gcc/ada/libgnarl/s-osinte__rtems.ads

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                GNU ADA RUN-TIME LIBRARY (GNARL) COMPONENTS               --
   4 --                                                                          --
   5 --                   S Y S T E M . O S _ I N T E R F A C E                  --
   6 --                                                                          --
   7 --                                   S p e c                                --
   8 --                                                                          --
   9 --          Copyright (C) 1997-2024, Free Software Foundation, Inc.         --
  10 --                                                                          --
  11 -- GNARL 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 -- The GNARL files that were developed for RTEMS are maintained by  On-Line --
  31 -- Applications Research Corporation (http://www.oarcorp.com)  in  coopera- --
  32 -- tion with Ada Core Technologies Inc. and Florida State University.       --
  33 --                                                                          --
  34 ------------------------------------------------------------------------------
  35
  36 --  This is the RTEMS version of this package.
  37 --
  38 --  RTEMS target names are of the form CPU-rtems.
  39 --  This implementation is designed to work on ALL RTEMS targets.
  40 --  The RTEMS implementation is primarily based upon the POSIX threads
  41 --  API but there are also bindings to GNAT/RTEMS support routines
  42 --  to insulate this code from C API specific details and, in some
  43 --  cases, obtain target architecture and BSP specific information
  44 --  that is unavailable at the time this package is built.
  45
  46 --  This package encapsulates all direct interfaces to OS services
  47 --  that are needed by children of System.
  48
  49 --  PLEASE DO NOT add any with-clauses to this package
  50 --  or remove the pragma Preelaborate.
  51 --  It is designed to be a bottom-level (leaf) package.
  52
  53 with Interfaces.C;
  54 with System.OS_Constants;
  55 with System.Parameters;
  56
  57 package System.OS_Interface is
  58    pragma Preelaborate;
  59
  60    --  This interface assumes that "unsigned" is a 32-bit entity.  This
  61    --  will correspond to RTEMS object ids.
  62
  63    subtype rtems_id       is Interfaces.C.unsigned;
  64
  65    subtype int            is Interfaces.C.int;
  66    subtype char           is Interfaces.C.char;
  67    subtype short          is Interfaces.C.short;
  68    subtype long           is Interfaces.C.long;
  69    subtype unsigned       is Interfaces.C.unsigned;
  70    subtype unsigned_short is Interfaces.C.unsigned_short;
  71    subtype unsigned_long  is Interfaces.C.unsigned_long;
  72    subtype unsigned_char  is Interfaces.C.unsigned_char;
  73    subtype plain_char     is Interfaces.C.plain_char;
  74    subtype size_t         is Interfaces.C.size_t;
  75    -----------
  76    -- Errno --
  77    -----------
  78
  79    function errno return int;
  80    pragma Import (C, errno, "__get_errno");
  81
  82    EAGAIN    : constant := System.OS_Constants.EAGAIN;
  83    EINTR     : constant := System.OS_Constants.EINTR;
  84    EINVAL    : constant := System.OS_Constants.EINVAL;
  85    ENOMEM    : constant := System.OS_Constants.ENOMEM;
