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// Copyright 2018 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef V8_WASM_WASM_FEATURES_H_
#define V8_WASM_WASM_FEATURES_H_
// The feature flags are declared in their own header.
#include "src/base/enum-set.h"
#include "src/base/macros.h"
#include "src/wasm/wasm-feature-flags.h"
// All features, including features that do not have flags.
#define FOREACH_WASM_FEATURE FOREACH_WASM_FEATURE_FLAG
namespace v8 {
namespace internal {
class Isolate;
namespace wasm {
enum WasmFeature {
#define DECL_FEATURE_ENUM(feat, ...) kFeature_##feat,
FOREACH_WASM_FEATURE(DECL_FEATURE_ENUM)
#undef DECL_FEATURE_ENUM
};
// Enabled or detected features.
class WasmFeatures : public base::EnumSet<WasmFeature> {
public:
constexpr WasmFeatures() = default;
explicit constexpr WasmFeatures(std::initializer_list<WasmFeature> features)
: EnumSet(features) {}
// Simplified getters. Use {has_foo()} instead of {contains(kFeature_foo)}.
#define DECL_FEATURE_GETTER(feat, ...) \
bool has_##feat() const { return contains(kFeature_##feat); }
FOREACH_WASM_FEATURE(DECL_FEATURE_GETTER)
#undef DECL_FEATURE_GETTER
static constexpr const char* name_for_feature(WasmFeature feature) {
switch (feature) {
#define NAME(feat, ...) \
case WasmFeature::kFeature_##feat: \
return #feat;
FOREACH_WASM_FEATURE(NAME)
}
#undef NAME
}
static inline constexpr WasmFeatures All();
static inline constexpr WasmFeatures None();
static inline constexpr WasmFeatures ForAsmjs();
static WasmFeatures FromFlags();
static V8_EXPORT_PRIVATE WasmFeatures FromIsolate(Isolate*);
};
// static
constexpr WasmFeatures WasmFeatures::All() {
#define LIST_FEATURE(feat, ...) kFeature_##feat,
return WasmFeatures({FOREACH_WASM_FEATURE(LIST_FEATURE)});
#undef LIST_FEATURE
}
// static
constexpr WasmFeatures WasmFeatures::None() { return {}; }
// static
constexpr WasmFeatures WasmFeatures::ForAsmjs() { return {}; }
} // namespace wasm
} // namespace internal
} // namespace v8
#endif // V8_WASM_WASM_FEATURES_H_
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