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CSimpleStringT::FreeExtra

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釋放先前配置的字串，但不再需要的任何額外的記憶體。

void FreeExtra( );

備註

這會減少字串物件所佔用的記憶體額外負荷。方法會將緩衝區 GetLength傳回的確切長度。

範例

CAtlString basestr;
IAtlStringMgr* pMgr;

pMgr= basestr.GetManager();
ASSERT(pMgr != NULL);

// Create a CSimpleString with 28 characters
CSimpleString str(_T("Many sports are fun to play."), 28, pMgr);
_tprintf_s(_T("Alloc length is %d, String length is %d\n"),
   str.GetAllocLength(), str.GetLength());

// Assigning a smaller string won't cause CSimpleString to free its
// memory, because it assumes the string will grow again anyway.
str = _T("Soccer is best!");
_tprintf_s(_T("Alloc length is %d, String length is %d\n"),
   str.GetAllocLength(), str.GetLength());

// This call forces CSimpleString to release the extra
// memory it doesn't need.
str.FreeExtra();
_tprintf_s(_T("Alloc length is %d, String length is %d\n"),
   str.GetAllocLength(), str.GetLength());

備註

此範例的輸出如下:

Alloc length is 1031, String length is 1024

Alloc length is 1031, String length is 15

Alloc length is 15, String length is 15

需求

Header: atlsimpstr.h

請參閱

參考

CSimpleStringT 類別