libvirt/src/event.c

/*
 * event.c: 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>
 */

#include <config.h>

#include "event.h"

#include <stdlib.h>

static virEventAddHandleFunc addHandleImpl = NULL;
static virEventUpdateHandleFunc updateHandleImpl = NULL;
static virEventRemoveHandleFunc removeHandleImpl = NULL;
static virEventAddTimeoutFunc addTimeoutImpl = NULL;
static virEventUpdateTimeoutFunc updateTimeoutImpl = NULL;
static virEventRemoveTimeoutFunc removeTimeoutImpl = NULL;

int virEventAddHandle(int fd,
                      int events,
                      virEventHandleCallback cb,
                      void *opaque,
                      virFreeCallback ff) {
    if (!addHandleImpl)
        return -1;

    return addHandleImpl(fd, events, cb, opaque, ff);
}

void virEventUpdateHandle(int watch, int events) {
    updateHandleImpl(watch, events);
}

int virEventRemoveHandle(int watch) {
    if (!removeHandleImpl)
        return -1;

    return removeHandleImpl(watch);
}

int virEventAddTimeout(int timeout,
                       virEventTimeoutCallback cb,
                       void *opaque,
                       virFreeCallback ff) {
    if (!addTimeoutImpl)
        return -1;

    return addTimeoutImpl(timeout, cb, opaque, ff);
}

void virEventUpdateTimeout(int timer, int timeout) {
    updateTimeoutImpl(timer, timeout);
}

int virEventRemoveTimeout(int timer) {
    if (!removeTimeoutImpl)
        return -1;

    return removeTimeoutImpl(timer);
}

/**
 * virEventRegisterImpl:
 * Register an EventImpl
 * @addHandle: the callback to add fd handles
 * @updateHandle: the callback to update fd handles
 * @removeHandle: the callback to remove fd handles
 * @addTimeout: the callback to add a timeout
 * @updateTimeout: the callback to update a timeout
 * @removeTimeout: the callback to remove a timeout
 */
void virEventRegisterImpl(virEventAddHandleFunc addHandle,
                          virEventUpdateHandleFunc updateHandle,
                          virEventRemoveHandleFunc removeHandle,
                          virEventAddTimeoutFunc addTimeout,
                          virEventUpdateTimeoutFunc updateTimeout,
                          virEventRemoveTimeoutFunc removeTimeout) {
    addHandleImpl = addHandle;
    updateHandleImpl = updateHandle;
    removeHandleImpl = removeHandle;
    addTimeoutImpl = addTimeout;
    updateTimeoutImpl = updateTimeout;
    removeTimeoutImpl = removeTimeout;
}