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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/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 {
#define COMMA ,
#define SPACE
#define DECL_FIELD(feat, desc, val) bool feat = false;
#define JUST_TRUE(feat, desc, val) true
#define JUST_FALSE(feat, desc, val) false
#define DECL_PARAM(feat, desc, val) bool p##feat
#define DO_INIT(feat, desc, val) feat(p##feat)
// Enabled or detected features.
struct WasmFeatures {
FOREACH_WASM_FEATURE(DECL_FIELD, SPACE)
constexpr WasmFeatures() = default;
explicit constexpr WasmFeatures(FOREACH_WASM_FEATURE(DECL_PARAM, COMMA))
: FOREACH_WASM_FEATURE(DO_INIT, COMMA) {}
};
static constexpr WasmFeatures kAllWasmFeatures{
FOREACH_WASM_FEATURE(JUST_TRUE, COMMA)};
static constexpr WasmFeatures kNoWasmFeatures{
FOREACH_WASM_FEATURE(JUST_FALSE, COMMA)};
#undef JUST_TRUE
#undef JUST_FALSE
#undef DECL_FIELD
#undef DECL_PARAM
#undef DO_INIT
#undef COMMA
#undef SPACE
static constexpr WasmFeatures kAsmjsWasmFeatures = kNoWasmFeatures;
V8_EXPORT_PRIVATE WasmFeatures WasmFeaturesFromFlags();
// Enables features based on both commandline flags and the isolate.
// Precondition: A valid context must be set in {isolate->context()}.
V8_EXPORT_PRIVATE WasmFeatures WasmFeaturesFromIsolate(Isolate* isolate);
V8_EXPORT_PRIVATE void UnionFeaturesInto(WasmFeatures* dst,
const WasmFeatures& src);
} // namespace wasm
} // namespace internal
} // namespace v8
#endif // V8_WASM_WASM_FEATURES_H_
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