Auto merge of rust-lang#79286 - TimDiekmann:rename-allocref, r=Lokath…

…or,Wodann,m-ou-se

Rename `AllocRef` to `Allocator` and `(de)alloc` to `(de)allocate`

Calling `Box::alloc_ref` and `Vec::alloc_ref` sounds like allocating a reference. To solve this ambiguity, this renames `AllocRef` to `Allocator` and `alloc` to `allocate`. For a more detailed explaination see rust-lang/wg-allocators#76.

closes rust-lang/wg-allocators#76

r? `@KodrAus`
`@rustbot` modify labels: +A-allocators +T-libs
`@rustbot` ping wg-allocators

library/alloc/src/alloc.rs

@@ -38,7 +38,7 @@ extern "Rust" {
 
 /// The global memory allocator.
 ///
-/// This type implements the [`AllocRef`] trait by forwarding calls
+/// This type implements the [`Allocator`] trait by forwarding calls
 /// to the allocator registered with the `#[global_allocator]` attribute
 /// if there is one, or the `std` crate’s default.
 ///
@@ -59,7 +59,7 @@ pub use std::alloc::Global;
 /// if there is one, or the `std` crate’s default.
 ///
 /// This function is expected to be deprecated in favor of the `alloc` method
-/// of the [`Global`] type when it and the [`AllocRef`] trait become stable.
+/// of the [`Global`] type when it and the [`Allocator`] trait become stable.
 ///
 /// # Safety
 ///
@@ -93,7 +93,7 @@ pub unsafe fn alloc(layout: Layout) -> *mut u8 {
 /// if there is one, or the `std` crate’s default.
 ///
 /// This function is expected to be deprecated in favor of the `dealloc` method
-/// of the [`Global`] type when it and the [`AllocRef`] trait become stable.
+/// of the [`Global`] type when it and the [`Allocator`] trait become stable.
 ///
 /// # Safety
 ///
@@ -111,7 +111,7 @@ pub unsafe fn dealloc(ptr: *mut u8, layout: Layout) {
 /// if there is one, or the `std` crate’s default.
 ///
 /// This function is expected to be deprecated in favor of the `realloc` method
-/// of the [`Global`] type when it and the [`AllocRef`] trait become stable.
+/// of the [`Global`] type when it and the [`Allocator`] trait become stable.
 ///
 /// # Safety
 ///
@@ -129,7 +129,7 @@ pub unsafe fn realloc(ptr: *mut u8, layout: Layout, new_size: usize) -> *mut u8
 /// if there is one, or the `std` crate’s default.
 ///
 /// This function is expected to be deprecated in favor of the `alloc_zeroed` method
-/// of the [`Global`] type when it and the [`AllocRef`] trait become stable.
+/// of the [`Global`] type when it and the [`Allocator`] trait become stable.
 ///
 /// # Safety
 ///
@@ -170,7 +170,7 @@ impl Global {
         }
     }
 
-    // SAFETY: Same as `AllocRef::grow`
+    // SAFETY: Same as `Allocator::grow`
     #[inline]
     unsafe fn grow_impl(
         &self,
@@ -211,7 +211,7 @@ impl Global {
             old_size => unsafe {
                 let new_ptr = self.alloc_impl(new_layout, zeroed)?;
                 ptr::copy_nonoverlapping(ptr.as_ptr(), new_ptr.as_mut_ptr(), old_size);
-                self.dealloc(ptr, old_layout);
+                self.deallocate(ptr, old_layout);
                 Ok(new_ptr)
             },
         }
@@ -220,19 +220,19 @@ impl Global {
 
 #[unstable(feature = "allocator_api", issue = "32838")]
 #[cfg(not(test))]
-unsafe impl AllocRef for Global {
+unsafe impl Allocator for Global {
     #[inline]
-    fn alloc(&self, layout: Layout) -> Result<NonNull<[u8]>, AllocError> {
+    fn allocate(&self, layout: Layout) -> Result<NonNull<[u8]>, AllocError> {
         self.alloc_impl(layout, false)
     }
 
     #[inline]
-    fn alloc_zeroed(&self, layout: Layout) -> Result<NonNull<[u8]>, AllocError> {
+    fn allocate_zeroed(&self, layout: Layout) -> Result<NonNull<[u8]>, AllocError> {
         self.alloc_impl(layout, true)
     }
 
