1//===-- llvm/Support/Threading.h - Control multithreading mode --*- 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 file declares helper functions for running LLVM in a multi-threaded
11// environment.
12//
13//===----------------------------------------------------------------------===//
14
15#ifndef LLVM_SUPPORT_THREADING_H
16#define LLVM_SUPPORT_THREADING_H
17
18namespace llvm {
19  /// Returns true if LLVM is compiled with support for multi-threading, and
20  /// false otherwise.
21  bool llvm_is_multithreaded();
22
23  /// llvm_execute_on_thread - Execute the given \p UserFn on a separate
24  /// thread, passing it the provided \p UserData.
25  ///
26  /// This function does not guarantee that the code will actually be executed
27  /// on a separate thread or honoring the requested stack size, but tries to do
28  /// so where system support is available.
29  ///
30  /// \param UserFn - The callback to execute.
31  /// \param UserData - An argument to pass to the callback function.
32  /// \param RequestedStackSize - If non-zero, a requested size (in bytes) for
33  /// the thread stack.
34  void llvm_execute_on_thread(void (*UserFn)(void*), void *UserData,
35                              unsigned RequestedStackSize = 0);
36}
37
38#endif
39