Documentation ¶
Overview ¶
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 *val == old { *val = new return true } return false
Index ¶
- func AddInt32(val *int32, delta int32) (new int32)
- func AddInt64(val *int64, delta int64) (new int64)
- func AddUint32(val *uint32, delta uint32) (new uint32)
- func AddUint64(val *uint64, delta uint64) (new uint64)
- func AddUintptr(val *uintptr, delta uintptr) (new uintptr)
- func CompareAndSwapInt32(val *int32, old, new int32) (swapped bool)
- func CompareAndSwapInt64(val *int64, old, new int64) (swapped bool)
- func CompareAndSwapUint32(val *uint32, old, new uint32) (swapped bool)
- func CompareAndSwapUint64(val *uint64, old, new uint64) (swapped bool)
- func CompareAndSwapUintptr(val *uintptr, old, new uintptr) (swapped bool)
- Bugs
Constants ¶
This section is empty.
Variables ¶
This section is empty.
Functions ¶
func AddUintptr ¶
AddUintptr atomically adds delta to *val and returns the new value.
func CompareAndSwapInt32 ¶
CompareAndSwapInt32 executes the compare-and-swap operation for an int32 value.
func CompareAndSwapInt64 ¶
CompareAndSwapInt64 executes the compare-and-swap operation for an int64 value.
func CompareAndSwapUint32 ¶
CompareAndSwapUint32 executes the compare-and-swap operation for a uint32 value.
func CompareAndSwapUint64 ¶
CompareAndSwapUint64 executes the compare-and-swap operation for a uint64 value.
func CompareAndSwapUintptr ¶
CompareAndSwapUintptr executes the compare-and-swap operation for a uintptr value.
Types ¶
This section is empty.
Notes ¶
Bugs ¶
On ARM, the 64-bit functions use instructions unavailable before ARM 11.
On x86-32, the 64-bit functions use instructions unavailable before the Pentium.