thread.h revision 321369 
1//===-- llvm/Support/thread.h - Wrapper for <thread> ------------*- C++ -*-===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// This header is a wrapper for <thread> that works around problems with the
11// MSVC headers when exceptions are disabled. It also provides llvm::thread,
12// which is either a typedef of std::thread or a replacement that calls the
13// function synchronously depending on the value of LLVM_ENABLE_THREADS.
14//
15//===----------------------------------------------------------------------===//
16
17#ifndef LLVM_SUPPORT_THREAD_H
18#define LLVM_SUPPORT_THREAD_H
19
20#include "llvm/Config/llvm-config.h"
21
22#if LLVM_ENABLE_THREADS
23
24#include <thread>
25
26namespace llvm {
27typedef std::thread thread;
28}
29
30#else // !LLVM_ENABLE_THREADS
31
32#include <utility>
33
34namespace llvm {
35
36struct thread {
37  thread() {}
38  thread(thread &&other) {}
39  template <class Function, class... Args>
40  explicit thread(Function &&f, Args &&... args) {
41    f(std::forward<Args>(args)...);
42  }
43  thread(const thread &) = delete;
44
45  void join() {}
46  static unsigned hardware_concurrency() { return 1; };
47};
48
49}
50
51#endif // LLVM_ENABLE_THREADS
52
53#endif
54