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TlsFree function

Releases a thread local storage (TLS) index, making it available for reuse.

Syntax


BOOL WINAPI TlsFree(
  _In_  DWORD dwTlsIndex
);

Parameters

dwTlsIndex [in]

The TLS index that was allocated by the TlsAlloc function.

Return value

If the function succeeds, the return value is nonzero.

If the function fails, the return value is zero. To get extended error information, call GetLastError.

Remarks

If the threads of the process have allocated memory and stored a pointer to the memory in a TLS slot, they should free the memory before calling TlsFree. The TlsFree function does not free memory blocks whose addresses have been stored in the TLS slots associated with the TLS index. It is expected that DLLs call this function (if at all) only during DLL_PROCESS_DETACH.

For more information, see Thread Local Storage.

Examples

For an example, see Using Thread Local Storage or Using Thread Local Storage in a Dynamic-Link Library.

Requirements

Minimum supported client

Windows XP [desktop apps only]

Minimum supported server

Windows Server 2003 [desktop apps only]

Header

WinBase.h on Windows XP, Windows Server 2003, Windows Vista, Windows 7, Windows Server 2008, and Windows Server 2008 R2 (include Windows.h);
Processthreadsapi.h on Windows 8 and Windows Server 2012

Library

Kernel32.lib

DLL

Kernel32.dll

See also

Processes and Threads Overview
Thread Local Storage
TlsAlloc
TlsGetValue
TlsSetValue

 

 

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