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mdbx++: добавление cursor::clone() (backport).

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Леонид Юрьев (Leonid Yuriev) 2023-11-18 00:40:10 +03:00
parent 64a5ad8c04
commit 446dbc9d6c
1 changed files with 9 additions and 1 deletions
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10
mdbx.h++
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@ -4252,6 +4252,7 @@ public:
inline cursor &operator=(cursor &&other) noexcept;
inline cursor(cursor &&other) noexcept;
inline ~cursor() noexcept;
inline cursor_managed clone(void *your_context = nullptr) const;
MDBX_CXX14_CONSTEXPR operator bool() const noexcept;
MDBX_CXX14_CONSTEXPR operator const MDBX_cursor *() const;
MDBX_CXX14_CONSTEXPR operator MDBX_cursor *();
@ -4420,7 +4421,8 @@ class LIBMDBX_API_TYPE cursor_managed : public cursor {
public:
/// \brief Creates a new managed cursor with underlying object.
cursor_managed() : cursor_managed(::mdbx_cursor_create(nullptr)) {
cursor_managed(void *your_context = nullptr)
: cursor_managed(::mdbx_cursor_create(your_context)) {
if (MDBX_UNLIKELY(!handle_))
MDBX_CXX20_UNLIKELY error::throw_exception(MDBX_ENOMEM);
}
@ -6036,6 +6038,12 @@ inline ptrdiff_t txn::estimate_to_last(map_handle map,
MDBX_CXX11_CONSTEXPR cursor::cursor(MDBX_cursor *ptr) noexcept : handle_(ptr) {}
inline cursor_managed cursor::clone(void *your_context) const {
cursor_managed clone(your_context);
error::success_or_throw(::mdbx_cursor_copy(handle_, clone.handle_));
return clone;
}
inline cursor &cursor::operator=(cursor &&other) noexcept {
handle_ = other.handle_;
other.handle_ = nullptr;