ISAR/libmdbx
3
0
Fork 0
mirror of https://github.com/isar/libmdbx.git synced 2024-12-30 02:14:12 +08:00
Code Issues Packages Projects Releases Wiki Activity

mdbx++: clarify comments for mdbx::byte and char8_t usage.

Browse Source 
Related to https://github.com/erthink/libmdbx/issues/263.
This commit is contained in:
Leonid Yuriev 2022-01-21 14:19:08 +03:00
parent 75b23524bd
commit 03381fa469
1 changed files with 7 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
mdbx.h++
View File

@ -251,11 +251,15 @@ namespace mdbx {
// Functions whose signature depends on the `mdbx::byte` type
// must be strictly defined as inline!
#if defined(DOXYGEN) || (defined(__cpp_char8_t) && __cpp_char8_t >= 201811)
// Wanna using a non-aliasing type to release more power of an optimizer.
// To enable all kinds of an compiler optimizations we use a byte-like type
// that don't presumes aliases for pointers as does the `char` type and its
// derivatives/typedefs.
// Please see https://github.com/erthink/libmdbx/issues/263
// for reasoning of the use of `char8_t` type and switching to `__restrict__`.
using byte = char8_t;
#else
// Wanna not using std::byte since it doesn't add features,
// but add inconvenient restrictions.
// Avoid `std::byte` since it doesn't add features but inconvenient
// restrictions.
using byte = unsigned char;
#endif /* __cpp_char8_t >= 201811*/