     #[inline]
-    unsafe fn dealloc(&self, ptr: NonNull<u8>, layout: Layout) {
+    unsafe fn deallocate(&self, ptr: NonNull<u8>, layout: Layout) {
         if layout.size() != 0 {
             // SAFETY: `layout` is non-zero in size,
             // other conditions must be upheld by the caller
@@ -277,7 +277,7 @@ unsafe impl AllocRef for Global {
         match new_layout.size() {
             // SAFETY: conditions must be upheld by the caller
             0 => unsafe {
-                self.dealloc(ptr, old_layout);
+                self.deallocate(ptr, old_layout);
                 Ok(NonNull::slice_from_raw_parts(new_layout.dangling(), 0))
             },
 
@@ -297,9 +297,9 @@ unsafe impl AllocRef for Global {
             // `new_ptr`. Thus, the call to `copy_nonoverlapping` is safe. The safety contract
             // for `dealloc` must be upheld by the caller.
             new_size => unsafe {
-                let new_ptr = self.alloc(new_layout)?;
+                let new_ptr = self.allocate(new_layout)?;
                 ptr::copy_nonoverlapping(ptr.as_ptr(), new_ptr.as_mut_ptr(), new_size);
-                self.dealloc(ptr, old_layout);
+                self.deallocate(ptr, old_layout);
                 Ok(new_ptr)
             },
         }
@@ -313,7 +313,7 @@ unsafe impl AllocRef for Global {
 #[inline]
 unsafe fn exchange_malloc(size: usize, align: usize) -> *mut u8 {
     let layout = unsafe { Layout::from_size_align_unchecked(size, align) };
-    match Global.alloc(layout) {
+    match Global.allocate(layout) {
         Ok(ptr) => ptr.as_mut_ptr(),
         Err(_) => handle_alloc_error(layout),
     }
@@ -322,16 +322,16 @@ unsafe fn exchange_malloc(size: usize, align: usize) -> *mut u8 {
 #[cfg_attr(not(test), lang = "box_free")]
 #[inline]
 // This signature has to be the same as `Box`, otherwise an ICE will happen.
-// When an additional parameter to `Box` is added (like `A: AllocRef`), this has to be added here as
+// When an additional parameter to `Box` is added (like `A: Allocator`), this has to be added here as
 // well.
-// For example if `Box` is changed to  `struct Box<T: ?Sized, A: AllocRef>(Unique<T>, A)`,
-// this function has to be changed to `fn box_free<T: ?Sized, A: AllocRef>(Unique<T>, A)` as well.
-pub(crate) unsafe fn box_free<T: ?Sized, A: AllocRef>(ptr: Unique<T>, alloc: A) {
+// For example if `Box` is changed to  `struct Box<T: ?Sized, A: Allocator>(Unique<T>, A)`,
+// this function has to be changed to `fn box_free<T: ?Sized, A: Allocator>(Unique<T>, A)` as well.
+pub(crate) unsafe fn box_free<T: ?Sized, A: Allocator>(ptr: Unique<T>, alloc: A) {
     unsafe {
         let size = size_of_val(ptr.as_ref());
         let align = min_align_of_val(ptr.as_ref());
         let layout = Layout::from_size_align_unchecked(size, align);
-        alloc.dealloc(ptr.cast().into(), layout)
+        alloc.deallocate(ptr.cast().into(), layout)
     }
 }
 

library/alloc/src/alloc/tests.rs

@@ -9,15 +9,15 @@ fn allocate_zeroed() {
     unsafe {
         let layout = Layout::from_size_align(1024, 1).unwrap();
         let ptr =
-            Global.alloc_zeroed(layout.clone()).unwrap_or_else(|_| handle_alloc_error(layout));
+            Global.allocate_zeroed(layout.clone()).unwrap_or_else(|_| handle_alloc_error(layout));
 
         let mut i = ptr.as_non_null_ptr().as_ptr();
         let end = i.add(layout.size());
         while i < end {
             assert_eq!(*i, 0);
             i = i.offset(1);
         }
-        Global.dealloc(ptr.as_non_null_ptr(), layout);
+        Global.deallocate(ptr.as_non_null_ptr(), layout);
     }
 }