You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
43 lines
1.1 KiB
43 lines
1.1 KiB
// David Eberly, Geometric Tools, Redmond WA 98052
|
|
// Copyright (c) 1998-2021
|
|
// Distributed under the Boost Software License, Version 1.0.
|
|
// https://www.boost.org/LICENSE_1_0.txt
|
|
// https://www.geometrictools.com/License/Boost/LICENSE_1_0.txt
|
|
// Version: 4.0.2019.08.13
|
|
|
|
#pragma once
|
|
|
|
#include <algorithm>
|
|
#include <atomic>
|
|
|
|
// Implementations of atomic minimum and atomic maximum computations. These
|
|
// are based on std::atomic_compare_exchange_strong.
|
|
|
|
namespace gte
|
|
{
|
|
template <typename T>
|
|
T AtomicMin(std::atomic<T>& v0, T const& v1)
|
|
{
|
|
T vInitial, vMin;
|
|
do
|
|
{
|
|
vInitial = v0;
|
|
vMin = std::min(vInitial, v1);
|
|
}
|
|
while (!std::atomic_compare_exchange_strong(&v0, &vInitial, vMin));
|
|
return vInitial;
|
|
}
|
|
|
|
template <typename T>
|
|
T AtomicMax(std::atomic<T>& v0, T const& v1)
|
|
{
|
|
T vInitial, vMax;
|
|
do
|
|
{
|
|
vInitial = v0;
|
|
vMax = std::max(vInitial, v1);
|
|
}
|
|
while (!std::atomic_compare_exchange_strong(&v0, &vInitial, vMax));
|
|
return vInitial;
|
|
}
|
|
}
|
|
|