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