  86    ETIMEDOUT : constant := System.OS_Constants.ETIMEDOUT;
  87
  88    ----------------------------
  89    -- Signals and Interrupts --
  90    ----------------------------
  91
  92    NSIG : constant := 64;
  93    --  Number of signals on the target OS
  94    type Signal is new int range 0 .. Interfaces.C."-" (NSIG, 1);
  95
  96    Max_HW_Interrupt : constant := 255;
  97    type HW_Interrupt is new int range 0 .. Max_HW_Interrupt;
  98
  99    Max_Interrupt : constant := Max_HW_Interrupt;
 100    subtype Interrupt_Range is Natural range 0 .. Max_HW_Interrupt;
 101    --  For s-interr
 102
 103    SIGXCPU     : constant := 0; --  XCPU
 104    SIGHUP      : constant := 1; --  hangup
 105    SIGINT      : constant := 2; --  interrupt (rubout)
 106    SIGQUIT     : constant := 3; --  quit (ASCD FS)
 107    SIGILL      : constant := 4; --  illegal instruction (not reset)
 108    SIGTRAP     : constant := 5; --  trace trap (not reset)
 109    SIGIOT      : constant := 6; --  IOT instruction
 110    SIGABRT     : constant := 6; --  used by abort, replace SIGIOT in the future
 111    SIGEMT      : constant := 7; --  EMT instruction
 112    SIGFPE      : constant := 8; --  floating point exception
 113    SIGKILL     : constant := 9; --  kill (cannot be caught or ignored)
 114    SIGBUS      : constant := 10; --  bus error
 115    SIGSEGV     : constant := 11; --  segmentation violation
 116    SIGSYS      : constant := 12; --  bad argument to system call
 117    SIGPIPE     : constant := 13; --  write on a pipe with no one to read it
 118    SIGALRM     : constant := 14; --  alarm clock
 119    SIGTERM     : constant := 15; --  software termination signal from kill
 120    SIGUSR1     : constant := 16; --  user defined signal 1
 121    SIGUSR2     : constant := 17; --  user defined signal 2
 122
 123    SIGADAABORT : constant := SIGABRT;
 124
 125    type Signal_Set is array (Natural range <>) of Signal;
 126
 127    Unmasked    : constant Signal_Set := (SIGTRAP, SIGALRM, SIGEMT);
 128    Reserved    : constant Signal_Set := (1 .. 1 => SIGKILL);
 129
 130    type sigset_t is private;
 131
 132    function sigaddset (set : access sigset_t; sig : Signal) return int;
 133    pragma Import (C, sigaddset, "sigaddset");
 134
 135    function sigdelset (set : access sigset_t; sig : Signal) return int;
 136    pragma Import (C, sigdelset, "sigdelset");
 137
 138    function sigfillset (set : access sigset_t) return int;
 139    pragma Import (C, sigfillset, "sigfillset");
 140
 141    function sigismember (set : access sigset_t; sig : Signal) return int;
 142    pragma Import (C, sigismember, "sigismember");
 143
 144    function sigemptyset (set : access sigset_t) return int;
 145    pragma Import (C, sigemptyset, "sigemptyset");
 146
 147    type struct_sigaction is record
 148       sa_flags   : int;
 149       sa_mask    : sigset_t;
 150       sa_handler : System.Address;
 151    end record;
 152    pragma Convention (C, struct_sigaction);
 153    type struct_sigaction_ptr is access all struct_sigaction;
 154
 155    SA_SIGINFO  : constant := 16#02#;
 156
 157    SA_ONSTACK : constant := 16#00#;
 158    --  SA_ONSTACK is not defined on RTEMS, but it is referred to in the POSIX
 159    --  implementation of System.Interrupt_Management. Therefore we define a
 160    --  dummy value of zero here so that setting this flag is a nop.
