tt_ptype_opnum_callback_add(libraryttc_apltly)pe_opnum_callback_add(library call)
NAME [Toc] [Back]
tt_ptype_opnum_callback_add - return a callback if two opnums are
equal
SYNOPSIS [Toc] [Back]
#include <Tt/tt_c.h>
Tt_status tt_ptype_opnum_callback_add(
const char *ptid,
int opnum,
Tt_message_callback f);
DESCRIPTION [Toc] [Back]
The tt_ptype_opnum_callback_add function returns a callback if the
specified opnums are equal. The callback is defined in Tt/tt_c.h -
Tttt_c(5).
When a message is delivered because it matched a pattern derived from
a signature in the named ptype with an opnum equal to the specified
one, the given callback is run in the usual ToolTalk way.
The ptid argument is the identifier of the ptype involved in this
operation. The opnum argument is the opnum of the specified ptype.
The f argument is the message callback to be run.
RETURN VALUE [Toc] [Back]
Upon successful completion, the tt_ptype_opnum_callback_add function
returns the status of the operation as one of the following Tt_status
values:
TT_OK The operation completed successfully.
TT_ERR_PTYPE
The specified process type is not the name of an installed
process type.
TT_ERR_POINTER
The pointer passed does not point to an object of the
correct type for this operation.
TT_ERR_NOMP
The ttsession(1) process is not running and the ToolTalk
service cannot restart it.
APPLICATION USAGE [Toc] [Back]
The tt_ptype_opnum_callback_add function will only be called for
messages delivered by virtue of matching handler signatures. The
callback cannot be called for observer signatures because the observer
ptype is not recorded in the incoming message.
SEE ALSO [Toc] [Back]
- 1 - Formatted: January 24, 2005
tt_ptype_opnum_callback_add(libraryttc_apltly)pe_opnum_callback_add(library call)
Tt/tt_c.h - Tttt_c(5).
- 2 - Formatted: January 24, 2005 [ Back ] |
