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/*
* Copyright (c) 2018 Cisco and/or its affiliates.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package io.fd.hc2vpp.it.jvpp.benchmark.classify;
import io.fd.vpp.jvpp.core.dto.ClassifyAddDelTable;
import java.util.Random;
import javax.annotation.concurrent.NotThreadSafe;
@NotThreadSafe
class ClassifyTableProviderImpl implements ClassifyTableProvider {
/**
* Static seed to make rnd.nextBytes() output the same for all test run.
*/
private static final long SEED = -2084670072119134328L;
private final int tableSetSize;
private final ClassifyAddDelTable[] tables;
private final Random rnd = new Random(SEED);
/**
* Pointer to Classify table to be returned by invocation of {@link #next()} method.
*/
private int currentTable = 0;
ClassifyTableProviderImpl(final int tableSetSize) {
this.tableSetSize = tableSetSize;
tables = new ClassifyAddDelTable[tableSetSize];
initTables(tableSetSize);
}
@Override
public ClassifyAddDelTable next() {
final ClassifyAddDelTable result = tables[currentTable];
currentTable = (currentTable + 1) % tableSetSize;
return result;
}
private void initTables(final int tableSetSize) {
for (int i = 0; i < tableSetSize; ++i) {
tables[i] = createTable();
}
}
private ClassifyAddDelTable createTable() {
final ClassifyAddDelTable addDelTable = new ClassifyAddDelTable();
addDelTable.isAdd = 1;
addDelTable.tableIndex = -1;
addDelTable.nbuckets = 2;
addDelTable.memorySize = 2 << 20;
addDelTable.nextTableIndex = ~0;
addDelTable.missNextIndex = ~0;
addDelTable.skipNVectors = 0;
addDelTable.matchNVectors = 1;
addDelTable.mask = new byte[16];
addDelTable.maskLen = 16;
rnd.nextBytes(addDelTable.mask);
return addDelTable;
}
}
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