MWFORWARD

Section: MidWay Programmer's Manual (3C)
Updated: DATE
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NAME

mwforward - MidWay service calls

SYNOPSIS

#include <MidWay.h>

int mwforward(char * svcname, char * data, int len, int flags);

DESCRIPTION

This is used by service routines only. It enables the service routine to forward the request to another service. Note that the request never return back to the service routine but is returned directly back to the client from the next service handler. That means of course that mwreply() and mwforward() are mutually exclusive.

This is often used to make a pipeline, where different services handle separate parts of the request.

The only flags legal is MWNOBLOCK.

RETURN VALUES

0 on success else -error.

ERRORS

ENOENT: There are no service with servicename available.
ENOTCONN: The calling process has not performed a successful mwattach() and is thus not attach to a running system.
EINVAL: flags has a undefined flag set.
EINTR: The subroutine was interrupted by a signal. (Actually one of the underlying msgrcv() or select() system calls were.)
ENOBUFS: We are out of MidWays shared memory buffers, see mwd(1).
EAGAIN: The call would block and MWNOBLOCK flags was set.

WARNINGS

EXAMPLES

BUGS

STANDARDS

NONE

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Time: 11:18:50 GMT, October 24, 2000