kc3-lang/libevent/bufferevent-internal.h

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• Hash : 682adc44
  Author :
  Date : 2008-04-30T00:09:16
  

  support input/output filters for bufferevents
  
  svn:r748
  

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• bufferevent-internal.h

• /*
   * Copyright (c) 2008 Niels Provos <provos@citi.umich.edu>
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   * 3. The name of the author may not be used to endorse or promote products
   *    derived from this software without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   */
  #ifndef _BUFFEREVENT_INTERNAL_H_
  #define _BUFFEREVENT_INTERNAL_H_
  
  #ifdef __cplusplus
  extern "C" {
  #endif
  
  #include "config.h"
  #include "evutil.h"
  
  struct bufferevent_filter {
  	/** allows chaining of filters */
  	TAILQ_ENTRY(bufferevent_filter) (next);
  
  	/** used for intermediary state either on the input or output path */
  	struct evbuffer *buffer;
  
  	/** initializes the context provided to process */
  	void (*init_context)(void *);
  
  	/** frees any context related to ctx */
  	void (*free_context)(void *);
  
  	enum bufferevent_filter_result (*process)(
  		struct evbuffer *src, struct evbuffer *dst,
  		enum bufferevent_filter_state flags, void *ctx);
  
  	void *ctx;
  };
  
  #ifdef __cplusplus
  }
  #endif
  
  #endif /* _BUFFEREVENT_INTERNAL_H_ */
  

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