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| //===- 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
|