guidev_clear.c

来自「MCB2300_ucgui_LCD320240.rar LPC2368的u」· C语言 代码 · 共 73 行

/*********************************************************************
*   			 SEGGER MICROCONTROLLER SYSTEME GmbH				 *
*   	 Solutions for real time microcontroller applications   	 *
**********************************************************************
*   																 *
*   	 (c) 1996 - 2004  SEGGER Microcontroller Systeme GmbH   	 *
*   																 *
*   	 Internet: www.segger.com    Support:  [e-mail]    *
*   																 *
**********************************************************************

***** emWin - Graphical user interface for embedded applications *****
emWin is protected by international copyright laws.   Knowledge of the
source code may not be used to write a similar product.  This file may
only be used in accordance with a license and should not be re-
distributed in any way. We appreciate your understanding and fairness.
----------------------------------------------------------------------
File		: GUIDEV_Clear.c
Purpose 	: Implementation of memory devices, add. module
---------------------------END-OF-HEADER------------------------------
*/

#include "GUI_Protected.h"
#include "GUIDebug.h"
#include <string.h>

/* Memory device capabilities are compiled only if support for them is enabled. */ 
#if GUI_SUPPORT_MEMDEV

/*********************************************************************
*
*   	public code
*
**********************************************************************
*/
/*********************************************************************
*
*   	GUI_MEMDEV_Clear
*/
void GUI_MEMDEV_Clear(GUI_MEMDEV_Handle hMem)
{
	if (!hMem)
	{
		if ((hMem = GUI_Context.hDevData) == 0)
		{
			return;
		}
	}
	{
		GUI_MEMDEV* pDev;
		GUI_USAGE_h hUsage;
		GUI_LOCK();
		pDev = GUI_MEMDEV_H2P(hMem);  /* Convert to pointer */
		hUsage = pDev->hUsage; 
		if (hUsage)
		{
			GUI_USAGE* pUsage = GUI_USAGE_H2P(hUsage);
			GUI_USAGE_Clear(pUsage);
		}
		GUI_UNLOCK();
	}
}

#else

void GUIDEV_Clear(void)
{
} /* avoid empty object files */

#endif /* GUI_MEMDEV_SUPPORT */

/*************************** end of file ****************************/