Archipelago » qemu

/*

 * event notifier support

 *

 * Copyright Red Hat, Inc. 2010

 *

 * Authors:

 *  Michael S. Tsirkin <mst@redhat.com>

 *

 * This work is licensed under the terms of the GNU GPL, version 2 or later.

 * See the COPYING file in the top-level directory.

 */

#include "qemu-common.h"

#include "qemu/event_notifier.h"

#include "qemu/main-loop.h"

int event_notifier_init(EventNotifier *e, int active)

{

    e->event = CreateEvent(NULL, TRUE, FALSE, NULL);

    assert(e->event);

    return 0;

}

void event_notifier_cleanup(EventNotifier *e)

{

    CloseHandle(e->event);

}

HANDLE event_notifier_get_handle(EventNotifier *e)

{

    return e->event;

}

int event_notifier_set_handler(EventNotifier *e,

                               EventNotifierHandler *handler)

{

    if (handler) {

        return qemu_add_wait_object(e->event, (IOHandler *)handler, e);

    } else {

        qemu_del_wait_object(e->event, (IOHandler *)handler, e);

        return 0;

    }

}

int event_notifier_set(EventNotifier *e)

{

    SetEvent(e->event);

    return 0;

}

int event_notifier_test_and_clear(EventNotifier *e)

{

    int ret = WaitForSingleObject(e->event, 0);

    if (ret == WAIT_OBJECT_0) {

        ResetEvent(e->event);

        return true;

    }

    return false;

}