UDI_HANDLE_IS_NULL(3udi)

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Determine whether a handle value is null

SYNOPSIS

#include <udi.h>

#define UDI_HANDLE_IS_NULL(handle, handle_type)
 

ARGUMENTS handle is the handle value to check.

handle_type is the type specification for that handle.

DESCRIPTION This macro is used to check if an opaque handle value is null (i.e. all zeroes). This is the only way in which a handle value can be compared against any other value.

RETURN VALUES This macro returns a udi_boolean_t value that is TRUE if the handle value is a null handle value.