2012-12-03 18:48:01 -06:00
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// Copyright 2012 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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2012-09-20 17:33:52 -05:00
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//! Operations on managed box types
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2012-03-06 21:09:32 -06:00
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2012-12-23 16:41:37 -06:00
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use ptr;
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2012-08-27 18:26:35 -05:00
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2013-02-26 23:10:03 -06:00
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#[cfg(notest)] use cmp::{Eq, Ord};
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2013-02-20 17:02:21 -06:00
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2012-09-26 17:24:31 -05:00
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pub mod raw {
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2013-03-26 21:53:33 -05:00
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use intrinsic::TyDesc;
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2013-02-20 17:02:21 -06:00
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2013-03-22 16:00:15 -05:00
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pub static RC_EXCHANGE_UNIQUE : uint = (-1) as uint;
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pub static RC_MANAGED_UNIQUE : uint = (-2) as uint;
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pub static RC_IMMORTAL : uint = 0x77777777;
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2013-02-20 17:02:21 -06:00
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2012-09-26 17:24:31 -05:00
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pub struct BoxHeaderRepr {
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2012-09-14 21:09:38 -05:00
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ref_count: uint,
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type_desc: *TyDesc,
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prev: *BoxRepr,
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next: *BoxRepr,
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}
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2012-09-26 17:24:31 -05:00
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pub struct BoxRepr {
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2012-09-14 21:09:38 -05:00
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header: BoxHeaderRepr,
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data: u8
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}
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}
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2011-12-13 18:25:51 -06:00
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2013-01-13 08:37:30 -06:00
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#[inline(always)]
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2013-03-21 23:20:48 -05:00
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pub fn ptr_eq<T>(a: @T, b: @T) -> bool {
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2012-07-04 16:53:12 -05:00
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//! Determine if two shared boxes point to the same object
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2012-10-01 14:47:02 -05:00
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unsafe { ptr::addr_of(&(*a)) == ptr::addr_of(&(*b)) }
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2011-12-13 18:25:51 -06:00
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}
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2012-01-17 19:28:21 -06:00
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2013-02-04 16:02:01 -06:00
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#[inline(always)]
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2013-03-21 23:20:48 -05:00
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pub fn mut_ptr_eq<T>(a: @mut T, b: @mut T) -> bool {
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2013-02-04 16:02:01 -06:00
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//! Determine if two mutable shared boxes point to the same object
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unsafe { ptr::addr_of(&(*a)) == ptr::addr_of(&(*b)) }
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}
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2012-11-30 02:47:45 -06:00
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#[cfg(notest)]
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2013-03-21 17:39:17 -05:00
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impl<T:Eq> Eq for @T {
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2013-01-13 08:37:30 -06:00
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#[inline(always)]
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2013-03-21 23:20:48 -05:00
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fn eq(&self, other: &@T) -> bool { *(*self) == *(*other) }
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2013-01-13 08:37:30 -06:00
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#[inline(always)]
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2013-03-21 23:20:48 -05:00
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fn ne(&self, other: &@T) -> bool { *(*self) != *(*other) }
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2012-09-19 20:00:26 -05:00
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}
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2012-08-27 18:26:35 -05:00
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2012-11-30 02:47:45 -06:00
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#[cfg(notest)]
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2013-03-21 17:39:17 -05:00
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impl<T:Eq> Eq for @mut T {
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2013-01-13 08:37:30 -06:00
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#[inline(always)]
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2013-03-21 23:20:48 -05:00
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fn eq(&self, other: &@mut T) -> bool { *(*self) == *(*other) }
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2013-01-13 08:37:30 -06:00
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#[inline(always)]
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2013-03-21 23:20:48 -05:00
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fn ne(&self, other: &@mut T) -> bool { *(*self) != *(*other) }
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2013-03-21 17:39:17 -05:00
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}
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#[cfg(notest)]
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impl<T:Ord> Ord for @T {
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#[inline(always)]
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2013-03-21 23:20:48 -05:00
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fn lt(&self, other: &@T) -> bool { *(*self) < *(*other) }
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2013-03-21 17:39:17 -05:00
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#[inline(always)]
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2013-03-21 23:20:48 -05:00
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fn le(&self, other: &@T) -> bool { *(*self) <= *(*other) }
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2013-03-21 17:39:17 -05:00
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#[inline(always)]
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2013-03-21 23:20:48 -05:00
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fn ge(&self, other: &@T) -> bool { *(*self) >= *(*other) }
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2013-03-21 17:39:17 -05:00
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#[inline(always)]
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2013-03-21 23:20:48 -05:00
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fn gt(&self, other: &@T) -> bool { *(*self) > *(*other) }
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2013-03-21 17:39:17 -05:00
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}
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#[cfg(notest)]
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impl<T:Ord> Ord for @mut T {
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#[inline(always)]
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2013-03-21 23:20:48 -05:00
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fn lt(&self, other: &@mut T) -> bool { *(*self) < *(*other) }
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2013-03-21 17:39:17 -05:00
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#[inline(always)]
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2013-03-21 23:20:48 -05:00
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fn le(&self, other: &@mut T) -> bool { *(*self) <= *(*other) }
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2013-01-13 08:37:30 -06:00
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#[inline(always)]
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2013-03-21 23:20:48 -05:00
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fn ge(&self, other: &@mut T) -> bool { *(*self) >= *(*other) }
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2013-01-13 08:37:30 -06:00
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#[inline(always)]
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2013-03-21 23:20:48 -05:00
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fn gt(&self, other: &@mut T) -> bool { *(*self) > *(*other) }
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2012-09-19 20:00:26 -05:00
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}
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2012-08-27 18:26:35 -05:00
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2012-01-17 19:28:21 -06:00
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#[test]
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fn test() {
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let x = @3;
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let y = @3;
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2013-03-28 20:39:09 -05:00
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assert!((ptr_eq::<int>(x, x)));
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assert!((ptr_eq::<int>(y, y)));
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assert!((!ptr_eq::<int>(x, y)));
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assert!((!ptr_eq::<int>(y, x)));
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2012-01-17 19:28:21 -06:00
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}
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