Atomics.h

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// Jolt Physics Library (https://github.com/jrouwe/JoltPhysics)
// SPDX-FileCopyrightText: 2021 Jorrit Rouwe
// SPDX-License-Identifier: MIT
 
#pragma once
 
JPH_SUPPRESS_WARNINGS_STD_BEGIN
#include <atomic>
JPH_SUPPRESS_WARNINGS_STD_END
 
JPH_NAMESPACE_BEGIN
 
// Things we're using from STL
using std::atomic;
using std::memory_order;
using std::memory_order_relaxed;
using std::memory_order_acquire;
using std::memory_order_release;
using std::memory_order_acq_rel;
using std::memory_order_seq_cst;
 
template <class T>
bool AtomicMin(atomic<T> &ioAtomic, const T inValue, const memory_order inMemoryOrder = memory_order_seq_cst)
{
    T cur_value = ioAtomic.load(memory_order_relaxed);
    while (cur_value > inValue)
        if (ioAtomic.compare_exchange_weak(cur_value, inValue, inMemoryOrder))
            return true;
    return false;
}
 
template <class T>
bool AtomicMax(atomic<T> &ioAtomic, const T inValue, const memory_order inMemoryOrder = memory_order_seq_cst)
{
    T cur_value = ioAtomic.load(memory_order_relaxed);
    while (cur_value < inValue)
        if (ioAtomic.compare_exchange_weak(cur_value, inValue, inMemoryOrder))
            return true;
    return false;
}
 
JPH_NAMESPACE_END