| //===-- ThreadSafeValue.h ---------------------------------------*- C++ -*-===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef LLDB_CORE_THREADSAFEVALUE_H |
| #define LLDB_CORE_THREADSAFEVALUE_H |
| |
| #include <mutex> |
| |
| #include "lldb/lldb-defines.h" |
| |
| namespace lldb_private { |
| |
| template <class T> class ThreadSafeValue { |
| public: |
| ThreadSafeValue() = default; |
| ThreadSafeValue(const T &value) : m_value(value) {} |
| |
| ~ThreadSafeValue() = default; |
| |
| T GetValue() const { |
| T value; |
| { |
| std::lock_guard<std::recursive_mutex> guard(m_mutex); |
| value = m_value; |
| } |
| return value; |
| } |
| |
| // Call this if you have already manually locked the mutex using the |
| // GetMutex() accessor |
| const T &GetValueNoLock() const { return m_value; } |
| |
| void SetValue(const T &value) { |
| std::lock_guard<std::recursive_mutex> guard(m_mutex); |
| m_value = value; |
| } |
| |
| // Call this if you have already manually locked the mutex using the |
| // GetMutex() accessor |
| // coverity[missing_lock] |
| void SetValueNoLock(const T &value) { m_value = value; } |
| |
| std::recursive_mutex &GetMutex() { return m_mutex; } |
| |
| private: |
| T m_value; |
| mutable std::recursive_mutex m_mutex; |
| |
| // For ThreadSafeValue only |
| ThreadSafeValue(const ThreadSafeValue &) = delete; |
| const ThreadSafeValue &operator=(const ThreadSafeValue &) = delete; |
| }; |
| |
| } // namespace lldb_private |
| #endif // LLDB_CORE_THREADSAFEVALUE_H |