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ToolTalk User's Guide

Scoping to a File and/or a Session

A TT_BOTH-scoped pattern will match messages that are scoped to the file, the session, or the file and the session. However, when you use this scope, you must explicitly make a tt_file_join call; otherwise, the ToolTalk service will only match messages that are scoped to both the file and session of the registered pattern. Example 3-8 and Example 3-9 show examples of how to use this scope.

Example 3-8 A Dynamic Pattern that Uses the TT_BOTH Scope

Obtain procid 

tt_open(); 

Create pattern 

Tt_pattern pat = tt_create_pattern(); 

Add scope to pattern 

tt_pattern_scope_add(pat, TT_BOTH); 

Add session to pattern 

tt_pattern_session_add(pat,tt_default_session()); 

Add file to pattern 

tt_pattern_file_add (pat, file); 

Register pattern 

tt_pattern_register(pat); 

Example 3-9 A Static Pattern that Uses the TT_BOTH Scope

Obtain procid 

tt_open(); 

Declare Ptype 

Tt_ptype_declare(ptype); 

Join file 

tt_file_join(file); 

Join session 

tt_session_join(tt_default_session());