gcc/ada/s-osinte-vxworks.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) 1995-2015, 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 3,  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.                                     --
  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 VxWorks version of this package
  34
  35 --  This package encapsulates all direct interfaces to OS services that are
  36 --  needed by the tasking run-time (libgnarl).
  37
  38 --  PLEASE DO NOT add any with-clauses to this package or remove the pragma
  39 --  Preelaborate. This package is designed to be a bottom-level (leaf) package.
  40
  41 with Interfaces.C;
  42 with System.VxWorks;
  43 with System.VxWorks.Ext;
  44 with System.Multiprocessors;
  45
  46 package System.OS_Interface is
  47    pragma Preelaborate;
  48
  49    subtype int             is Interfaces.C.int;
  50    subtype unsigned        is Interfaces.C.unsigned;
  51    subtype short           is Short_Integer;
  52    type unsigned_int       is mod 2 ** int'Size;
  53    type long               is new Long_Integer;
  54    type unsigned_long      is mod 2 ** long'Size;
  55    type long_long          is new Long_Long_Integer;
  56    type unsigned_long_long is mod 2 ** long_long'Size;
  57    type size_t             is mod 2 ** Standard'Address_Size;
  58
  59    -----------
  60    -- Errno --
  61    -----------
  62
  63    function errno return int;
  64    pragma Import (C, errno, "errnoGet");
  65
  66    EINTR     : constant := 4;
  67    EAGAIN    : constant := 35;
  68    ENOMEM    : constant := 12;
  69    EINVAL    : constant := 22;
  70    ETIMEDOUT : constant := 60;
  71
  72    FUNC_ERR  : constant := -1;
  73
  74    ----------------------------
  75    -- Signals and interrupts --
  76    ----------------------------
  77
  78    NSIG : constant := 64;
  79    --  Number of signals on the target OS
  80    type Signal is new int range 0 .. Interfaces.C."-" (NSIG, 1);
  81
  82    Max_HW_Interrupt : constant := System.VxWorks.Num_HW_Interrupts - 1;
  83    type HW_Interrupt is new int range 0 .. Max_HW_Interrupt;
  84
  85    Max_Interrupt : constant := Max_HW_Interrupt;
  86
  87    --  Signals common to Vxworks 5.x and 6.x
  88
  89    SIGILL    : constant :=  4; --  illegal instruction (not reset when caught)
  90    SIGABRT   : constant :=  6; --  used by abort, replace SIGIOT in the future
  91    SIGFPE    : constant :=  8; --  floating point exception
  92    SIGBUS    : constant := 10; --  bus error
  93    SIGSEGV   : constant := 11; --  segmentation violation
  94
  95    --  Signals specific to VxWorks 6.x
  96
  97    SIGHUP    : constant :=  1; --  hangup
  98    SIGINT    : constant :=  2; --  interrupt
  99    SIGQUIT   : constant :=  3; --  quit
 100    SIGTRAP   : constant :=  5; --  trace trap (not reset when caught)
 101    SIGEMT    : constant :=  7; --  EMT instruction
 102    SIGKILL   : constant :=  9; --  kill
 103    SIGFMT    : constant := 12; --  STACK FORMAT ERROR (not posix)
 104    SIGPIPE   : constant := 13; --  write on a pipe with no one to read it
 105    SIGALRM   : constant := 14; --  alarm clock
 106    SIGTERM   : constant := 15; --  software termination signal from kill
 107    SIGCNCL   : constant := 16; --  pthreads cancellation signal
 108    SIGSTOP   : constant := 17; --  sendable stop signal not from tty
 109    SIGTSTP   : constant := 18; --  stop signal from tty
 110    SIGCONT   : constant := 19; --  continue a stopped process
 111    SIGCHLD   : constant := 20; --  to parent on child stop or exit
 112    SIGTTIN   : constant := 21; --  to readers pgrp upon background tty read
 113    SIGTTOU   : constant := 22; --  like TTIN for output
 114
 115    SIGRES1   : constant := 23; --  reserved signal number (Not POSIX)
 116    SIGRES2   : constant := 24; --  reserved signal number (Not POSIX)
 117    SIGRES3   : constant := 25; --  reserved signal number (Not POSIX)
 118    SIGRES4   : constant := 26; --  reserved signal number (Not POSIX)
 119    SIGRES5   : constant := 27; --  reserved signal number (Not POSIX)
