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) 1995-2007, 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 the VxWorks 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 System.VxWorks;
  45
  46 package System.OS_Interface is
  47    pragma Preelaborate;
  48
  49    subtype int        is Interfaces.C.int;
  50    subtype short      is Short_Integer;
  51    type unsigned_int  is mod 2 ** int'Size;
  52    type long          is new Long_Integer;
  53    type unsigned_long is mod 2 ** long'Size;
  54    type size_t        is mod 2 ** Standard'Address_Size;
  55
  56    -----------
  57    -- Errno --
  58    -----------
  59
  60    function errno return int;
  61    pragma Import (C, errno, "errnoGet");
  62
  63    EINTR     : constant := 4;
  64    EAGAIN    : constant := 35;
  65    ENOMEM    : constant := 12;
  66    EINVAL    : constant := 22;
  67    ETIMEDOUT : constant := 60;
  68
  69    FUNC_ERR  : constant := -1;
  70
  71    ----------------------------
  72    -- Signals and Interrupts --
  73    ----------------------------
  74
  75    NSIG : constant := 32;
  76    --  Number of signals on the target OS
  77    type Signal is new int range 0 .. Interfaces.C."-" (NSIG, 1);
  78
  79    Max_HW_Interrupt : constant := System.VxWorks.Num_HW_Interrupts - 1;
  80    type HW_Interrupt is new int range 0 .. Max_HW_Interrupt;
  81
  82    Max_Interrupt : constant := Max_HW_Interrupt;
  83
  84    SIGILL  : constant :=  4; --  illegal instruction (not reset)
  85    SIGABRT : constant :=  6; --  used by abort, replace SIGIOT in the future
  86    SIGFPE  : constant :=  8; --  floating point exception
  87    SIGBUS  : constant := 10; --  bus error
  88    SIGSEGV : constant := 11; --  segmentation violation
  89
  90    -----------------------------------
  91    -- Signal processing definitions --
  92    -----------------------------------
  93
  94    --  The how in sigprocmask()
  95
  96    SIG_BLOCK   : constant := 1;
  97    SIG_UNBLOCK : constant := 2;
  98    SIG_SETMASK : constant := 3;
  99
 100    --  The sa_flags in struct sigaction
 101
 102    SA_SIGINFO   : constant := 16#0002#;
 103    SA_ONSTACK   : constant := 16#0004#;
 104
 105    SIG_DFL : constant := 0;
 106    SIG_IGN : constant := 1;
 107
 108    type sigset_t is private;
 109
 110    type struct_sigaction is record
 111       sa_handler : System.Address;
 112       sa_mask    : sigset_t;
 113       sa_flags   : int;
 114    end record;
 115    pragma Convention (C, struct_sigaction);
 116    type struct_sigaction_ptr is access all struct_sigaction;
 117
 118    function sigaddset (set : access sigset_t; sig : Signal) return int;
 119    pragma Import (C, sigaddset, "sigaddset");
 120
 121    function sigdelset (set : access sigset_t; sig : Signal) return int;
 122    pragma Import (C, sigdelset, "sigdelset");
 123
 124    function sigfillset (set : access sigset_t) return int;
 125    pragma Import (C, sigfillset, "sigfillset");
 126
 127    function sigismember (set : access sigset_t; sig : Signal) return int;
 128    pragma Import (C, sigismember, "sigismember");
 129
 130    function sigemptyset (set : access sigset_t) return int;
 131    pragma Import (C, sigemptyset, "sigemptyset");
 132
 133    function sigaction
 134      (sig  : Signal;
 135       act  : struct_sigaction_ptr;
 136       oact : struct_sigaction_ptr) return int;
 137    pragma Import (C, sigaction, "sigaction");
 138
 139    type isr_address is access procedure (sig : int);
 140
 141    function c_signal (sig : Signal; handler : isr_address) return isr_address;
 142    pragma Import (C, c_signal, "signal");
 143
 144    function sigwait (set : access sigset_t; sig : access Signal) return int;
 145    pragma Inline (sigwait);
 146
 147    function pthread_sigmask
 148      (how  : int;
 149       set  : access sigset_t;
 150       oset : access sigset_t) return int;
 151    pragma Import (C, pthread_sigmask, "sigprocmask");
 152
 153    type t_id is new long;
 154    subtype Thread_Id is t_id;
 155
 156    function kill (pid : t_id; sig : Signal) return int;
 157    pragma Inline (kill);
 158
 159    function getpid return t_id;
 160    pragma Inline (getpid);
 161
 162    function Task_Stop (tid : t_id) return int;
 163    pragma Inline (Task_Stop);
 164    --  If we are in the kernel space, stop the task whose t_id is
 165    --  given in parameter in such a way that it can be examined by the
 166    --  debugger. This typically maps to taskSuspend on VxWorks 5 and
 167    --  to taskStop on VxWorks 6.
