79 lines
2.5 KiB
C
79 lines
2.5 KiB
C
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/***
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*_freebuf.c - release a buffer from a stream
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*
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* Copyright (c) 1985-2001, Microsoft Corporation. All rights reserved.
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*
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*Purpose:
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* defines _freebuf() - release a buffer from a stream
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*
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*Revision History:
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* 09-19-83 RN initial version
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* 02-15-90 GJF Fixed copyright, alignment.
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* 03-16-90 GJF Replaced cdecl _LOAD_DS with _CALLTYPE1, added #include
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* <cruntime.h> and removed #include <register.h>.
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* 07-23-90 SBM Replaced <assertm.h> by <assert.h>
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* 10-03-90 GJF New-style function declarator.
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* 02-14-92 GJF Replaced _nfile with _nhandle for Win32.
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* 04-06-93 SKS Replace _CRTAPI* with __cdecl
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* 06-22-93 GJF Clear _IOSETVBUF flag (new).
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* 09-05-94 SKS Change "#ifdef" inside comments to "*ifdef" to avoid
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* problems with CRTL source release process.
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* 09-06-94 CFW Replace MTHREAD with _MT.
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* 01-04-95 GJF _WIN32_ -> _WIN32.
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* 01-10-95 CFW Debug CRT allocs.
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* 02-06-94 CFW assert -> _ASSERTE.
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* 02-16-95 GJF Merged in Mac version.
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* 09-06-95 GJF Removed inappropriate ASSERTE()-s.
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* 05-17-99 PML Remove all Macintosh support.
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*
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*******************************************************************************/
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#include <cruntime.h>
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#include <stdio.h>
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#include <file2.h>
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#include <dbgint.h>
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#include <internal.h>
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#include <stdlib.h>
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/***
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*void _freebuf(stream) - release a buffer from a stream
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*
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*Purpose:
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* free a buffer if at all possible. free() the space if malloc'd by me.
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* forget about trying to free a user's buffer for him; it may be static
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* memory (not from malloc), so he has to take care of it. this function
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* is not intended for use outside the library.
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*
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*ifdef _MT
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* Multi-thread notes:
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* _freebuf() does NOT get the stream lock; it is assumed that the
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* caller has already done this.
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*endif
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*
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*Entry:
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* FILE *stream - stream to free bufer on
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*
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*Exit:
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* Buffer may be freed.
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* No return value.
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*
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*Exceptions:
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*
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*******************************************************************************/
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void __cdecl _freebuf (
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REG1 FILE *stream
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)
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{
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_ASSERTE(stream != NULL);
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if (inuse(stream) && mbuf(stream))
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{
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_free_crt(stream->_base);
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stream->_flag &= ~(_IOMYBUF | _IOSETVBUF);
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stream->_base = stream->_ptr = NULL;
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stream->_cnt = 0;
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}
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}
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