transmission/libtransmission/publish.h

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/*
2008-12-16 00:20:44 +00:00
* This file Copyright (C) 2007-2008 Charles Kerr <charles@transmissionbt.com>
*
* This file is licensed by the GPL version 2. Works owned by the
* Transmission project are granted a special exemption to clause 2(b)
* so that the bulk of its code can remain under the MIT license.
* This exemption does not extend to derived works not owned by
* the Transmission project.
*
2007-08-18 17:19:49 +00:00
* $Id$
*/
#ifndef __TRANSMISSION__
#error only libtransmission should #include this header.
#endif
#ifndef _TR_PUBLISHER_H_
#define _TR_PUBLISHER_H_
struct tr_list;
/**
*** A lightweight implementation of the 'Observable' design pattern.
**/
typedef struct tr_publisher
{
struct tr_list * list;
}
tr_publisher;
typedef void * tr_publisher_tag;
typedef void tr_delivery_func ( void * source,
void * event,
void * user_data );
/**
*** Observer API
**/
tr_publisher_tag tr_publisherSubscribe( tr_publisher * publisher,
tr_delivery_func delivery_func,
void * user_data );
void tr_publisherUnsubscribe( tr_publisher * publisher,
tr_publisher_tag tag );
/**
*** Observable API
**/
extern const tr_publisher TR_PUBLISHER_INIT;
void tr_publisherDestruct( tr_publisher * );
void tr_publisherPublish( tr_publisher * publisher,
void * source,
void * event );
#endif