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45 lines
1.1 KiB
C
45 lines
1.1 KiB
C
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//===- llvm/System/Atomic.h - Atomic Operations -----------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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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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//===----------------------------------------------------------------------===//
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#include "llvm/Config/config.h"
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#ifdef __APPLE__
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#include <libkern/OSAtomic.h>
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#elif LLVM_ON_WIN32
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#include <windows.h>
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#endif
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#ifndef LLVM_SYSTEM_ATOMIC_H
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#define LLVM_SYSTEM_ATOMIC_H
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namespace llvm {
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namespace sys {
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inline void MemoryFence() {
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#if !defined(ENABLE_THREADS) || ENABLE_THREADS == 0
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return;
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#elif __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 1)
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__sync_synchronize();
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#elif defined(__APPLE__)
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OSMemoryBarrier();
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#elif defined(LLVM_ON_WIN32)
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#warning Memory fence implementation requires Windows 2003 or later.
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MemoryBarrier();
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#else
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#warning No memory fence implementation found for you platform!
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#endif
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}
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}
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}
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#endif
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