workspace: move crates under crates

utils/src/mmap.rs

@@ -1,34 +0,0 @@
-use {
-    crate::{oserror::OsError, ptr_ext::PtrExt},
-    std::ptr,
-    uapi::c,
-};
-
-pub struct Mmapped {
-    pub ptr: *const [u8],
-}
-
-pub fn mmap(
-    len: usize,
-    prot: c::c_int,
-    flags: c::c_int,
-    fd: c::c_int,
-    offset: c::off_t,
-) -> Result<Mmapped, OsError> {
-    let res = unsafe { c::mmap(ptr::null_mut(), len, prot, flags, fd, offset) };
-    if res == c::MAP_FAILED {
-        Err(OsError::default())
-    } else {
-        Ok(Mmapped {
-            ptr: ptr::slice_from_raw_parts(res.cast(), len),
-        })
-    }
-}
-
-impl Drop for Mmapped {
-    fn drop(&mut self) {
-        unsafe {
-            c::munmap(self.ptr.deref().as_ptr() as _, self.ptr.deref().len());
-        }
-    }
-}