| // 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 |