tt_feature_required(library call) tt_feature_required(library call)
NAMEtt_feature_required — declare a feature to be required by the calling
program.
SYNOPSIS
#include <Tt/tt_c.h>
Tt_status tt_feature_required(
Tt_feature feature);
DESCRIPTION
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 initial‐
ization (for example, TT_FEATURE_MULTITHREADED), the initialization is
performed in this call. Some features (such as TT_FEATURE_MULTI‐
THREADED) require this call to be made before calling tt_open.
ARGUMENTS
feature Specifies the feature to be required.
RETURN VALUE
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.
APPLICATION USAGE
To use the ToolTalk library in a multithreaded environment, an applica‐
tion 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();
SEE ALSO
Tt/tt_c.h - Tttt_c(5), tt_feature_enabled(3), tt_open(3), ttdt_open(3)
tt_feature_required(library call)
