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ae65e281f3
to reflect the new license. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351636
43 lines
1.1 KiB
C++
43 lines
1.1 KiB
C++
//===- llvm/Support/Atomic.h - Atomic Operations -----------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file declares the llvm::sys atomic operations.
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//
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// DO NOT USE IN NEW CODE!
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//
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// New code should always rely on the std::atomic facilities in C++11.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_SUPPORT_ATOMIC_H
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#define LLVM_SUPPORT_ATOMIC_H
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#include "llvm/Support/DataTypes.h"
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// Windows will at times define MemoryFence.
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#ifdef MemoryFence
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#undef MemoryFence
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#endif
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namespace llvm {
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namespace sys {
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void MemoryFence();
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#ifdef _MSC_VER
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typedef long cas_flag;
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#else
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typedef uint32_t cas_flag;
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#endif
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cas_flag CompareAndSwap(volatile cas_flag* ptr,
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cas_flag new_value,
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cas_flag old_value);
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}
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}
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#endif
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