 120    SIGRES6   : constant := 28; --  reserved signal number (Not POSIX)
 121    SIGRES7   : constant := 29; --  reserved signal number (Not POSIX)
 122
 123    SIGUSR1   : constant := 30; --  user defined signal 1
 124    SIGUSR2   : constant := 31; --  user defined signal 2
 125
 126    SIGPOLL   : constant := 32; --  pollable event
 127    SIGPROF   : constant := 33; --  profiling timer expired
 128    SIGSYS    : constant := 34; --  bad system call
 129    SIGURG    : constant := 35; --  high bandwidth data is available at socket
 130    SIGVTALRM : constant := 36; --  virtual timer expired
 131    SIGXCPU   : constant := 37; --  CPU time limit exceeded
 132    SIGXFSZ   : constant := 38; --  file size time limit exceeded
 133
 134    SIGEVTS   : constant := 39; --  signal event thread send
 135    SIGEVTD   : constant := 40; --  signal event thread delete
 136
 137    SIGRTMIN  : constant := 48; --  Realtime signal min
 138    SIGRTMAX  : constant := 63; --  Realtime signal max
 139
 140    -----------------------------------
 141    -- Signal processing definitions --
 142    -----------------------------------
 143
 144    --  The how in sigprocmask()
 145
 146    SIG_BLOCK   : constant := 1;
 147    SIG_UNBLOCK : constant := 2;
 148    SIG_SETMASK : constant := 3;
 149
 150    --  The sa_flags in struct sigaction
 151
 152    SA_SIGINFO : constant := 16#0002#;
 153    SA_ONSTACK : constant := 16#0004#;
 154
 155    SIG_DFL : constant := 0;
 156    SIG_IGN : constant := 1;
 157
 158    type sigset_t is private;
 159
 160    type struct_sigaction is record
 161       sa_handler : System.Address;
 162       sa_mask    : sigset_t;
 163       sa_flags   : int;
 164    end record;
 165    pragma Convention (C, struct_sigaction);
 166    type struct_sigaction_ptr is access all struct_sigaction;
 167
 168    function sigaddset (set : access sigset_t; sig : Signal) return int;
 169    pragma Import (C, sigaddset, "sigaddset");
 170
 171    function sigdelset (set : access sigset_t; sig : Signal) return int;
 172    pragma Import (C, sigdelset, "sigdelset");
 173
 174    function sigfillset (set : access sigset_t) return int;
 175    pragma Import (C, sigfillset, "sigfillset");
 176
 177    function sigismember (set : access sigset_t; sig : Signal) return int;
 178    pragma Import (C, sigismember, "sigismember");
 179
 180    function sigemptyset (set : access sigset_t) return int;
 181    pragma Import (C, sigemptyset, "sigemptyset");
 182
 183    function sigaction
 184      (sig  : Signal;
 185       act  : struct_sigaction_ptr;
 186       oact : struct_sigaction_ptr) return int;
 187    pragma Import (C, sigaction, "sigaction");
 188
 189    type isr_address is access procedure (sig : int);
 190    pragma Convention (C, isr_address);
 191
 192    function c_signal (sig : Signal; handler : isr_address) return isr_address;
 193    pragma Import (C, c_signal, "signal");
 194
 195    function pthread_sigmask
 196      (how  : int;
 197       set  : access sigset_t;
 198       oset : access sigset_t) return int;
 199    pragma Import (C, pthread_sigmask, "sigprocmask");
 200
 201    subtype t_id is System.VxWorks.Ext.t_id;
 202    subtype Thread_Id is t_id;
 203    --  Thread_Id and t_id are VxWorks identifiers for tasks. This value,
 204    --  although represented as a Long_Integer, is in fact an address. With
 205    --  some BSPs, this address can have a value sufficiently high that the
 206    --  Thread_Id becomes negative: this should not be considered as an error.
 207
 208    function kill (pid : t_id; sig : Signal) return int;
 209    pragma Inline (kill);
 210
 211    function getpid return t_id renames System.VxWorks.Ext.getpid;
 212
 213    function Task_Stop (tid : t_id) return int
 214      renames System.VxWorks.Ext.Task_Stop;
 215    --  If we are in the kernel space, stop the task whose t_id is given in
 216    --  parameter in such a way that it can be examined by the debugger. This
 217    --  typically maps to taskSuspend on VxWorks 5 and to taskStop on VxWorks 6.
