99 lines
3.8 KiB
Rust
99 lines
3.8 KiB
Rust
// Copyright 2014-2015 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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pub use alloc::{Excess, Layout, AllocErr, CannotReallocInPlace};
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use core::alloc::Alloc as CoreAlloc;
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#[doc(hidden)]
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pub mod __core {
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pub use core::*;
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}
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/// Compatibility with older versions of #[global_allocator] during bootstrap
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pub unsafe trait Alloc {
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unsafe fn alloc(&mut self, layout: Layout) -> Result<*mut u8, AllocErr>;
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unsafe fn dealloc(&mut self, ptr: *mut u8, layout: Layout);
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fn oom(&mut self, err: AllocErr) -> !;
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fn usable_size(&self, layout: &Layout) -> (usize, usize);
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unsafe fn realloc(&mut self,
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ptr: *mut u8,
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layout: Layout,
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new_layout: Layout) -> Result<*mut u8, AllocErr>;
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unsafe fn alloc_zeroed(&mut self, layout: Layout) -> Result<*mut u8, AllocErr>;
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unsafe fn alloc_excess(&mut self, layout: Layout) -> Result<Excess, AllocErr>;
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unsafe fn realloc_excess(&mut self,
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ptr: *mut u8,
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layout: Layout,
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new_layout: Layout) -> Result<Excess, AllocErr>;
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unsafe fn grow_in_place(&mut self,
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ptr: *mut u8,
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layout: Layout,
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new_layout: Layout) -> Result<(), CannotReallocInPlace>;
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unsafe fn shrink_in_place(&mut self,
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ptr: *mut u8,
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layout: Layout,
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new_layout: Layout) -> Result<(), CannotReallocInPlace>;
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}
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#[allow(deprecated)]
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unsafe impl<T> Alloc for T where T: CoreAlloc {
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unsafe fn alloc(&mut self, layout: Layout) -> Result<*mut u8, AllocErr> {
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CoreAlloc::alloc(self, layout)
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}
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unsafe fn dealloc(&mut self, ptr: *mut u8, layout: Layout) {
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CoreAlloc::dealloc(self, ptr, layout)
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}
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fn oom(&mut self, err: AllocErr) -> ! {
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CoreAlloc::oom(self, err)
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}
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fn usable_size(&self, layout: &Layout) -> (usize, usize) {
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CoreAlloc::usable_size(self, layout)
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}
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unsafe fn realloc(&mut self,
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ptr: *mut u8,
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layout: Layout,
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new_layout: Layout) -> Result<*mut u8, AllocErr> {
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CoreAlloc::realloc(self, ptr, layout, new_layout)
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}
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unsafe fn alloc_zeroed(&mut self, layout: Layout) -> Result<*mut u8, AllocErr> {
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CoreAlloc::alloc_zeroed(self, layout)
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}
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unsafe fn alloc_excess(&mut self, layout: Layout) -> Result<Excess, AllocErr> {
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CoreAlloc::alloc_excess(self, layout)
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}
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unsafe fn realloc_excess(&mut self,
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ptr: *mut u8,
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layout: Layout,
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new_layout: Layout) -> Result<Excess, AllocErr> {
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CoreAlloc::realloc_excess(self, ptr, layout, new_layout)
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}
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unsafe fn grow_in_place(&mut self,
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ptr: *mut u8,
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layout: Layout,
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new_layout: Layout) -> Result<(), CannotReallocInPlace> {
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CoreAlloc::grow_in_place(self, ptr, layout, new_layout)
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}
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unsafe fn shrink_in_place(&mut self,
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ptr: *mut u8,
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layout: Layout,
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new_layout: Layout) -> Result<(), CannotReallocInPlace> {
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CoreAlloc::shrink_in_place(self, ptr, layout, new_layout)
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}
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}
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