| /* |
| ******************************************************************************* |
| * Copyright (C) 1997-1999, International Business Machines Corporation and * |
| * others. All Rights Reserved. * |
| ******************************************************************************* |
| */ |
| //=============================================================================== |
| // |
| // File colcache.cpp |
| // |
| // CollationCache implements a persistent in-memory cache for |
| // TableCollationData objects. The goal of CollationCache is to improve |
| // the memory footprint of a process which may have multiple threads |
| // loading up the same TableCollation object. Performance improvement is |
| // strictly a secondary goal. |
| // |
| // Created by: Alan Liu |
| // |
| // Modification History: |
| // |
| // Date Name Description |
| // 2/11/97 aliu Creation. |
| // 2/12/97 aliu Modified to work with TableCollationData. |
| // |
| //=============================================================================== |
| |
| #include "colcache.h" |
| #include "tcoldata.h" |
| #include "uhash.h" |
| |
| #ifdef COLLDEBUG |
| #include <iostream.h> |
| #endif |
| |
| //-------------------------------------------------------------------------------- |
| // CollationCache implementation |
| //-------------------------------------------------------------------------------- |
| |
| static void U_CALLCONV deleteTCD(void* TCD) |
| { |
| delete (TableCollationData*)TCD; |
| } |
| |
| CollationCache::CollationCache() |
| { |
| UErrorCode err = U_ZERO_ERROR; |
| fHashtable = uhash_open((UHashFunction) uhash_hashUString, &err); |
| uhash_setValueDeleter(fHashtable, deleteTCD); |
| } |
| |
| |
| CollationCache::~CollationCache() |
| { |
| uhash_close(fHashtable); |
| } |
| |
| void CollationCache::Add(const UnicodeString& key, TableCollationData* value) |
| { |
| UErrorCode err = U_ZERO_ERROR; |
| TableCollationData* previous = (TableCollationData*)uhash_putKey(fHashtable, key.hashCode() & 0x7FFFFFFF , value, &err); |
| } |
| |
| TableCollationData* CollationCache::Find(const UnicodeString& keyString) |
| { |
| return (TableCollationData*)uhash_get(fHashtable,keyString.hashCode() & 0x7FFFFFFF); |
| } |
| |
| //eof |
