include/llvm/Support/thread.h

//===-- 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