// 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;
}
// 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;
}