Ichthyostega
bfc4a60a09
...while the change in the thread-wrapper implementation was drop-in, this test in the existing from is questionable: it actually tests locking
147 lines
3.8 KiB
C++
147 lines
3.8 KiB
C++
/*
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SyncLocking(Test) - check the monitor object based locking
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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 sync-locking-test.cpp
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** unit test \ref SyncLocking_test
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*/
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#include "lib/test/run.hpp"
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#include "lib/thread.hpp"
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#include "lib/sync.hpp"
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#include "lib/symbol.hpp"
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#include <functional>
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using std::bind;
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using test::Test;
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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 = 20;
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const uint MAX_RAND_SUMMAND = 100;
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class Checker
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: public lib::Sync<>
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{
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volatile ulong hot_sum_;
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ulong control_sum_;
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public:
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Checker() : hot_sum_(0), control_sum_(0) { }
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bool
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verify() ///< verify test values got handled and accounted
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{
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return 0 < hot_sum_
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&& control_sum_ == hot_sum_;
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}
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uint
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createVal() ///< generating test values, remembering the control sum
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{
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uint val(rand() % MAX_RAND_SUMMAND);
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control_sum_ += val;
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return val;
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}
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void
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addValues (uint a, uint b) ///< to be called concurrently
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{
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Lock guard(this);
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hot_sum_ *= 2;
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usleep (200); // force preemption
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hot_sum_ += 2 * (a+b);
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usleep (200);
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hot_sum_ /= 2;
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}
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};
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Checker checksum; ///< global variable used by multiple threads
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struct TestThread
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: Thread
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{
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TestThread()
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: Thread{&TestThread::theOperation, checksum.createVal(), checksum.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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checksum.addValues (a,b);
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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 SyncLocking_test2 : 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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TestThread instances[NUM_THREADS] SIDEEFFECT;
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usleep (200000); // pause 200ms for the threads to terminate.....
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CHECK (checksum.verify());
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}
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};
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/** Register this test class... */
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LAUNCHER (SyncLocking_test2, "function common");
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}} // namespace lib::test
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