diff options
Diffstat (limited to 'gcc-4.8.1/libgo/go/sync/atomic/doc.go')
| -rw-r--r-- | gcc-4.8.1/libgo/go/sync/atomic/doc.go | 120 |
1 files changed, 0 insertions, 120 deletions
diff --git a/gcc-4.8.1/libgo/go/sync/atomic/doc.go b/gcc-4.8.1/libgo/go/sync/atomic/doc.go deleted file mode 100644 index 27a12c984..000000000 --- a/gcc-4.8.1/libgo/go/sync/atomic/doc.go +++ /dev/null @@ -1,120 +0,0 @@ -// Copyright 2011 The Go Authors. All rights reserved. -// Use of this source code is governed by a BSD-style -// license that can be found in the LICENSE file. - -// +build !race - -// Package atomic provides low-level atomic memory primitives -// useful for implementing synchronization algorithms. -// -// These functions require great care to be used correctly. -// Except for special, low-level applications, synchronization is better -// done with channels or the facilities of the sync package. -// Share memory by communicating; -// don't communicate by sharing memory. -// -// The compare-and-swap operation, implemented by the CompareAndSwapT -// functions, is the atomic equivalent of: -// -// if *addr == old { -// *addr = new -// return true -// } -// return false -// -// The add operation, implemented by the AddT functions, is the atomic -// equivalent of: -// -// *addr += delta -// return *addr -// -// The load and store operations, implemented by the LoadT and StoreT -// functions, are the atomic equivalents of "return *addr" and -// "*addr = val". -// -package atomic - -import ( - "unsafe" -) - -// BUG(rsc): On x86-32, the 64-bit functions use instructions unavailable before the Pentium MMX. -// -// On both ARM and x86-32, it is the caller's responsibility to arrange for 64-bit -// alignment of 64-bit words accessed atomically. The first word in a global -// variable or in an allocated struct or slice can be relied upon to be -// 64-bit aligned. - -// CompareAndSwapInt32 executes the compare-and-swap operation for an int32 value. -func CompareAndSwapInt32(addr *int32, old, new int32) (swapped bool) - -// CompareAndSwapInt64 executes the compare-and-swap operation for an int64 value. -func CompareAndSwapInt64(addr *int64, old, new int64) (swapped bool) - -// CompareAndSwapUint32 executes the compare-and-swap operation for a uint32 value. -func CompareAndSwapUint32(addr *uint32, old, new uint32) (swapped bool) - -// CompareAndSwapUint64 executes the compare-and-swap operation for a uint64 value. -func CompareAndSwapUint64(addr *uint64, old, new uint64) (swapped bool) - -// CompareAndSwapUintptr executes the compare-and-swap operation for a uintptr value. -func CompareAndSwapUintptr(addr *uintptr, old, new uintptr) (swapped bool) - -// CompareAndSwapPointer executes the compare-and-swap operation for a unsafe.Pointer value. -func CompareAndSwapPointer(addr *unsafe.Pointer, old, new unsafe.Pointer) (swapped bool) - -// AddInt32 atomically adds delta to *addr and returns the new value. -func AddInt32(addr *int32, delta int32) (new int32) - -// AddUint32 atomically adds delta to *addr and returns the new value. -func AddUint32(addr *uint32, delta uint32) (new uint32) - -// AddInt64 atomically adds delta to *addr and returns the new value. -func AddInt64(addr *int64, delta int64) (new int64) - -// AddUint64 atomically adds delta to *addr and returns the new value. -func AddUint64(addr *uint64, delta uint64) (new uint64) - -// AddUintptr atomically adds delta to *addr and returns the new value. -func AddUintptr(addr *uintptr, delta uintptr) (new uintptr) - -// LoadInt32 atomically loads *addr. -func LoadInt32(addr *int32) (val int32) - -// LoadInt64 atomically loads *addr. -func LoadInt64(addr *int64) (val int64) - -// LoadUint32 atomically loads *addr. -func LoadUint32(addr *uint32) (val uint32) - -// LoadUint64 atomically loads *addr. -func LoadUint64(addr *uint64) (val uint64) - -// LoadUintptr atomically loads *addr. -func LoadUintptr(addr *uintptr) (val uintptr) - -// LoadPointer atomically loads *addr. -func LoadPointer(addr *unsafe.Pointer) (val unsafe.Pointer) - -// StoreInt32 atomically stores val into *addr. -func StoreInt32(addr *int32, val int32) - -// StoreInt64 atomically stores val into *addr. -func StoreInt64(addr *int64, val int64) - -// StoreUint32 atomically stores val into *addr. -func StoreUint32(addr *uint32, val uint32) - -// StoreUint64 atomically stores val into *addr. -func StoreUint64(addr *uint64, val uint64) - -// StoreUintptr atomically stores val into *addr. -func StoreUintptr(addr *uintptr, val uintptr) - -// StorePointer atomically stores val into *addr. -func StorePointer(addr *unsafe.Pointer, val unsafe.Pointer) - -// Helper for ARM. Linker will discard on other systems -func panic64() { - panic("sync/atomic: broken 64-bit atomic operations (buggy QEMU)") -} |