| 1 | /* $Id: strcache.h 44529 2013-02-04 15:54:15Z vboxsync $ */
|
|---|
| 2 | /** @file
|
|---|
| 3 | * IPRT - String Cache, stub implementation.
|
|---|
| 4 | */
|
|---|
| 5 |
|
|---|
| 6 | /*
|
|---|
| 7 | * Copyright (C) 2009-2010 Oracle Corporation
|
|---|
| 8 | *
|
|---|
| 9 | * This file is part of VirtualBox Open Source Edition (OSE), as
|
|---|
| 10 | * available from http://www.virtualbox.org. This file is free software;
|
|---|
| 11 | * you can redistribute it and/or modify it under the terms of the GNU
|
|---|
| 12 | * General Public License (GPL) as published by the Free Software
|
|---|
| 13 | * Foundation, in version 2 as it comes in the "COPYING" file of the
|
|---|
| 14 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
|
|---|
| 15 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
|
|---|
| 16 | *
|
|---|
| 17 | * The contents of this file may alternatively be used under the terms
|
|---|
| 18 | * of the Common Development and Distribution License Version 1.0
|
|---|
| 19 | * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
|
|---|
| 20 | * VirtualBox OSE distribution, in which case the provisions of the
|
|---|
| 21 | * CDDL are applicable instead of those of the GPL.
|
|---|
| 22 | *
|
|---|
| 23 | * You may elect to license modified versions of this file under the
|
|---|
| 24 | * terms and conditions of either the GPL or the CDDL or both.
|
|---|
| 25 | */
|
|---|
| 26 |
|
|---|
| 27 | #ifndef ___iprt_strcache_h
|
|---|
| 28 | #define ___iprt_strcache_h
|
|---|
| 29 |
|
|---|
| 30 | #include <iprt/types.h>
|
|---|
| 31 |
|
|---|
| 32 | RT_C_DECLS_BEGIN
|
|---|
| 33 |
|
|---|
| 34 |
|
|---|
| 35 | /**
|
|---|
| 36 | * Create a new string cache.
|
|---|
| 37 | *
|
|---|
| 38 | * @returns IPRT status code
|
|---|
| 39 | *
|
|---|
| 40 | * @param phStrCache Where to return the string cache handle.
|
|---|
| 41 | * @param pszName The name of the cache (for debug purposes).
|
|---|
| 42 | */
|
|---|
| 43 | RTDECL(int) RTStrCacheCreate(PRTSTRCACHE phStrCache, const char *pszName);
|
|---|
| 44 |
|
|---|
| 45 |
|
|---|
| 46 | /**
|
|---|
| 47 | * Destroys a string cache.
|
|---|
| 48 | *
|
|---|
| 49 | * This will cause all strings in the cache to be released and thus become
|
|---|
| 50 | * invalid.
|
|---|
| 51 | *
|
|---|
| 52 | * @returns IPRT status.
|
|---|
| 53 | *
|
|---|
| 54 | * @param hStrCache Handle to the string cache. The nil and default
|
|---|
| 55 | * handles are ignored quietly (VINF_SUCCESS).
|
|---|
| 56 | */
|
|---|
| 57 | RTDECL(int) RTStrCacheDestroy(RTSTRCACHE hStrCache);
|
|---|
| 58 |
|
|---|
| 59 |
|
|---|
| 60 | /**
|
|---|
| 61 | * Enters a string into the cache.
|
|---|
| 62 | *
|
|---|
| 63 | * @returns Pointer to a read-only copy of the string.
|
|---|
| 64 | *
|
|---|
| 65 | * @param hStrCache Handle to the string cache.
|
|---|
| 66 | * @param pchString Pointer to a string. This does not need to be
|
|---|
| 67 | * zero terminated, but must not contain any zero
|
|---|
| 68 | * characters.
|
|---|
| 69 | * @param cchString The number of characters (bytes) to enter.
|
|---|
| 70 | *
|
|---|
| 71 | * @remarks It is implementation dependent whether the returned string pointer
|
|---|
| 72 | * differs when entering the same string twice.
|
|---|
| 73 | */
|
|---|
| 74 | RTDECL(const char *) RTStrCacheEnterN(RTSTRCACHE hStrCache, const char *pchString, size_t cchString);
|
|---|
| 75 |
|
|---|
| 76 | /**
|
|---|
| 77 | * Enters a string into the cache.
|
|---|
| 78 | *
|
|---|
| 79 | * @returns Pointer to a read-only copy of the string.
|
|---|
| 80 | *
|
|---|
| 81 | * @param hStrCache Handle to the string cache.
|
|---|
| 82 | * @param psz Pointer to a zero terminated string.
|
|---|
| 83 | *
|
|---|
| 84 | * @remarks See RTStrCacheEnterN.
|
|---|
| 85 | */
|
|---|
| 86 | RTDECL(const char *) RTStrCacheEnter(RTSTRCACHE hStrCache, const char *psz);
|
|---|
| 87 |
|
|---|
| 88 |
|
|---|
| 89 | /**
|
|---|
| 90 | * Retains a reference to a string.
|
|---|
| 91 | *
|
|---|
| 92 | * @returns The new reference count. UINT32_MAX is returned if the string
|
|---|
| 93 | * pointer is invalid.
|
|---|
| 94 | */
|
|---|
| 95 | RTDECL(uint32_t) RTStrCacheRetain(const char *psz);
|
|---|
| 96 |
|
|---|
| 97 | /**
|
|---|
| 98 | * Releases a reference to a string.
|
|---|
| 99 | *
|
|---|
| 100 | * @returns The new reference count.
|
|---|
| 101 | * UINT32_MAX is returned if the string pointer is invalid.
|
|---|
| 102 | *
|
|---|
| 103 | * @param hStrCache Handle to the string cache. Passing NIL is ok,
|
|---|
| 104 | * but this may come a performance hit.
|
|---|
| 105 | * @param psz Pointer to a cached string.
|
|---|
| 106 | */
|
|---|
| 107 | RTDECL(uint32_t) RTStrCacheRelease(RTSTRCACHE hStrCache, const char *psz);
|
|---|
| 108 |
|
|---|
| 109 | /**
|
|---|
| 110 | * Gets the string length of a cache entry.
|
|---|
| 111 | *
|
|---|
| 112 | * @returns The string length. 0 if the string is invalid (asserted).
|
|---|
| 113 | *
|
|---|
| 114 | * @param psz Pointer to a cached string.
|
|---|
| 115 | */
|
|---|
| 116 | RTDECL(size_t) RTStrCacheLength(const char *psz);
|
|---|
| 117 |
|
|---|
| 118 | RT_C_DECLS_END
|
|---|
| 119 |
|
|---|
| 120 | #endif
|
|---|
| 121 |
|
|---|
