static int32_t
usprep_internal_flushCache(UBool noRefCount)
{
UStringPrepProfile * profile = NULL;
UStringPrepKey * key = NULL;
int32_t pos = -1;
int32_t deletedNum = 0;
const UHashElement * e;
/*
* if shared data hasn't even been lazy evaluated yet
* return 0
*/
umtx_lock(&usprepMutex);
if (SHARED_DATA_HASHTABLE == NULL)
{
umtx_unlock(&usprepMutex);
return 0;
}
/*creates an enumeration to iterate through every element in the table */
while ((e = uhash_nextElement(SHARED_DATA_HASHTABLE, &pos)) != NULL)
{
profile = (UStringPrepProfile *) e->value.pointer;
key = (UStringPrepKey *) e->key.pointer;
if ((noRefCount == FALSE && profile->refCount == 0) ||
noRefCount == TRUE)
{
deletedNum++;
uhash_removeElement(SHARED_DATA_HASHTABLE, e);
/* unload the data */
usprep_unload(profile);
if (key->name != NULL)
{
uprv_free(key->name);
key->name = NULL;
}
if (key->path != NULL)
{
uprv_free(key->path);
key->path = NULL;
}
uprv_free(profile);
uprv_free(key);
}
}
umtx_unlock(&usprepMutex);
return deletedNum;
}
U_CAPI void U_EXPORT2
uhash_removeAll(UHashtable *hash) {
int32_t pos = -1;
const UHashElement *e;
U_ASSERT(hash != NULL);
if (hash->count != 0) {
while ((e = uhash_nextElement(hash, &pos)) != NULL) {
uhash_removeElement(hash, e);
}
}
U_ASSERT(hash->count == 0);
}
// Flushes the contents of the cache. If cache values hold references to other
// cache values then _flush should be called in a loop until it returns FALSE.
// On entry, gCacheMutex must be held.
// On exit, those values with are evictable are flushed. If all is true
// then every value is flushed even if it is not evictable.
// Returns TRUE if any value in cache was flushed or FALSE otherwise.
UBool UnifiedCache::_flush(UBool all) const {
UBool result = FALSE;
int32_t origSize = uhash_count(fHashtable);
for (int32_t i = 0; i < origSize; ++i) {
const UHashElement *element = _nextElement();
if (all || _isEvictable(element)) {
const SharedObject *sharedObject =
(const SharedObject *) element->value.pointer;
uhash_removeElement(fHashtable, element);
sharedObject->removeSoftRef();
result = TRUE;
}
}
return result;
}
// Flushes the contents of the cache. If cache values hold references to other
// cache values then _flush should be called in a loop until it returns FALSE.
// On entry, gCacheMutex must be held.
// On exit, those values with only soft references are flushed. If all is true
// then every value is flushed even if hard references are held.
// Returns TRUE if any value in cache was flushed or FALSE otherwise.
UBool UnifiedCache::_flush(UBool all) const {
UBool result = FALSE;
int32_t pos = UHASH_FIRST;
const UHashElement *element = uhash_nextElement(fHashtable, &pos);
for (; element != NULL; element = uhash_nextElement(fHashtable, &pos)) {
const SharedObject *sharedObject =
(const SharedObject *) element->value.pointer;
if (all || sharedObject->allSoftReferences()) {
uhash_removeElement(fHashtable, element);
sharedObject->removeSoftRef();
result = TRUE;
}
}
return result;
}
// Run an eviction slice.
// On entry, gCacheMutex must be held.
// _runEvictionSlice runs a slice of the evict pipeline by examining the next
// 10 entries in the cache round robin style evicting them if they are eligible.
void UnifiedCache::_runEvictionSlice() const {
int32_t maxItemsToEvict = _computeCountOfItemsToEvict();
if (maxItemsToEvict <= 0) {
return;
}
for (int32_t i = 0; i < MAX_EVICT_ITERATIONS; ++i) {
const UHashElement *element = _nextElement();
if (_isEvictable(element)) {
const SharedObject *sharedObject =
(const SharedObject *) element->value.pointer;
uhash_removeElement(fHashtable, element);
sharedObject->removeSoftRef();
++fAutoEvictedCount;
if (--maxItemsToEvict == 0) {
break;
}
}
}
}
UBool UnifiedCache::_flush(UBool all) const {
UBool result = FALSE;
int32_t origSize = uhash_count(fHashtable);
for (int32_t i = 0; i < origSize; ++i) {
const UHashElement *element = _nextElement();
if (element == nullptr) {
break;
}
if (all || _isEvictable(element)) {
const SharedObject *sharedObject =
(const SharedObject *) element->value.pointer;
U_ASSERT(sharedObject->cachePtr == this);
uhash_removeElement(fHashtable, element);
removeSoftRef(sharedObject); // Deletes the sharedObject when softRefCount goes to zero.
result = TRUE;
}
}
return result;
}
U_CDECL_END
/**
* Function used for removing unreferrenced cache entries exceeding
* the expiration time. This function must be called with in the mutex
* block.
