/* Deletes (frees) the Shared data it's passed. first it checks the referenceCounter to
* see if anyone is using it, if not it frees all the memory stemming from sharedConverterData and
* returns TRUE,
* otherwise returns FALSE
* @param sharedConverterData The shared data
* @return if not it frees all the memory stemming from sharedConverterData and
* returns TRUE, otherwise returns FALSE
*/
static UBool
ucnv_deleteSharedConverterData(UConverterSharedData * deadSharedData)
{
UTRACE_ENTRY_OC(UTRACE_UCNV_UNLOAD);
UTRACE_DATA2(UTRACE_OPEN_CLOSE, "unload converter %s shared data %p", deadSharedData->staticData->name, deadSharedData);
if (deadSharedData->referenceCounter > 0) {
UTRACE_EXIT_VALUE((int32_t)FALSE);
return FALSE;
}
if (deadSharedData->impl->unload != NULL) {
deadSharedData->impl->unload(deadSharedData);
}
if(deadSharedData->dataMemory != NULL)
{
UDataMemory *data = (UDataMemory*)deadSharedData->dataMemory;
udata_close(data);
}
if(deadSharedData->table != NULL)
{
uprv_free(deadSharedData->table);
}
#if 0
/* if the static data is actually owned by the shared data */
/* enable if we ever have this situation. */
if(deadSharedData->staticDataOwned == TRUE) /* see ucnv_bld.h */
{
uprv_free((void*)deadSharedData->staticData);
}
#endif
#if 0
/* Zap it ! */
uprv_memset(deadSharedData->0, sizeof(*deadSharedData));
#endif
uprv_free(deadSharedData);
UTRACE_EXIT_VALUE((int32_t)TRUE);
return TRUE;
}
U_CAPI int32_t U_EXPORT2
ucol_getSortKey(const UCollator *coll,
const UChar *source,
int32_t sourceLength,
uint8_t *result,
int32_t resultLength)
{
UTRACE_ENTRY(UTRACE_UCOL_GET_SORTKEY);
if (UTRACE_LEVEL(UTRACE_VERBOSE)) {
UTRACE_DATA3(UTRACE_VERBOSE, "coll=%p, source string = %vh ", coll, source,
((sourceLength==-1 && source!=NULL) ? u_strlen(source) : sourceLength));
}
int32_t keySize = Collator::fromUCollator(coll)->
getSortKey(source, sourceLength, result, resultLength);
UTRACE_DATA2(UTRACE_VERBOSE, "Sort Key = %vb", result, keySize);
UTRACE_EXIT_VALUE(keySize);
return keySize;
}
/*Frees all shared immutable objects that aren't referred to (reference count = 0)
*/
U_CAPI int32_t U_EXPORT2
ucnv_flushCache ()
{
UConverterSharedData *mySharedData = NULL;
int32_t pos;
int32_t tableDeletedNum = 0;
const UHashElement *e;
UErrorCode status = U_ILLEGAL_ARGUMENT_ERROR;
int32_t i, remaining;
UTRACE_ENTRY_OC(UTRACE_UCNV_FLUSH_CACHE);
/* Close the default converter without creating a new one so that everything will be flushed. */
ucnv_close(u_getDefaultConverter(&status));
/*if shared data hasn't even been lazy evaluated yet
* return 0
*/
if (SHARED_DATA_HASHTABLE == NULL) {
UTRACE_EXIT_VALUE((int32_t)0);
return 0;
}
/*creates an enumeration to iterate through every element in the
* table
*
* Synchronization: holding cnvCacheMutex will prevent any other thread from
* accessing or modifying the hash table during the iteration.
* The reference count of an entry may be decremented by
* ucnv_close while the iteration is in process, but this is
* benign. It can't be incremented (in ucnv_createConverter())
* because the sequence of looking up in the cache + incrementing
* is protected by cnvCacheMutex.
*/
umtx_lock(&cnvCacheMutex);
/*
* double loop: A delta/extension-only converter has a pointer to its base table's
* shared data; the first iteration of the outer loop may see the delta converter
* before the base converter, and unloading the delta converter may get the base
* converter's reference counter down to 0.
*/
i = 0;
do {
remaining = 0;
pos = -1;
while ((e = uhash_nextElement (SHARED_DATA_HASHTABLE, &pos)) != NULL)
{
mySharedData = (UConverterSharedData *) e->value.pointer;
/*deletes only if reference counter == 0 */
if (mySharedData->referenceCounter == 0)
{
tableDeletedNum++;
UCNV_DEBUG_LOG("del",mySharedData->staticData->name,mySharedData);
uhash_removeElement(SHARED_DATA_HASHTABLE, e);
mySharedData->sharedDataCached = FALSE;
ucnv_deleteSharedConverterData (mySharedData);
} else {
++remaining;
}
}
} while(++i == 1 && remaining > 0);
umtx_unlock(&cnvCacheMutex);
UTRACE_DATA1(UTRACE_INFO, "ucnv_flushCache() exits with %d converters remaining", remaining);
ucnv_io_flushAvailableConverterCache();
UTRACE_EXIT_VALUE(tableDeletedNum);
return tableDeletedNum;
}
