pub unsafe fn mlock(ptr: *mut c_void, len: usize) -> Result<()>Expand description
mlock(ptr, len)—Lock memory into RAM.
Some implementations implicitly round the memory region out to the nearest page boundaries, so this function may lock more memory than explicitly requested if the memory isn’t page-aligned. Other implementations fail if the memory isn’t page-aligned.
§Safety
The range of memory starting at ptr, rounded down to the applicable page
boundary, and extending for len bytes, rounded up to the applicable page
size, must be valid to read with ptr’s provenance.