uefi: Make the allocator module unconditionally enabled

The `global_allocator` feature now only controls whether the
`#[global_allocator]` attribute is set on `Allocator`; the `Allocator` itself is
now always available.

Author: nicholasbishop

CHANGELOG.md

@@ -4,7 +4,10 @@
 
 ### Changed
 
-- The `uefi::global_allocator` module has been renamed to `uefi::allocator`.
+- The `global_allocator` module has been renamed to `allocator`, and is now
+  available regardless of whether the `global_allocator` feature is enabled. The
+  `global_allocator` feature now only controls whether `allocator::Allocator` is
+  set as Rust's global allocator.
 
 ## uefi-macros - [Unreleased]
 

uefi/src/allocator.rs

@@ -1,7 +1,7 @@
 //! This module implements Rust's global allocator interface using UEFI's memory allocation functions.
 //!
-//! Enabling the `alloc` optional feature in your app will allow you to use Rust's higher-level data structures,
-//! like boxes, vectors, hash maps, linked lists and so on.
+//! If the `global_allocator` feature is enabled, the [`Allocator`] will be used
+//! as the global Rust allocator.
 //!
 //! # Usage
 //!
@@ -112,5 +112,6 @@ unsafe impl GlobalAlloc for Allocator {
     }
 }
 
+#[cfg(feature = "global_allocator")]
 #[global_allocator]
 static ALLOCATOR: Allocator = Allocator;

uefi/src/lib.rs

@@ -43,8 +43,8 @@
 //!   `Vec` rather than filling a statically-sized array. This requires
 //!   a global allocator; you can use the `global_allocator` feature or
 //!   provide your own.
-//! - `global_allocator`: Implement a [global allocator] using UEFI
-//!   functions. This is a simple allocator that relies on the UEFI pool
+//! - `global_allocator`: Set [`allocator::Allocator`] as the global Rust
+//!   allocator. This is a simple allocator that relies on the UEFI pool
 //!   allocator. You can choose to provide your own allocator instead of
 //!   using this feature, or no allocator at all if you don't need to
 //!   dynamically allocate any memory.
@@ -108,7 +108,6 @@ pub mod proto;
 
 pub mod prelude;
 
-#[cfg(feature = "global_allocator")]
 pub mod allocator;
 
 #[cfg(feature = "logger")]