tt_message_arg_mode(library call) tt_message_arg_mode(library call)
NAMEtt_message_arg_mode — return the mode of a message argument
SYNOPSIS
#include <Tt/tt_c.h>
Tt_mode tt_message_arg_mode(
Tt_message m,
int n);
DESCRIPTION
The tt_message_arg_mode function returns the mode of the nth message
argument.
The m argument is the opaque handle for the message involved in this
operation. The n argument is the number of the argument to be
returned. The first argument is numbered zero.
RETURN VALUE
Upon successful completion, the tt_message_arg_mode function returns a
value that specifies who (sender, handler, observers) writes and reads
a message argument. The following modes are defined:
TT_IN The argument is written by the sender and read by the handler
and any observers.
TT_OUT The argument is written by the handler and read by the sender
and any reply observers.
TT_INOUT The argument is written by the sender and the handler and
read by all.
The application can use tt_int_error(3) to extract one of the following
Tt_status values from the Tt_mode integer return value:
TT_OK The operation completed successfully.
TT_ERR_NOMP
The ttsession(1) process is not running and the ToolTalk ser‐
vice cannot restart it.
TT_ERR_NUM
The integer value passed was invalid (out of range).
TT_ERR_POINTER
The pointer passed does not point to an object of the correct
type for this operation.
SEE ALSO
Tt/tt_c.h - Tttt_c(5), tt_int_error(3).
tt_message_arg_mode(library call)
