Ichthyostega
5f9683ef10
...after resolving the fundamental design problems, a policy mix-in can be defined now for a thread that deletes its own wrapper at the end of the thread-function. Such a setup would allow for »fire-and-forget« threads, but with wrapper and ensuring safe allocations. The prominent use case for such a setup would be the GUI-Thread.
112 lines
3.2 KiB
C++
112 lines
3.2 KiB
C++
/*
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ThreadWrapperAutonomous(Test) - launching a self-contained and completely detached thread
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Copyright (C) Lumiera.org
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2023, 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-autonomous-test.cpp
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** unit test \ref ThreadWrapperAutonomous_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 <atomic>
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#include <chrono>
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using test::Test;
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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 namespace std::chrono_literals;
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namespace lib {
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namespace test{
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namespace { // test parameters
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const uint NUM_THREADS = 200;
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const uint REPETITIONS = 10;
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}
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/*******************************************************************//**
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* @test a variation of the Thread wrapper to launch a detached thread,
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* with automatic memory management for the _thread-object._.
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* @see thread.hpp
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* @see ThreadWrapper_test
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*/
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class ThreadWrapperAutonomous_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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verifyMemoryManagement();
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}
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/** @test demonstrate simply launching a λ-function into background */
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void
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demonstrateSimpleUsage()
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{
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atomic_uint i{0};
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launchDetached ("anarchy", [&]{ ++i; });
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sleep_for(1ms);
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CHECK (i == 1); // verify the effect has taken place
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}
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/**
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* @test verify the detached thread autonomously manages its memory.
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*/
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void
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verifyMemoryManagement()
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{
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UNIMPLEMENTED ("verify thread manages itself");
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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}); // Note: explicit random delay before local store
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local = sum;
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}
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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 (ThreadWrapperAutonomous_test, "function common");
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}} // namespace lib::test
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