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CSimpleStringT::FreeExtra

Frees any extra memory previously allocated by the string but no longer needed.

void FreeExtra( );

This should reduce the memory overhead consumed by the string object. The method reallocates the buffer to the exact length returned by GetLength.

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());

The output from this example is as follows:

Alloc length is 1031, String length is 1024

Alloc length is 1031, String length is 15

Alloc length is 15, String length is 15

Header: atlsimpstr.h

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