usr/src/lib/libast/common/sfio/sfextern.c

   1 /***********************************************************************
   2 *                                                                      *
   3 *               This software is part of the ast package               *
   4 *          Copyright (c) 1985-2010 AT&T Intellectual Property          *
   5 *                      and is licensed under the                       *
   6 *                  Common Public License, Version 1.0                  *
   7 *                    by AT&T Intellectual Property                     *
   8 *                                                                      *
   9 *                A copy of the License is available at                 *
  10 *            http://www.opensource.org/licenses/cpl1.0.txt             *
  11 *         (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9)         *
  12 *                                                                      *
  13 *              Information and Software Systems Research               *
  14 *                            AT&T Research                             *
  15 *                           Florham Park NJ                            *
  16 *                                                                      *
  17 *                 Glenn Fowler <gsf@research.att.com>                  *
  18 *                  David Korn <dgk@research.att.com>                   *
  19 *                   Phong Vo <kpv@research.att.com>                    *
  20 *                                                                      *
  21 ***********************************************************************/
  22 #include        "sfhdr.h"
  23
  24 /*      External variables and functions used only by Sfio
  25 **      Written by Kiem-Phong Vo
  26 */
  27
  28 /* code to initialize mutexes */
  29 static Vtmutex_t        Sfmutex;
  30 static Vtonce_t         Sfonce = VTONCE_INITDATA;
  31 static void _sfoncef()
  32 {       (void)vtmtxopen(_Sfmutex, VT_INIT);
  33         (void)vtmtxopen(&_Sfpool.mutex, VT_INIT);
  34         (void)vtmtxopen(sfstdin->mutex, VT_INIT);
  35         (void)vtmtxopen(sfstdout->mutex, VT_INIT);
  36         (void)vtmtxopen(sfstderr->mutex, VT_INIT);
  37         _Sfdone = 1;
  38 }
  39
  40 /* global variables used internally to the package */
  41 Sfextern_t _Sfextern =
  42 {       0,                                              /* _Sfpage      */
  43         { NIL(Sfpool_t*), 0, 0, 0, NIL(Sfio_t**) },     /* _Sfpool      */
  44         NIL(int(*)_ARG_((Sfio_t*,int))),                /* _Sfpmove     */
  45         NIL(Sfio_t*(*)_ARG_((Sfio_t*, Sfio_t*))),       /* _Sfstack     */
  46         NIL(void(*)_ARG_((Sfio_t*, int, void*))),       /* _Sfnotify    */
  47         NIL(int(*)_ARG_((Sfio_t*))),                    /* _Sfstdsync   */
  48         { NIL(Sfread_f),                                /* _Sfudisc     */
  49           NIL(Sfwrite_f),
  50           NIL(Sfseek_f),
  51           NIL(Sfexcept_f),
  52           NIL(Sfdisc_t*)
  53         },
  54         NIL(void(*)_ARG_((void)) ),                     /* _Sfcleanup   */
  55         0,                                              /* _Sfexiting   */
  56         0,                                              /* _Sfdone      */
  57         &Sfonce,                                        /* _Sfonce      */
  58         _sfoncef,                                       /* _Sfoncef     */
  59         &Sfmutex                                        /* _Sfmutex     */
  60 };
  61
  62 ssize_t _Sfi = -1;              /* value for a few fast macro functions */
  63 #ifdef _ast_int8_t
  64 ssize_t _Sfmaxr = 256*1024;     /* default maximum size for a record    */
  65 #else
  66 ssize_t _Sfmaxr = 16*1024;      /* default maximum size for a record    */
  67 #endif
  68
  69 #if vt_threaded
  70 static Vtmutex_t        _Sfmtxin, _Sfmtxout, _Sfmtxerr;
  71 #define SFMTXIN         (&_Sfmtxin)
  72 #define SFMTXOUT        (&_Sfmtxout)
  73 #define SFMTXERR        (&_Sfmtxerr)
  74 #define SF_STDSAFE      SF_MTSAFE
  75 #else
  76 #define SFMTXIN         (0)
  77 #define SFMTXOUT        (0)
  78 #define SFMTXERR        (0)
  79 #define SF_STDSAFE      (0)
  80 #endif
  81
  82 Sfio_t  _Sfstdin  = SFNEW(NIL(char*),-1,0,
  83                           (SF_READ |SF_STATIC|SF_STDSAFE),NIL(Sfdisc_t*),SFMTXIN);
  84 Sfio_t  _Sfstdout = SFNEW(NIL(char*),-1,1,
  85                           (SF_WRITE|SF_STATIC|SF_STDSAFE),NIL(Sfdisc_t*),SFMTXOUT);
  86 Sfio_t  _Sfstderr = SFNEW(NIL(char*),-1,2,
  87                           (SF_WRITE|SF_STATIC|SF_STDSAFE),NIL(Sfdisc_t*),SFMTXERR);
  88
  89 #undef  sfstdin
  90 #undef  sfstdout
  91 #undef  sfstderr
  92
  93 Sfio_t* sfstdin  = &_Sfstdin;
  94 Sfio_t* sfstdout = &_Sfstdout;
  95 Sfio_t* sfstderr = &_Sfstderr;
  96
  97 __EXTERN__(ssize_t,_Sfi);
  98 __EXTERN__(Sfio_t,_Sfstdin);
  99 __EXTERN__(Sfio_t,_Sfstdout);
 100 __EXTERN__(Sfio_t,_Sfstderr);
 101 __EXTERN__(Sfio_t*,sfstdin);
 102 __EXTERN__(Sfio_t*,sfstdout);
 103 __EXTERN__(Sfio_t*,sfstderr);