Merge branch 'context_api-refactor' of github.com:wasmerio/wasmer int…

…o context_api-refactor

lib/api/src/sys/externals/memory.rs

@@ -86,6 +86,36 @@ impl Memory {
         self.buffer(ctx).len.try_into().unwrap()
     }
 
+    /// Retrieve a slice of the memory contents.
+    ///
+    /// # Safety
+    ///
+    /// Until the returned slice is dropped, it is undefined behaviour to
+    /// modify the memory contents in any way including by calling a wasm
+    /// function that writes to the memory or by resizing the memory.
+    #[doc(hidden)]
+    pub unsafe fn data_unchecked(&self, ctx: &impl AsStoreRef) -> &[u8] {
+        self.data_unchecked_mut(ctx)
+    }
+
+    /// Retrieve a mutable slice of the memory contents.
+    ///
+    /// # Safety
+    ///
+    /// This method provides interior mutability without an UnsafeCell. Until
+    /// the returned value is dropped, it is undefined behaviour to read or
+    /// write to the pointed-to memory in any way except through this slice,
+    /// including by calling a wasm function that reads the memory contents or
+    /// by resizing this Memory.
+    #[allow(clippy::mut_from_ref)]
+    #[doc(hidden)]
+    pub unsafe fn data_unchecked_mut(&self, ctx: &impl AsStoreRef) -> &mut [u8] {
+        slice::from_raw_parts_mut(
+            self.buffer(ctx).base,
+            self.buffer(ctx).len.try_into().unwrap(),
+        )
+    }
+
     /// Returns the size (in [`Pages`]) of the `Memory`.
     ///
     /// # Example