66 lines
2.3 KiB
C
66 lines
2.3 KiB
C
/*
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*********************************************************************************************************
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* uC/GUI
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* Universal graphic software for embedded applications
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*
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* (c) Copyright 2002, Micrium Inc., Weston, FL
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* (c) Copyright 2002, SEGGER Microcontroller Systeme GmbH
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*
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* µC/GUI is protected by international copyright laws. Knowledge of the
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* source code may not be used to write a similar product. This file may
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* only be used in accordance with a license and should not be redistributed
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* in any way. We appreciate your understanding and fairness.
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*
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----------------------------------------------------------------------
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File : GUIRealloc.C
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Purpose : Dynamic memory management
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----------------------------------------------------------------------
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*/
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#include <stddef.h> /* needed for definition of NULL */
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#include <string.h> /* for memcpy, memset */
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#include "GUI_Protected.h"
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#include "GUIDebug.h"
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/*********************************************************************
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*
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* Public routines: Using internal memory management
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*
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**********************************************************************
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*/
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/*********************************************************************
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*
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* GUI_ALLOC_Realloc
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*
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* Purpose:
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* Reallocate a memory block. This is typically used to grow memory
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* blocks. The contents of the old memory block are copied into the
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* new block (or as much as fits in case of shrinkage).
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* In case of error the old memory block (and its handle) remain
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* unchanged.
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*
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* Return value:
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* On success: Handle of newly allocated memory block
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* On error: 0
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*/
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GUI_HMEM GUI_ALLOC_Realloc(GUI_HMEM hOld, int NewSize) {
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GUI_HMEM hNew;
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hNew = GUI_ALLOC_AllocNoInit(NewSize);
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if (hNew && hOld) {
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void *pNew, *pOld;
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int Size, OldSize;
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OldSize = GUI_ALLOC_GetSize(hOld);
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Size = (OldSize < NewSize) ? OldSize : NewSize;
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GUI_LOCK();
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pNew = GUI_ALLOC_h2p(hNew);
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pOld = GUI_ALLOC_h2p(hOld);
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memcpy(pNew, pOld, Size);
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GUI_UNLOCK();
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GUI_ALLOC_Free(hOld);
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}
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return hNew;
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}
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/*************************** End of file ****************************/
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