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- // +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))
- }
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