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38 lines
822 B
38 lines
822 B
use std::ffi::c_void;
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use std::ptr;
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#[cfg(nightly)]
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#[inline(never)]
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pub fn explicit_prune(buffer: &mut[u8]) {
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unsafe {
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ptr::write_bytes(buffer.as_mut_ptr() as *mut c_void, 0, buffer.len());
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if cfg!(target_arch = "x86_64") || cfg !(target_arch = "x86") {
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asm!("clflush [{}]", in(reg)buffer.as_mut_ptr());
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} else {
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asm!("")
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}
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}
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}
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#[cfg(not(nightly))]
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#[inline]
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pub fn explicit_prune(buffer: &mut[u8]) {
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extern "C" {
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fn explicit_bzero(_: *mut c_void, _:usize);
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}
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unsafe {
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explicit_bzero(buffer.as_mut_ptr() as *mut c_void, buffer.len());
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}
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}
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pub fn prune(buffer: &mut [u8])
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{
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#[cfg(feature="explicit_clear")] explicit_prune(buffer);
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#[cfg(not(feature="explicit_clear"))] unsafe {
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std::ptr::write_bytes(buffer.as_mut_ptr(), 0, buffer.len());
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}
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}
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