 168
 169    function Task_Cont (tid : t_id) return int;
 170    pragma Inline (Task_Cont);
 171    --  If we are in the kernel space, continue the task whose t_id is
 172    --  given in parameter if it has been stopped previously to be examined
 173    --  by the debugger (e.g. by taskStop). It typically maps to taskResume
 174    --  on VxWorks 5 and to taskCont on VxWorks 6.
 175
 176    function Int_Lock return int;
 177    pragma Inline (Int_Lock);
 178    --  If we are in the kernel space, lock interrupts. It typically maps to
 179    --  intLock.
 180
 181    function Int_Unlock return int;
 182    pragma Inline (Int_Unlock);
 183    --  If we are in the kernel space, unlock interrupts. It typically maps to
 184    --  intUnlock.
 185
 186    ----------
 187    -- Time --
 188    ----------
 189
 190    type time_t is new unsigned_long;
 191
 192    type timespec is record
 193       ts_sec  : time_t;
 194       ts_nsec : long;
 195    end record;
 196    pragma Convention (C, timespec);
 197
 198    type clockid_t is private;
 199
 200    CLOCK_REALTIME : constant clockid_t;   --  System wide realtime clock
 201
 202    function To_Duration (TS : timespec) return Duration;
 203    pragma Inline (To_Duration);
 204
 205    function To_Timespec (D : Duration) return timespec;
 206    pragma Inline (To_Timespec);
 207
 208    function To_Clock_Ticks (D : Duration) return int;
 209    --  Convert a duration value (in seconds) into clock ticks
 210
 211    function clock_gettime
 212      (clock_id : clockid_t; tp : access timespec) return int;
 213    pragma Import (C, clock_gettime, "clock_gettime");
 214
 215    type ULONG is new unsigned_long;
 216
 217    procedure tickSet (ticks : ULONG);
 218    pragma Import (C, tickSet, "tickSet");
 219
 220    function tickGet return ULONG;
 221    pragma Import (C, tickGet, "tickGet");
 222
 223    ----------------------
 224    -- Utility Routines --
 225    ----------------------
 226
 227    function To_VxWorks_Priority (Priority : int) return int;
 228    pragma Inline (To_VxWorks_Priority);
 229    --  Convenience routine to convert between VxWorks priority and Ada priority
 230
 231    --------------------------
 232    -- VxWorks specific API --
 233    --------------------------
 234
 235    subtype STATUS is int;
 236    --  Equivalent of the C type STATUS
 237
 238    OK    : constant STATUS := 0;
 239    ERROR : constant STATUS := Interfaces.C.int (-1);
 240
 241    function taskIdVerify (tid : t_id)  return STATUS;
 242    pragma Import (C, taskIdVerify, "taskIdVerify");
 243
 244    function taskIdSelf return t_id;
 245    pragma Import (C, taskIdSelf, "taskIdSelf");
 246
 247    function taskOptionsGet (tid : t_id; pOptions : access int) return int;
 248    pragma Import (C, taskOptionsGet, "taskOptionsGet");
 249
 250    function taskSuspend (tid : t_id) return int;
 251    pragma Import (C, taskSuspend, "taskSuspend");
 252
 253    function taskResume (tid : t_id) return int;
 254    pragma Import (C, taskResume, "taskResume");
 255
 256    function taskIsSuspended (tid : t_id) return int;
 257    pragma Import (C, taskIsSuspended, "taskIsSuspended");
 258
 259    function taskDelay (ticks : int) return int;
 260    procedure taskDelay (ticks : int);
 261    pragma Import (C, taskDelay, "taskDelay");
 262
 263    function sysClkRateGet return int;
 264    pragma Import (C, sysClkRateGet, "sysClkRateGet");
 265
 266    --  VxWorks 5.x specific functions
 267
 268    function taskVarAdd
 269      (tid : t_id; pVar : access System.Address) return int;
 270    pragma Import (C, taskVarAdd, "taskVarAdd");
 271
 272    function taskVarDelete
 273      (tid : t_id; pVar : access System.Address) return int;
 274    pragma Import (C, taskVarDelete, "taskVarDelete");
 275
 276    function taskVarSet
 277      (tid   : t_id;
 278       pVar  : access System.Address;
 279       value : System.Address) return int;
 280    pragma Import (C, taskVarSet, "taskVarSet");
 281
 282    function taskVarGet
 283      (tid  : t_id;
 284       pVar : access System.Address) return int;
 285    pragma Import (C, taskVarGet, "taskVarGet");
 286
 287    --  VxWorks 6.x specific functions
 288
 289    function tlsKeyCreate return int;
 290    pragma Import (C, tlsKeyCreate, "tlsKeyCreate");
 291
 292    function tlsValueGet (key : int) return System.Address;
