Function rustix::mm::mlock

pub unsafe fn mlock(ptr: *mut c_void, len: usize) -> Result<()>

Available on crate feature mm only.

mlock(ptr, len)—Lock memory into RAM.

Safety

This function operates on raw pointers, but it should only be used on memory which the caller owns. Technically, locking memory shouldn’t violate any invariants, but since unlocking it can violate invariants, this function is also unsafe for symmetry.

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.

References

• POSIX
• Linux