66 lines
1.2 KiB
C++
66 lines
1.2 KiB
C++
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/*****************************************************************/
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/** Microsoft Windows for Workgroups **/
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/** Copyright (C) Microsoft Corp., 1991-1992 **/
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/*****************************************************************/
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/* BUFGLOB.CPP -- Implementation of GLOBAL_BUFFER class.
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*
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* History:
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* 03/24/93 gregj Created
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*/
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#include "npcommon.h"
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#include "buffer.h"
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BOOL LOCAL_BUFFER::Alloc( UINT cbBuffer )
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{
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_hMem = ::LocalAlloc( LMEM_MOVEABLE, cbBuffer );
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if (_hMem == NULL) {
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_npBuffer = NULL;
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_cb = 0;
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return FALSE;
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}
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_npBuffer = ::LocalLock( _hMem );
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_cb = cbBuffer;
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return TRUE;
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}
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BOOL LOCAL_BUFFER::Realloc( UINT cbNew )
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{
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if (_hMem == NULL)
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return FALSE;
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::LocalUnlock( _hMem );
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HLOCAL hNew = ::LocalReAlloc( _hMem, cbNew, LMEM_MOVEABLE );
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if (hNew == NULL) {
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::LocalLock( _hMem );
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return FALSE;
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}
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_hMem = hNew;
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_npBuffer = ::LocalLock( _hMem );
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_cb = cbNew;
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return TRUE;
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}
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LOCAL_BUFFER::LOCAL_BUFFER( UINT cbInitial /* =0 */ )
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: BUFFER_BASE(),
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_hMem( NULL ),
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_npBuffer( NULL )
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{
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if (cbInitial)
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Alloc( cbInitial );
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}
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LOCAL_BUFFER::~LOCAL_BUFFER()
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{
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if (_hMem != NULL) {
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::LocalUnlock( _hMem );
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::LocalFree( _hMem );
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_hMem = NULL;
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_npBuffer = NULL;
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}
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}
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