44 lines
1.1 KiB
C++
44 lines
1.1 KiB
C++
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// Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
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// SPDX-License-Identifier: Apache-2.0 OR ISC
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// This test attempts to setup a potential race condition that can cause the
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// first use of an rwlock to fail when initialized using
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// PTHREAD_RWLOCK_INITIALIZER.
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// See: https://sourceforge.net/p/mingw-w64/bugs/883/
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#include <openssl/rand.h>
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#include <cstdint>
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#include <iostream>
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#include <thread>
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#include <cassert>
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#include <cstdlib>
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static void thread_task_rand(bool *myFlag) {
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uint8_t buf[16];
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if(1 == RAND_bytes(buf, sizeof(buf))) {
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*myFlag = true;
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}
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}
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int main(int _argc, char** _argv) {
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constexpr size_t kNumThreads = 16;
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bool myFlags[kNumThreads] = {};
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std::thread myThreads[kNumThreads];
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for (size_t i = 0; i < kNumThreads; i++) {
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bool* myFlag = &myFlags[i];
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myThreads[i] = std::thread(thread_task_rand, myFlag);
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}
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for (size_t i = 0; i < kNumThreads; i++) {
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myThreads[i].join();
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if(!myFlags[i]) {
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std::cerr << "Thread " << i << " failed." << std::endl;
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exit(1);
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return 1;
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}
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}
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std::cout << "PASS" << std::endl;
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return 0;
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}
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