llvm.org GIT mirror llvm / stable include / llvm / Support / Atomic.h
stable

Tree @stable (Download .tar.gz)

Atomic.h @stable

53ca1f3
c082324
6b54768
 
 
c082324
 
 
 
 
06da926
 
 
 
c082324
 
674be02
 
9693813
1f6efa3
c082324
75ebce9
 
 
 
 
c082324
 
3c1eaa0
b2e82d0
bcc2e45
 
 
6f2c64d
bcc2e45
6f2c64d
 
 
cd52a7a
 
c082324
b2e82d0
//===- 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