uefi: Add slice(_mut) accessors to AlignedBuffer

Author: seijikun

uefi/src/mem/aligned_buffer.rs

@@ -2,8 +2,8 @@
 
 use alloc::alloc::{Layout, LayoutError, alloc, dealloc};
 use core::error::Error;
-use core::fmt;
 use core::ptr::NonNull;
+use core::{fmt, slice};
 
 /// Helper class to maintain the lifetime of a memory region allocated with a non-standard alignment.
 /// Facilitates RAII to properly deallocate when lifetime of the object ends.
@@ -51,6 +51,18 @@ impl AlignedBuffer {
         self.ptr.as_ptr()
     }
 
+    /// Get the underlying memory region as immutable slice.
+    #[must_use]
+    pub const fn as_slice(&self) -> &[u8] {
+        unsafe { slice::from_raw_parts(self.ptr(), self.size()) }
+    }
+
+    /// Get the underlying memory region as mutable slice.
+    #[must_use]
+    pub const fn as_slice_mut(&mut self) -> &mut [u8] {
+        unsafe { slice::from_raw_parts_mut(self.ptr_mut(), self.size()) }
+    }
+
     /// Get the size of the aligned memory region managed by this instance.
     #[must_use]
     pub const fn size(&self) -> usize {