v8/test/common/flag-utils.h

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// Copyright 2020 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
namespace v8 {
namespace internal {
template <typename T>
class V8_NODISCARD 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)
} // namespace internal
} // namespace v8
#define FLAG_SCOPE_EXTERNAL(flag) \
v8::internal::FlagScope<bool> __scope_##flag##__LINE__( \
&v8::internal::FLAG_##flag, true)
#define UNFLAG_SCOPE_EXTERNAL(flag) \
v8::internal::FlagScope<bool> __scope_##flag##__LINE__( \
&v8::internal::FLAG_##flag, false)
#endif // V8_TEST_COMMON_FLAG_UTILS_H