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9773c3dd6d
except for CompareAndSwap. That is the only one still being used anywhere now that statistics have been moved onto std::atomic. Also, add a warning to the header that we shouldn't introduce more uses of these old style atomics and instead should be using C++11's std::atomic facilities. Really hoping that we can hammer out the last couple of users here and replace them with something more localized and/or principled, but figured this was a pretty good start. =] Note that this patch will need to be reverted if r271504 needs to be reverted as that removes the last user of these. However, the biggest risk for that patch was MSVC 2013 and at least one bot has already passed where it would have failed there. I've tested MSVC 2015 using their web interfaces and other platforms seem fine, so I'm optimistic. Differential Revision: http://reviews.llvm.org/D20901 llvm-svn: 271540
39 lines
997 B
C++
39 lines
997 B
C++
//===- llvm/Support/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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// 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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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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