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NAME
     tt_thread_session - retrieve the default session  identifier
     for the currently active thread

SYNOPSIS
     #include <Tt/tt_c.h>
     char *tt_thread_session ( void );

DESCRIPTION
     The tt_thread_session() function retrieves the default  ses-
     sion identifier for the currently active thread.

     If there is no default session set for the  currently-active
     thread,  then  the  process  default  session  identifier is
     returned.

RETURN VALUE
     Upon successful completion, the tt_thread_session() function
     returns  the pointer to the unique identifier for the active
     thread's current default session. If the pointer is NULL, no
     default   session   is   set.   The   application   can  use
     tt_ptr_error(3) to extract one of  the  following  Tt_status
     values from the returned pointer:

     TT_OK The operation completed successfully.

     TT_ERR_NOMP
             The ttsession(1) process  is  not  running  and  the
             ToolTalk service cannot restart it.

     TT_ERR_PROCID
             The current default process  identifier  is  out  of
             date or invalid.

APPLICATION USAGE
     A session can have more than one  session  identifier.  This
     means  that  the   application  cannot compare the result of
     tt_thread_session() with the result of tt_message_session(3)
     to verify that the message was sent in the default session.

     The application should  use  tt_free(3)  to  free  any  data
     stored in the address returned by the ToolTalk API.

SEE ALSO
     tt_c(5), tt_prt_error(3), tt_free(3)

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