9ee1704859
1. MonoTime/MonoDelta MonoTime: The MonoTime represents a particular point in time, relative to some fixed but unspecified reference point. MonoDelta: The MonoDelta class represents an elapsed duration of time, the delta between two MonoTime instances. 2. CountDownLatch This is a C++ implementation of the Java CountDownLatch
80 lines
2.6 KiB
C++
80 lines
2.6 KiB
C++
// Licensed to the Apache Software Foundation (ASF) under one
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// or more contributor license agreements. See the NOTICE file
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// distributed with this work for additional information
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// regarding copyright ownership. The ASF licenses this file
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// to you under the Apache License, Version 2.0 (the
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// "License"); you may not use this file except in compliance
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// with the License. You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing,
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// software distributed under the License is distributed on an
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// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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// KIND, either express or implied. See the License for the
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// specific language governing permissions and limitations
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// under the License.
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#include <functional>
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#include <gtest/gtest.h>
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#include "gutil/std::unique_ptr.h"
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#include "gutil/ref_counted.h"
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#include "util/countdown_latch.h"
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#include "util/monotime.h"
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#include "util/test_macros.h"
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#include "util/thread.h"
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#include "util/threadpool.h"
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namespace doris {
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static void decrement_latch(CountDownLatch* latch, int amount) {
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if (amount == 1) {
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latch->count_down();
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return;
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}
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latch->count_down(amount);
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}
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// Tests that we can decrement the latch by arbitrary amounts, as well
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// as 1 by one.
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TEST(TestCountDownLatch, TestLatch) {
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std::unique_ptr<ThreadPool> pool;
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ASSERT_OK(ThreadPoolBuilder("cdl-test").set_max_threads(1).build(&pool));
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CountDownLatch latch(1000);
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// Decrement the count by 1 in another thread, this should not fire the
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// latch.
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ASSERT_OK(pool->submit_func(std::bind(decrement_latch, &latch, 1)));
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ASSERT_FALSE(latch.wait_for(MonoDelta::FromMilliseconds(200)));
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ASSERT_EQ(999, latch.count());
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// Now decrement by 1000 this should decrement to 0 and fire the latch
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// (even though 1000 is one more than the current count).
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ASSERT_OK(pool->submit_func(std::bind(decrement_latch, &latch, 1000)));
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latch.wait();
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ASSERT_EQ(0, latch.count());
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}
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// Test that resetting to zero while there are waiters lets the waiters
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// continue.
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TEST(TestCountDownLatch, TestResetToZero) {
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CountDownLatch cdl(100);
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scoped_refptr<Thread> t;
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ASSERT_OK(Thread::create("test", "cdl-test", &CountDownLatch::wait, &cdl, &t));
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// Sleep for a bit until it's likely the other thread is waiting on the latch.
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SleepFor(MonoDelta::FromMilliseconds(10));
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cdl.Reset(0);
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t->join();
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}
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} // namespace doris
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int main(int argc, char* argv[]) {
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::testing::InitGoogleTest(&argc, argv);
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return RUN_ALL_TESTS();
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}
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