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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354// SPDX-License-Identifier: GPL-2.0
//! Seq file bindings.//!//! C header: [`include/linux/seq_file.h`](srctree/include/linux/seq_file.h)
use crate::{bindings, fmt, str::CStrExt as _, types::NotThreadSafe, types::Opaque};
/// A utility for generating the contents of a seq file.#[repr(transparent)]pub struct SeqFile { inner: Opaque<bindings::seq_file>, _not_send: NotThreadSafe,}
impl SeqFile { /// Creates a new [`SeqFile`] from a raw pointer. /// /// # Safety /// /// The caller must ensure that for the duration of `'a` the following is satisfied: /// * The pointer points at a valid `struct seq_file`. /// * The `struct seq_file` is not accessed from any other thread. pub unsafe fn from_raw<'a>(ptr: *mut bindings::seq_file) -> &'a SeqFile { // SAFETY: The caller ensures that the reference is valid for 'a. There's no way to trigger // a data race by using the `&SeqFile` since this is the only thread accessing the seq_file. // // CAST: The layout of `struct seq_file` and `SeqFile` is compatible. unsafe { &*ptr.cast() } }
/// Used by the [`seq_print`] macro. #[inline] pub fn call_printf(&self, args: fmt::Arguments<'_>) { // SAFETY: Passing a void pointer to `Arguments` is valid for `%pA`. unsafe { bindings::seq_printf( self.inner.get(), c"%pA".as_char_ptr(), core::ptr::from_ref(&args).cast::<crate::ffi::c_void>(), ); } }}
/// Write to a [`SeqFile`] with the ordinary Rust formatting syntax.#[macro_export]macro_rules! seq_print { ($m:expr, $($arg:tt)+) => ( $m.call_printf($crate::prelude::fmt!($($arg)+)) );}pub use seq_print;