| // Copyright 2023 The Marl Authors. |
| // |
| // 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 |
| // |
| // https://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. |
| |
| // A wrapper around a thread_local variable, or a pthread key |
| |
| #ifndef marl_thread_local_h |
| #define marl_thread_local_h |
| |
| #ifdef MARL_USE_PTHREAD_THREAD_LOCAL |
| #include "debug.h" |
| |
| #include <pthread.h> |
| #include <type_traits> |
| |
| template <typename T> |
| class ThreadLocal { |
| static_assert(std::is_pointer<T>::value, |
| "The current implementation of ThreadLocal requires that T " |
| "must be a pointer"); |
| |
| public: |
| inline ThreadLocal(T v) { |
| pthread_key_create(&key, NULL); |
| pthread_setspecific(key, v); |
| } |
| inline ~ThreadLocal() { pthread_key_delete(key); } |
| inline operator T() const { return static_cast<T>(pthread_getspecific(key)); } |
| inline ThreadLocal& operator=(T v) { |
| pthread_setspecific(key, v); |
| return *this; |
| } |
| |
| private: |
| ThreadLocal(const ThreadLocal&) = delete; |
| ThreadLocal& operator=(const ThreadLocal&) = delete; |
| |
| pthread_key_t key; |
| }; |
| |
| #define MARL_DECLARE_THREAD_LOCAL(TYPE, NAME) static ThreadLocal<TYPE> NAME |
| #define MARL_INSTANTIATE_THREAD_LOCAL(TYPE, NAME, VALUE) \ |
| ThreadLocal<TYPE> NAME { \ |
| VALUE \ |
| } |
| |
| #else |
| |
| #define MARL_DECLARE_THREAD_LOCAL(TYPE, NAME) static thread_local TYPE NAME |
| #define MARL_INSTANTIATE_THREAD_LOCAL(TYPE, NAME, VALUE) \ |
| thread_local TYPE NAME { \ |
| VALUE \ |
| } |
| |
| #endif |
| |
| #endif // marl_thread_local_h |