32 lines
1.0 KiB
Rust
32 lines
1.0 KiB
Rust
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// Copyright 2017 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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// no-prefer-dynamic
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#![feature(heap_api, allocator_api)]
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#![crate_type = "rlib"]
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use std::heap::{Alloc, System, AllocErr, Layout};
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use std::sync::atomic::{AtomicUsize, Ordering};
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pub struct A(pub AtomicUsize);
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unsafe impl<'a> Alloc for &'a A {
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unsafe fn alloc(&mut self, layout: Layout) -> Result<*mut u8, AllocErr> {
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self.0.fetch_add(1, Ordering::SeqCst);
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System.alloc(layout)
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}
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unsafe fn dealloc(&mut self, ptr: *mut u8, layout: Layout) {
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self.0.fetch_add(1, Ordering::SeqCst);
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System.dealloc(ptr, layout)
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}
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}
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