2021-08-25 19:46:29 +03:00
|
|
|
//go:build !go1.4
|
2017-02-20 18:39:36 +03:00
|
|
|
// +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))
|
|
|
|
|
}
|