 161
 162    SIG_BLOCK   : constant := 1;
 163    SIG_UNBLOCK : constant := 2;
 164    SIG_SETMASK : constant := 3;
 165
 166    SIG_DFL : constant := 0;
 167    SIG_IGN : constant := 1;
 168
 169    function sigaction
 170      (sig  : Signal;
 171       act  : struct_sigaction_ptr;
 172       oact : struct_sigaction_ptr) return int;
 173    pragma Import (C, sigaction, "sigaction");
 174
 175    ----------
 176    -- Time --
 177    ----------
 178
 179    Time_Slice_Supported : constant Boolean := True;
 180    --  Indicates whether time slicing is supported (i.e SCHED_RR is supported)
 181
 182    type timespec is private;
 183
 184    type clockid_t is new int;
 185
 186    CLOCK_REALTIME  : constant clockid_t;
 187    CLOCK_MONOTONIC : constant clockid_t;
 188
 189    function clock_gettime
 190      (clock_id : clockid_t;
 191       tp       : access timespec) return int;
 192    pragma Import (C, clock_gettime, "clock_gettime");
 193
 194    function clock_getres
 195      (clock_id : clockid_t;
 196       res      : access timespec) return int;
 197    pragma Import (C, clock_getres, "clock_getres");
 198
 199    function To_Duration (TS : timespec) return Duration;
 200    pragma Inline (To_Duration);
 201
 202    function To_Timespec (D : Duration) return timespec;
 203    pragma Inline (To_Timespec);
 204
 205    -------------------------
 206    -- Priority Scheduling --
 207    -------------------------
 208
 209    SCHED_FIFO  : constant := 1;
 210    SCHED_RR    : constant := 2;
 211    SCHED_OTHER : constant := 0;
 212
 213    function To_Target_Priority
 214      (Prio : System.Any_Priority) return Interfaces.C.int;
 215    --  Maps System.Any_Priority to a POSIX priority
 216
 217    -------------
 218    -- Process --
 219    -------------
 220
 221    type pid_t is private;
 222
 223    function kill (pid : pid_t; sig : Signal) return int;
 224    pragma Import (C, kill, "kill");
 225
 226    function getpid return pid_t;
 227    pragma Import (C, getpid, "getpid");
 228
 229    ---------
 230    -- LWP --
 231    ---------
 232
 233    function lwp_self return System.Address;
 234    --  lwp_self does not exist on this thread library, revert to pthread_self
 235    --  which is the closest approximation (with getpid). This function is
 236    --  needed to share 7staprop.adb across POSIX-like targets.
 237    pragma Import (C, lwp_self, "pthread_self");
 238
 239    -------------
 240    -- Threads --
 241    -------------
 242
 243    type Thread_Body is access
 244      function (arg : System.Address) return System.Address;
 245    pragma Convention (C, Thread_Body);
 246
 247    type pthread_t           is private;
 248    subtype Thread_Id        is pthread_t;
 249
 250    type pthread_mutex_t      is limited private;
 251    type pthread_rwlock_t     is limited private;
 252    type pthread_cond_t       is limited private;
 253    type pthread_attr_t       is limited private;
 254    type pthread_mutexattr_t  is limited private;
 255    type pthread_rwlockattr_t is limited private;
 256    type pthread_condattr_t   is limited private;
 257    type pthread_key_t        is private;
 258
 259    No_Key : constant pthread_key_t;
 260
 261    PTHREAD_CREATE_DETACHED : constant := 0;
 262
 263    PTHREAD_SCOPE_PROCESS : constant := 0;
 264    PTHREAD_SCOPE_SYSTEM  : constant := 1;
 265
 266    -----------
 267    -- Stack --
 268    -----------
 269
 270    type stack_t is record
 271       ss_sp    : System.Address;
 272       ss_flags : int;
 273       ss_size  : size_t;
 274    end record;
 275    pragma Convention (C, stack_t);
 276
 277    function sigaltstack
 278      (ss  : not null access stack_t;
 279       oss : access stack_t) return int;
 280
 281    Alternate_Stack : aliased System.Address;
 282    --  This is a dummy definition, never used (Alternate_Stack_Size is null)
 283
 284    Alternate_Stack_Size : constant := 0;
 285    --  No alternate signal stack is used on this platform
 286
 287    Stack_Base_Available : constant Boolean := False;
 288    --  Indicates whether the stack base is available on this target.
 289    --  This allows us to share s-osinte.adb between all the FSU/RTEMS
 290    --  run time.
 291    --  Note that this value can only be true if pthread_t has a complete
 292    --  definition that corresponds exactly to the C header files.
 293
 294    function Get_Stack_Base (thread : pthread_t) return Address;
 295    pragma Inline (Get_Stack_Base);
 296    --  returns the stack base of the specified thread.
 297    --  Only call this function when Stack_Base_Available is True.
 298
 299    --  These two functions are only needed to share s-taprop.adb with
 300    --  FSU threads.
