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5bc818419a
Currently `ForeignOwnable::from_foreign()` only works for non-null pointers for the existing `impl`s (e.g. `Box`, `Arc`). In turn, this means callers may write code like: ```rust // `p` is a pointer that may be null. if p.is_null() { None } else { unsafe { Some(Self::from_foreign(ptr)) } } ``` Add a `try_from_foreign()` method to the trait with a default implementation that returns `None` if `ptr` is null, otherwise `Some(from_foreign(ptr))`, so that it can be used by callers instead. Link: https://github.com/Rust-for-Linux/linux/issues/1057 Signed-off-by: Obei Sideg <linux@obei.io> Reviewed-by: Alice Ryhl <aliceryhl@google.com> Reviewed-by: Trevor Gross <tmgross@umich.edu> Link: https://lore.kernel.org/r/0100018d53f737f8-80c1fe97-0019-40d7-ab69-b1b192785cd7-000000@email.amazonses.com [ Fixed intra-doc links, improved `SAFETY` comment and reworded commit. ] Signed-off-by: Miguel Ojeda <ojeda@kernel.org> |
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init | ||
net | ||
sync | ||
allocator.rs | ||
build_assert.rs | ||
error.rs | ||
init.rs | ||
ioctl.rs | ||
kunit.rs | ||
lib.rs | ||
net.rs | ||
prelude.rs | ||
print.rs | ||
static_assert.rs | ||
std_vendor.rs | ||
str.rs | ||
sync.rs | ||
task.rs | ||
time.rs | ||
types.rs | ||
workqueue.rs |