id.h
上传用户:zhongxx05
上传日期:2007-06-06
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文件大小:5k
- /* ***** BEGIN LICENSE BLOCK *****
- * Version: RCSL 1.0/RPSL 1.0
- *
- * Portions Copyright (c) 1995-2002 RealNetworks, Inc. All Rights Reserved.
- *
- * The contents of this file, and the files included with this file, are
- * subject to the current version of the RealNetworks Public Source License
- * Version 1.0 (the "RPSL") available at
- * http://www.helixcommunity.org/content/rpsl unless you have licensed
- * the file under the RealNetworks Community Source License Version 1.0
- * (the "RCSL") available at http://www.helixcommunity.org/content/rcsl,
- * in which case the RCSL will apply. You may also obtain the license terms
- * directly from RealNetworks. You may not use this file except in
- * compliance with the RPSL or, if you have a valid RCSL with RealNetworks
- * applicable to this file, the RCSL. Please see the applicable RPSL or
- * RCSL for the rights, obligations and limitations governing use of the
- * contents of the file.
- *
- * This file is part of the Helix DNA Technology. RealNetworks is the
- * developer of the Original Code and owns the copyrights in the portions
- * it created.
- *
- * This file, and the files included with this file, is distributed and made
- * available on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND REALNETWORKS HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, FITNESS
- * FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
- *
- * Technology Compatibility Kit Test Suite(s) Location:
- * http://www.helixcommunity.org/content/tck
- *
- * Contributor(s):
- *
- * ***** END LICENSE BLOCK ***** */
- #ifndef CHXID_H
- #define CHXID_H
- #include "hlxclib/string.h" //for memset/memcpy
- #include "hxassert.h"
- /*
- * The whole table now is zero based and we return id+1 when they ask
- * for a new id, and return table[id-1] when they want the data.
- * In this way this class will actually WORK and all of the code using this
- * can still think a 0 return is bad.
- * -paulm
- */
- class CHXID
- {
- public:
- enum {
- DEFAULT_VALUE =0,
- TABLE_START_SIZE = 10000
- };
- CHXID(u_long32 size = TABLE_START_SIZE);
- ~CHXID();
- u_long32 create(void* ptr = (void*)DEFAULT_VALUE);
- void* destroy(u_long32 id);
- void* get(u_long32 id);
- void set(u_long32 id, void* ptr);
- u_long32 get_size();
- HX_RESULT m_LastError;
- private:
- u_long32 table_size;
- u_long32 increment_factor;
- u_long32 slots_used;
- u_long32 last_id;
- void** table_ptr;
- };
- inline
- CHXID::CHXID(u_long32 size)
- : m_LastError(HXR_OK)
- {
- ASSERT(size > 0);
- table_size = size;
- increment_factor = (table_size / 2) + 1;
- slots_used = 0;
- last_id = table_size-1;
- table_ptr = new void* [table_size];
- if(!table_ptr)
- {
- m_LastError = HXR_OUTOFMEMORY;
- return;
- }
- memset (table_ptr, DEFAULT_VALUE, table_size * sizeof(void*));
- }
- inline
- CHXID::~CHXID()
- {
- delete [] table_ptr;
- }
- inline void*
- CHXID::get(u_long32 id)
- {
- // This assert has been disabled to prevent udp resend packets
- // from killing the server. If a player has a bug in it and sends
- // a corrupted udp_packet it could return an id larger than the
- // table_size here. The udp_accept logic needs the DEFAULT_VALUE to
- // toss the bad packet.
- // ASSERT(id < table_size);
- id--;
- if (id < table_size)
- return table_ptr[id];
- else
- return (void*)DEFAULT_VALUE;
- }
- inline void
- CHXID::set(u_long32 id, void* ptr)
- {
- id--;
- ASSERT(id < table_size);
-
- if (id < table_size)
- table_ptr[id] = ptr;
- }
- inline u_long32
- CHXID::create(void* ptr)
- {
- if (slots_used > table_size * 0.7)
- {
- void** tmp_table_ptr = new void* [table_size + increment_factor];
- memcpy (tmp_table_ptr, table_ptr, table_size * sizeof(void*)); /* Flawfinder: ignore */
- memset (tmp_table_ptr + table_size, DEFAULT_VALUE, increment_factor * sizeof(void*));
- delete [] table_ptr;
- table_ptr = tmp_table_ptr;
-
- table_size += increment_factor;
- increment_factor = table_size / 2;
- }
- u_long32 new_id = (last_id + 1) % table_size;
- while(table_ptr[new_id] != (void*)DEFAULT_VALUE)
- new_id = (new_id + 1) % table_size;
- last_id = new_id;
- table_ptr[new_id] = ptr;
- slots_used++;
- return new_id+1;
- }
- inline void*
- CHXID::destroy(u_long32 id)
- {
- id--;
- ASSERT(id < table_size);
- if (id > table_size)
- {
- return 0;
- }
- void* ptr = table_ptr[id];
- if (ptr == (void*)DEFAULT_VALUE)
- return 0;
- table_ptr[id] = (void*)DEFAULT_VALUE;
- slots_used--;
- return ptr;
- }
- inline u_long32
- CHXID::get_size()
- {
- return table_size;
- }
- #endif