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/* -*- 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 Glckner
* 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 <uunit.h>
#include <atomic.h>
class AtomicTest
: public uUnit
{
public:
AtomicTest()
{
uUNIT_TEST(AtomicTest::podAtomicsUseStandardImpl);
uUNIT_TEST(AtomicTest::nonPodAtomicsUseOwnImpl);
uUNIT_TEST(AtomicTest::podAtomicCanBeDefaultInitialized);
uUNIT_TEST(AtomicTest::nonPodAtomicCanBeDefaultInitialized);
uUNIT_TEST(AtomicTest::podAtomicCanBeValueInitialized);
uUNIT_TEST(AtomicTest::nonPodAtomicCanBeValueInitialized);
uUNIT_TEST(AtomicTest::podAtomicCanBeValueAssigned);
uUNIT_TEST(AtomicTest::nonPodAtomicCanBeValueAssigned);
}
void podAtomicsUseStandardImpl()
{
uUNIT_ASSERT(isUsingStandardImpl<bool>());
uUNIT_ASSERT(isUsingStandardImpl<unsigned short int>());
uUNIT_ASSERT(isUsingStandardImpl<short int>());
uUNIT_ASSERT(isUsingStandardImpl<unsigned int>());
uUNIT_ASSERT(isUsingStandardImpl<int>());
uUNIT_ASSERT(isUsingStandardImpl<unsigned long int>());
uUNIT_ASSERT(isUsingStandardImpl<long int>());
uUNIT_ASSERT(isUsingStandardImpl<unsigned long long int>());
uUNIT_ASSERT(isUsingStandardImpl<long long int>());
uUNIT_ASSERT(isUsingStandardImpl<float>());
uUNIT_ASSERT(isUsingStandardImpl<double>());
uUNIT_ASSERT(isUsingStandardImpl<long double>());
}
void nonPodAtomicsUseOwnImpl()
{
uUNIT_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;
uUNIT_ASSERT_EQUAL(s.load(), std::string{});
}
void podAtomicCanBeValueInitialized()
{
Atomic<int> i{5};
uUNIT_ASSERT_EQUAL(i.load(), 5);
}
void nonPodAtomicCanBeValueInitialized()
{
Atomic<std::string> s{"hello world"};
uUNIT_ASSERT_EQUAL(s.load(), std::string{"hello world"});
}
void podAtomicCanBeValueAssigned()
{
Atomic<int> i;
i = 5;
uUNIT_ASSERT_EQUAL(i.load(), 5);
}
void nonPodAtomicCanBeValueAssigned()
{
Atomic<std::string> s;
s = "hello world";
uUNIT_ASSERT_EQUAL(s.load(), std::string{"hello world"});
}
void podAtomicsAreLockFree()
{
uUNIT_ASSERT(isLockFree<bool>());
uUNIT_ASSERT(isLockFree<unsigned short int>());
uUNIT_ASSERT(isLockFree<short int>());
uUNIT_ASSERT(isLockFree<unsigned int>());
uUNIT_ASSERT(isLockFree<int>());
uUNIT_ASSERT(isLockFree<unsigned long int>());
uUNIT_ASSERT(isLockFree<long int>());
uUNIT_ASSERT(isLockFree<float>());
uUNIT_ASSERT(isLockFree<std::size_t>());
// NOTE: Not lock free on small systems
//uUNIT_ASSERT(isLockFree<unsigned long long int>());
//uUNIT_ASSERT(isLockFree<long long int>());
//uUNIT_ASSERT(isLockFree<double>());
//uUNIT_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;
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