Rename heap modules in the core, alloc, and std crates to alloc

src/libstd/alloc.rs

@@ -0,0 +1,176 @@
+// Copyright 2017 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+//! dox
+
+#![unstable(issue = "32838", feature = "allocator_api")]
+
+pub use alloc_crate::heap::Heap;
+pub use alloc_system::System;
+#[doc(inline)] pub use core::heap::*;
+
+#[cfg(not(test))]
+#[doc(hidden)]
+#[allow(unused_attributes)]
+pub mod __default_lib_allocator {
+    use super::{System, Layout, Alloc, AllocErr};
+    use ptr;
+
+    // for symbol names src/librustc/middle/allocator.rs
+    // for signatures src/librustc_allocator/lib.rs
+
+    // linkage directives are provided as part of the current compiler allocator
+    // ABI
+
+    #[no_mangle]
+    #[rustc_std_internal_symbol]
+    pub unsafe extern fn __rdl_alloc(size: usize,
+                                     align: usize,
+                                     err: *mut u8) -> *mut u8 {
+        let layout = Layout::from_size_align_unchecked(size, align);
+        match System.alloc(layout) {
+            Ok(p) => p,
+            Err(e) => {
+                ptr::write(err as *mut AllocErr, e);
+                0 as *mut u8
+            }
+        }
+    }
+
+    #[no_mangle]
+    #[rustc_std_internal_symbol]
+    pub unsafe extern fn __rdl_oom(err: *const u8) -> ! {
+        System.oom((*(err as *const AllocErr)).clone())
+    }
+
+    #[no_mangle]
+    #[rustc_std_internal_symbol]
+    pub unsafe extern fn __rdl_dealloc(ptr: *mut u8,
+                                       size: usize,
+                                       align: usize) {
+        System.dealloc(ptr, Layout::from_size_align_unchecked(size, align))
+    }
+
+    #[no_mangle]
+    #[rustc_std_internal_symbol]
+    pub unsafe extern fn __rdl_usable_size(layout: *const u8,
+                                           min: *mut usize,
+                                           max: *mut usize) {
+        let pair = System.usable_size(&*(layout as *const Layout));
+        *min = pair.0;
+        *max = pair.1;
+    }
+
+    #[no_mangle]
+    #[rustc_std_internal_symbol]
+    pub unsafe extern fn __rdl_realloc(ptr: *mut u8,
+                                       old_size: usize,
+                                       old_align: usize,
+                                       new_size: usize,
+                                       new_align: usize,
+                                       err: *mut u8) -> *mut u8 {
+        let old_layout = Layout::from_size_align_unchecked(old_size, old_align);
+        let new_layout = Layout::from_size_align_unchecked(new_size, new_align);
+        match System.realloc(ptr, old_layout, new_layout) {
+            Ok(p) => p,
+            Err(e) => {
+                ptr::write(err as *mut AllocErr, e);
+                0 as *mut u8
+            }
+        }
+    }
+
+    #[no_mangle]
+    #[rustc_std_internal_symbol]
+    pub unsafe extern fn __rdl_alloc_zeroed(size: usize,
+                                            align: usize,
+                                            err: *mut u8) -> *mut u8 {
+        let layout = Layout::from_size_align_unchecked(size, align);
+        match System.alloc_zeroed(layout) {
+            Ok(p) => p,
+            Err(e) => {
+                ptr::write(err as *mut AllocErr, e);
+                0 as *mut u8
+            }
+        }
+    }
+
+    #[no_mangle]
+    #[rustc_std_internal_symbol]
+    pub unsafe extern fn __rdl_alloc_excess(size: usize,
+                                            align: usize,
+                                            excess: *mut usize,
+                                            err: *mut u8) -> *mut u8 {
+        let layout = Layout::from_size_align_unchecked(size, align);
+        match System.alloc_excess(layout) {
+            Ok(p) => {
+                *excess = p.1;
+                p.0
+            }
+            Err(e) => {
+                ptr::write(err as *mut AllocErr, e);
+                0 as *mut u8
+            }
+        }
+    }
+
+    #[no_mangle]
+    #[rustc_std_internal_symbol]
+    pub unsafe extern fn __rdl_realloc_excess(ptr: *mut u8,
+                                              old_size: usize,
+                                              old_align: usize,
+                                              new_size: usize,
+                                              new_align: usize,
+                                              excess: *mut usize,
+                                              err: *mut u8) -> *mut u8 {
+        let old_layout = Layout::from_size_align_unchecked(old_size, old_align);
+        let new_layout = Layout::from_size_align_unchecked(new_size, new_align);
+        match System.realloc_excess(ptr, old_layout, new_layout) {
+            Ok(p) => {
+                *excess = p.1;
+                p.0
+            }
+            Err(e) => {
+                ptr::write(err as *mut AllocErr, e);
+                0 as *mut u8
+            }
+        }
+    }
+
+    #[no_mangle]
+    #[rustc_std_internal_symbol]
+    pub unsafe extern fn __rdl_grow_in_place(ptr: *mut u8,
+                                             old_size: usize,
+                                             old_align: usize,
+                                             new_size: usize,
+                                             new_align: usize) -> u8 {
+        let old_layout = Layout::from_size_align_unchecked(old_size, old_align);
+        let new_layout = Layout::from_size_align_unchecked(new_size, new_align);
+        match System.grow_in_place(ptr, old_layout, new_layout) {
+            Ok(()) => 1,
+            Err(_) => 0,
+        }
+    }
+
+    #[no_mangle]
+    #[rustc_std_internal_symbol]
+    pub unsafe extern fn __rdl_shrink_in_place(ptr: *mut u8,
+                                               old_size: usize,
+                                               old_align: usize,
+                                               new_size: usize,
+                                               new_align: usize) -> u8 {
+        let old_layout = Layout::from_size_align_unchecked(old_size, old_align);
+        let new_layout = Layout::from_size_align_unchecked(new_size, new_align);
+        match System.shrink_in_place(ptr, old_layout, new_layout) {
+            Ok(()) => 1,
+            Err(_) => 0,
+        }
+    }
+}