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Tricks of the Windows Gam…ming Gurus (2nd Edition)
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Disc2.iso
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vc98
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crt
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closeall.c
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C/C++ Source or Header
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1998-06-17
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94 lines
/***
*closeall.c - close all open files
*
* Copyright (c) 1985-1997, Microsoft Corporation. All rights reserved.
*
*Purpose:
* defines _fcloseall() - closes all open files except stdin, stdout
* stdprn, stderr, and stdaux.
*
*******************************************************************************/
#include <cruntime.h>
#ifdef _WIN32
#include <windows.h>
#endif /* _WIN32 */
#include <stdio.h>
#include <file2.h>
#include <internal.h>
#include <malloc.h>
#include <mtdll.h>
#include <dbgint.h>
/***
*int _fcloseall() - close all open streams
*
*Purpose:
* Closes all streams currently open except for stdin/out/err/aux/prn.
* tmpfile() files are among those closed.
*
*Entry:
* None.
*
*Exit:
* returns number of streams closed if OK
* returns EOF if fails.
*
*Exceptions:
*
*******************************************************************************/
int __cdecl _fcloseall (
void
)
{
REG2 int count = 0;
#ifdef _WIN32
REG1 i;
_mlock(_IOB_SCAN_LOCK);
for ( i = 3 ; i < _nstream ; i++ ) {
if ( __piob[i] != NULL ) {
/*
* if the stream is in use, close it
*/
if ( inuse( (FILE *)__piob[i] ) && (fclose( __piob[i] ) !=
EOF) )
count++;
/*
* if stream is part of a _FILEX we allocated, free it.
*/
if ( i >= _IOB_ENTRIES ) {
#if defined (_MT)
DeleteCriticalSection( &(((_FILEX *)__piob[i])->lock) );
#endif /* defined (_MT) */
_free_crt( __piob[i] );
__piob[i] = NULL;
}
}
}
_munlock(_IOB_SCAN_LOCK);
#else /* _WIN32 */
#if defined (_M_MPPC) || defined (_M_M68K)
REG1 FILE *stream = &_iob[3];
for (; stream <= _lastiob; stream++)
if (fclose(stream) != EOF)
count++;
#endif /* defined (_M_MPPC) || defined (_M_M68K) */
#endif /* _WIN32 */
return(count);
}