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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* vim: set ts=8 sts=2 et sw=2 tw=80:
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef frontend_StencilXdr_h
#define frontend_StencilXdr_h
#include "frontend/ObjLiteral.h" // ObjLiteralStencil
#include "frontend/Stencil.h" // *Stencil
#include "vm/Scope.h" // Scope, ScopeKindString
#include "vm/Xdr.h" // XDRMode, XDRResult, XDREncoder
namespace js {
namespace frontend {
// Check that we can copy data to disk and restore it in another instance of
// the program in a different address space.
template <typename DataT>
struct CanCopyDataToDisk {
// Check that the object is fully packed, to save disk space.
#ifdef __cpp_lib_has_unique_object_representations
static constexpr bool unique_repr =
std::has_unique_object_representations<DataT>();
#else
static constexpr bool unique_repr = true;
#endif
// Approximation which assumes that 32bits variant of the class would not
// have pointers if the 64bits variant does not have pointer.
static constexpr bool no_pointer =
alignof(DataT) < alignof(void*) || sizeof(void*) == sizeof(uint32_t);
static constexpr bool value = unique_repr && no_pointer;
};
// This is just a namespace class that can be used in friend declarations,
// so that the statically declared XDR methods within have access to the
// relevant struct internals.
class StencilXDR {
public:
template <XDRMode mode>
static XDRResult ScopeData(XDRState<mode>* xdr, ScopeStencil& stencil,
BaseParserScopeData*& baseScopeData);
template <XDRMode mode, typename ScopeT>
static XDRResult ScopeSpecificData(XDRState<mode>* xdr,
BaseParserScopeData*& baseScopeData);
template <XDRMode mode>
static XDRResult ObjLiteral(XDRState<mode>* xdr, ObjLiteralStencil& stencil);
template <XDRMode mode>
static XDRResult BigInt(XDRState<mode>* xdr, BigIntStencil& stencil);
template <XDRMode mode>
static XDRResult SharedData(js::XDRState<mode>* xdr,
RefPtr<SharedImmutableScriptData>& sisd);
};
} /* namespace frontend */
} /* namespace js */
#endif /* frontend_StencilXdr_h */
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