| //===- llvm/Support/Atomic.h - Atomic Operations -----------------*- C++ -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This file declares the llvm::sys atomic operations. |
| // |
| // DO NOT USE IN NEW CODE! |
| // |
| // New code should always rely on the std::atomic facilities in C++11. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef LLVM_SUPPORT_ATOMIC_H |
| #define LLVM_SUPPORT_ATOMIC_H |
| |
| #include "llvm/Support/DataTypes.h" |
| |
| namespace llvm { |
| namespace sys { |
| void MemoryFence(); |
| |
| #ifdef _MSC_VER |
| typedef long cas_flag; |
| #else |
| typedef uint32_t cas_flag; |
| #endif |
| cas_flag CompareAndSwap(volatile cas_flag* ptr, |
| cas_flag new_value, |
| cas_flag old_value); |
| } |
| } |
| |
| #endif |
