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| author | Benno Lossin <benno.lossin@proton.me> | 2023-04-08 12:26:22 +0000 |
|---|---|---|
| committer | Miguel Ojeda <ojeda@kernel.org> | 2023-04-12 18:41:05 +0200 |
| commit | 692e8935e23efab6c5d5fc4b003816b33c8082f7 (patch) | |
| tree | 18fe62f03bfdc6475f4e0ab63eb952cc4d98aaa3 /rust/kernel/init.rs | |
| parent | 8586f1acd314a47d68d189331606ca235a05b972 (diff) | |
| download | lwn-692e8935e23efab6c5d5fc4b003816b33c8082f7.tar.gz lwn-692e8935e23efab6c5d5fc4b003816b33c8082f7.zip | |
rust: types: add `Opaque::ffi_init`
This function allows to easily initialize `Opaque` with the pin-init
API. `Opaque::ffi_init` takes a closure and returns a pin-initializer.
This pin-initiailizer calls the given closure with a pointer to the
inner `T`.
Co-developed-by: Gary Guo <gary@garyguo.net>
Signed-off-by: Gary Guo <gary@garyguo.net>
Signed-off-by: Benno Lossin <benno.lossin@proton.me>
Reviewed-by: Andreas Hindborg <a.hindborg@samsung.com>
Reviewed-by: Alice Ryhl <aliceryhl@google.com>
Link: https://lore.kernel.org/r/20230408122429.1103522-14-y86-dev@protonmail.com
[ Fixed typo. ]
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
Diffstat (limited to 'rust/kernel/init.rs')
| -rw-r--r-- | rust/kernel/init.rs | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/rust/kernel/init.rs b/rust/kernel/init.rs index ffd539e2f5ef..a1298c8bbda0 100644 --- a/rust/kernel/init.rs +++ b/rust/kernel/init.rs @@ -177,6 +177,14 @@ //! } //! ``` //! +//! For the special case where initializing a field is a single FFI-function call that cannot fail, +//! there exist the helper function [`Opaque::ffi_init`]. This function initialize a single +//! [`Opaque`] field by just delegating to the supplied closure. You can use these in combination +//! with [`pin_init!`]. +//! +//! For more information on how to use [`pin_init_from_closure()`], take a look at the uses inside +//! the `kernel` crate. The [`sync`] module is a good starting point. +//! //! [`sync`]: kernel::sync //! [pinning]: https://doc.rust-lang.org/std/pin/index.html //! [structurally pinned fields]: @@ -187,6 +195,7 @@ //! [`impl PinInit<T, E>`]: PinInit //! [`impl Init<T, E>`]: Init //! [`Opaque`]: kernel::types::Opaque +//! [`Opaque::ffi_init`]: kernel::types::Opaque::ffi_init //! [`pin_data`]: ::macros::pin_data use crate::{ |