mirror of
https://github.com/qemu/qemu.git
synced 2024-11-25 11:53:39 +08:00
6bf819f0a2
Win32 event notifiers are not file descriptors, so they will not be able to use qemu_set_fd_handler. But even if for now we only have a POSIX version of EventNotifier, we can add a specific function that wraps the call. The wrapper passes the EventNotifier as the opaque value so that it will be used with container_of. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
68 lines
1.3 KiB
C
68 lines
1.3 KiB
C
/*
|
|
* 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 "event_notifier.h"
|
|
#include "qemu-char.h"
|
|
|
|
#ifdef CONFIG_EVENTFD
|
|
#include <sys/eventfd.h>
|
|
#endif
|
|
|
|
void event_notifier_init_fd(EventNotifier *e, int fd)
|
|
{
|
|
e->fd = fd;
|
|
}
|
|
|
|
int event_notifier_init(EventNotifier *e, int active)
|
|
{
|
|
#ifdef CONFIG_EVENTFD
|
|
int fd = eventfd(!!active, EFD_NONBLOCK | EFD_CLOEXEC);
|
|
if (fd < 0)
|
|
return -errno;
|
|
e->fd = fd;
|
|
return 0;
|
|
#else
|
|
return -ENOSYS;
|
|
#endif
|
|
}
|
|
|
|
void event_notifier_cleanup(EventNotifier *e)
|
|
{
|
|
close(e->fd);
|
|
}
|
|
|
|
int event_notifier_get_fd(EventNotifier *e)
|
|
{
|
|
return e->fd;
|
|
}
|
|
|
|
int event_notifier_set_handler(EventNotifier *e,
|
|
EventNotifierHandler *handler)
|
|
{
|
|
return qemu_set_fd_handler(e->fd, (IOHandler *)handler, NULL, e);
|
|
}
|
|
|
|
int event_notifier_set(EventNotifier *e)
|
|
{
|
|
uint64_t value = 1;
|
|
int r = write(e->fd, &value, sizeof(value));
|
|
return r == sizeof(value);
|
|
}
|
|
|
|
int event_notifier_test_and_clear(EventNotifier *e)
|
|
{
|
|
uint64_t value;
|
|
int r = read(e->fd, &value, sizeof(value));
|
|
return r == sizeof(value);
|
|
}
|