/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ /*************************************************************************** * atomic.cc * * Wed Mar 23 09:17:12 CET 2016 * Copyright 2016 Christian Gl�ckner * cgloeckner@freenet.de ****************************************************************************/ /* * This file is part of DrumGizmo. * * DrumGizmo is free software; you can redistribute it and/or modify * it under the terms of the GNU Lesser General Public License as published by * the Free Software Foundation; either version 3 of the License, or * (at your option) any later version. * * DrumGizmo is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public License * along with DrumGizmo; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. */ #include "dgunit.h" #include <atomic.h> class AtomicTest : public DGUnit { public: AtomicTest() { DGUNIT_TEST(AtomicTest::podAtomicsUseStandardImpl); DGUNIT_TEST(AtomicTest::nonPodAtomicsUseOwnImpl); DGUNIT_TEST(AtomicTest::podAtomicCanBeDefaultInitialized); DGUNIT_TEST(AtomicTest::nonPodAtomicCanBeDefaultInitialized); DGUNIT_TEST(AtomicTest::podAtomicCanBeValueInitialized); DGUNIT_TEST(AtomicTest::nonPodAtomicCanBeValueInitialized); DGUNIT_TEST(AtomicTest::podAtomicCanBeValueAssigned); DGUNIT_TEST(AtomicTest::nonPodAtomicCanBeValueAssigned); DGUNIT_TEST(AtomicTest::podAtomicsAreLockFree); } void podAtomicsUseStandardImpl() { DGUNIT_ASSERT(isUsingStandardImpl<bool>()); DGUNIT_ASSERT(isUsingStandardImpl<unsigned short int>()); DGUNIT_ASSERT(isUsingStandardImpl<short int>()); DGUNIT_ASSERT(isUsingStandardImpl<unsigned int>()); DGUNIT_ASSERT(isUsingStandardImpl<int>()); DGUNIT_ASSERT(isUsingStandardImpl<unsigned long int>()); DGUNIT_ASSERT(isUsingStandardImpl<long int>()); DGUNIT_ASSERT(isUsingStandardImpl<unsigned long long int>()); DGUNIT_ASSERT(isUsingStandardImpl<long long int>()); DGUNIT_ASSERT(isUsingStandardImpl<float>()); DGUNIT_ASSERT(isUsingStandardImpl<double>()); DGUNIT_ASSERT(isUsingStandardImpl<long double>()); } void nonPodAtomicsUseOwnImpl() { DGUNIT_ASSERT(!isUsingStandardImpl<std::string>()); } void podAtomicCanBeDefaultInitialized() { Atomic<int> i; // note: i is initialized with garbage (void)i; // prevent compiler 'unused' warning } void nonPodAtomicCanBeDefaultInitialized() { Atomic<std::string> s; DGUNIT_ASSERT_EQUAL(s.load(), std::string{}); } void podAtomicCanBeValueInitialized() { Atomic<int> i{5}; DGUNIT_ASSERT_EQUAL(i.load(), 5); } void nonPodAtomicCanBeValueInitialized() { Atomic<std::string> s{"hello world"}; DGUNIT_ASSERT_EQUAL(s.load(), std::string{"hello world"}); } void podAtomicCanBeValueAssigned() { Atomic<int> i; i = 5; DGUNIT_ASSERT_EQUAL(i.load(), 5); } void nonPodAtomicCanBeValueAssigned() { Atomic<std::string> s; s = "hello world"; DGUNIT_ASSERT_EQUAL(s.load(), std::string{"hello world"}); } void podAtomicsAreLockFree() { DGUNIT_ASSERT(isLockFree<bool>()); DGUNIT_ASSERT(isLockFree<unsigned short int>()); DGUNIT_ASSERT(isLockFree<short int>()); DGUNIT_ASSERT(isLockFree<unsigned int>()); DGUNIT_ASSERT(isLockFree<int>()); DGUNIT_ASSERT(isLockFree<unsigned long int>()); DGUNIT_ASSERT(isLockFree<long int>()); DGUNIT_ASSERT(isLockFree<float>()); DGUNIT_ASSERT(isLockFree<std::size_t>()); // NOTE: Not lock free on small systems //DGUNIT_ASSERT(isLockFree<unsigned long long int>()); //DGUNIT_ASSERT(isLockFree<long long int>()); //DGUNIT_ASSERT(isLockFree<double>()); //DGUNIT_ASSERT(isLockFree<long double>()); } private: template <typename T> bool isUsingStandardImpl() { return std::is_base_of<std::atomic<T>, Atomic<T>>::value; } template <typename T> bool isLockFree() { Atomic<T> a; return a.is_lock_free(); } }; // Registers the fixture into the 'registry' static AtomicTest test;