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// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
// This source code is licensed under both the GPLv2 (found in the
// COPYING file in the root directory) and Apache 2.0 License
// (found in the LICENSE.Apache file in the root directory).
#include "port/port.h"
#include "port/stack_trace.h"
#include "rocksdb/slice.h"
#include "test_util/testharness.h"
#include "test_util/testutil.h"
namespace ROCKSDB_NAMESPACE {
// Use this to keep track of the cleanups that were actually performed
void Multiplier(void* arg1, void* arg2) {
int* res = reinterpret_cast<int*>(arg1);
int* num = reinterpret_cast<int*>(arg2);
*res *= *num;
}
class PinnableSliceTest : public testing::Test {
public:
void AssertSameData(const std::string& expected,
const PinnableSlice& slice) {
std::string got;
got.assign(slice.data(), slice.size());
ASSERT_EQ(expected, got);
}
};
// Test that the external buffer is moved instead of being copied.
TEST_F(PinnableSliceTest, MoveExternalBuffer) {
Slice s("123");
std::string buf;
PinnableSlice v1(&buf);
v1.PinSelf(s);
PinnableSlice v2(std::move(v1));
ASSERT_EQ(buf.data(), v2.data());
ASSERT_EQ(&buf, v2.GetSelf());
PinnableSlice v3;
v3 = std::move(v2);
ASSERT_EQ(buf.data(), v3.data());
ASSERT_EQ(&buf, v3.GetSelf());
}
TEST_F(PinnableSliceTest, Move) {
int n2 = 2;
int res = 1;
const std::string const_str1 = "123";
const std::string const_str2 = "ABC";
Slice slice1(const_str1);
Slice slice2(const_str2);
{
// Test move constructor on a pinned slice.
res = 1;
PinnableSlice v1;
v1.PinSlice(slice1, Multiplier, &res, &n2);
PinnableSlice v2(std::move(v1));
// Since v1's Cleanable has been moved to v2,
// no cleanup should happen in Reset.
v1.Reset();
ASSERT_EQ(1, res);
AssertSameData(const_str1, v2);
}
// v2 is cleaned up.
ASSERT_EQ(2, res);
{
// Test move constructor on an unpinned slice.
PinnableSlice v1;
v1.PinSelf(slice1);
PinnableSlice v2(std::move(v1));
AssertSameData(const_str1, v2);
}
{
// Test move assignment from a pinned slice to
// another pinned slice.
res = 1;
PinnableSlice v1;
v1.PinSlice(slice1, Multiplier, &res, &n2);
PinnableSlice v2;
v2.PinSlice(slice2, Multiplier, &res, &n2);
v2 = std::move(v1);
// v2's Cleanable will be Reset before moving
// anything from v1.
ASSERT_EQ(2, res);
// Since v1's Cleanable has been moved to v2,
// no cleanup should happen in Reset.
v1.Reset();
ASSERT_EQ(2, res);
AssertSameData(const_str1, v2);
}
// The Cleanable moved from v1 to v2 will be Reset.
ASSERT_EQ(4, res);
{
// Test move assignment from a pinned slice to
// an unpinned slice.
res = 1;
PinnableSlice v1;
v1.PinSlice(slice1, Multiplier, &res, &n2);
PinnableSlice v2;
v2.PinSelf(slice2);
v2 = std::move(v1);
// Since v1's Cleanable has been moved to v2,
// no cleanup should happen in Reset.
v1.Reset();
ASSERT_EQ(1, res);
AssertSameData(const_str1, v2);
}
// The Cleanable moved from v1 to v2 will be Reset.
ASSERT_EQ(2, res);
{
// Test move assignment from an upinned slice to
// another unpinned slice.
PinnableSlice v1;
v1.PinSelf(slice1);
PinnableSlice v2;
v2.PinSelf(slice2);
v2 = std::move(v1);
AssertSameData(const_str1, v2);
}
{
// Test move assignment from an upinned slice to
// a pinned slice.
res = 1;
PinnableSlice v1;
v1.PinSelf(slice1);
PinnableSlice v2;
v2.PinSlice(slice2, Multiplier, &res, &n2);
v2 = std::move(v1);
// v2's Cleanable will be Reset before moving
// anything from v1.
ASSERT_EQ(2, res);
AssertSameData(const_str1, v2);
}
// No Cleanable is moved from v1 to v2, so no more cleanup.
ASSERT_EQ(2, res);
}
} // namespace ROCKSDB_NAMESPACE
int main(int argc, char** argv) {
ROCKSDB_NAMESPACE::port::InstallStackTraceHandler();
::testing::InitGoogleTest(&argc, argv);
return RUN_ALL_TESTS();
}
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