98 lines
2.4 KiB
C
98 lines
2.4 KiB
C
/*
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*******************************************************************************
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*
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* Copyright (C) 1998-1999, International Business Machines
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* Corporation and others. All Rights Reserved.
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*
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*******************************************************************************
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*
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* File loccache.c
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*
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* Modification History:
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*
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* Date Name Description
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* 11/18/98 stephen Creation.
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* 03/11/99 stephen Modified for new C API.
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* 06/16/99 stephen Added #include for uloc.h
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*******************************************************************************
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*/
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#include "loccache.h"
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#include "unicode/uloc.h"
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#include "umutex.h"
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/* The global cache */
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UHashtable *gLocaleCache = 0;
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/* my custom hashing function */
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int32_t
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u_locbund_hash(const void *parm)
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{
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return uhash_hashString(((ULocaleBundle*)parm)->fLocale);
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}
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ULocaleBundle*
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u_loccache_get(const char *loc)
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{
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ULocaleBundle *result;
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ULocaleBundle *tempBundle;
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/*Mutex *lock;*/
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UHashtable *tempCache;
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int32_t locCount;
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int32_t hashKey;
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UErrorCode status = U_ZERO_ERROR;
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/* Create the cache, if needed */
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if(gLocaleCache == 0) {
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locCount = uloc_countAvailable();
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tempCache = uhash_openSize((UHashFunction)u_locbund_hash, locCount, &status);
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if(U_FAILURE(status)) return 0;
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/* Lock the cache */
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umtx_lock(0);
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/* Make sure it didn't change while we were acquiring the lock */
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if(gLocaleCache == 0) {
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gLocaleCache = tempCache;
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}
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else {
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uhash_close(tempCache);
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}
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/* Unlock the cache */
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umtx_unlock(0);
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}
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/* Try and get the bundle from the cache */
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/* This will be slightly wasteful the first time around, */
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/* since we know the cache will be empty. But, it simplifies */
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/* the code a great deal. */
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hashKey = uhash_hashString(loc);
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result = uhash_get(gLocaleCache, hashKey);
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/* If the bundle wasn't found, create it and add it to the cache */
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if(result == 0) {
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/* Create the bundle */
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tempBundle = u_locbund_new(loc);
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/* Lock the cache */
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umtx_lock(0);
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/* Make sure the cache didn't change while we were locking it */
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result = uhash_get(gLocaleCache, hashKey);
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if(result == 0) {
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result = tempBundle;
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uhash_put(gLocaleCache, result, &status);
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}
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else
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u_locbund_delete(tempBundle);
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/* Unlock the cache */
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umtx_unlock(0);
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}
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return result;
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}
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