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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 gc_TraceKind_h
#define gc_TraceKind_h
#include "js/TraceKind.h"
namespace js {
namespace gc {
// Map from all trace kinds to the base GC type.
template <JS::TraceKind kind>
struct MapTraceKindToType {};
#define DEFINE_TRACE_KIND_MAP(name, type, _, _1) \
template <> \
struct MapTraceKindToType<JS::TraceKind::name> { \
using Type = type; \
};
JS_FOR_EACH_TRACEKIND(DEFINE_TRACE_KIND_MAP);
#undef DEFINE_TRACE_KIND_MAP
// Map from a possibly-derived type to the base GC type.
template <typename T>
struct BaseGCType {
using type =
typename MapTraceKindToType<JS::MapTypeToTraceKind<T>::kind>::Type;
static_assert(std::is_base_of_v<type, T>, "Failed to find base type");
};
template <typename T>
struct TraceKindCanBeGray {};
#define EXPAND_TRACEKIND_DEF(_, type, canBeGray, _1) \
template <> \
struct TraceKindCanBeGray<type> { \
static constexpr bool value = canBeGray; \
};
JS_FOR_EACH_TRACEKIND(EXPAND_TRACEKIND_DEF)
#undef EXPAND_TRACEKIND_DEF
struct TraceKindCanBeGrayFunctor {
template <typename T>
bool operator()() {
return TraceKindCanBeGray<T>::value;
}
};
static inline bool TraceKindCanBeMarkedGray(JS::TraceKind kind) {
return DispatchTraceKindTyped(TraceKindCanBeGrayFunctor(), kind);
}
} /* namespace gc */
} /* namespace js */
#endif /* gc_TraceKind_h */
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