156 lines
4.1 KiB
C++
156 lines
4.1 KiB
C++
/*
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ThreadWrapper(Test) - starting threads and passing context
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Copyright (C) Lumiera.org
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2008, Hermann Vosseler <Ichthyostega@web.de>
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2 of
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the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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* *****************************************************/
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/** @file thread-wrapper-test.cpp
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** unit test \ref ThreadWrapper_test
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*/
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#include "lib/test/run.hpp"
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#include "lib/test/test-helper.hpp"///////////TODO
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#include "lib/thread.hpp"
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#include "lib/iter-explorer.hpp"
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#include "lib/scoped-collection.hpp"
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#include <atomic>
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#include <chrono>
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using test::Test;
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using lib::explore;
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using std::atomic_uint;
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using std::this_thread::yield;
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using std::this_thread::sleep_for;
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using std::chrono::microseconds;
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namespace lib {
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namespace test {
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namespace { // private test classes and data...
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const uint NUM_THREADS = 200;
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struct TestThread
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: Thread
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{
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using Thread::Thread;
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uint local{0};
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void
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doIt (uint a, uint b) ///< the actual operation running in a separate thread
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{
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uint sum = a + b;
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sleep_for (microseconds{sum});
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local = sum;
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}
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};
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} // (End) test classes and data....
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/**********************************************************************//**
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* @test use the Lumiera Vault to create some new threads, utilising the
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* lumiera::Thread wrapper for binding to an arbitrary operation
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* and passing the appropriate context.
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*
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* @see vault::Thread
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* @see threads.h
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*/
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class ThreadWrapper_test : public Test
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{
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virtual void
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run (Arg)
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{
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demonstrateSimpleUsage();
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verifyConcurrentExecution();
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}
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/**
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* @test demonstrate simple usage of the thread-wrapper
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*/
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void
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demonstrateSimpleUsage()
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{
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lib::ScopedCollection<Thread> threads{NUM_THREADS};
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atomic_uint invocations{0};
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for (uint i=0; i<NUM_THREADS; ++i)
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threads.emplace<Thread> ("counter"
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,[&]{ ++invocations; });
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while (explore(threads).has_any())
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yield();
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CHECK (invocations == NUM_THREADS);
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}
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/**
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* @test verify the thread function is actually performed concurrently
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*/
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void
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verifyConcurrentExecution()
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{
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lib::ScopedCollection<TestThread> threads{NUM_THREADS};
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size_t globalSum = 0;
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for (uint i=1; i<=NUM_THREADS; ++i)
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{
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uint x = rand() % 1000;
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globalSum += (i + x);
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threads.emplace<TestThread> (&TestThread::doIt, uint{i}, uint{x});
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}
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while (explore(threads).has_any())
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yield();
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size_t checkSum = 0;
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for (auto& t : threads)
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{
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CHECK (not t);
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CHECK (0 < t.local);
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checkSum += t.local;
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}
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CHECK (checkSum == globalSum);
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}
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};
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/** Register this test class... */
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LAUNCHER (ThreadWrapper_test, "function common");
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}} // namespace lib::test
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