]]> ]]> tt_feature_required library call tt_feature_required declare a feature to be required by the calling program. #include <Tt/tt_c.h> Tt_status tt_feature_required Tt_feature feature The tt_feature_required function declares a feature to be required by the calling code. If the feature is available, tt_feature_required enables it. If the feature requires the ToolTalk service to perform some initialization (for example, TT_FEATURE_MULTITHREADED), the initialization is performed in this call. Some features (such as TT_FEATURE_MULTITHREADED) require this call to be made before calling tt_open. feature Specifies the feature to be required. Upon completion, the tt_feature_required function returns the status of the operation as one of the following Tt_status values: TT_OK The feature is available and has been enabled. TT_ERR_TOOLATE The tt_feature_required call must be made prior to other calls that have already been made to the ToolTalk API. TT_ERR_UNIMP The version of the ToolTalk library linked with the calling code does not support the indicated feature. To use the ToolTalk library in a multithreaded environment, an application would declare multithreading to be required before a call to tt_open or ttdt_open: Tt_status ttstat; ttstat = tt_feature_required(TT_FEATURE_MULTITHREADED); tt_open(); &cdeman.Tt.tt.c.h;, &cdeman.tt.feature.enabled;, &cdeman.tt.open;, &cdeman.ttdt.open;