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atomic_int32_pair.go
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atomic_int32_pair.go
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package fast
import (
"sync/atomic"
"unsafe"
)
type AtomicInt32Pair struct {
v int64
}
type atomicInt32Pair struct {
a, b int32
}
//go:inline
func toInt32(v int64) (int32, int32) {
ab := *(*atomicInt32Pair)(unsafe.Pointer(&v))
return ab.a, ab.b
}
//go:inline
func toInt64(a, b int32) int64 {
return *(*int64)(unsafe.Pointer(&atomicInt32Pair{
a: a,
b: b,
}))
}
// Load atomically loads and returns the value stored in x.
func (x *AtomicInt32Pair) Load() (int32, int32) {
return toInt32(atomic.LoadInt64(&x.v))
}
// Store atomically stores val into x.
func (x *AtomicInt32Pair) Store(a, b int32) {
atomic.StoreInt64(&x.v, toInt64(a, b))
}
// Swap atomically stores new into x and returns the previous value.
func (x *AtomicInt32Pair) Swap(newA, newB int32) (oldA, oldB int32) {
return toInt32(atomic.SwapInt64(&x.v, toInt64(newA, newB)))
}
// CompareAndSwap executes the compare-and-swap operation for x.
func (x *AtomicInt32Pair) CompareAndSwap(oldA, oldB, newA, newB int32) (swapped bool) {
return atomic.CompareAndSwapInt64(&x.v, toInt64(oldA, oldB), toInt64(newA, newB))
}
// Add atomically adds delta to x and returns the new value.
func (x *AtomicInt32Pair) Add(deltaA, deltaB int32) (newA, newB int32) {
return toInt32(atomic.AddInt64(&x.v, toInt64(deltaA, deltaB)))
}