mirror of
git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2025-09-04 20:19:47 +08:00
84837cf6fa
Replace the examples in the documentation by the ones from the user-space version and introduce the standalone examples from the user-space version such as the `CMutex<T>` type. The `CMutex<T>` example from the pinned-init repository [1] is used in several documentation examples in the user-space version instead of the kernel `Mutex<T>` type (as it's not available). In order to split off the pin-init crate, all examples need to be free of kernel-specific types. Link: https://github.com/rust-for-Linux/pinned-init [1] Signed-off-by: Benno Lossin <benno.lossin@proton.me> Reviewed-by: Fiona Behrens <me@kloenk.dev> Tested-by: Andreas Hindborg <a.hindborg@kernel.org> Link: https://lore.kernel.org/r/20250308110339.2997091-6-benno.lossin@proton.me Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
40 lines
797 B
Rust
40 lines
797 B
Rust
// SPDX-License-Identifier: Apache-2.0 OR MIT
|
|
|
|
use pin_init::*;
|
|
|
|
// Struct with size over 1GiB
|
|
#[derive(Debug)]
|
|
pub struct BigStruct {
|
|
buf: [u8; 1024 * 1024 * 1024],
|
|
a: u64,
|
|
b: u64,
|
|
c: u64,
|
|
d: u64,
|
|
managed_buf: ManagedBuf,
|
|
}
|
|
|
|
#[derive(Debug)]
|
|
pub struct ManagedBuf {
|
|
buf: [u8; 1024 * 1024],
|
|
}
|
|
|
|
impl ManagedBuf {
|
|
pub fn new() -> impl Init<Self> {
|
|
init!(ManagedBuf { buf <- zeroed() })
|
|
}
|
|
}
|
|
|
|
fn main() {
|
|
// we want to initialize the struct in-place, otherwise we would get a stackoverflow
|
|
let buf: Box<BigStruct> = Box::init(init!(BigStruct {
|
|
buf <- zeroed(),
|
|
a: 7,
|
|
b: 186,
|
|
c: 7789,
|
|
d: 34,
|
|
managed_buf <- ManagedBuf::new(),
|
|
}))
|
|
.unwrap();
|
|
println!("{}", core::mem::size_of_val(&*buf));
|
|
}
|