object-introspection/include/oi/oi.h
2023-10-25 13:23:47 +01:00

68 lines
1.7 KiB
C++

/*
* Copyright (c) Meta Platforms, Inc. and affiliates.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef INCLUDED_OI_OI_H
#define INCLUDED_OI_OI_H 1
#include <oi/IntrospectionResult.h>
#include <oi/types/dy.h>
#include <cstdint>
#include <optional>
#include <stdexcept>
#include <vector>
namespace oi {
enum class Feature {
ChaseRawPointers,
CaptureThriftIsset,
GenJitDebug,
};
#ifdef OIL_AOT_COMPILATION
template <class T, Feature... Fs>
IntrospectionResult __attribute__((weak)) introspectImpl(const T& objectAddr);
template <typename T, Feature... Fs>
__attribute__((noinline)) IntrospectionResult introspect(const T& objectAddr) {
if (!introspectImpl<T, Fs...>)
throw std::logic_error(
"OIL is expecting AoT compilation but it doesn't appear to have run.");
return introspectImpl<T, Fs...>(objectAddr);
}
template <typename T, Feature... Fs>
std::optional<IntrospectionResult> tryIntrospect(const T& objectAddr) {
if (!introspectImpl<T, Fs...>)
return std::nullopt;
// This checks twice but is necessary for compile time as it currently
// depends on the presence of the strong symbol.
return introspect(objectAddr);
}
#endif
} // namespace oi
#ifndef OIL_AOT_COMPILATION
#include "oi/oi-jit.h"
#endif
#endif