52 lines
1.4 KiB
C++
52 lines
1.4 KiB
C++
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// SPDX-License-Identifier: BSD-2-Clause
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// This code is part of the sfizz library and is licensed under a BSD 2-clause
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// license. You should have receive a LICENSE.md file along with the code.
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// If not, contact the sfizz maintainers at https://github.com/sfztools/sfizz
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#include "sfizz/utility/SpinMutex.h"
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#include "catch2/catch.hpp"
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#include <thread>
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#include <mutex>
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#include <condition_variable>
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TEST_CASE("[SpinMutex] Basic synchronization")
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{
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constexpr size_t num_threads = 8;
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constexpr size_t num_iterations = 1000000;
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volatile size_t counter = 0;
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SpinMutex counter_mutex;
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std::thread threads[num_threads];
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volatile bool ready = false;
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std::condition_variable ready_cv;
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std::mutex ready_mtx;
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auto thread_run = [&]()
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{
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std::unique_lock<std::mutex> lock(ready_mtx);
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ready_cv.wait(lock, [&]() -> bool { return ready; });
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lock.unlock();
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for (size_t i = 0; i < num_iterations; ++i) {
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std::unique_lock<SpinMutex> lock(counter_mutex);
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++counter;
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}
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};
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for (unsigned i = 0; i < num_threads; ++i)
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threads[i] = std::thread(thread_run);
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std::unique_lock<std::mutex> lock(ready_mtx);
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ready = true;
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ready_cv.notify_all();
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lock.unlock();
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for (unsigned i = 0; i < num_threads; ++i)
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threads[i].join();
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REQUIRE(counter == num_threads * num_iterations);
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}
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