src/test/run-pass/intrinsic-atomics.rs

   1 // Copyright 2012 The Rust Project Developers. See the COPYRIGHT
   2 // file at the top-level directory of this distribution and at
   3 // http://rust-lang.org/COPYRIGHT.
   4 //
   5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
   6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
   7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
   8 // option. This file may not be copied, modified, or distributed
   9 // except according to those terms.
  10
  11 // pretty-expanded FIXME #23616
  12
  13 #![allow(unknown_features)]
  14 #![feature(box_syntax)]
  15 #![feature(intrinsics)]
  16
  17 mod rusti {
  18     extern "rust-intrinsic" {
  19         pub fn atomic_cxchg<T>(dst: *mut T, old: T, src: T) -> T;
  20         pub fn atomic_cxchg_acq<T>(dst: *mut T, old: T, src: T) -> T;
  21         pub fn atomic_cxchg_rel<T>(dst: *mut T, old: T, src: T) -> T;
  22
  23         pub fn atomic_load<T>(src: *const T) -> T;
  24         pub fn atomic_load_acq<T>(src: *const T) -> T;
  25
  26         pub fn atomic_store<T>(dst: *mut T, val: T);
  27         pub fn atomic_store_rel<T>(dst: *mut T, val: T);
  28
  29         pub fn atomic_xchg<T>(dst: *mut T, src: T) -> T;
  30         pub fn atomic_xchg_acq<T>(dst: *mut T, src: T) -> T;
  31         pub fn atomic_xchg_rel<T>(dst: *mut T, src: T) -> T;
  32
  33         pub fn atomic_xadd<T>(dst: *mut T, src: T) -> T;
  34         pub fn atomic_xadd_acq<T>(dst: *mut T, src: T) -> T;
  35         pub fn atomic_xadd_rel<T>(dst: *mut T, src: T) -> T;
  36
  37         pub fn atomic_xsub<T>(dst: *mut T, src: T) -> T;
  38         pub fn atomic_xsub_acq<T>(dst: *mut T, src: T) -> T;
  39         pub fn atomic_xsub_rel<T>(dst: *mut T, src: T) -> T;
  40     }
  41 }
  42
  43 pub fn main() {
  44     unsafe {
  45         let mut x: Box<_> = box 1;
  46
  47         assert_eq!(rusti::atomic_load(&*x), 1);
  48         *x = 5;
  49         assert_eq!(rusti::atomic_load_acq(&*x), 5);
  50
  51         rusti::atomic_store(&mut *x,3);
  52         assert_eq!(*x, 3);
  53         rusti::atomic_store_rel(&mut *x,1);
  54         assert_eq!(*x, 1);
  55
  56         assert_eq!(rusti::atomic_cxchg(&mut *x, 1, 2), 1);
  57         assert_eq!(*x, 2);
  58
  59         assert_eq!(rusti::atomic_cxchg_acq(&mut *x, 1, 3), 2);
  60         assert_eq!(*x, 2);
  61
  62         assert_eq!(rusti::atomic_cxchg_rel(&mut *x, 2, 1), 2);
  63         assert_eq!(*x, 1);
  64
  65         assert_eq!(rusti::atomic_xchg(&mut *x, 0), 1);
  66         assert_eq!(*x, 0);
  67
  68         assert_eq!(rusti::atomic_xchg_acq(&mut *x, 1), 0);
  69         assert_eq!(*x, 1);
  70
  71         assert_eq!(rusti::atomic_xchg_rel(&mut *x, 0), 1);
  72         assert_eq!(*x, 0);
  73
  74         assert_eq!(rusti::atomic_xadd(&mut *x, 1), 0);
  75         assert_eq!(rusti::atomic_xadd_acq(&mut *x, 1), 1);
  76         assert_eq!(rusti::atomic_xadd_rel(&mut *x, 1), 2);
  77         assert_eq!(*x, 3);
  78
  79         assert_eq!(rusti::atomic_xsub(&mut *x, 1), 3);
  80         assert_eq!(rusti::atomic_xsub_acq(&mut *x, 1), 2);
  81         assert_eq!(rusti::atomic_xsub_rel(&mut *x, 1), 1);
  82         assert_eq!(*x, 0);
  83     }
  84 }