a69cc9f13d
Since Embree v3.13.0 supports AARCH64, switch back to the
official repo instead of using Embree-aarch64.
`thirdparty/embree/patches/godot-changes.patch` should now contain
an accurate diff of the changes done to the library.
(cherry picked from commit 767e374dce)
59 lines
1.3 KiB
C++
59 lines
1.3 KiB
C++
// Copyright 2009-2021 Intel Corporation
|
|
// SPDX-License-Identifier: Apache-2.0
|
|
|
|
#pragma once
|
|
|
|
#include <atomic>
|
|
#include "intrinsics.h"
|
|
|
|
namespace embree
|
|
{
|
|
/* compiler memory barriers */
|
|
#if defined(__INTEL_COMPILER)
|
|
//#define __memory_barrier() __memory_barrier()
|
|
#elif defined(__GNUC__) || defined(__clang__)
|
|
# define __memory_barrier() asm volatile("" ::: "memory")
|
|
#elif defined(_MSC_VER)
|
|
# define __memory_barrier() _ReadWriteBarrier()
|
|
#endif
|
|
|
|
template <typename T>
|
|
struct atomic : public std::atomic<T>
|
|
{
|
|
atomic () {}
|
|
|
|
atomic (const T& a)
|
|
: std::atomic<T>(a) {}
|
|
|
|
atomic (const atomic<T>& a) {
|
|
this->store(a.load());
|
|
}
|
|
|
|
atomic& operator=(const atomic<T>& other) {
|
|
this->store(other.load());
|
|
return *this;
|
|
}
|
|
};
|
|
|
|
template<typename T>
|
|
__forceinline void atomic_min(std::atomic<T>& aref, const T& bref)
|
|
{
|
|
const T b = bref.load();
|
|
while (true) {
|
|
T a = aref.load();
|
|
if (a <= b) break;
|
|
if (aref.compare_exchange_strong(a,b)) break;
|
|
}
|
|
}
|
|
|
|
template<typename T>
|
|
__forceinline void atomic_max(std::atomic<T>& aref, const T& bref)
|
|
{
|
|
const T b = bref.load();
|
|
while (true) {
|
|
T a = aref.load();
|
|
if (a >= b) break;
|
|
if (aref.compare_exchange_strong(a,b)) break;
|
|
}
|
|
}
|
|
}
|