forked from mirrors/linux
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>
39 lines
797 B
Rust
39 lines
797 B
Rust
// SPDX-License-Identifier: Apache-2.0 OR MIT
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use pin_init::*;
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// Struct with size over 1GiB
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#[derive(Debug)]
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pub struct BigStruct {
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buf: [u8; 1024 * 1024 * 1024],
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a: u64,
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b: u64,
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c: u64,
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d: u64,
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managed_buf: ManagedBuf,
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}
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#[derive(Debug)]
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pub struct ManagedBuf {
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buf: [u8; 1024 * 1024],
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}
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impl ManagedBuf {
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pub fn new() -> impl Init<Self> {
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init!(ManagedBuf { buf <- zeroed() })
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}
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}
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fn main() {
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// we want to initialize the struct in-place, otherwise we would get a stackoverflow
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let buf: Box<BigStruct> = Box::init(init!(BigStruct {
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buf <- zeroed(),
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a: 7,
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b: 186,
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c: 7789,
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d: 34,
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managed_buf <- ManagedBuf::new(),
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}))
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.unwrap();
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println!("{}", core::mem::size_of_val(&*buf));
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}
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