123 lines
3.1 KiB
C
123 lines
3.1 KiB
C
/*
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*******************************************************************************
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*
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* Copyright (C) 1998-2002, 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 "unicode/utypes.h"
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#if !UCONFIG_NO_FORMATTING
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#include "loccache.h"
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#include "uhash.h"
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#include "unicode/uloc.h"
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#include "umutex.h"
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#include "ucln.h"
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/* The global cache */
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UHashtable *gLocaleCache = NULL;
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static void U_CALLCONV
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hash_freeBundle(void* obj)
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{
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u_locbund_delete((ULocaleBundle *)obj);
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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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UErrorCode status = U_ZERO_ERROR;
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/* Create the cache, if needed */
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if(gLocaleCache == NULL) {
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UHashtable *tempCache;
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int32_t locCount = uloc_countAvailable();
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tempCache = uhash_openSize(uhash_hashChars, uhash_compareChars, locCount, &status);
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if(U_FAILURE(status))
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return NULL;
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uhash_setValueDeleter(tempCache, hash_freeBundle);
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/* Lock the cache */
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umtx_lock(NULL);
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/* Make sure it didn't change while we were acquiring the lock */
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if(gLocaleCache == NULL) {
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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(NULL);
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ucln_ustdio_registerCleanup();
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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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result = (ULocaleBundle*)uhash_get(gLocaleCache, loc);
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/* If the bundle wasn't found, create it and add it to the cache */
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if(result == NULL) {
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/* Create the bundle */
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ULocaleBundle *tempBundle = u_locbund_new(loc);
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/* Lock the cache */
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umtx_lock(NULL);
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/* Make sure the cache didn't change while we were locking it */
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result = (ULocaleBundle*)uhash_get(gLocaleCache, loc);
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if(result == NULL) {
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result = tempBundle;
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uhash_put(gLocaleCache, tempBundle->fLocale, tempBundle, &status);
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}
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else {
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u_locbund_delete(tempBundle);
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}
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/* Unlock the cache */
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umtx_unlock(NULL);
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}
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return result;
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}
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static UBool loccache_cleanup()
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{
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if (gLocaleCache) {
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uhash_close(gLocaleCache);
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gLocaleCache = NULL;
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}
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return TRUE; /* Everything was cleaned up */
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}
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static UBool ustdio_cleanup(void)
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{
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return loccache_cleanup();
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}
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void ucln_ustdio_registerCleanup()
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{
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ucln_registerCleanup(UCLN_USTDIO, ustdio_cleanup);
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}
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#endif /* #if !UCONFIG_NO_FORMATTING */
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