luau/CodeGen/include/Luau/NativeProtoExecData.h

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// This file is part of the Luau programming language and is licensed under MIT License; see LICENSE.txt for details
#pragma once
#include <memory>
#include <stdint.h>
namespace Luau
{
namespace CodeGen
{
// The NativeProtoExecData is constant metadata associated with a NativeProto.
// We generally refer to the NativeProtoExecData via a pointer to the instruction
// offsets array because this makes the logic in the entry gate simpler.
class NativeModule;
struct NativeProtoExecDataHeader
{
// The NativeModule that owns this NativeProto. This is initialized
// when the NativeProto is bound to the NativeModule via assignToModule().
NativeModule* nativeModule = nullptr;
// The number of bytecode instructions in the proto. This is the number of
// elements in the instruction offsets array following this header.
uint32_t bytecodeInstructionCount = 0;
// The size of the native code for this NativeProto, in bytes.
size_t nativeCodeSize = 0;
};
// Make sure that the instruction offsets array following the header will be
// correctly aligned:
static_assert(sizeof(NativeProtoExecDataHeader) % sizeof(uint32_t) == 0);
struct NativeProtoExecDataDeleter
{
void operator()(const uint32_t* instructionOffsets) const noexcept;
};
using NativeProtoExecDataPtr = std::unique_ptr<uint32_t[], NativeProtoExecDataDeleter>;
[[nodiscard]] NativeProtoExecDataPtr createNativeProtoExecData(uint32_t bytecodeInstructionCount);
void destroyNativeProtoExecData(const uint32_t* instructionOffsets) noexcept;
[[nodiscard]] NativeProtoExecDataHeader& getNativeProtoExecDataHeader(uint32_t* instructionOffsets) noexcept;
[[nodiscard]] const NativeProtoExecDataHeader& getNativeProtoExecDataHeader(const uint32_t* instructionOffsets) noexcept;
} // namespace CodeGen
} // namespace Luau