LLVM
20.0.0git
include
llvm
Support
Atomic.h
Go to the documentation of this file.
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//===- 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
uint32_t
DataTypes.h
llvm::sys::cas_flag
uint32_t cas_flag
Definition:
Atomic.h:34
llvm::sys::MemoryFence
void MemoryFence()
Definition:
Atomic.cpp:30
llvm::sys::CompareAndSwap
cas_flag CompareAndSwap(volatile cas_flag *ptr, cas_flag new_value, cas_flag old_value)
Definition:
Atomic.cpp:44
llvm
This is an optimization pass for GlobalISel generic memory operations.
Definition:
AddressRanges.h:18
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