Function std::slice::from_raw_parts_mut
1.0.0 (const: unstable) · source · pub unsafe fn from_raw_parts_mut<'a, T>(data: *mut T, len: usize) -> &'a mut [T]
Expand description
Performs the same functionality as from_raw_parts
, except that a
mutable slice is returned.
§Safety
Behavior is undefined if any of the following conditions are violated:
-
data
must be valid for both reads and writes forlen * mem::size_of::<T>()
many bytes, and it must be properly aligned. This means in particular:- The entire memory range of this slice must be contained within a single allocated object! Slices can never span across multiple allocated objects.
data
must be non-null and aligned even for zero-length slices. One reason for this is that enum layout optimizations may rely on references (including slices of any length) being aligned and non-null to distinguish them from other data. You can obtain a pointer that is usable asdata
for zero-length slices usingNonNull::dangling()
.
-
data
must point tolen
consecutive properly initialized values of typeT
. -
The memory referenced by the returned slice must not be accessed through any other pointer (not derived from the return value) for the duration of lifetime
'a
. Both read and write accesses are forbidden. -
The total size
len * mem::size_of::<T>()
of the slice must be no larger thanisize::MAX
, and adding that size todata
must not “wrap around” the address space. See the safety documentation ofpointer::offset
.