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/* Copyright 2012 10gen Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* This program 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the GNU Affero General Public License in all respects
* for all of the code used other than as permitted herein. If you modify
* file(s) with this exception, you may extend this exception to your
* version of the file(s), but you are not obligated to do so. If you do not
* wish to do so, delete this exception statement from your version. If you
* delete this exception statement from all source files in the program,
* then also delete it in the license file.
*/
#include "mongo/platform/basic.h"
#include <iostream>
#include <boost/static_assert.hpp>
#include "mongo/platform/atomic_word.h"
#include "mongo/unittest/unittest.h"
namespace mongo {
namespace {
template <typename _AtomicWordType>
void testAtomicWordBasicOperations() {
typedef typename _AtomicWordType::WordType WordType;
_AtomicWordType w;
ASSERT_EQUALS(WordType(0), w.load());
w.store(1);
ASSERT_EQUALS(WordType(1), w.load());
ASSERT_EQUALS(WordType(1), w.swap(2));
ASSERT_EQUALS(WordType(2), w.load());
ASSERT_EQUALS(WordType(2), w.compareAndSwap(0, 1));
ASSERT_EQUALS(WordType(2), w.load());
ASSERT_EQUALS(WordType(2), w.compareAndSwap(2, 1));
ASSERT_EQUALS(WordType(1), w.load());
ASSERT_EQUALS(WordType(1), w.fetchAndAdd(14));
ASSERT_EQUALS(WordType(17), w.addAndFetch(2));
ASSERT_EQUALS(WordType(16), w.subtractAndFetch(1));
ASSERT_EQUALS(WordType(16), w.fetchAndSubtract(1));
ASSERT_EQUALS(WordType(15), w.compareAndSwap(15, 0));
ASSERT_EQUALS(WordType(0), w.load());
}
TEST(AtomicWordTests, BasicOperationsUnsigned32Bit) {
typedef AtomicUInt32::WordType WordType;
testAtomicWordBasicOperations<AtomicUInt32>();
AtomicUInt32 w(0xdeadbeef);
ASSERT_EQUALS(WordType(0xdeadbeef), w.compareAndSwap(0, 1));
ASSERT_EQUALS(WordType(0xdeadbeef), w.compareAndSwap(0xdeadbeef, 0xcafe1234));
ASSERT_EQUALS(WordType(0xcafe1234), w.fetchAndAdd(0xf000));
ASSERT_EQUALS(WordType(0xcaff0234), w.swap(0));
ASSERT_EQUALS(WordType(0), w.load());
}
TEST(AtomicWordTests, BasicOperationsUnsigned64Bit) {
typedef AtomicUInt64::WordType WordType;
testAtomicWordBasicOperations<AtomicUInt64>();
AtomicUInt64 w(0xdeadbeefcafe1234ULL);
ASSERT_EQUALS(WordType(0xdeadbeefcafe1234ULL), w.compareAndSwap(0, 1));
ASSERT_EQUALS(WordType(0xdeadbeefcafe1234ULL),
w.compareAndSwap(0xdeadbeefcafe1234ULL, 0xfedcba9876543210ULL));
ASSERT_EQUALS(WordType(0xfedcba9876543210ULL), w.fetchAndAdd(0xf0000000ULL));
ASSERT_EQUALS(WordType(0xfedcba9966543210ULL), w.swap(0));
ASSERT_EQUALS(WordType(0), w.load());
}
TEST(AtomicWordTests, BasicOperationsSigned32Bit) {
typedef AtomicInt32::WordType WordType;
testAtomicWordBasicOperations<AtomicInt32>();
AtomicInt32 w(0xdeadbeef);
ASSERT_EQUALS(WordType(0xdeadbeef), w.compareAndSwap(0, 1));
ASSERT_EQUALS(WordType(0xdeadbeef), w.compareAndSwap(0xdeadbeef, 0xcafe1234));
ASSERT_EQUALS(WordType(0xcafe1234), w.fetchAndAdd(0xf000));
ASSERT_EQUALS(WordType(0xcaff0234), w.swap(0));
ASSERT_EQUALS(WordType(0), w.load());
}
TEST(AtomicWordTests, BasicOperationsSigned64Bit) {
typedef AtomicInt64::WordType WordType;
testAtomicWordBasicOperations<AtomicInt64>();
AtomicInt64 w(0xdeadbeefcafe1234ULL);
ASSERT_EQUALS(WordType(0xdeadbeefcafe1234LL), w.compareAndSwap(0, 1));
ASSERT_EQUALS(WordType(0xdeadbeefcafe1234LL),
w.compareAndSwap(0xdeadbeefcafe1234LL, 0xfedcba9876543210LL));
ASSERT_EQUALS(WordType(0xfedcba9876543210LL), w.fetchAndAdd(0xf0000000LL));
ASSERT_EQUALS(WordType(0xfedcba9966543210LL), w.swap(0));
ASSERT_EQUALS(WordType(0), w.load());
}
} // namespace
} // namespace mongo
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