| use crate::backend::c; |
| #[cfg(any( |
| all(target_os = "android", target_pointer_width = "64"), |
| target_os = "linux", |
| ))] |
| use crate::ffi::CStr; |
| |
| // `getauxval` wasn't supported in glibc until 2.16. |
| #[cfg(any( |
| all(target_os = "android", target_pointer_width = "64"), |
| target_os = "linux", |
| ))] |
| weak!(fn getauxval(c::c_ulong) -> *mut c::c_void); |
| |
| #[inline] |
| pub(crate) fn page_size() -> usize { |
| unsafe { c::sysconf(c::_SC_PAGESIZE) as usize } |
| } |
| |
| #[cfg(not(target_os = "wasi"))] |
| #[inline] |
| pub(crate) fn clock_ticks_per_second() -> u64 { |
| unsafe { c::sysconf(c::_SC_CLK_TCK) as u64 } |
| } |
| |
| #[cfg(any( |
| all(target_os = "android", target_pointer_width = "64"), |
| target_os = "linux", |
| ))] |
| #[inline] |
| pub(crate) fn linux_hwcap() -> (usize, usize) { |
| if let Some(libc_getauxval) = getauxval.get() { |
| unsafe { |
| let hwcap = libc_getauxval(c::AT_HWCAP) as usize; |
| let hwcap2 = libc_getauxval(c::AT_HWCAP2) as usize; |
| (hwcap, hwcap2) |
| } |
| } else { |
| (0, 0) |
| } |
| } |
| |
| #[cfg(any( |
| all(target_os = "android", target_pointer_width = "64"), |
| target_os = "linux", |
| ))] |
| #[inline] |
| pub(crate) fn linux_execfn() -> &'static CStr { |
| if let Some(libc_getauxval) = getauxval.get() { |
| unsafe { CStr::from_ptr(libc_getauxval(c::AT_EXECFN).cast()) } |
| } else { |
| cstr!("") |
| } |
| } |