1 /*********************************************************************** 2 * * 3 * This software is part of the ast package * 4 * Copyright (c) 1985-2008 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); 104