 218
 219    function Task_Cont (tid : t_id) return int
 220      renames System.VxWorks.Ext.Task_Cont;
 221    --  If we are in the kernel space, continue the task whose t_id is given
 222    --  in parameter if it has been stopped previously to be examined by the
 223    --  debugger (e.g. by taskStop). It typically maps to taskResume on VxWorks
 224    --  5 and to taskCont on VxWorks 6.
 225
 226    function Int_Lock return int renames System.VxWorks.Ext.Int_Lock;
 227    --  If we are in the kernel space, lock interrupts. It typically maps to
 228    --  intLock.
 229
 230    function Int_Unlock (Old : int) return int
 231      renames System.VxWorks.Ext.Int_Unlock;
 232    --  If we are in the kernel space, unlock interrupts. It typically maps to
 233    --  intUnlock. The parameter Old is only used on PowerPC where it contains
 234    --  the returned value from Int_Lock (the old MPSR).
 235
 236    ----------
 237    -- Time --
 238    ----------
 239
 240    type time_t is new unsigned_long;
 241
 242    type timespec is record
 243       ts_sec  : time_t;
 244       ts_nsec : long;
 245    end record;
 246    pragma Convention (C, timespec);
 247
 248    type clockid_t is new int;
 249
 250    function To_Duration (TS : timespec) return Duration;
 251    pragma Inline (To_Duration);
 252
 253    function To_Timespec (D : Duration) return timespec;
 254    pragma Inline (To_Timespec);
 255    --  Convert a Duration value to a timespec value. Note that in VxWorks,
 256    --  timespec is always non-negative (since time_t is defined above as
 257    --  unsigned long). This means that there is a potential problem if a
 258    --  negative argument is passed for D. However, in actual usage, the
 259    --  value of the input argument D is always non-negative, so no problem
 260    --  arises in practice.
 261
 262    function To_Clock_Ticks (D : Duration) return int;
 263    --  Convert a duration value (in seconds) into clock ticks
 264
 265    function clock_gettime
 266      (clock_id : clockid_t; tp : access timespec) return int;
 267    pragma Import (C, clock_gettime, "clock_gettime");
 268
 269    ----------------------
 270    -- Utility Routines --
 271    ----------------------
 272
 273    function To_VxWorks_Priority (Priority : int) return int;
 274    pragma Inline (To_VxWorks_Priority);
 275    --  Convenience routine to convert between VxWorks priority and Ada priority
 276
 277    --------------------------
 278    -- VxWorks specific API --
 279    --------------------------
 280
 281    subtype STATUS is int;
 282    --  Equivalent of the C type STATUS
 283
 284    OK    : constant STATUS := 0;
 285    ERROR : constant STATUS := Interfaces.C.int (-1);
 286
 287    function taskIdVerify (tid : t_id)  return STATUS;
 288    pragma Import (C, taskIdVerify, "taskIdVerify");
 289
 290    function taskIdSelf return t_id;
 291    pragma Import (C, taskIdSelf, "taskIdSelf");
 292
 293    function taskOptionsGet (tid : t_id; pOptions : access int) return int;
 294    pragma Import (C, taskOptionsGet, "taskOptionsGet");
 295
 296    function taskSuspend (tid : t_id) return int;
 297    pragma Import (C, taskSuspend, "taskSuspend");
 298
 299    function taskResume (tid : t_id) return int;
 300    pragma Import (C, taskResume, "taskResume");
 301
 302    function taskIsSuspended (tid : t_id) return int;
 303    pragma Import (C, taskIsSuspended, "taskIsSuspended");
 304
 305    function taskDelay (ticks : int) return int;
 306    procedure taskDelay (ticks : int);
 307    pragma Import (C, taskDelay, "taskDelay");
 308
 309    function sysClkRateGet return int;
 310    pragma Import (C, sysClkRateGet, "sysClkRateGet");
 311
 312    --  VxWorks 5.x specific functions
 313    --  Must not be called from run-time for versions that do not support
 314    --  taskVarLib: eg VxWorks 6 RTPs
 315
 316    function taskVarAdd
 317      (tid : t_id; pVar : access System.Address) return int;
 318    pragma Import (C, taskVarAdd, "taskVarAdd");
 319
 320    function taskVarDelete
