diff options
Diffstat (limited to 'src/test/ui/allocator/custom.rs')
-rw-r--r-- | src/test/ui/allocator/custom.rs | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/src/test/ui/allocator/custom.rs b/src/test/ui/allocator/custom.rs new file mode 100644 index 000000000..10cbc23c4 --- /dev/null +++ b/src/test/ui/allocator/custom.rs @@ -0,0 +1,59 @@ +// run-pass + +// aux-build:helper.rs +// no-prefer-dynamic + +#![feature(allocator_api)] +#![feature(slice_ptr_get)] + +extern crate helper; + +use std::alloc::{self, Allocator, Global, Layout, System}; +use std::sync::atomic::{AtomicUsize, Ordering}; + +static HITS: AtomicUsize = AtomicUsize::new(0); + +struct A; + +unsafe impl alloc::GlobalAlloc for A { + unsafe fn alloc(&self, layout: Layout) -> *mut u8 { + HITS.fetch_add(1, Ordering::SeqCst); + alloc::GlobalAlloc::alloc(&System, layout) + } + + unsafe fn dealloc(&self, ptr: *mut u8, layout: Layout) { + HITS.fetch_add(1, Ordering::SeqCst); + alloc::GlobalAlloc::dealloc(&System, ptr, layout) + } +} + +#[global_allocator] +static GLOBAL: A = A; + +fn main() { + println!("hello!"); + + let n = HITS.load(Ordering::SeqCst); + assert!(n > 0); + unsafe { + let layout = Layout::from_size_align(4, 2).unwrap(); + + let memory = Global.allocate(layout.clone()).unwrap(); + helper::work_with(&memory); + assert_eq!(HITS.load(Ordering::SeqCst), n + 1); + Global.deallocate(memory.as_non_null_ptr(), layout); + assert_eq!(HITS.load(Ordering::SeqCst), n + 2); + + let s = String::with_capacity(10); + helper::work_with(&s); + assert_eq!(HITS.load(Ordering::SeqCst), n + 3); + drop(s); + assert_eq!(HITS.load(Ordering::SeqCst), n + 4); + + let memory = System.allocate(layout.clone()).unwrap(); + helper::work_with(&memory); + assert_eq!(HITS.load(Ordering::SeqCst), n + 4); + System.deallocate(memory.as_non_null_ptr(), layout); + assert_eq!(HITS.load(Ordering::SeqCst), n + 4); + } +} |