[rustc.git] / src / librustc_back / abi.rs

// Copyright 2012 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.

pub const BOX_FIELD_DROP_GLUE: usize = 1;
pub const BOX_FIELD_BODY: usize = 4;

/// The first half of a fat pointer.
/// - For a closure, this is the code address.
/// - For an object or trait instance, this is the address of the box.
/// - For a slice, this is the base address.
pub const FAT_PTR_ADDR: usize = 0;

/// The second half of a fat pointer.
/// - For a closure, this is the address of the environment.
/// - For an object or trait instance, this is the address of the vtable.
/// - For a slice, this is the length.
pub const FAT_PTR_EXTRA: usize = 1;
Commit	Line	Data
1a4d82fc JJ	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
c34b1796 AL	11	pub const BOX_FIELD_DROP_GLUE: usize = 1;
c34b1796 AL	12	pub const BOX_FIELD_BODY: usize = 4;
1a4d82fc JJ	13
	14	/// The first half of a fat pointer.
	15	/// - For a closure, this is the code address.
	16	/// - For an object or trait instance, this is the address of the box.
	17	/// - For a slice, this is the base address.
c34b1796	18	pub const FAT_PTR_ADDR: usize = 0;
1a4d82fc JJ	19
	20	/// The second half of a fat pointer.
	21	/// - For a closure, this is the address of the environment.
	22	/// - For an object or trait instance, this is the address of the vtable.
	23	/// - For a slice, this is the length.
c34b1796	24	pub const FAT_PTR_EXTRA: usize = 1;