From 692e8935e23efab6c5d5fc4b003816b33c8082f7 Mon Sep 17 00:00:00 2001 From: Benno Lossin Date: Sat, 8 Apr 2023 12:26:22 +0000 Subject: 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 Signed-off-by: Gary Guo Signed-off-by: Benno Lossin Reviewed-by: Andreas Hindborg Reviewed-by: Alice Ryhl Link: https://lore.kernel.org/r/20230408122429.1103522-14-y86-dev@protonmail.com [ Fixed typo. ] Signed-off-by: Miguel Ojeda --- rust/kernel/init.rs | 9 +++++++++ 1 file changed, 9 insertions(+) (limited to 'rust/kernel/init.rs') 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`]: PinInit //! [`impl Init`]: Init //! [`Opaque`]: kernel::types::Opaque +//! [`Opaque::ffi_init`]: kernel::types::Opaque::ffi_init //! [`pin_data`]: ::macros::pin_data use crate::{ -- cgit v1.2.3