On Thu, Feb 21, 2013 at 08:54:47PM +0800, Liu Ping Fan wrote:
> From: Liu Ping Fan <pingf...@linux.vnet.ibm.com>
>
> When event poll can work with normal fd, we can port them
> onto the event loop.
>
> Signed-off-by: Liu Ping Fan <pingf...@linux.vnet.ibm.com>
> ---
> hw/dataplane/event-poll.c | 36 ++++++++++++++++++++++++++++++++++++
> hw/dataplane/event-poll.h | 8 ++++++++
> 2 files changed, 44 insertions(+), 0 deletions(-)
>
> diff --git a/hw/dataplane/event-poll.c b/hw/dataplane/event-poll.c
> index 2b55c6e..b7dea53 100644
> --- a/hw/dataplane/event-poll.c
> +++ b/hw/dataplane/event-poll.c
> @@ -32,6 +32,42 @@ void event_poll_add(EventPoll *poll, EventHandler *handler,
> }
> }
>
> +void event_poll_add_fd(EventPoll *poll, int fd, uint32_t type,
> + EventHandler *handler)
> +{
> + struct epoll_event event = {
> + .events = type,
> + .data.ptr = handler,
> + };
> +
> + if (epoll_ctl(poll->epoll_fd, EPOLL_CTL_ADD, fd, &event) != 0) {
> + fprintf(stderr, "failed to add event fd handler to epoll: %m\n");
> + exit(1);
> + }
> +
> +}
An alternative to adding these interfaces would be initializing an
EventNotifier using event_notifier_init_fd() and then passing that in to
event_poll_add()
I think doing it this way would be applicable on top of Paolo's
patches to switch dataplane to using AioContext as well.
> +void event_poll_del_fd(EventPoll *poll, int fd)
> +{
> + if (epoll_ctl(poll->epoll_fd, EPOLL_CTL_DEL, fd, NULL) != 0) {
> + fprintf(stderr, "failed to del event handler to epoll: %m\n");
> + exit(1);
> + }
> +}
> +
> +
> +void event_poll_modify_fd(EventPoll *poll, int fd, uint32_t type,
> + EventHandler *handler)
> +{
> + struct epoll_event event = {
> + .events = type,
> + .data.ptr = handler,
> + };
> + if (epoll_ctl(poll->epoll_fd, EPOLL_CTL_MOD, fd, &event) != 0) {
> + fprintf(stderr, "failed to modify event handler to epoll: %m\n");
> + exit(1);
> + }
> +}
> +
> /* Event callback for stopping event_poll() */
> static void handle_stop(EventHandler *handler)
> {
> diff --git a/hw/dataplane/event-poll.h b/hw/dataplane/event-poll.h
> index 3e8d3ec..606138c 100644
> --- a/hw/dataplane/event-poll.h
> +++ b/hw/dataplane/event-poll.h
> @@ -22,6 +22,8 @@ typedef void EventCallback(EventHandler *handler);
> struct EventHandler {
> EventNotifier *notifier; /* eventfd */
> EventCallback *callback; /* callback function */
> + void *opaque;
> + int fd; /* normal fd*/
> };
>
> typedef struct {
> @@ -32,6 +34,12 @@ typedef struct {
>
> void event_poll_add(EventPoll *poll, EventHandler *handler,
> EventNotifier *notifier, EventCallback *callback);
> +void event_poll_add_fd(EventPoll *poll, int fd, uint32_t type,
> + EventHandler *handler);
> +void event_poll_del_fd(EventPoll *poll, int fd);
> +void event_poll_modify_fd(EventPoll *poll, int fd, uint32_t type,
> + EventHandler *handler);
> +
> void event_poll_init(EventPoll *poll);
> void event_poll_cleanup(EventPoll *poll);
> void event_poll(EventPoll *poll);
> --
> 1.7.4.4
>
>
