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https://github.com/GPUOpen-LibrariesAndSDKs/VulkanMemoryAllocator
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Make C++20 features optional
- Some compilers with C++20 dont have std::popcount - Support to toggle C++20 features from user side using new VMA_CPP20 macro. If the macro is not defined, it will be set using default logic - #if __cplusplus >= 202002L || _MSVC_LANG >= 202002L
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@ -2624,10 +2624,18 @@ VMA_CALL_PRE void VMA_CALL_POST vmaFreeStatsString(
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#include <utility>
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#include <utility>
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#include <type_traits>
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#include <type_traits>
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#if !defined(VMA_CPP20)
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#if __cplusplus >= 202002L || _MSVC_LANG >= 202002L // C++20
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#define VMA_CPP20 1
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#else
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#define VMA_CPP20 0
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#endif
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#endif
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#ifdef _MSC_VER
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#ifdef _MSC_VER
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#include <intrin.h> // For functions like __popcnt, _BitScanForward etc.
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#include <intrin.h> // For functions like __popcnt, _BitScanForward etc.
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#endif
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#endif
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#if __cplusplus >= 202002L || _MSVC_LANG >= 202002L // C++20
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#if VMA_CPP20
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#include <bit> // For std::popcount
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#include <bit> // For std::popcount
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#endif
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#endif
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@ -3263,7 +3271,7 @@ But you need to check in runtime whether user's CPU supports these, as some old
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*/
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*/
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static inline uint32_t VmaCountBitsSet(uint32_t v)
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static inline uint32_t VmaCountBitsSet(uint32_t v)
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{
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{
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#if __cplusplus >= 202002L || _MSVC_LANG >= 202002L // C++20
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#if VMA_CPP20
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return std::popcount(v);
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return std::popcount(v);
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#else
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#else
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uint32_t c = v - ((v >> 1) & 0x55555555);
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uint32_t c = v - ((v >> 1) & 0x55555555);
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