138 lines
3.9 KiB
C++
138 lines
3.9 KiB
C++
/*
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SyncTimedwait(Test) - check the monitor object based timed condition wait
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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/error.hpp"
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#include "lib/sync.hpp"
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#include <iostream>
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using std::cout;
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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 WAIT_mSec = 200; ///< milliseconds to wait before timeout
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} // (End) test classes and data....
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/********************************************************************************
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* @test timeout feature on condition wait as provided by pthread and accessible
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* via the object monitor based locking/waiting mechanism. Without creating
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* multiple threads, we engage into a blocking wait, which aborts due to
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* setting a timeout. (Note it is discouraged to use the timed wait feature;
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* when possible, you should prefer relying on the Lumiera scheduler)
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*
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* @see SyncWaiting_test
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* @see sync::Timeout
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* @see sync.hpp
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*/
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class SyncTimedwait_test
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: public Test,
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Sync<RecursiveLock_Waitable>
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{
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friend class Lock; // allows inheriting privately from Sync
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virtual void
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run (Arg)
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{
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checkTimeoutStruct();
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Lock block(this, &SyncTimedwait_test::neverHappens);
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cout << "back from LaLaLand, alive and thriving!\n";
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CHECK (block.isTimedWait());
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}
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bool
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neverHappens() ///< the "condition test" used for waiting....
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{
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Lock currentLock(this); // get the Lock recursively
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if (!currentLock.isTimedWait()) // right from within the condition test:
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currentLock.setTimeout(WAIT_mSec); // switch waiting mode to timed wait and set timeout
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return false;
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}
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void
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checkTimeoutStruct()
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{
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sync::Timeout tout;
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CHECK (!tout);
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CHECK (0 == tout.tv_sec);
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CHECK (0 == tout.tv_nsec);
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tout.setOffset (0);
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CHECK (!tout);
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CHECK (0 == tout.tv_sec);
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CHECK (0 == tout.tv_nsec);
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timespec ref;
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clock_gettime(CLOCK_REALTIME, &ref);
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tout.setOffset (1);
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CHECK (tout);
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CHECK (0 < tout.tv_sec);
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CHECK (ref.tv_sec <= tout.tv_sec);
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CHECK (ref.tv_nsec <= 1000000 + tout.tv_nsec || ref.tv_nsec > 1000000000-100000);
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clock_gettime(CLOCK_REALTIME, &ref);
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tout.setOffset (1000);
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CHECK (tout);
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if (ref.tv_nsec!=0) // should have gotten an overflow to the seconds part
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{
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CHECK (ref.tv_sec <= 2 + tout.tv_sec );
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CHECK ((ref.tv_nsec + 1000000 * 999) % 1000000000
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<= tout.tv_nsec);
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}
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}
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};
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/** Register this test class... */
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LAUNCHER (SyncTimedwait_test, "unit common");
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}} // namespace lib::test
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