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@@ -1,42 +1,48 @@
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#include <assert.h>
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#include <atomic>
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#include <thread>
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#include <assert.h>
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std::atomic<int> data[5];
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std::atomic<bool> sync1(false),sync2(false);
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std::atomic<bool> sync1(false), sync2(false);
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void thread_1()
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void
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thread_1()
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{
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data[0].store(42,std::memory_order_relaxed);
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data[1].store(97,std::memory_order_relaxed);
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data[2].store(17,std::memory_order_relaxed);
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data[3].store(-141,std::memory_order_relaxed);
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data[4].store(2003,std::memory_order_relaxed);
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sync1.store(true,std::memory_order_release);
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data[0].store(42, std::memory_order_relaxed);
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data[1].store(97, std::memory_order_relaxed);
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data[2].store(17, std::memory_order_relaxed);
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data[3].store(-141, std::memory_order_relaxed);
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data[4].store(2003, std::memory_order_relaxed);
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sync1.store(true, std::memory_order_release);
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}
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void thread_2()
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void
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thread_2()
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{
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while(!sync1.load(std::memory_order_acquire));
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sync2.store(std::memory_order_release);
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while (!sync1.load(std::memory_order_acquire))
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;
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sync2.store(std::memory_order_release);
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}
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void thread_3()
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void
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thread_3()
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{
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while(!sync2.load(std::memory_order_acquire));
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assert(data[0].load(std::memory_order_relaxed)==42);
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assert(data[1].load(std::memory_order_relaxed)==97);
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assert(data[2].load(std::memory_order_relaxed)==17);
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assert(data[3].load(std::memory_order_relaxed)==-141);
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assert(data[4].load(std::memory_order_relaxed)==2003);
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while (!sync2.load(std::memory_order_acquire))
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;
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assert(data[0].load(std::memory_order_relaxed) == 42);
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assert(data[1].load(std::memory_order_relaxed) == 97);
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assert(data[2].load(std::memory_order_relaxed) == 17);
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assert(data[3].load(std::memory_order_relaxed) == -141);
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assert(data[4].load(std::memory_order_relaxed) == 2003);
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}
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int main()
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int
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main()
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{
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std::thread t1(thread_1);
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std::thread t2(thread_2);
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std::thread t3(thread_3);
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t1.join();
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t2.join();
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t3.join();
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std::thread t1(thread_1);
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std::thread t2(thread_2);
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std::thread t3(thread_3);
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t1.join();
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t2.join();
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t3.join();
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}
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