| // Copyright 2020 The Pigweed 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. |
| #pragma once |
| |
| #include "pw_thread_backend/id_native.h" |
| |
| namespace pw::thread { |
| |
| // The class thread::Id is a lightweight, trivially copyable class that serves |
| // as a unique identifier of Thread objects. |
| // |
| // Instances of this class may also hold the special distinct value that does |
| // not represent any thread. Once a thread has finished, the value of its |
| // thread::Id may be reused by another thread. |
| // |
| // This class is designed for use as key in associative containers, both |
| // ordered and unordered. |
| // |
| // The backend must ensure that: |
| // 1) There is a default construct which does not represent a thread. |
| // 2) Compare operators (==,!=,<,<=,>,>=) are provided to compare and sort IDs. |
| using Id = backend::NativeId; |
| |
| } // namespace pw::thread |
| |
| namespace pw::this_thread { |
| |
| // This is thread safe, not IRQ safe. It is implementation defined whether this |
| // is safe before the scheduler has started. |
| thread::Id get_id() noexcept; |
| |
| } // namespace pw::this_thread |
| |
| // The backend can opt to include an inline implementation. |
| #if __has_include("pw_thread_backend/id_inline.h") |
| #include "pw_thread_backend/id_inline.h" |
| #endif // __has_include("pw_thread_backend/id_inline.h") |
