hw/dataplane/event-poll.h

   1 /*
   2  * Event loop with file descriptor polling
   3  *
   4  * Copyright 2012 IBM, Corp.
   5  * Copyright 2012 Red Hat, Inc. and/or its affiliates
   6  *
   7  * Authors:
   8  *   Stefan Hajnoczi <stefanha@redhat.com>
   9  *
  10  * This work is licensed under the terms of the GNU GPL, version 2 or later.
  11  * See the COPYING file in the top-level directory.
  12  *
  13  */
  14
  15 #ifndef EVENT_POLL_H
  16 #define EVENT_POLL_H
  17
  18 #include "qemu/event_notifier.h"
  19
  20 typedef struct EventHandler EventHandler;
  21 typedef void EventCallback(EventHandler *handler);
  22 struct EventHandler {
  23     EventNotifier *notifier;        /* eventfd */
  24     EventCallback *callback;        /* callback function */
  25 };
  26
  27 typedef struct {
  28     int epoll_fd;                   /* epoll(2) file descriptor */
  29     EventNotifier stop_notifier;    /* stop poll notifier */
  30     EventHandler stop_handler;      /* stop poll handler */
  31 } EventPoll;
  32
  33 void event_poll_add(EventPoll *poll, EventHandler *handler,
  34                     EventNotifier *notifier, EventCallback *callback);
  35 void event_poll_init(EventPoll *poll);
  36 void event_poll_cleanup(EventPoll *poll);
  37 void event_poll(EventPoll *poll);
  38 void event_poll_notify(EventPoll *poll);
  39
  40 #endif /* EVENT_POLL_H */