/*
This file is part of GNUnet
- (C) 2006, 2008, 2009 Christian Grothoff (and other contributing authors)
+ Copyright (C) 2006, 2008, 2009 GNUnet e.V.
GNUnet is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published
- by the Free Software Foundation; either version 2, or (at your
+ by the Free Software Foundation; either version 3, or (at your
option) any later version.
GNUnet is distributed in the hope that it will be useful, but
* @brief peer-ID table that assigns integer IDs to peer-IDs to save memory
* @author Christian Grothoff
*/
-
#include "platform.h"
#include "gnunet_peer_lib.h"
+#define LOG(kind,...) GNUNET_log_from (kind, "util-peer", __VA_ARGS__)
+
struct PeerEntry
{
/**
* Table with our interned peer IDs.
*/
-static struct PeerEntry *table;
+static struct PeerEntry **table;
/**
- * Hashmap of PeerIdentities to "struct PeerEntry"
+ * Peermap of PeerIdentities to "struct PeerEntry"
* (for fast lookup). NULL until the library
* is actually being used.
*/
-static struct GNUNET_CONTAINER_MultiHashMap *map;
+static struct GNUNET_CONTAINER_MultiPeerMap *map;
/**
* Size of the "table".
static unsigned int free_list_start;
+/**
+ * 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)
+{
+ struct PeerEntry *e;
+
+ if (NULL == pid)
+ return 0;
+ if (NULL == map)
+ return 0;
+ e = GNUNET_CONTAINER_multipeermap_get (map, pid);
+ if (NULL == e)
+ return 0;
+ GNUNET_assert (e->rc > 0);
+ return e->pid;
+}
+
+
/**
* Intern an peer identity. If the identity is already known, its
* reference counter will be increased by one.
struct PeerEntry *e;
unsigned int i;
- if (pid == NULL)
+ if (NULL == pid)
return 0;
if (NULL == map)
- map = GNUNET_CONTAINER_multihashmap_create (32);
- e = GNUNET_CONTAINER_multihashmap_get (map, &pid->hashPubKey);
- if (e != NULL)
- {
- GNUNET_assert (e->rc > 0);
- e->rc++;
- return e->pid;
- }
+ map = GNUNET_CONTAINER_multipeermap_create (32, GNUNET_YES);
+ e = GNUNET_CONTAINER_multipeermap_get (map, pid);
+ if (NULL != e)
+ {
+ GNUNET_assert (e->rc > 0);
+ e->rc++;
+ return e->pid;
+ }
ret = free_list_start;
if (ret == size)
+ {
+ GNUNET_array_grow (table, size, size + 16);
+ for (i = ret; i < size; i++)
{
- GNUNET_array_grow (table, size, size + 16);
- for (i = ret; i < size; i++)
- table[i].pid = i + 1;
- }
- if (ret == 0)
- {
- table[0].pid = 0;
- table[0].rc = 1;
- ret = 1;
+ table[i] = GNUNET_new (struct PeerEntry);
+ table[i]->pid = i + 1;
}
+ }
+ if (0 == ret)
+ {
+ memset (&table[0]->id, 0, sizeof (struct GNUNET_PeerIdentity));
+ table[0]->pid = 0;
+ table[0]->rc = 1;
+ ret = 1;
+ }
GNUNET_assert (ret < size);
- GNUNET_assert (table[ret].rc == 0);
- free_list_start = table[ret].pid;
- table[ret].id = *pid;
- table[ret].rc = 1;
- table[ret].pid = ret;
+ GNUNET_assert (0 == table[ret]->rc);
+ free_list_start = table[ret]->pid;
+ table[ret]->id = *pid;
+ table[ret]->rc = 1;
+ table[ret]->pid = ret;
GNUNET_break (GNUNET_OK ==
- GNUNET_CONTAINER_multihashmap_put (map,
- &pid->hashPubKey,
- &table[ret],
- GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
+ GNUNET_CONTAINER_multipeermap_put (map,
+ &table[ret]->id,
+ table[ret],
+ GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
return ret;
}
/**
* Decrement multiple RCs of peer identities by one.
