8008ce25e9
This patch adds some pthread and C++11 std::thread unit tests. Change-Id: I9706b542e5fa927a87c6e8ae2a6330fab7bb5d72 Reviewed-on: https://gem5-review.googlesource.com/8221 Reviewed-by: Jason Lowe-Power <jason@lowepower.com> Maintainer: Brandon Potter <Brandon.Potter@amd.com>
99 lines
3.1 KiB
C++
99 lines
3.1 KiB
C++
/*
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* Copyright (c) 2018, Cornell University
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials provided
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* with the distribution.
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*
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* Neither the name of Cornell University nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
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* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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* Authors: Moyang Wang
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*/
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#include <condition_variable>
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#include <iostream>
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#include <mutex>
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#include <thread>
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#include <vector>
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//------------------------------------------------------------------------
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// Test std::condition_variable
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//------------------------------------------------------------------------
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// The master thread creates N threads, each of which waits on a
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// condition variable of a signal to start. The master thread then set
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// the signal and notifies all other threads to begin.
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#define MAX_N_WORKER_THREADS 10
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std::mutex mtx;
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std::condition_variable cv;
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bool ready = false;
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void print_id( size_t id )
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{
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std::unique_lock<std::mutex> lck(mtx);
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while (!ready)
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cv.wait(lck);
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// ...
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std::cout << "thread " << id << '\n';
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}
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void go()
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{
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std::unique_lock<std::mutex> lck(mtx);
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ready = true;
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cv.notify_all();
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}
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int main( int argc, char* argv[] )
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{
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size_t n_worker_threads = 0;
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std::vector< std::thread > threads;
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for ( size_t i = 0; i < MAX_N_WORKER_THREADS; i++ ) {
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try {
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threads.push_back( std::thread( print_id, i ) );
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} catch ( const std::system_error& err ) {
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break;
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}
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n_worker_threads++;
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}
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std::cout << n_worker_threads << " threads ready to race...\n";
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go(); // go!
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for (int i = 0; i < n_worker_threads; ++i) {
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threads[i].join();
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}
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// if there is no timeout (i.e., threads are all waken up properly, this
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// test always succeeds)
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return EXIT_SUCCESS;
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}
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