 321      (tid : t_id; pVar : access System.Address) return int;
 322    pragma Import (C, taskVarDelete, "taskVarDelete");
 323
 324    function taskVarSet
 325      (tid   : t_id;
 326       pVar  : access System.Address;
 327       value : System.Address) return int;
 328    pragma Import (C, taskVarSet, "taskVarSet");
 329
 330    function taskVarGet
 331      (tid  : t_id;
 332       pVar : access System.Address) return int;
 333    pragma Import (C, taskVarGet, "taskVarGet");
 334
 335    --  VxWorks 6.x specific functions
 336
 337    --  Can only be called from the VxWorks 6 run-time libary that supports
 338    --  tlsLib, and not by the VxWorks 6.6 SMP library
 339
 340    function tlsKeyCreate return int;
 341    pragma Import (C, tlsKeyCreate, "tlsKeyCreate");
 342
 343    function tlsValueGet (key : int) return System.Address;
 344    pragma Import (C, tlsValueGet, "tlsValueGet");
 345
 346    function tlsValueSet (key : int; value : System.Address) return STATUS;
 347    pragma Import (C, tlsValueSet, "tlsValueSet");
 348
 349    --  Option flags for taskSpawn
 350
 351    VX_UNBREAKABLE    : constant := 16#0002#;
 352    VX_FP_PRIVATE_ENV : constant := 16#0080#;
 353    VX_NO_STACK_FILL  : constant := 16#0100#;
 354
 355    function taskSpawn
 356      (name          : System.Address;  --  Pointer to task name
 357       priority      : int;
 358       options       : int;
 359       stacksize     : size_t;
 360       start_routine : System.Address;
 361       arg1          : System.Address;
 362       arg2          : int := 0;
 363       arg3          : int := 0;
 364       arg4          : int := 0;
 365       arg5          : int := 0;
 366       arg6          : int := 0;
 367       arg7          : int := 0;
 368       arg8          : int := 0;
 369       arg9          : int := 0;
 370       arg10         : int := 0) return t_id;
 371    pragma Import (C, taskSpawn, "taskSpawn");
 372
 373    procedure taskDelete (tid : t_id);
 374    pragma Import (C, taskDelete, "taskDelete");
 375
 376    function Set_Time_Slice (ticks : int) return int
 377      renames System.VxWorks.Ext.Set_Time_Slice;
 378    --  Calls kernelTimeSlice under VxWorks 5.x, VxWorks 653, or in VxWorks 6
 379    --  kernel apps. Returns ERROR for RTPs, VxWorks 5 /CERT
 380
 381    function taskPriorityGet (tid : t_id; pPriority : access int) return int;
 382    pragma Import (C, taskPriorityGet, "taskPriorityGet");
 383
 384    function taskPrioritySet (tid : t_id; newPriority : int) return int;
 385    pragma Import (C, taskPrioritySet, "taskPrioritySet");
 386
 387    --  Semaphore creation flags
 388
 389    SEM_Q_FIFO         : constant := 0;
 390    SEM_Q_PRIORITY     : constant := 1;
 391    SEM_DELETE_SAFE    : constant := 4;  -- only valid for binary semaphore
 392    SEM_INVERSION_SAFE : constant := 8;  -- only valid for binary semaphore
 393
 394    --  Semaphore initial state flags
 395
 396    SEM_EMPTY : constant := 0;
 397    SEM_FULL  : constant := 1;
 398
 399    --  Semaphore take (semTake) time constants
 400
 401    WAIT_FOREVER : constant := -1;
 402    NO_WAIT      : constant := 0;
 403
 404    --  Error codes (errno). The lower level 16 bits are the error code, with
 405    --  the upper 16 bits representing the module number in which the error
 406    --  occurred. By convention, the module number is 0 for UNIX errors. VxWorks
 407    --  reserves module numbers 1-500, with the remaining module numbers being
 408    --  available for user applications.
 409
 410    M_objLib                 : constant := 61 * 2**16;
 411    --  semTake() failure with ticks = NO_WAIT
 412    S_objLib_OBJ_UNAVAILABLE : constant := M_objLib + 2;
 413    --  semTake() timeout with ticks > NO_WAIT
 414    S_objLib_OBJ_TIMEOUT     : constant := M_objLib + 4;
 415
 416    subtype SEM_ID is System.VxWorks.Ext.SEM_ID;
 417    --  typedef struct semaphore *SEM_ID;
 418
 419    --  We use two different kinds of VxWorks semaphores: mutex and binary
 420    --  semaphores. A null ID is returned when a semaphore cannot be created.
