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LPNSPCLEANUP callback function (ws2spi.h)

  • Article

The NSPCleanup function terminates the use of a particular Windows Sockets namespace service provider.

Syntax

LPNSPCLEANUP Lpnspcleanup;

INT Lpnspcleanup(
  [in] LPGUID lpProviderId
)
{...}

Parameters

[in] lpProviderId

A pointer to the GUID of the namespace provider to be terminated.

Return value

If no error occurs, then NSPCleanup returns a value of NO_ERROR (zero). Otherwise, SOCKET_ERROR (–1) is returned, and the provider must set the appropriate error code using WSASetLastError.

Error code Meaning
WSA_NOT_ENOUGH_MEMORY There is not enough memory available to perform this operation.
WSAEINVAL The lpProviderId parameter doesn't specify a valid provider.
WSAEOPNOTSUPP The operation is not supported. This error is returned if the namespace provider does not implement this function.

Remarks

The NSPCleanup function is called when an application is finished using a Windows Sockets namespace service provider. The NSPCleanup function deregisters a particular namespace provider and allows the transport service provider to free any of the namespace provider's allocated resources.

The NSPStartup function must be called successfully before using any namespace providers. It is permissible to make more than one NSPStartup call. However, for each NSPStartup call, a corresponding NSPCleanup call must also be issued. Only the final NSPCleanup for the service provider does the actual cleanup; the preceding calls decrement an internal reference count in the service provider.

This function should not return until the namespace service provider DLL can be unloaded from memory.

Requirements

Requirement Value
Minimum supported client Windows 2000 Professional [desktop apps only]
Minimum supported server Windows 2000 Server [desktop apps only]
Target Platform Windows
Header ws2spi.h

See also