mirror of https://github.com/rust-lang/rust
37 lines
1.0 KiB
Rust
37 lines
1.0 KiB
Rust
//@ run-pass
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//@ aux-build:custom.rs
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//@ aux-build:helper.rs
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//@ no-prefer-dynamic
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#![feature(allocator_api)]
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#![feature(slice_ptr_get)]
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extern crate custom;
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extern crate helper;
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use std::alloc::{Allocator, Global, Layout, System};
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use std::sync::atomic::{AtomicUsize, Ordering};
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#[global_allocator]
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static GLOBAL: custom::A = custom::A(AtomicUsize::new(0));
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fn main() {
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unsafe {
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let n = GLOBAL.0.load(Ordering::SeqCst);
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let layout = Layout::from_size_align(4, 2).unwrap();
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let memory = Global.allocate(layout.clone()).unwrap();
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helper::work_with(&memory);
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assert_eq!(GLOBAL.0.load(Ordering::SeqCst), n + 1);
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Global.deallocate(memory.as_non_null_ptr(), layout);
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assert_eq!(GLOBAL.0.load(Ordering::SeqCst), n + 2);
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let memory = System.allocate(layout.clone()).unwrap();
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assert_eq!(GLOBAL.0.load(Ordering::SeqCst), n + 2);
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helper::work_with(&memory);
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System.deallocate(memory.as_non_null_ptr(), layout);
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assert_eq!(GLOBAL.0.load(Ordering::SeqCst), n + 2);
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}
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}
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