watch.h

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#ifndef foowatchhfoo
#define foowatchhfoo

/***
  This file is part of avahi.

  avahi is free software; you can redistribute it and/or modify it
  under the terms of the GNU Lesser General Public License as
  published by the Free Software Foundation; either version 2.1 of the
  License, or (at your option) any later version.

  avahi is distributed in the hope that it will be useful, but WITHOUT
  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
  Public License for more details.

  You should have received a copy of the GNU Lesser General Public
  License along with avahi; if not, write to the Free Software
  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  USA.
***/

#include <poll.h>
#include <sys/time.h>

#include <avahi-common/cdecl.h>

AVAHI_C_DECL_BEGIN

typedef struct AvahiWatch AvahiWatch;

typedef struct AvahiTimeout AvahiTimeout;

typedef struct AvahiPoll AvahiPoll;

typedef enum {
    AVAHI_WATCH_IN = POLLIN,      
    AVAHI_WATCH_OUT = POLLOUT,    
    AVAHI_WATCH_ERR = POLLERR,    
    AVAHI_WATCH_HUP = POLLHUP     
} AvahiWatchEvent;

typedef void (*AvahiWatchCallback)(AvahiWatch *w, int fd, AvahiWatchEvent event, void *userdata);

typedef void (*AvahiTimeoutCallback)(AvahiTimeout *t, void *userdata);

struct AvahiPoll {

    void* userdata;

    AvahiWatch* (*watch_new)(const AvahiPoll *api, int fd, AvahiWatchEvent event, AvahiWatchCallback callback, void *userdata);

    void (*watch_update)(AvahiWatch *w, AvahiWatchEvent event);

    AvahiWatchEvent (*watch_get_events)(AvahiWatch *w);

    void (*watch_free)(AvahiWatch *w);

    AvahiTimeout* (*timeout_new)(const AvahiPoll *api, const struct timeval *tv, AvahiTimeoutCallback callback, void *userdata);

    void (*timeout_update)(AvahiTimeout *, const struct timeval *tv);

    void (*timeout_free)(AvahiTimeout *t);
};

AVAHI_C_DECL_END

#endif