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/*
This file is part of GNUnet.
Copyright (C) 2006, 2009 GNUnet e.V.
GNUnet is free software: you can redistribute it and/or modify it
under the terms of the GNU Affero General Public License as published
by the Free Software Foundation, either version 3 of the License,
or (at your option) any later version.
GNUnet 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
Affero General Public License for more details.
*/
/**
* @author Christian Grothoff
*
* @file
* Helper library for interning of peer identifiers
*
* @defgroup peer Peer library
* Helper library for interning of peer identifiers
* @{
*/
#ifndef GNUNET_PEER_LIB_H
#define GNUNET_PEER_LIB_H
#include "gnunet_util_lib.h"
#ifdef __cplusplus
extern "C"
{
#if 0 /* keep Emacsens' auto-indent happy */
}
#endif
#endif
/**
* A GNUNET_PEER_Id is simply a shorter version of a "struct
* GNUNET_PeerIdentifier" that can be used inside of a GNUnet peer to
* save memory when the same identifier needs to be used over and over
* again.
*/
typedef unsigned int GNUNET_PEER_Id;
/**
* Search for a peer identity. The reference counter is not changed.
*
* @param pid identity to find
* @return the interned identity or 0.
*/
GNUNET_PEER_Id
GNUNET_PEER_search (const struct GNUNET_PeerIdentity *pid);
/**
* Intern an peer identity. If the identity is already known, its
* reference counter will be increased by one.
*
* @param pid identity to intern
* @return the interned identity.
*/
GNUNET_PEER_Id
GNUNET_PEER_intern (const struct GNUNET_PeerIdentity *pid);
/**
* Change the reference counter of an interned PID.
*
* @param id identity to change the RC of
* @param delta how much to change the RC
*/
void
GNUNET_PEER_change_rc (GNUNET_PEER_Id id, int delta);
/**
* Decrement multiple RCs of peer identities by one.
*
* @param ids array of PIDs to decrement the RCs of
* @param count size of the @a ids array
*/
void
GNUNET_PEER_decrement_rcs (const GNUNET_PEER_Id *ids,
unsigned int count);
/**
* Convert an interned PID to a normal peer identity.
*
* @param id interned PID to convert
* @param pid where to write the normal peer identity
*/
void
GNUNET_PEER_resolve (GNUNET_PEER_Id id,
struct GNUNET_PeerIdentity *pid);
/**
* Convert an interned PID to a normal peer identity.
*
* @param id interned PID to convert
* @return pointer to peer identity, valid as long @a id is valid
*/
const struct GNUNET_PeerIdentity *
GNUNET_PEER_resolve2 (GNUNET_PEER_Id id);
#if 0 /* keep Emacsens' auto-indent happy */
{
#endif
#ifdef __cplusplus
}
#endif
/* ifndef GNUNET_PEER_LIB_H */
#endif
/** @} */ /* end of group */
/* end of gnunet_peer_lib.h */
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