diff options
Diffstat (limited to 'include/openvic-dataloader/detail')
| -rw-r--r-- | include/openvic-dataloader/detail/PointerHash.hpp | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/include/openvic-dataloader/detail/PointerHash.hpp b/include/openvic-dataloader/detail/PointerHash.hpp new file mode 100644 index 0000000..c0d28bc --- /dev/null +++ b/include/openvic-dataloader/detail/PointerHash.hpp @@ -0,0 +1,23 @@ +#pragma once + +#include <cstdint> + +namespace ovdl::detail { + /* hash any pointer */ + template<typename T> + struct PointerHash { + using type = T; + using ptr_type = T*; + using const_type = const T; + using const_ptr_type = const T*; + using const_ptr_const_type = const const_ptr_type; + constexpr std::size_t operator()(const_ptr_const_type pointer) const { + auto addr = reinterpret_cast<uintptr_t>(pointer); +#if SIZE_MAX < UINTPTR_MAX + /* size_t is not large enough to hold the pointer’s memory address */ + addr %= SIZE_MAX; /* truncate the address so it is small enough to fit in a size_t */ +#endif + return addr; + } + }; +}
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