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author | Paolo Bonzini <pbonzini@redhat.com> | 2012-12-20 15:58:44 +0100 |
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committer | Paolo Bonzini <pbonzini@redhat.com> | 2013-01-12 18:42:50 +0100 |
commit | baacf04799ace72a9c735dd9306a1ceaf305e7cf (patch) | |
tree | 5e6750afe4b31c4343f9dd4bc07827cbdcb51466 /event_notifier-posix.c | |
parent | f157ebba2de4a6225679e13cc1ce01ff5d147c76 (diff) | |
download | qemu-baacf04799ace72a9c735dd9306a1ceaf305e7cf.zip qemu-baacf04799ace72a9c735dd9306a1ceaf305e7cf.tar.gz qemu-baacf04799ace72a9c735dd9306a1ceaf305e7cf.tar.bz2 |
build: move libqemuutil.a components to util/
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'event_notifier-posix.c')
-rw-r--r-- | event_notifier-posix.c | 121 |
1 files changed, 0 insertions, 121 deletions
diff --git a/event_notifier-posix.c b/event_notifier-posix.c deleted file mode 100644 index 713d756..0000000 --- a/event_notifier-posix.c +++ /dev/null @@ -1,121 +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 or later. - * See the COPYING file in the top-level directory. - */ - -#include "qemu-common.h" -#include "qemu/event_notifier.h" -#include "char/char.h" -#include "qemu/main-loop.h" - -#ifdef CONFIG_EVENTFD -#include <sys/eventfd.h> -#endif - -void event_notifier_init_fd(EventNotifier *e, int fd) -{ - e->rfd = fd; - e->wfd = fd; -} - -int event_notifier_init(EventNotifier *e, int active) -{ - int fds[2]; - int ret; - -#ifdef CONFIG_EVENTFD - ret = eventfd(0, EFD_NONBLOCK | EFD_CLOEXEC); -#else - ret = -1; - errno = ENOSYS; -#endif - if (ret >= 0) { - e->rfd = e->wfd = ret; - } else { - if (errno != ENOSYS) { - return -errno; - } - if (qemu_pipe(fds) < 0) { - return -errno; - } - ret = fcntl_setfl(fds[0], O_NONBLOCK); - if (ret < 0) { - ret = -errno; - goto fail; - } - ret = fcntl_setfl(fds[1], O_NONBLOCK); - if (ret < 0) { - ret = -errno; - goto fail; - } - e->rfd = fds[0]; - e->wfd = fds[1]; - } - if (active) { - event_notifier_set(e); - } - return 0; - -fail: - close(fds[0]); - close(fds[1]); - return ret; -} - -void event_notifier_cleanup(EventNotifier *e) -{ - if (e->rfd != e->wfd) { - close(e->rfd); - } - close(e->wfd); -} - -int event_notifier_get_fd(EventNotifier *e) -{ - return e->rfd; -} - -int event_notifier_set_handler(EventNotifier *e, - EventNotifierHandler *handler) -{ - return qemu_set_fd_handler(e->rfd, (IOHandler *)handler, NULL, e); -} - -int event_notifier_set(EventNotifier *e) -{ - static const uint64_t value = 1; - ssize_t ret; - - do { - ret = write(e->wfd, &value, sizeof(value)); - } while (ret < 0 && errno == EINTR); - - /* EAGAIN is fine, a read must be pending. */ - if (ret < 0 && errno != EAGAIN) { - return -errno; - } - return 0; -} - -int event_notifier_test_and_clear(EventNotifier *e) -{ - int value; - ssize_t len; - char buffer[512]; - - /* Drain the notify pipe. For eventfd, only 8 bytes will be read. */ - value = 0; - do { - len = read(e->rfd, buffer, sizeof(buffer)); - value |= (len > 0); - } while ((len == -1 && errno == EINTR) || len == sizeof(buffer)); - - return value; -} |