//===- llvm/Support/Atomic.h - Atomic Operations -----------------*- 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 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" // Windows will at times define MemoryFence. #ifdef MemoryFence #undef MemoryFence #endif 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 |