- *
+ *
* @param ids array of PIDs to decrement the RCs of
* @param count size of the ids array
*/
void
-GNUNET_PEER_decrement_rcs (const GNUNET_PEER_Id * ids, unsigned int count)
+GNUNET_PEER_decrement_rcs (const GNUNET_PEER_Id *ids, unsigned int count)
{
int i;
GNUNET_PEER_Id id;
- if (count == 0)
+ if (0 == count)
return;
for (i = count - 1; i >= 0; i--)
+ {
+ id = ids[i];
+ if (0 == id)
+ continue;
+ GNUNET_assert (id < size);
+ GNUNET_assert (table[id]->rc > 0);
+ table[id]->rc--;
+ if (0 == table[id]->rc)
{
- id = ids[i];
- if (id == 0)
- continue;
- GNUNET_assert (id < size);
- GNUNET_assert (table[id].rc > 0);
- table[id].rc--;
- if (table[id].rc == 0)
- {
- GNUNET_break (GNUNET_OK ==
- GNUNET_CONTAINER_multihashmap_remove (map,
- &table[id].id.hashPubKey,
- &table[id]));
- table[id].pid = free_list_start;
- free_list_start = id;
- }
+ GNUNET_break (GNUNET_OK ==
+ GNUNET_CONTAINER_multipeermap_remove (map,
+ &table[id]->id,
+ table[id]));
+ table[id]->pid = free_list_start;
+ free_list_start = id;
}
+ }
}
void
GNUNET_PEER_change_rc (GNUNET_PEER_Id id, int delta)
{
- if (id == 0)
+ if (0 == id)
return;
GNUNET_assert (id < size);
- GNUNET_assert (table[id].rc > 0);
- GNUNET_assert ((delta >= 0) || (table[id].rc >= -delta));
- table[id].rc += delta;
- if (table[id].rc == 0)
- {
- GNUNET_break (GNUNET_OK ==
- GNUNET_CONTAINER_multihashmap_remove (map,
- &table[id].id.hashPubKey,
- &table[id]));
- table[id].pid = free_list_start;
- free_list_start = id;
- }
+ GNUNET_assert (table[id]->rc > 0);
+ GNUNET_assert ((delta >= 0) || (table[id]->rc >= -delta));
+ table[id]->rc += delta;
+ if (0 == table[id]->rc)
+ {
+ GNUNET_break (GNUNET_OK ==
+ GNUNET_CONTAINER_multipeermap_remove (map,
+ &table[id]->id,
+ table[id]));
+ table[id]->pid = free_list_start;
+ free_list_start = id;
+ }
}
void
GNUNET_PEER_resolve (GNUNET_PEER_Id id, struct GNUNET_PeerIdentity *pid)
{
- if (id == 0)
- {
- memset (pid, 0, sizeof (struct GNUNET_PeerIdentity));
- GNUNET_break (0);
- return;
- }
+ if (0 == id)
+ {
+ memset (pid, 0, sizeof (struct GNUNET_PeerIdentity));
+ return;
+ }
+ GNUNET_assert (id < size);
+ GNUNET_assert (table[id]->rc > 0);
+ *pid = table[id]->id;
+}
+
+
+/**
+ * Convert an interned PID to a normal peer identity.
+ *
+ * @param id interned PID to convert
+ * @return pointer to peer identity, valid as long 'id' is valid
+ */
+const struct GNUNET_PeerIdentity *
+GNUNET_PEER_resolve2 (GNUNET_PEER_Id id)
+{
GNUNET_assert (id < size);
- GNUNET_assert (table[id].rc > 0);
- *pid = table[id].id;
+ GNUNET_assert (table[id]->rc > 0);
+ return &table[id]->id;
}
+
/* end of peer.c */
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