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use core::ffi::c_void;
use crate::{Argument, EbpfContext, args::btf_arg};
pub struct FEntryContext {
ctx: *mut c_void,
}
impl FEntryContext {
pub const fn new(ctx: *mut c_void) -> Self {
Self { ctx }
}
/// Returns the `n`th argument to passed to the probe function, starting from 0.
///
/// # Examples
///
/// ```no_run
/// # use aya_ebpf::{cty::c_int, programs::FEntryContext};
/// # #[expect(non_camel_case_types)]
/// # type pid_t = c_int;
/// # #[expect(non_camel_case_types)]
/// # struct task_struct {
/// # pid: pid_t,
/// # }
/// unsafe fn try_fentry_try_to_wake_up(ctx: FEntryContext) -> Result<u32, u32> {
/// let tp: *const task_struct = ctx.arg(0);
///
/// // Do something with tp
///
/// Ok(0)
/// }
/// ```
pub fn arg<T: Argument>(&self, n: usize) -> T {
btf_arg(self, n)
}
}
impl EbpfContext for FEntryContext {
fn as_ptr(&self) -> *mut c_void {
self.ctx
}
}