| Colin Cross | 7bb052a | 2015-02-03 12:59:37 -0800 | [diff] [blame^] | 1 | // Copyright 2012 The Go Authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style |
| 3 | // license that can be found in the LICENSE file. |
| 4 | |
| 5 | package atomic |
| 6 | |
| 7 | func loadUint64(addr *uint64) (val uint64) { |
| 8 | for { |
| 9 | val = *addr |
| 10 | if CompareAndSwapUint64(addr, val, val) { |
| 11 | break |
| 12 | } |
| 13 | } |
| 14 | return |
| 15 | } |
| 16 | |
| 17 | func storeUint64(addr *uint64, val uint64) { |
| 18 | for { |
| 19 | old := *addr |
| 20 | if CompareAndSwapUint64(addr, old, val) { |
| 21 | break |
| 22 | } |
| 23 | } |
| 24 | return |
| 25 | } |
| 26 | |
| 27 | func addUint64(val *uint64, delta uint64) (new uint64) { |
| 28 | for { |
| 29 | old := *val |
| 30 | new = old + delta |
| 31 | if CompareAndSwapUint64(val, old, new) { |
| 32 | break |
| 33 | } |
| 34 | } |
| 35 | return |
| 36 | } |
| 37 | |
| 38 | func swapUint64(addr *uint64, new uint64) (old uint64) { |
| 39 | for { |
| 40 | old = *addr |
| 41 | if CompareAndSwapUint64(addr, old, new) { |
| 42 | break |
| 43 | } |
| 44 | } |
| 45 | return |
| 46 | } |
| 47 | |
| 48 | // Additional ARM-specific assembly routines. |
| 49 | // Declaration here to give assembly routines correct stack maps for arguments. |
| 50 | func armCompareAndSwapUint32(addr *uint32, old, new uint32) (swapped bool) |
| 51 | func armCompareAndSwapUint64(addr *uint64, old, new uint64) (swapped bool) |
| 52 | func generalCAS64(addr *uint64, old, new uint64) (swapped bool) |
| 53 | func armAddUint32(addr *uint32, delta uint32) (new uint32) |
| 54 | func armAddUint64(addr *uint64, delta uint64) (new uint64) |
| 55 | func armSwapUint32(addr *uint32, new uint32) (old uint32) |
| 56 | func armSwapUint64(addr *uint64, new uint64) (old uint64) |
| 57 | func armLoadUint64(addr *uint64) (val uint64) |
| 58 | func armStoreUint64(addr *uint64, val uint64) |