mirror of
https://gitlab.com/libvirt/libvirt.git
synced 2024-12-25 01:34:11 +03:00
108 lines
3.3 KiB
C
108 lines
3.3 KiB
C
/*
|
|
* event.h: event loop for monitoring file handles
|
|
*
|
|
* Copyright (C) 2007 Daniel P. Berrange
|
|
* Copyright (C) 2007 Red Hat, Inc.
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* This library is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with this library; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*
|
|
* Author: Daniel P. Berrange <berrange@redhat.com>
|
|
*/
|
|
|
|
#ifndef __VIRTD_EVENT_H__
|
|
#define __VIRTD_EVENT_H__
|
|
|
|
#include "../src/event.h"
|
|
|
|
/**
|
|
* virEventAddHandleImpl: register a callback for monitoring file handle events
|
|
*
|
|
* @fd: file handle to monitor for events
|
|
* @events: bitset of events to watch from POLLnnn constants
|
|
* @cb: callback to invoke when an event occurs
|
|
* @opaque: user data to pass to callback
|
|
*
|
|
* returns -1 if the file handle cannot be registered, 0 upon success
|
|
*/
|
|
int virEventAddHandleImpl(int fd, int events, virEventHandleCallback cb, void *opaque);
|
|
|
|
/**
|
|
* virEventUpdateHandleImpl: change event set for a monitored file handle
|
|
*
|
|
* @fd: file handle to monitor for events
|
|
* @events: bitset of events to watch from POLLnnn constants
|
|
*
|
|
* Will not fail if fd exists
|
|
*/
|
|
void virEventUpdateHandleImpl(int fd, int events);
|
|
|
|
/**
|
|
* virEventRemoveHandleImpl: unregister a callback from a file handle
|
|
*
|
|
* @fd: file handle to stop monitoring for events
|
|
*
|
|
* returns -1 if the file handle was not registered, 0 upon success
|
|
*/
|
|
int virEventRemoveHandleImpl(int fd);
|
|
|
|
/**
|
|
* virEventAddTimeoutImpl: register a callback for a timer event
|
|
*
|
|
* @frequency: time between events in milliseconds
|
|
* @cb: callback to invoke when an event occurs
|
|
* @opaque: user data to pass to callback
|
|
*
|
|
* Setting frequency to -1 will disable the timer. Setting the frequency
|
|
* to zero will cause it to fire on every event loop iteration.
|
|
*
|
|
* returns -1 if the file handle cannot be registered, a positive
|
|
* integer timer id upon success
|
|
*/
|
|
int virEventAddTimeoutImpl(int frequency, virEventTimeoutCallback cb, void *opaque);
|
|
|
|
/**
|
|
* virEventUpdateTimeoutImpl: change frequency for a timer
|
|
*
|
|
* @timer: timer id to change
|
|
* @frequency: time between events in milliseconds
|
|
*
|
|
* Setting frequency to -1 will disable the timer. Setting the frequency
|
|
* to zero will cause it to fire on every event loop iteration.
|
|
*
|
|
* Will not fail if timer exists
|
|
*/
|
|
void virEventUpdateTimeoutImpl(int timer, int frequency);
|
|
|
|
/**
|
|
* virEventRemoveTimeoutImpl: unregister a callback for a timer
|
|
*
|
|
* @timer: the timer id to remove
|
|
*
|
|
* returns -1 if the timer was not registered, 0 upon success
|
|
*/
|
|
int virEventRemoveTimeoutImpl(int timer);
|
|
|
|
/**
|
|
* virEventRunOnce: run a single iteration of the event loop.
|
|
*
|
|
* Blocks the caller until at least one file handle has an
|
|
* event or the first timer expires.
|
|
*
|
|
* returns -1 if the event monitoring failed
|
|
*/
|
|
int virEventRunOnce(void);
|
|
|
|
#endif /* __VIRTD_EVENT_H__ */
|