 301
 302    function Get_Page_Size return int;
 303    pragma Import (C, Get_Page_Size, "getpagesize");
 304    --  Returns the size of a page
 305
 306    PROT_ON  : constant := 0;
 307    PROT_OFF : constant := 0;
 308
 309    function mprotect (addr : Address; len : size_t; prot : int) return int;
 310    pragma Import (C, mprotect);
 311
 312    -----------------------------------------
 313    --  Nonstandard Thread Initialization  --
 314    -----------------------------------------
 315
 316    procedure pthread_init;
 317    --  FSU_THREADS requires pthread_init, which is nonstandard
 318    --  and this should be invoked during the elaboration of s-taprop.adb
 319    --
 320    --  RTEMS does not require this so we provide an empty Ada body.
 321
 322    -------------------------
 323    -- POSIX.1c  Section 3 --
 324    -------------------------
 325
 326    function sigwait
 327      (set : access sigset_t;
 328       sig : access Signal) return int;
 329    pragma Import (C, sigwait, "sigwait");
 330
 331    function pthread_kill
 332      (thread : pthread_t;
 333       sig    : Signal) return int;
 334    pragma Import (C, pthread_kill, "pthread_kill");
 335
 336    function pthread_sigmask
 337      (how  : int;
 338       set  : access sigset_t;
 339       oset : access sigset_t) return int;
 340    pragma Import (C, pthread_sigmask, "pthread_sigmask");
 341
 342    ----------------------------
 343    --  POSIX.1c  Section 11  --
 344    ----------------------------
 345
 346    function pthread_mutexattr_init
 347      (attr : access pthread_mutexattr_t) return int;
 348    pragma Import (C, pthread_mutexattr_init, "pthread_mutexattr_init");
 349
 350    function pthread_mutexattr_destroy
 351      (attr : access pthread_mutexattr_t) return int;
 352    pragma Import (C, pthread_mutexattr_destroy, "pthread_mutexattr_destroy");
 353
 354    function pthread_mutex_init
 355      (mutex : access pthread_mutex_t;
 356       attr  : access pthread_mutexattr_t) return int;
 357    pragma Import (C, pthread_mutex_init, "pthread_mutex_init");
 358
 359    function pthread_mutex_destroy (mutex : access pthread_mutex_t) return int;
 360    pragma Import (C, pthread_mutex_destroy, "pthread_mutex_destroy");
 361
 362    function pthread_mutex_lock (mutex : access pthread_mutex_t) return int;
 363    pragma Import (C, pthread_mutex_lock, "pthread_mutex_lock");
 364
 365    function pthread_mutex_unlock (mutex : access pthread_mutex_t) return int;
 366    pragma Import (C, pthread_mutex_unlock, "pthread_mutex_unlock");
 367
 368    function pthread_rwlockattr_init
 369      (attr : access pthread_rwlockattr_t) return int;
 370    pragma Import (C, pthread_rwlockattr_init, "pthread_rwlockattr_init");
 371
 372    function pthread_rwlockattr_destroy
 373      (attr : access pthread_rwlockattr_t) return int;
 374    pragma Import (C, pthread_rwlockattr_destroy, "pthread_rwlockattr_destroy");
 375
 376    PTHREAD_RWLOCK_PREFER_READER_NP              : constant := 0;
 377    PTHREAD_RWLOCK_PREFER_WRITER_NP              : constant := 1;
 378    PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP : constant := 2;
 379
 380    function pthread_rwlockattr_setkind_np
 381      (attr : access pthread_rwlockattr_t;
 382       pref : int) return int;
 383
 384    function pthread_rwlock_init
 385      (mutex : access pthread_rwlock_t;
 386       attr  : access pthread_rwlockattr_t) return int;
 387    pragma Import (C, pthread_rwlock_init, "pthread_rwlock_init");
 388
 389    function pthread_rwlock_destroy
 390      (mutex : access pthread_rwlock_t) return int;
 391    pragma Import (C, pthread_rwlock_destroy, "pthread_rwlock_destroy");
 392
 393    function pthread_rwlock_rdlock (mutex : access pthread_rwlock_t) return int;
 394    pragma Import (C, pthread_rwlock_rdlock, "pthread_rwlock_rdlock");
 395