*/
static void sweepCache() {
int32_t pos = UHASH_FIRST;
const UHashElement* elem;
double now = (double)uprv_getUTCtime();
while ((elem = uhash_nextElement(gTZGNCoreCache, &pos))) {
TZGNCoreRef *entry = (TZGNCoreRef *)elem->value.pointer;
if (entry->refCount <= 0 && (now - entry->lastAccess) > CACHE_EXPIRATION) {
// delete this entry
uhash_removeElement(gTZGNCoreCache, elem);
}
}
}
IdentifierInfo &IdentifierInfo::setIdentifier(const UnicodeString &identifier, UErrorCode &status) {
if (U_FAILURE(status)) {
return *this;
}
*fIdentifier = identifier;
clear();
ScriptSet scriptsForCP;
UChar32 cp;
for (int32_t i = 0; i < identifier.length(); i += U16_LENGTH(cp)) {
cp = identifier.char32At(i);
// Store a representative character for each kind of decimal digit
if (u_charType(cp) == U_DECIMAL_DIGIT_NUMBER) {
// Just store the zero character as a representative for comparison. Unicode guarantees it is cp - value
fNumerics->add(cp - (UChar32)u_getNumericValue(cp));
}
UScriptCode extensions[500];
int32_t extensionsCount = uscript_getScriptExtensions(cp, extensions, UPRV_LENGTHOF(extensions), &status);
if (U_FAILURE(status)) {
return *this;
}
scriptsForCP.resetAll();
for (int32_t j=0; j<extensionsCount; j++) {
scriptsForCP.set(extensions[j], status);
}
scriptsForCP.reset(USCRIPT_COMMON, status);
scriptsForCP.reset(USCRIPT_INHERITED, status);
switch (scriptsForCP.countMembers()) {
case 0: break;
case 1:
// Single script, record it.
fRequiredScripts->Union(scriptsForCP);
break;
default:
if (!fRequiredScripts->intersects(scriptsForCP)
&& !uhash_geti(fScriptSetSet, &scriptsForCP)) {
// If the set hasn't been added already, add it
// (Add a copy, fScriptSetSet takes ownership of the copy.)
uhash_puti(fScriptSetSet, new ScriptSet(scriptsForCP), 1, &status);
}
break;
}
}
// Now make a final pass through ScriptSetSet to remove alternates that came before singles.
// [Kana], [Kana Hira] => [Kana]
// This is relatively infrequent, so doesn't have to be optimized.
// We also compute any commonalities among the alternates.
if (uhash_count(fScriptSetSet) > 0) {
fCommonAmongAlternates->setAll();
for (int32_t it = UHASH_FIRST;;) {
const UHashElement *nextHashEl = uhash_nextElement(fScriptSetSet, &it);
if (nextHashEl == NULL) {
break;
}
ScriptSet *next = static_cast<ScriptSet *>(nextHashEl->key.pointer);
// [Kana], [Kana Hira] => [Kana]
if (fRequiredScripts->intersects(*next)) {
uhash_removeElement(fScriptSetSet, nextHashEl);
} else {
fCommonAmongAlternates->intersect(*next);
// [[Arab Syrc Thaa]; [Arab Syrc]] => [[Arab Syrc]]
for (int32_t otherIt = UHASH_FIRST;;) {
const UHashElement *otherHashEl = uhash_nextElement(fScriptSetSet, &otherIt);
if (otherHashEl == NULL) {
break;
}
ScriptSet *other = static_cast<ScriptSet *>(otherHashEl->key.pointer);
if (next != other && next->contains(*other)) {
uhash_removeElement(fScriptSetSet, nextHashEl);
break;
}
}
}
}
}
if (uhash_count(fScriptSetSet) == 0) {
fCommonAmongAlternates->resetAll();
}
return *this;
}
/*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;
}