| // Copyright 2017 The Crashpad Authors. All rights reserved. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| #ifndef CRASHPAD_UTIL_STDLIB_THREAD_SAFE_VECTOR_H_ |
| #define CRASHPAD_UTIL_STDLIB_THREAD_SAFE_VECTOR_H_ |
| |
| #include <utility> |
| #include <vector> |
| |
| #include "base/macros.h" |
| #include "base/synchronization/lock.h" |
| |
| namespace crashpad { |
| |
| //! \brief A wrapper for a `std::vector<>` that can be accessed safely from |
| //! multiple threads. |
| //! |
| //! This is not a drop-in replacement for `std::vector<>`. Only necessary |
| //! operations are defined. |
| template <typename T> |
| class ThreadSafeVector { |
| public: |
| ThreadSafeVector() : vector_(), lock_() {} |
| ~ThreadSafeVector() {} |
| |
| //! \brief Wraps `std::vector<>::%push_back()`. |
| void PushBack(const T& element) { |
| base::AutoLock lock_owner(lock_); |
| vector_.push_back(element); |
| } |
| |
| //! \brief Atomically clears the underlying vector and returns its previous |
| //! contents. |
| std::vector<T> Drain() { |
| std::vector<T> contents; |
| { |
| base::AutoLock lock_owner(lock_); |
| std::swap(vector_, contents); |
| } |
| return contents; |
| } |
| |
| private: |
| std::vector<T> vector_; |
| base::Lock lock_; |
| |
| DISALLOW_COPY_AND_ASSIGN(ThreadSafeVector); |
| }; |
| |
| } // namespace crashpad |
| |
| #endif // CRASHPAD_UTIL_STDLIB_THREAD_SAFE_VECTOR_H_ |