 396    function pthread_rwlock_wrlock (mutex : access pthread_rwlock_t) return int;
 397    pragma Import (C, pthread_rwlock_wrlock, "pthread_rwlock_wrlock");
 398
 399    function pthread_rwlock_unlock (mutex : access pthread_rwlock_t) return int;
 400    pragma Import (C, pthread_rwlock_unlock, "pthread_rwlock_unlock");
 401
 402    function pthread_condattr_init
 403      (attr : access pthread_condattr_t) return int;
 404    pragma Import (C, pthread_condattr_init, "pthread_condattr_init");
 405
 406    function pthread_condattr_destroy
 407      (attr : access pthread_condattr_t) return int;
 408    pragma Import (C, pthread_condattr_destroy, "pthread_condattr_destroy");
 409
 410    function pthread_cond_init
 411      (cond : access pthread_cond_t;
 412       attr : access pthread_condattr_t) return int;
 413    pragma Import (C, pthread_cond_init, "pthread_cond_init");
 414
 415    function pthread_cond_destroy (cond : access pthread_cond_t) return int;
 416    pragma Import (C, pthread_cond_destroy, "pthread_cond_destroy");
 417
 418    function pthread_cond_signal (cond : access pthread_cond_t) return int;
 419    pragma Import (C, pthread_cond_signal, "pthread_cond_signal");
 420
 421    function pthread_cond_wait
 422      (cond  : access pthread_cond_t;
 423       mutex : access pthread_mutex_t) return int;
 424    pragma Import (C, pthread_cond_wait, "pthread_cond_wait");
 425
 426    function pthread_cond_timedwait
 427      (cond    : access pthread_cond_t;
 428       mutex   : access pthread_mutex_t;
 429       abstime : access timespec) return int;
 430    pragma Import (C, pthread_cond_timedwait, "pthread_cond_timedwait");
 431
 432    --------------------------
 433    -- POSIX.1c  Section 13 --
 434    --------------------------
 435
 436    PTHREAD_PRIO_NONE    : constant := 0;
 437    PTHREAD_PRIO_PROTECT : constant := 2;
 438    PTHREAD_PRIO_INHERIT : constant := 1;
 439
 440    function pthread_mutexattr_setprotocol
 441      (attr     : access pthread_mutexattr_t;
 442       protocol : int) return int;
 443    pragma Import (C, pthread_mutexattr_setprotocol);
 444
 445    function pthread_mutexattr_setprioceiling
 446      (attr     : access pthread_mutexattr_t;
 447       prioceiling : int) return int;
 448    pragma Import
 449      (C, pthread_mutexattr_setprioceiling,
 450       "pthread_mutexattr_setprioceiling");
 451
 452    type struct_sched_param is record
 453       sched_priority      : int;
 454       ss_low_priority     : int;
 455       ss_replenish_period : timespec;
 456       ss_initial_budget   : timespec;
 457       sched_ss_max_repl   : int;
 458    end record;
 459    pragma Convention (C, struct_sched_param);
 460
 461    function pthread_setschedparam
 462      (thread : pthread_t;
 463       policy : int;
 464       param  : access struct_sched_param) return int;
 465    pragma Import (C, pthread_setschedparam, "pthread_setschedparam");
 466
 467    function pthread_attr_setscope
 468      (attr            : access pthread_attr_t;
 469       contentionscope : int) return int;
 470    pragma Import (C, pthread_attr_setscope, "pthread_attr_setscope");
 471
 472    function pthread_attr_setinheritsched
 473      (attr         : access pthread_attr_t;
 474       inheritsched : int) return int;
 475    pragma Import (C, pthread_attr_setinheritsched);
 476
 477    function pthread_attr_setschedpolicy
 478      (attr   : access pthread_attr_t;
 479       policy : int) return int;
 480    pragma Import (C, pthread_attr_setschedpolicy);
 481
 482    function pthread_attr_setschedparam
 483      (attr        : access pthread_attr_t;
 484       sched_param : int) return int;
 485    pragma Import (C, pthread_attr_setschedparam);
 486
 487    function sched_yield return int;
 488    pragma Import (C, sched_yield, "sched_yield");
 489
 490    ---------------------------
