102 lines
2.7 KiB
Rust
102 lines
2.7 KiB
Rust
// 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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//! Operations on managed box types
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use ptr::to_unsafe_ptr;
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#[cfg(not(test))] use cmp::{Eq, Ord};
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pub mod raw {
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use std::unstable::intrinsics::TyDesc;
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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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#[allow(missing_doc)]
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pub struct BoxHeaderRepr {
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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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#[allow(missing_doc)]
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pub struct BoxRepr {
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header: BoxHeaderRepr,
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data: u8
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}
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}
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/// Determine if two shared boxes point to the same object
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#[inline]
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pub fn ptr_eq<T>(a: @T, b: @T) -> bool {
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let (a_ptr, b_ptr): (*T, *T) = (to_unsafe_ptr(&*a), to_unsafe_ptr(&*b));
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a_ptr == b_ptr
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}
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/// Determine if two mutable shared boxes point to the same object
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#[inline]
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pub fn mut_ptr_eq<T>(a: @mut T, b: @mut T) -> bool {
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let (a_ptr, b_ptr): (*T, *T) = (to_unsafe_ptr(&*a), to_unsafe_ptr(&*b));
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a_ptr == b_ptr
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}
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#[cfg(not(test))]
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impl<T:Eq> Eq for @T {
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#[inline]
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fn eq(&self, other: &@T) -> bool { *(*self) == *(*other) }
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#[inline]
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fn ne(&self, other: &@T) -> bool { *(*self) != *(*other) }
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}
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#[cfg(not(test))]
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impl<T:Eq> Eq for @mut T {
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#[inline]
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fn eq(&self, other: &@mut T) -> bool { *(*self) == *(*other) }
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#[inline]
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fn ne(&self, other: &@mut T) -> bool { *(*self) != *(*other) }
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}
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#[cfg(not(test))]
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impl<T:Ord> Ord for @T {
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#[inline]
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fn lt(&self, other: &@T) -> bool { *(*self) < *(*other) }
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#[inline]
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fn le(&self, other: &@T) -> bool { *(*self) <= *(*other) }
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#[inline]
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fn ge(&self, other: &@T) -> bool { *(*self) >= *(*other) }
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#[inline]
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fn gt(&self, other: &@T) -> bool { *(*self) > *(*other) }
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}
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#[cfg(not(test))]
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impl<T:Ord> Ord for @mut T {
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#[inline]
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fn lt(&self, other: &@mut T) -> bool { *(*self) < *(*other) }
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#[inline]
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fn le(&self, other: &@mut T) -> bool { *(*self) <= *(*other) }
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#[inline]
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fn ge(&self, other: &@mut T) -> bool { *(*self) >= *(*other) }
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#[inline]
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fn gt(&self, other: &@mut T) -> bool { *(*self) > *(*other) }
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}
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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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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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}
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