Revision 088b9844d41ecb4ecc4ee899459a1c6d6d25e859 authored by Yanqin Jin on 16 September 2022, 03:21:07 UTC, committed by Facebook GitHub Bot on 16 September 2022, 03:21:07 UTC
Summary: Hopefully, we can re-enable the combination of user-defined timestamp and subcompactions after https://github.com/facebook/rocksdb/issues/10658. Pull Request resolved: https://github.com/facebook/rocksdb/pull/10689 Test Plan: Make sure the following succeeds on devserver. make crash_test_with_ts Reviewed By: ltamasi Differential Revision: D39556558 Pulled By: riversand963 fbshipit-source-id: 4695f420b1bc9ebf3b24640b693746f4db82c149
1 parent c206aeb
cast_util.h
// 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).
#pragma once
#include <type_traits>
#include "rocksdb/rocksdb_namespace.h"
namespace ROCKSDB_NAMESPACE {
// The helper function to assert the move from dynamic_cast<> to
// static_cast<> is correct. This function is to deal with legacy code.
// It is not recommended to add new code to issue class casting. The preferred
// solution is to implement the functionality without a need of casting.
template <class DestClass, class SrcClass>
inline DestClass* static_cast_with_check(SrcClass* x) {
DestClass* ret = static_cast<DestClass*>(x);
#ifdef ROCKSDB_USE_RTTI
assert(ret == dynamic_cast<DestClass*>(x));
#endif
return ret;
}
// A wrapper around static_cast for lossless conversion between integral
// types, including enum types. For example, this can be used for converting
// between signed/unsigned or enum type and underlying type without fear of
// stripping away data, now or in the future.
template <typename To, typename From>
inline To lossless_cast(From x) {
using FromValue = typename std::remove_reference<From>::type;
static_assert(
std::is_integral<FromValue>::value || std::is_enum<FromValue>::value,
"Only works on integral types");
static_assert(std::is_integral<To>::value || std::is_enum<To>::value,
"Only works on integral types");
static_assert(sizeof(To) >= sizeof(FromValue), "Must be lossless");
return static_cast<To>(x);
}
} // namespace ROCKSDB_NAMESPACE
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