7ef1bab914
Added some more fuzz and sleeping to the test calculation to have a actual chance to fail when something is not well locked. Using a premature classlock, locking instances was insufficient.
126 lines
3.5 KiB
C++
126 lines
3.5 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 the
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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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#include "lib/test/run.hpp"
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#include "lib/symbol.hpp"
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#include "backend/thread-wrapper.hpp"
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#include "lib/sync.hpp"
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#include <tr1/functional>
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using std::tr1::bind;
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using test::Test;
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using lib::Sync;
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using lib::NonrecursiveLock_NoWait;
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namespace backend {
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namespace test {
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namespace { // private test classes and data...
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volatile ulong sum;
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ulong checksum;
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Sync<NonrecursiveLock_NoWait> lockme;
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const uint NUM_THREADS = 20;
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const uint MAX_RAND_SUMMAND = 100;
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uint
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createVal() ///< generating test values, remembering the sum
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{
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uint val(rand() % MAX_RAND_SUMMAND);
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checksum += val;
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return val;
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}
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struct TestThread
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: Sync<NonrecursiveLock_NoWait> // using dedicated locking for this test TODO: needs classlock
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, Thread
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{
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TestThread()
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: Thread("test Thread creation",
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bind (&TestThread::theOperation, this, createVal(), createVal()))
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{ } // note the binding (functor object) is passed as anonymous temporary
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void
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theOperation (uint a, uint b) ///< the actual operation running in a separate thread
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{
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//Lock(this); << broken we need a classlock, using sync-classlock is left as excercise for the reader
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Sync<NonrecursiveLock_NoWait>::Lock gotit(&lockme);
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sum *= 2;
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usleep (200); // force preemption
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sum += (2*(a+b));
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usleep (200);
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sum /= 2;
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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 backend 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 backend::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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sum = checksum = 0;
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TestThread instances[NUM_THREADS] SIDEEFFECT;
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usleep (200000); // pause 200ms for the threads to terminate.....
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ASSERT (0 < sum);
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ASSERT (sum==checksum);
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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 test
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} // namespace backend
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