ConvertThreadToFiber function (winbase.h)

Converts the current thread into a fiber. You must convert a thread into a fiber before you can schedule other fibers.


LPVOID ConvertThreadToFiber(
  [in, optional] LPVOID lpParameter


[in, optional] lpParameter

A pointer to a variable that is passed to the fiber. The fiber can retrieve this data by using the GetFiberData macro.

Return value

If the function succeeds, the return value is the address of the fiber.

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


Only fibers can execute other fibers. If a thread needs to execute a fiber, it must call ConvertThreadToFiber or ConvertThreadToFiberEx to create an area in which to save fiber state information. The thread is now the current fiber. The state information for this fiber includes the fiber data specified by lpParameter.

To compile an application that uses this function, define _WIN32_WINNT as 0x0400 or later. For more information, see Using the Windows Headers.


For an example, see Using Fibers.


Requirement Value
Minimum supported client Windows XP [desktop apps only]
Minimum supported server Windows Server 2003 [desktop apps only]
Target Platform Windows
Header winbase.h (include Windows.h)
Library Kernel32.lib
DLL Kernel32.dll

See also





Process and Thread Functions