname_np, "PTHREAD_ATTR_SETNAME_NP");
 534
 535    function sched_yield return int;
 536
 537    --------------------------
 538    -- P1003.1c  Section 16 --
 539    --------------------------
 540
 541    function pthread_attr_init (attributes : access pthread_attr_t) return int;
 542    pragma Import (C, pthread_attr_init, "PTHREAD_ATTR_INIT");
 543
 544    function pthread_attr_destroy
 545      (attributes : access pthread_attr_t) return int;
 546    pragma Import (C, pthread_attr_destroy, "PTHREAD_ATTR_DESTROY");
 547
 548    function pthread_attr_setdetachstate
 549      (attr        : access pthread_attr_t;
 550       detachstate : int) return int;
 551    pragma Import (C, pthread_attr_setdetachstate,
 552                      "PTHREAD_ATTR_SETDETACHSTATE");
 553
 554    function pthread_attr_setstacksize
 555      (attr      : access pthread_attr_t;
 556       stacksize : size_t) return int;
 557    pragma Import (C, pthread_attr_setstacksize, "PTHREAD_ATTR_SETSTACKSIZE");
 558
 559    function pthread_create
 560      (thread        : access pthread_t;
 561       attributes    : access pthread_attr_t;
 562       start_routine : Thread_Body;
 563       arg           : System.Address) return int;
 564    pragma Import (C, pthread_create, "PTHREAD_CREATE");
 565
 566    procedure pthread_exit (status : System.Address);
 567    pragma Import (C, pthread_exit, "PTHREAD_EXIT");
 568
 569    function pthread_self return pthread_t;
 570    pragma Import (C, pthread_self, "PTHREAD_SELF");
 571
 572    --------------------------
 573    -- POSIX.1c  Section 17 --
 574    --------------------------
 575
 576    function pthread_setspecific
 577      (key   : pthread_key_t;
 578       value : System.Address) return  int;
 579    pragma Import (C, pthread_setspecific, "PTHREAD_SETSPECIFIC");
 580
 581    function pthread_getspecific (key : pthread_key_t) return System.Address;
 582    pragma Import (C, pthread_getspecific, "PTHREAD_GETSPECIFIC");
 583
 584    type destructor_pointer is access procedure (arg : System.Address);
 585    pragma Convention (C, destructor_pointer);
 586
 587    function pthread_key_create
 588      (key        : access pthread_key_t;
 589       destructor : destructor_pointer) return int;
 590    pragma Import (C, pthread_key_create, "PTHREAD_KEY_CREATE");
 591
 592 private
 593
 594    type pid_t is new int;
 595
 596    type pthreadLongAddr_p is mod 2 ** Long_Integer'Size;
 597
 598    type pthreadLongAddr_t is mod 2 ** Long_Integer'Size;
 599    type pthreadLongAddr_t_ptr is mod 2 ** Long_Integer'Size;
 600
 601    type pthreadLongString_t is mod 2 ** Long_Integer'Size;
 602
 603    type pthreadLongUint_t is mod 2 ** Long_Integer'Size;
 604    type pthreadLongUint_array is array (Natural range <>)
 605      of pthreadLongUint_t;
 606
 607    type pthread_t is mod 2 ** Long_Integer'Size;
 608
 609    type pthread_cond_t is record
 610       state    : unsigned;
 611       valid    : unsigned;
 612       name     : pthreadLongString_t;
 613       arg      : unsigned;
 614       sequence : unsigned;
 615       block    : pthreadLongAddr_t_ptr;
 616    end record;
 617    for pthread_cond_t'Size use 8*32;
 618    pragma Convention (C, pthread_cond_t);
 619
 620    type pthread_attr_t is record
 621       valid    : long;
 622       name     : pthreadLongString_t;
 623       arg      : pthreadLongUint_t;
 624       reserved : pthreadLongUint_array (0 .. 18);
 625    end record;
 626    for pthread_attr_t'Size use 8*176;
 627    pragma Convention (C, pthread_attr_t);
 628
 629    type pthread_mutex_t is record
 630       lock     : unsigned;
 631       valid    : unsigned;
 632       name     : pthreadLongString_t;
 633       arg      : unsigned;
 634       sequence : unsigned;
 635       block    : pthreadLongAddr_p;
 636       owner    : unsigned;
 637       depth    : unsigned;
 638    end record;
 639    for pthread_mutex_t'Size use 8*40;
 640    pragma Convention (C, pthread_mutex_t);
 641
 642    type pthread_mutexattr_t is record
 643       valid    : long;
 644       reserved : pthreadLongUint_array (0 .. 14);
 645    end record;
 646    for pthread_mutexattr_t'Size use 8*128;
 647    pragma Convention (C, pthread_mutexattr_t);
 648
 649    type pthread_condattr_t is record
 650       valid    : long;
 651       reserved : pthreadLongUint_array (0 .. 12);
 652    end record;
 653    for pthread_condattr_t'Size use 8*112;
 654    pragma Convention (C, pthread_condattr_t);
 655
 656    type pthread_key_t is new unsigned;
 657
 658    pragma Inline (pthread_self);
 659
 660 end System.OS_Interface;