tt_otype_hsig_arg_mode(library call) tt_otype_hsig_arg_mode(library call)
NAMEtt_otype_hsig_arg_mode — return the mode of an argument of a request
signature of an otype
SYNOPSIS
#include <Tt/tt_c.h>
Tt_mode tt_otype_hsig_arg_mode(
const char *otype,
int sig,
int arg);
DESCRIPTION
The tt_otype_hsig_arg_mode function returns the mode of the argth argu‐
ment of the sigth request signature of the given otype.
The otype argument is the object type involved in this operation. The
sig argument is the zero-based index into the request signatures of the
specified otype. The arg argument is the zero-based index into the
arguments of the specified signature.
RETURN VALUE
Upon successful completion, the tt_otype_hsig_arg_mode function returns
a value that determines who (sender or handler) writes and reads a mes‐
sage 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_OTYPE
The specified object type is not the name of an installed
object type.
SEE ALSO
Tt/tt_c.h - Tttt_c(5), tt_otype_hsig_arg_type(3),
tt_otype_hsig_count(3), tt_otype_hsig_args_count(3),
tt_otype_hsig_op(3), tt_int_error(3).
tt_otype_hsig_arg_mode(library call)
