Esempio n. 1
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;
}
Esempio n. 2
0
// 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;
            }
        }
    }
}
Esempio n. 3
0
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;
}