0f4ef003ac
As discussed in https://github.com/rust-lang/rust/issues/49668#issuecomment-384893456 and subsequent, there are use-cases where the OOM handler needs to know the size of the allocation that failed. The alignment might also be a cause for allocation failure, so providing it as well can be useful.
22 lines
773 B
Rust
22 lines
773 B
Rust
// 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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#![feature(allocator_api, nonnull)]
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use std::alloc::{Alloc, Global, Layout, oom};
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fn main() {
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unsafe {
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let ptr = Global.alloc_one::<i32>().unwrap_or_else(|_| oom(Layout::new::<i32>()));
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*ptr.as_ptr() = 4;
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assert_eq!(*ptr.as_ptr(), 4);
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Global.dealloc_one(ptr);
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}
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}
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