| //===-- llvm/Support/thread.h - Wrapper for <thread> ------------*- 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 |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This header is a wrapper for <thread> that works around problems with the |
| // MSVC headers when exceptions are disabled. It also provides llvm::thread, |
| // which is either a typedef of std::thread or a replacement that calls the |
| // function synchronously depending on the value of LLVM_ENABLE_THREADS. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef LLVM_SUPPORT_THREAD_H |
| #define LLVM_SUPPORT_THREAD_H |
| |
| #include "llvm/Config/llvm-config.h" |
| |
| #if LLVM_ENABLE_THREADS |
| |
| #include <thread> |
| |
| namespace llvm { |
| typedef std::thread thread; |
| } |
| |
| #else // !LLVM_ENABLE_THREADS |
| |
| #include <utility> |
| |
| namespace llvm { |
| |
| struct thread { |
| thread() {} |
| thread(thread &&other) {} |
| template <class Function, class... Args> |
| explicit thread(Function &&f, Args &&... args) { |
| f(std::forward<Args>(args)...); |
| } |
| thread(const thread &) = delete; |
| |
| void join() {} |
| static unsigned hardware_concurrency() { return 1; }; |
| }; |
| |
| } |
| |
| #endif // LLVM_ENABLE_THREADS |
| |
| #endif |