v8/test/common/wasm/flag-utils.h

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// Copyright 2017 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_TEST_COMMON_FLAG_UTILS_H
#define V8_TEST_COMMON_FLAG_UTILS_H
#include "src/wasm/wasm-features.h"
namespace v8 {
namespace internal {
template <typename T>
class FlagScope {
public:
FlagScope(T* flag, T new_value) : flag_(flag), previous_value_(*flag) {
*flag = new_value;
}
~FlagScope() { *flag_ = previous_value_; }
private:
T* flag_;
T previous_value_;
};
#define FLAG_SCOPE(flag) \
FlagScope<bool> __scope_##flag##__LINE__(&FLAG_##flag, true)
#define EXPERIMENTAL_FLAG_SCOPE(flag) FLAG_SCOPE(experimental_wasm_##flag)
namespace wasm {
class WasmFeatureScope {
public:
explicit WasmFeatureScope(WasmFeatures* features, WasmFeature feature,
bool val = true)
: prev_(features->contains(feature)),
feature_(feature),
features_(features) {
set(val);
}
~WasmFeatureScope() { set(prev_); }
private:
void set(bool val) {
if (val) {
features_->Add(feature_);
} else {
features_->Remove(feature_);
}
}
bool const prev_;
WasmFeature const feature_;
WasmFeatures* const features_;
};
#define WASM_FEATURE_SCOPE(feat) \
WasmFeatureScope feat##_scope(&this->enabled_features_, kFeature_##feat)
#define WASM_FEATURE_SCOPE_VAL(feat, val) \
WasmFeatureScope feat##_scope(&this->enabled_features_, kFeature_##feat, val)
} // namespace wasm
} // namespace internal
} // namespace v8
#endif // V8_TEST_COMMON_FLAG_UTILS_H