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//! Run-time feature detection on Linux
//!
#[cfg(feature = "std_detect_file_io")]
use alloc::vec::Vec;
mod auxvec;
#[cfg(feature = "std_detect_file_io")]
mod cpuinfo;
#[cfg(feature = "std_detect_file_io")]
fn read_file(path: &str) -> Result<Vec<u8>, ()> {
let mut path = Vec::from(path.as_bytes());
path.push(0);
unsafe {
let file = libc::open(path.as_ptr() as *const libc::c_char, libc::O_RDONLY);
if file == -1 {
return Err(());
}
let mut data = Vec::new();
loop {
data.reserve(4096);
let spare = data.spare_capacity_mut();
match libc::read(file, spare.as_mut_ptr() as *mut _, spare.len()) {
-1 => {
libc::close(file);
return Err(());
}
0 => break,
n => data.set_len(data.len() + n as usize),
}
}
libc::close(file);
Ok(data)
}
}
cfg_if::cfg_if! {
if #[cfg(target_arch = "aarch64")] {
mod aarch64;
pub(crate) use self::aarch64::detect_features;
} else if #[cfg(target_arch = "arm")] {
mod arm;
pub(crate) use self::arm::detect_features;
} else if #[cfg(any(target_arch = "riscv32", target_arch = "riscv64"))] {
mod riscv;
pub(crate) use self::riscv::detect_features;
} else if #[cfg(any(target_arch = "mips", target_arch = "mips64"))] {
mod mips;
pub(crate) use self::mips::detect_features;
} else if #[cfg(any(target_arch = "powerpc", target_arch = "powerpc64"))] {
mod powerpc;
pub(crate) use self::powerpc::detect_features;
} else {
use crate::detect::cache;
/// Performs run-time feature detection.
pub(crate) fn detect_features() -> cache::Initializer {
cache::Initializer::default()
}
}
}
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