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att
GitHub Repository: att/ast
 Path: blob/master/src/lib/libast/sfio/sfextern.c
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/***********************************************************************

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*                                                                      *

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*               This software is part of the ast package               *

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*          Copyright (c) 1985-2011 AT&T Intellectual Property          *

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*                      and is licensed under the                       *

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*                 Eclipse Public License, Version 1.0                  *

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*                    by AT&T Intellectual Property                     *

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*                                                                      *

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*                A copy of the License is available at                 *

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*          http://www.eclipse.org/org/documents/epl-v10.html           *

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*         (with md5 checksum b35adb5213ca9657e911e9befb180842)         *

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*                                                                      *

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*              Information and Software Systems Research               *

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*                            AT&T Research                             *

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*                           Florham Park NJ                            *

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*                                                                      *

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*                 Glenn Fowler <[email protected]>                  *

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*                  David Korn <[email protected]>                   *

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*                   Phong Vo <[email protected]>                    *

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*                                                                      *

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***********************************************************************/

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#include	"sfhdr.h"

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/*	External variables and functions used only by Sfio

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**	Written by Kiem-Phong Vo

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*/

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/* code to initialize mutexes */

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static Vtmutex_t	Sfmutex;

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static Vtonce_t		Sfonce = VTONCE_INITDATA;

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static void _sfoncef()

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{	(void)vtmtxopen(_Sfmutex, VT_INIT);

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	(void)vtmtxopen(&_Sfpool.mutex, VT_INIT);

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	(void)vtmtxopen(sfstdin->mutex, VT_INIT);

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	(void)vtmtxopen(sfstdout->mutex, VT_INIT);

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	(void)vtmtxopen(sfstderr->mutex, VT_INIT);

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	_Sfdone = 1;

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}

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/* global variables used internally to the package */

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Sfextern_t _Sfextern =

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{	0,						/* _Sfpage	*/

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	{ NIL(Sfpool_t*), 0, 0, 0, NIL(Sfio_t**) },	/* _Sfpool	*/

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	NIL(int(*)_ARG_((Sfio_t*,int))),		/* _Sfpmove	*/

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	NIL(Sfio_t*(*)_ARG_((Sfio_t*, Sfio_t*))),	/* _Sfstack	*/

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	NIL(void(*)_ARG_((Sfio_t*, int, void*))),	/* _Sfnotify	*/

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	NIL(int(*)_ARG_((Sfio_t*))),			/* _Sfstdsync	*/

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	{ NIL(Sfread_f),				/* _Sfudisc	*/

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	  NIL(Sfwrite_f),

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	  NIL(Sfseek_f),

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	  NIL(Sfexcept_f),

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	  NIL(Sfdisc_t*)

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	},

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	NIL(void(*)_ARG_((void)) ),			/* _Sfcleanup	*/

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	0,						/* _Sfexiting	*/

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	0,						/* _Sfdone	*/

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	&Sfonce,					/* _Sfonce	*/

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	_sfoncef,					/* _Sfoncef	*/

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	&Sfmutex					/* _Sfmutex	*/

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};

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ssize_t	_Sfi = -1;		/* value for a few fast macro functions	*/

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ssize_t _Sfmaxr = 0;		/* default (unlimited) max record size	*/

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#if vt_threaded

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static Vtmutex_t	_Sfmtxin, _Sfmtxout, _Sfmtxerr;

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#define SFMTXIN		(&_Sfmtxin)

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#define SFMTXOUT	(&_Sfmtxout)

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#define SFMTXERR	(&_Sfmtxerr)

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#define SF_STDSAFE	SF_MTSAFE

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#else

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#define SFMTXIN		(0)

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#define SFMTXOUT	(0)

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#define SFMTXERR	(0)

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#define SF_STDSAFE	(0)

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#endif

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Sfio_t	_Sfstdin  = SFNEW(NIL(char*),-1,0,

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			  (SF_READ |SF_STATIC|SF_STDSAFE),NIL(Sfdisc_t*),SFMTXIN);

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Sfio_t	_Sfstdout = SFNEW(NIL(char*),-1,1,

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			  (SF_WRITE|SF_STATIC|SF_STDSAFE),NIL(Sfdisc_t*),SFMTXOUT);

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Sfio_t	_Sfstderr = SFNEW(NIL(char*),-1,2,

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			  (SF_WRITE|SF_STATIC|SF_STDSAFE),NIL(Sfdisc_t*),SFMTXERR);

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#undef	sfstdin

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#undef	sfstdout

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#undef	sfstderr

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Sfio_t*	sfstdin  = &_Sfstdin;

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Sfio_t*	sfstdout = &_Sfstdout;

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Sfio_t*	sfstderr = &_Sfstderr;

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__EXTERN__(ssize_t,_Sfi);

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__EXTERN__(Sfio_t,_Sfstdin);

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__EXTERN__(Sfio_t,_Sfstdout);

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__EXTERN__(Sfio_t,_Sfstderr);

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__EXTERN__(Sfio_t*,sfstdin);

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__EXTERN__(Sfio_t*,sfstdout);

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__EXTERN__(Sfio_t*,sfstderr);

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