56 lines
1.5 KiB
C
56 lines
1.5 KiB
C
/*
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* This file Copyright (C) 2007-2008 Charles Kerr <charles@transmissionbt.com>
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*
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* This file is licensed by the GPL version 2. Works owned by the
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* Transmission project are granted a special exemption to clause 2(b)
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* so that the bulk of its code can remain under the MIT license.
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* This exemption does not extend to derived works not owned by
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* the Transmission project.
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*
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* $Id$
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*/
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#ifndef __TRANSMISSION__
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#error only libtransmission should #include this header.
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#endif
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#ifndef _TR_PUBLISHER_H_
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#define _TR_PUBLISHER_H_
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/**
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*** A lightweight implementation of the 'Observable' design pattern.
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**/
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typedef struct tr_publisher_s tr_publisher_t;
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typedef void * tr_publisher_tag;
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typedef void tr_delivery_func ( void * source,
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void * event,
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void * user_data );
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/**
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*** Observer API
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**/
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tr_publisher_tag tr_publisherSubscribe( tr_publisher_t * publisher,
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tr_delivery_func delivery_func,
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void * user_data );
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void tr_publisherUnsubscribe( tr_publisher_t * publisher,
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tr_publisher_tag tag );
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/**
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*** Observable API
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**/
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tr_publisher_t * tr_publisherNew( void );
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void tr_publisherFree( tr_publisher_t ** publisher );
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void tr_publisherPublish( tr_publisher_t * publisher,
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void * source,
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void * event );
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#endif
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