 491    -- P1003.1c - Section 16 --
 492    ---------------------------
 493
 494    function pthread_attr_init (attributes : access pthread_attr_t) return int;
 495    pragma Import (C, pthread_attr_init, "pthread_attr_init");
 496
 497    function pthread_attr_destroy
 498      (attributes : access pthread_attr_t) return int;
 499    pragma Import (C, pthread_attr_destroy, "pthread_attr_destroy");
 500
 501    function pthread_attr_setdetachstate
 502      (attr        : access pthread_attr_t;
 503       detachstate : int) return int;
 504    pragma Import (C, pthread_attr_setdetachstate);
 505
 506    function pthread_attr_setstacksize
 507      (attr      : access pthread_attr_t;
 508       stacksize : size_t) return int;
 509    pragma Import (C, pthread_attr_setstacksize, "pthread_attr_setstacksize");
 510
 511    function pthread_create
 512      (thread        : access pthread_t;
 513       attributes    : access pthread_attr_t;
 514       start_routine : Thread_Body;
 515       arg           : System.Address) return int;
 516    pragma Import (C, pthread_create, "pthread_create");
 517
 518    procedure pthread_exit (status : System.Address);
 519    pragma Import (C, pthread_exit, "pthread_exit");
 520
 521    function pthread_self return pthread_t;
 522    pragma Import (C, pthread_self, "pthread_self");
 523
 524    --------------------------
 525    -- POSIX.1c  Section 17 --
 526    --------------------------
 527
 528    function pthread_setspecific
 529      (key   : pthread_key_t;
 530       value : System.Address) return int;
 531    pragma Import (C, pthread_setspecific, "pthread_setspecific");
 532
 533    function pthread_getspecific (key : pthread_key_t) return System.Address;
 534    pragma Import (C, pthread_getspecific, "pthread_getspecific");
 535
 536    type destructor_pointer is access procedure (arg : System.Address);
 537    pragma Convention (C, destructor_pointer);
 538
 539    function pthread_key_create
 540      (key        : access pthread_key_t;
 541       destructor : destructor_pointer) return int;
 542    pragma Import (C, pthread_key_create, "pthread_key_create");
 543
 544    ------------------------------------------------------------
 545    --   Binary Semaphore Wrapper to Support Interrupt Tasks  --
 546    ------------------------------------------------------------
 547
 548    type Binary_Semaphore_Id is new rtems_id;
 549
 550    function Binary_Semaphore_Create return Binary_Semaphore_Id;
 551    pragma Inline (Binary_Semaphore_Create);
 552
 553    function Binary_Semaphore_Delete (ID : Binary_Semaphore_Id) return int;
 554    pragma Inline (Binary_Semaphore_Delete);
 555
 556    function Binary_Semaphore_Obtain (ID : Binary_Semaphore_Id) return int;
 557    pragma Inline (Binary_Semaphore_Obtain);
 558
 559    function Binary_Semaphore_Release (ID : Binary_Semaphore_Id) return int;
 560    pragma Inline (Binary_Semaphore_Release);
 561
 562    function Binary_Semaphore_Flush (ID : Binary_Semaphore_Id) return int;
 563    pragma Inline (Binary_Semaphore_Flush);
 564
 565    ------------------------------------------------------------
 566    -- Hardware Interrupt Wrappers to Support Interrupt Tasks --
 567    ------------------------------------------------------------
 568
 569    type Interrupt_Handler is access procedure (parameter : System.Address);
 570    pragma Convention (C, Interrupt_Handler);
 571
 572    type Interrupt_Vector is new System.Address;
 573
 574    function Interrupt_Connect
 575      (Vector    : Interrupt_Vector;
 576       Handler   : Interrupt_Handler;
 577       Parameter : System.Address := System.Null_Address) return int;
 578    --  Use this to set up an user handler. The routine installs a
 579    --  a user handler which is invoked after RTEMS has saved enough
 580    --  context for a high-level language routine to be safely invoked.
