95 lines
2.7 KiB
C
95 lines
2.7 KiB
C
#pragma once
|
|
/*
|
|
* Copyright (c) 2016 MariaDB Corporation Ab
|
|
*
|
|
* Use of this software is governed by the Business Source License included
|
|
* in the LICENSE.TXT file and at www.mariadb.com/bsl11.
|
|
*
|
|
* Change Date: 2019-07-01
|
|
*
|
|
* On the date above, in accordance with the Business Source License, use
|
|
* of this software will be governed by version 2 or later of the General
|
|
* Public License.
|
|
*/
|
|
|
|
/**
|
|
* @file include/maxscale/poll.h - The public poll interface
|
|
*/
|
|
|
|
#include <maxscale/cdefs.h>
|
|
|
|
#include <maxscale/buffer.h>
|
|
#include <maxscale/dcb.h>
|
|
|
|
MXS_BEGIN_DECLS
|
|
|
|
/*
|
|
* Insert a fake hangup event for a DCB into the polling queue.
|
|
*
|
|
* This is used when a monitor detects that a server is not responding.
|
|
*
|
|
* @param dcb DCB to emulate an EPOLLOUT event for
|
|
*/
|
|
void poll_fake_hangup_event(DCB *dcb);
|
|
|
|
/*
|
|
* Insert a fake write completion event for a DCB into the polling
|
|
* queue.
|
|
*
|
|
* This is used to trigger transmission activity on another DCB from
|
|
* within the event processing routine of a DCB. or to allow a DCB
|
|
* to defer some further output processing, to allow for other DCBs
|
|
* to receive a slice of the processing time. Fake events are added
|
|
* to the tail of the event queue, in the same way that real events
|
|
* are, so maintain the "fairness" of processing.
|
|
*
|
|
* @param dcb DCB to emulate an EPOLLOUT event for
|
|
*/
|
|
void poll_fake_write_event(DCB *dcb);
|
|
|
|
/*
|
|
* Insert a fake read completion event for a DCB into the polling
|
|
* queue.
|
|
*
|
|
* This is used to trigger transmission activity on another DCB from
|
|
* within the event processing routine of a DCB. or to allow a DCB
|
|
* to defer some further input processing, to allow for other DCBs
|
|
* to receive a slice of the processing time. Fake events are added
|
|
* to the tail of the event queue, in the same way that real events
|
|
* are, so maintain the "fairness" of processing.
|
|
*
|
|
* @param dcb DCB to emulate an EPOLLIN event for
|
|
*/
|
|
void poll_fake_read_event(DCB *dcb);
|
|
|
|
/**
|
|
* Add a DCB to the set of descriptors within the polling
|
|
* environment.
|
|
*
|
|
* @param dcb The descriptor to add to the poll
|
|
* @return -1 on error or 0 on success
|
|
*/
|
|
int poll_add_dcb(DCB *);
|
|
|
|
/**
|
|
* Remove a descriptor from the set of descriptors within the
|
|
* polling environment.
|
|
*
|
|
* @param dcb The descriptor to remove
|
|
* @return -1 on error or 0 on success; actually always 0
|
|
*/
|
|
int poll_remove_dcb(DCB *);
|
|
|
|
/**
|
|
* Add given GWBUF to DCB's readqueue and add a pending EPOLLIN event for DCB.
|
|
* The event pretends that there is something to read for the DCB. Actually
|
|
* the incoming data is stored in the DCB's readqueue where it is read.
|
|
*
|
|
* @param dcb DCB where the event and data are added
|
|
* @param buf GWBUF including the data
|
|
*
|
|
*/
|
|
void poll_add_epollin_event_to_dcb(DCB* dcb, GWBUF* buf);
|
|
|
|
MXS_END_DECLS
|