strcache.cpp revision c58f1213e628a545081c70e26c6b67a841cff880
/* $Id$ */
/** @file
* IPRT - String Cache.
*/
/*
* Copyright (C) 2010 Oracle Corporation
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* General Public License (GPL) as published by the Free Software
* Foundation, in version 2 as it comes in the "COPYING" file of the
* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL) only, as it comes in the "COPYING.CDDL" file of the
* VirtualBox OSE distribution, in which case the provisions of the
* CDDL are applicable instead of those of the GPL.
*
* You may elect to license modified versions of this file under the
* terms and conditions of either the GPL or the CDDL or both.
*/
/*******************************************************************************
* Header Files *
*******************************************************************************/
#include <iprt/strcache.h>
/*******************************************************************************
* Structures and Typedefs *
*******************************************************************************/
/**
* String cache entry.
*
* Each entry is
*/
typedef struct RTSTRCACHEENTRY
{
/** The number of references. */
/** Offset into the chunk (bytes). */
/** The string length. */
/** The primary hash value. */
/** The string. */
char szString[16];
/** Pointer to a string cache entry. */
typedef RTSTRCACHEENTRY *PRTSTRCACHEENTRY;
/** Pointer to a const string cache entry. */
typedef RTSTRCACHEENTRY *PCRTSTRCACHEENTRY;
/**
* Allocation chunk.
*/
typedef struct RTSTRCACHECHUNK
{
/** Pointer to the main string cache structure. */
struct RTSTRCACHEINT *pCache;
/** Padding to align the entries on a 32-byte boundary. */
/** The index of the first unused entry. */
/** The number of used entries. */
/** The number of entries in this chunk. */
/** The string cache entries, variable size. */
typedef struct RTSTRCACHEINT
{
/** The string cache magic (RTSTRCACHE_MAGIC). */
/*******************************************************************************
* Defined Constants And Macros *
*******************************************************************************/
/** Validates a string cache handle, translating RTSTRCACHE_DEFAULT when found,
* and returns rc if not valid. */
do { \
if ((pStrCache) == RTMEMPOOL_DEFAULT) \
(pStrCache) = &g_rtMemPoolDefault; \
else \
{ \
} \
} while (0)
/** Validates a memory pool entry and returns rc if not valid. */
do { \
} while (0)
/*******************************************************************************
* Global Variables *
*******************************************************************************/
{
}
{
if ( hStrCache == NIL_RTSTRCACHE
|| hStrCache == RTSTRCACHE_DEFAULT)
return VINF_SUCCESS;
}
RTDECL(const char *) RTStrCacheEnterN(RTSTRCACHE hStrCache, const char *pchString, size_t cchString)
{
}
{
}
{
return RTMemPoolRetain((void *)psz);
}
{
if (!psz)
return 0;
}
{
if (!psz)
return 0;
}