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| author | malc <av1474@comtv.ru> | 2011-11-02 02:16:34 +0400 |
|---|---|---|
| committer | malc <av1474@comtv.ru> | 2011-11-02 02:16:34 +0400 |
| commit | ef26ee0e6c67d415f8b22850f9f13a972ada8be1 (patch) | |
| tree | c18a9cc2a9f213c8a37473f9b7aa001a99898547 /hw/event_notifier.c | |
| parent | dd7b25b5b47df8aaf5580faaf3f60b2a1b779c37 (diff) | |
| parent | e1c2008af64487e7d3cec615612b7f467ebe9bc8 (diff) | |
| download | focaccia-qemu-ef26ee0e6c67d415f8b22850f9f13a972ada8be1.tar.gz focaccia-qemu-ef26ee0e6c67d415f8b22850f9f13a972ada8be1.zip | |
Merge branch 'master' of git://git.qemu.org/qemu
Diffstat (limited to 'hw/event_notifier.c')
| -rw-r--r-- | hw/event_notifier.c | 62 |
1 files changed, 0 insertions, 62 deletions
diff --git a/hw/event_notifier.c b/hw/event_notifier.c deleted file mode 100644 index 13f3656460..0000000000 --- a/hw/event_notifier.c +++ /dev/null @@ -1,62 +0,0 @@ -/* - * 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. See - * the COPYING file in the top-level directory. - */ - -#include "hw.h" -#include "event_notifier.h" -#ifdef CONFIG_EVENTFD -#include <sys/eventfd.h> -#endif - -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_test_and_clear(EventNotifier *e) -{ - uint64_t value; - int r = read(e->fd, &value, sizeof(value)); - return r == sizeof(value); -} - -int event_notifier_test(EventNotifier *e) -{ - uint64_t value; - int r = read(e->fd, &value, sizeof(value)); - if (r == sizeof(value)) { - /* restore previous value. */ - int s = write(e->fd, &value, sizeof(value)); - /* never blocks because we use EFD_SEMAPHORE. - * If we didn't we'd get EAGAIN on overflow - * and we'd have to write code to ignore it. */ - assert(s == sizeof(value)); - } - return r == sizeof(value); -} |