go-pulse/log/handler_go13.go
Felix Lange 8a134014b4
all: add go:build lines (#23468)
Generated by go1.17 fmt ./...
2021-08-25 18:46:29 +02:00

28 lines
529 B
Go

//go:build !go1.4
// +build !go1.4
package log
import (
"sync/atomic"
"unsafe"
)
// swapHandler wraps another handler that may be swapped out
// dynamically at runtime in a thread-safe fashion.
type swapHandler struct {
handler unsafe.Pointer
}
func (h *swapHandler) Log(r *Record) error {
return h.Get().Log(r)
}
func (h *swapHandler) Get() Handler {
return *(*Handler)(atomic.LoadPointer(&h.handler))
}
func (h *swapHandler) Swap(newHandler Handler) {
atomic.StorePointer(&h.handler, unsafe.Pointer(&newHandler))
}