 293    pragma Import (C, tlsValueGet, "tlsValueGet");
 294
 295    function tlsValueSet (key : int; value : System.Address) return STATUS;
 296    pragma Import (C, tlsValueSet, "tlsValueSet");
 297
 298    --  Option flags for taskSpawn
 299
 300    VX_UNBREAKABLE    : constant := 16#0002#;
 301    VX_FP_PRIVATE_ENV : constant := 16#0080#;
 302    VX_NO_STACK_FILL  : constant := 16#0100#;
 303
 304    function taskSpawn
 305      (name          : System.Address;  --  Pointer to task name
 306       priority      : int;
 307       options       : int;
 308       stacksize     : size_t;
 309       start_routine : System.Address;
 310       arg1          : System.Address;
 311       arg2          : int := 0;
 312       arg3          : int := 0;
 313       arg4          : int := 0;
 314       arg5          : int := 0;
 315       arg6          : int := 0;
 316       arg7          : int := 0;
 317       arg8          : int := 0;
 318       arg9          : int := 0;
 319       arg10         : int := 0) return t_id;
 320    pragma Import (C, taskSpawn, "taskSpawn");
 321
 322    procedure taskDelete (tid : t_id);
 323    pragma Import (C, taskDelete, "taskDelete");
 324
 325    function Set_Time_Slice (ticks : int) return int;
 326    pragma Inline (Set_Time_Slice);
 327    --  Calls kernelTimeSlice under VxWorks 5.x
 328    --  Do nothing under VxWorks 6.x
 329
 330    function taskPriorityGet (tid : t_id; pPriority : access int) return int;
 331    pragma Import (C, taskPriorityGet, "taskPriorityGet");
 332
 333    function taskPrioritySet (tid : t_id; newPriority : int) return int;
 334    pragma Import (C, taskPrioritySet, "taskPrioritySet");
 335
 336    --  Semaphore creation flags
 337
 338    SEM_Q_FIFO         : constant := 0;
 339    SEM_Q_PRIORITY     : constant := 1;
 340    SEM_DELETE_SAFE    : constant := 4;  -- only valid for binary semaphore
 341    SEM_INVERSION_SAFE : constant := 8;  -- only valid for binary semaphore
 342
 343    --  Semaphore initial state flags
 344
 345    SEM_EMPTY : constant := 0;
 346    SEM_FULL  : constant := 1;
 347
 348    --  Semaphore take (semTake) time constants
 349
 350    WAIT_FOREVER : constant := -1;
 351    NO_WAIT      : constant := 0;
 352
 353    --  Error codes (errno). The lower level 16 bits are the error code, with
 354    --  the upper 16 bits representing the module number in which the error
 355    --  occurred. By convention, the module number is 0 for UNIX errors. VxWorks
 356    --  reserves module numbers 1-500, with the remaining module numbers being
 357    --  available for user applications.
 358
 359    M_objLib                 : constant := 61 * 2**16;
 360    --  semTake() failure with ticks = NO_WAIT
 361    S_objLib_OBJ_UNAVAILABLE : constant := M_objLib + 2;
 362    --  semTake() timeout with ticks > NO_WAIT
 363    S_objLib_OBJ_TIMEOUT     : constant := M_objLib + 4;
 364
 365    type SEM_ID is new System.Address;
 366    --  typedef struct semaphore *SEM_ID;
 367
 368    --  We use two different kinds of VxWorks semaphores: mutex and binary
 369    --  semaphores. A null ID is returned when a semaphore cannot be created.
 370
 371    function semBCreate (options : int; initial_state : int) return SEM_ID;
 372    pragma Import (C, semBCreate, "semBCreate");
 373    --  Create a binary semaphore. Return ID, or 0 if memory could not
 374    --  be allocated.
 375
 376    function semMCreate (options : int) return SEM_ID;
 377    pragma Import (C, semMCreate, "semMCreate");
 378
 379    function semDelete (Sem : SEM_ID) return int;
 380    pragma Import (C, semDelete, "semDelete");
 381    --  Delete a semaphore
 382
 383    function semGive (Sem : SEM_ID) return int;
 384    pragma Import (C, semGive, "semGive");
 385
 386    function semTake (Sem : SEM_ID; timeout : int) return int;
 387    pragma Import (C, semTake, "semTake");
 388    --  Attempt to take binary semaphore.  Error is returned if operation
 389    --  times out
 390
 391    function semFlush (SemID : SEM_ID) return STATUS;
 392    pragma Import (C, semFlush, "semFlush");
 393    --  Release all threads blocked on the semaphore
 394
 395 private
 396    type sigset_t is new long;
 397
 398    type pid_t is new int;
 399
 400    ERROR_PID : constant pid_t := -1;
 401
 402    type clockid_t is new int;
 403    CLOCK_REALTIME : constant clockid_t := 0;
 404
 405 end System.OS_Interface;