 581
 582    function Interrupt_Number_To_Vector (intNum : int) return Interrupt_Vector;
 583    --  Convert a logical interrupt number to the hardware interrupt vector
 584    --  number used to connect the interrupt.
 585
 586 private
 587
 588    type sigset_t is new unsigned_long;
 589
 590    type pid_t is new int;
 591
 592    type time_t is range -2 ** (System.Parameters.time_t_bits - 1)
 593      .. 2 ** (System.Parameters.time_t_bits - 1) - 1;
 594
 595    type timespec is record
 596       tv_sec  : time_t;
 597       tv_nsec : long;
 598    end record;
 599    pragma Convention (C, timespec);
 600
 601    CLOCK_REALTIME :  constant clockid_t := System.OS_Constants.CLOCK_REALTIME;
 602    CLOCK_MONOTONIC : constant clockid_t := System.OS_Constants.CLOCK_MONOTONIC;
 603
 604    subtype char_array is Interfaces.C.char_array;
 605
 606    type pthread_attr_t is record
 607       Data : char_array (1 .. OS_Constants.PTHREAD_ATTR_SIZE);
 608    end record;
 609    pragma Convention (C, pthread_attr_t);
 610    for pthread_attr_t'Alignment use Interfaces.C.double'Alignment;
 611
 612    type pthread_condattr_t is record
 613       Data : char_array (1 .. OS_Constants.PTHREAD_CONDATTR_SIZE);
 614    end record;
 615    pragma Convention (C, pthread_condattr_t);
 616    for pthread_condattr_t'Alignment use Interfaces.C.double'Alignment;
 617
 618    type pthread_mutexattr_t is record
 619       Data : char_array (1 .. OS_Constants.PTHREAD_MUTEXATTR_SIZE);
 620    end record;
 621    pragma Convention (C, pthread_mutexattr_t);
 622    for pthread_mutexattr_t'Alignment use Interfaces.C.int'Alignment;
 623
 624    type pthread_rwlockattr_t is record
 625       Data : char_array (1 .. OS_Constants.PTHREAD_RWLOCKATTR_SIZE);
 626    end record;
 627    pragma Convention (C, pthread_rwlockattr_t);
 628    for pthread_rwlockattr_t'Alignment use Interfaces.C.int'Alignment;
 629
 630    type pthread_t is new rtems_id;
 631
 632    type pthread_mutex_t is record
 633       Data : char_array (1 .. OS_Constants.PTHREAD_MUTEX_SIZE);
 634    end record;
 635    pragma Convention (C, pthread_mutex_t);
 636    for pthread_mutex_t'Alignment use Interfaces.C.double'Alignment;
 637
 638    type pthread_rwlock_t is record
 639       Data : char_array (1 .. OS_Constants.PTHREAD_RWLOCK_SIZE);
 640    end record;
 641    pragma Convention (C, pthread_rwlock_t);
 642    for pthread_rwlock_t'Alignment use Interfaces.C.size_t'Alignment;
 643
 644    type pthread_cond_t is record
 645       Data : char_array (1 .. OS_Constants.PTHREAD_COND_SIZE);
 646    end record;
 647    pragma Convention (C, pthread_cond_t);
 648    for pthread_cond_t'Alignment use Interfaces.C.size_t'Alignment;
 649
 650    type pthread_key_t is new rtems_id;
 651
 652    No_Key : constant pthread_key_t := 0;
 653
 654 end System.OS_Interface;