ISAR/libmdbx
3
0
Fork 0
mirror of https://github.com/isar/libmdbx.git synced 2025-01-02 00:14:14 +08:00
Code Issues Packages Projects Releases Wiki Activity

mdbx++: drop mdbx:offset_of и mdbx::owner_of.

Browse Source 
Change-Id: Idfd0b20677388a009d7a3e0bd29b5afb9f767b8f
This commit is contained in:
Leonid Yuriev 2020-09-26 01:41:46 +03:00
parent c424a80705
commit 989a7c992e
1 changed files with 0 additions and 28 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

28
mdbx.h++
View File

@ -178,34 +178,6 @@ using build_info = ::MDBX_build_info;
/// \brief Resutrns libmdbx build information.
MDBX_CXX11_CONSTEXPR const build_info &get_build() noexcept;
/// \brief Returns field offset in the container class.
template <class CONTAINER, class MEMBER>
static MDBX_CXX11_CONSTEXPR ptrdiff_t
offset_of(const MEMBER CONTAINER::*const member) {
return static_cast<const char *>(static_cast<const void *>(
&(static_cast<const CONTAINER *>(nullptr)->*member))) -
static_cast<const char *>(nullptr);
}
/// \brief Returns const pointer to container class instance
/// by const pointer to the member field.
template <class CONTAINER, class MEMBER>
static MDBX_CXX11_CONSTEXPR const CONTAINER *
owner_of(const MEMBER *ptr, const MEMBER CONTAINER::*member) {
return static_cast<const CONTAINER *>(static_cast<const void *>(
static_cast<const char *>(static_cast<const void *>(ptr)) -
offset_of(member)));
}
/// \brief Returns non-const pointer to container class instance
/// by non-const pointer to the member field.
template <class CONTAINER, class MEMBER>
static MDBX_CXX11_CONSTEXPR CONTAINER *
owner_of(MEMBER *ptr, const MEMBER CONTAINER::*member) {
return static_cast<CONTAINER *>(static_cast<void *>(
static_cast<char *>(static_cast<void *>(ptr)) - offset_of(member)));
}
/// \brief constexpr-compatible strlen().
static MDBX_CXX17_CONSTEXPR size_t strlen(const char *c_str) noexcept;