 421
 422    function semBCreate (options : int; initial_state : int) return SEM_ID;
 423    pragma Import (C, semBCreate, "semBCreate");
 424    --  Create a binary semaphore. Return ID, or 0 if memory could not
 425    --  be allocated.
 426
 427    function semMCreate (options : int) return SEM_ID;
 428    pragma Import (C, semMCreate, "semMCreate");
 429
 430    function semDelete (Sem : SEM_ID) return int
 431      renames System.VxWorks.Ext.semDelete;
 432    --  Delete a semaphore
 433
 434    function semGive (Sem : SEM_ID) return int;
 435    pragma Import (C, semGive, "semGive");
 436
 437    function semTake (Sem : SEM_ID; timeout : int) return int;
 438    pragma Import (C, semTake, "semTake");
 439    --  Attempt to take binary semaphore.  Error is returned if operation
 440    --  times out
 441
 442    function semFlush (SemID : SEM_ID) return STATUS;
 443    pragma Import (C, semFlush, "semFlush");
 444    --  Release all threads blocked on the semaphore
 445
 446    ------------------------------------------------------------
 447    --   Binary Semaphore Wrapper to Support interrupt Tasks  --
 448    ------------------------------------------------------------
 449
 450    type Binary_Semaphore_Id is new Long_Integer;
 451
 452    function Binary_Semaphore_Create return Binary_Semaphore_Id;
 453    pragma Inline (Binary_Semaphore_Create);
 454
 455    function Binary_Semaphore_Delete (ID : Binary_Semaphore_Id) return int;
 456    pragma Inline (Binary_Semaphore_Delete);
 457
 458    function Binary_Semaphore_Obtain (ID : Binary_Semaphore_Id) return int;
 459    pragma Inline (Binary_Semaphore_Obtain);
 460
 461    function Binary_Semaphore_Release (ID : Binary_Semaphore_Id) return int;
 462    pragma Inline (Binary_Semaphore_Release);
 463
 464    function Binary_Semaphore_Flush (ID : Binary_Semaphore_Id) return int;
 465    pragma Inline (Binary_Semaphore_Flush);
 466
 467    ------------------------------------------------------------
 468    -- Hardware Interrupt Wrappers to Support Interrupt Tasks --
 469    ------------------------------------------------------------
 470
 471    type Interrupt_Handler is access procedure (parameter : System.Address);
 472    pragma Convention (C, Interrupt_Handler);
 473
 474    type Interrupt_Vector is new System.Address;
 475
 476    function Interrupt_Connect
 477      (Vector    : Interrupt_Vector;
 478       Handler   : Interrupt_Handler;
 479       Parameter : System.Address := System.Null_Address) return int;
 480    pragma Inline (Interrupt_Connect);
 481    --  Use this to set up an user handler. The routine installs a user handler
 482    --  which is invoked after the OS has saved enough context for a high-level
 483    --  language routine to be safely invoked.
 484
 485    function Interrupt_Context return int;
 486    pragma Inline (Interrupt_Context);
 487    --  Return 1 if executing in an interrupt context; return 0 if executing in
 488    --  a task context.
 489
 490    function Interrupt_Number_To_Vector (intNum : int) return Interrupt_Vector;
 491    pragma Inline (Interrupt_Number_To_Vector);
 492    --  Convert a logical interrupt number to the hardware interrupt vector
 493    --  number used to connect the interrupt.
 494
 495    --------------------------------
 496    -- Processor Affinity for SMP --
 497    --------------------------------
 498
 499    function taskCpuAffinitySet (tid : t_id; CPU : int) return int
 500      renames System.VxWorks.Ext.taskCpuAffinitySet;
 501    --  For SMP run-times the affinity to CPU.
 502    --  For uniprocessor systems return ERROR status.
 503
 504    function taskMaskAffinitySet (tid : t_id; CPU_Set : unsigned) return int
 505      renames System.VxWorks.Ext.taskMaskAffinitySet;
 506    --  For SMP run-times the affinity to CPU_Set.
 507    --  For uniprocessor systems return ERROR status.
 508
 509    ---------------------
 510    -- Multiprocessors --
 511    ---------------------
 512
 513    function Current_CPU return Multiprocessors.CPU;
 514    --  Return the id of the current CPU
 515
 516 private
 517    type pid_t is new int;
 518
 519    ERROR_PID : constant pid_t := -1;
 520
 521    type sigset_t is new System.VxWorks.Ext.sigset_t;
 522 end System.OS_Interface;