Ichthyostega
0b9e184fa3
* most usages are drop-in replacements * occasionally the other convenience functions can be used * verify call-paths from core code to identify usages * ensure reseeding for all tests involving some kind of randomness... __Note__: some tests were not yet converted, since their usage of randomness is actually not thread-safe. This problem existed previously, since also `rand()` is not thread safe, albeit in most cases it is possible to ignore this problem, as ''garbled internal state'' is also somehow „random“
153 lines
4.2 KiB
C++
153 lines
4.2 KiB
C++
/*
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ThreadWrapperJoin(Test) - wait blocking on termination of a thread
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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-join-test.cpp
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** unit test \ref ThreadWrapperJoin_test
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*/
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#include "lib/test/run.hpp"
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#include "lib/test/test-helper.hpp"
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#include "lib/thread.hpp"
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#include "lib/error.hpp"
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#include <chrono>
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using test::Test;
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using std::this_thread::sleep_for;
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using namespace std::chrono_literals;
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namespace lib {
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namespace test {
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using error::LUMIERA_ERROR_LOGIC;
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namespace {
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const int DESTRUCTION_CODE = -23;
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LUMIERA_ERROR_DEFINE(SPECIAL, "007 exception");
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#define Type(_EXPR_) lib::test::showType<decltype(_EXPR_)>()
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}
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/***********************************************************************//**
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* @test verify the special flavour of the thread-wrapper, allowing to block
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* waiting on thread end and then pass result or error state.
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* @see thread.hpp
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* @see Result_test
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* @see ThreadWrapper_test
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* @see SyncLocking_test
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*/
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class ThreadWrapperJoin_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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seedRand();
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simpleUse();
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returnValue();
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detectFailure();
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joinOnceOnly();
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}
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void
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simpleUse()
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{
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ThreadJoinable theThread{"test join-1"
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,[]{ sleep_for (10ms); }};
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CHECK (theThread);
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theThread.join(); // blocks until thread-function has terminated
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CHECK (not theThread);
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}
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int
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theAction (int secretValue) ///< to be run in a new thread...
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{
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sleep_for (100ms); // pause 100ms prior to modifying
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if (DESTRUCTION_CODE == secretValue)
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throw error::External{"special agent detected"
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, LUMIERA_ERROR_SPECIAL};
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else
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return secretValue+42;
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}
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void
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returnValue()
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{
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int mySecret = rani(1000);
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ThreadJoinable theThread{"test join-2"
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,&ThreadWrapperJoin_test::theAction
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, this, mySecret};
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// Note: join() passes the result value captured in the thread
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CHECK (mySecret+42 == theThread.join());
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}
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void
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detectFailure()
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{
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ThreadJoinable theThread{"test join-3"
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,&ThreadWrapperJoin_test::theAction
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, this, DESTRUCTION_CODE};
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// join() actually returns a proxy...
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auto res = theThread.join();
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CHECK (Type(res) == "Result<int>"_expect);
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// can detect that the thread was aborted with an exception
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CHECK (not res.isValid());
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VERIFY_ERROR(SPECIAL, res.maybeThrow() );
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VERIFY_ERROR(SPECIAL, (int)res );
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}
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void
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joinOnceOnly ()
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{
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ThreadJoinable theThread{"joining-4"
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,[]{ sleep_for (10ms); }};
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theThread.join();
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VERIFY_ERROR(LOGIC, theThread.join() );
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VERIFY_ERROR(LOGIC, theThread.join() );
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}
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};
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/** Register this test class... */
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LAUNCHER (ThreadWrapperJoin_test, "function common");
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}} // namespace lib::test
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