57 lines
1.4 KiB
C
57 lines
1.4 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) 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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*******************************************************************************/
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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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* 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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*
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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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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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