29 lines
497 B
Go
29 lines
497 B
Go
package log
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import (
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"io"
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"sync"
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)
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type WriteLocker interface {
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io.Writer
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sync.Locker
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}
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type writeLock struct {
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sync.Mutex
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io.Writer
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}
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// Lock wraps a WriteSyncer in a mutex to make it safe for concurrent use. In
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// particular, *os.Files must be locked before use.
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//
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// If w is already a WriteLocker, it will be returned as is.
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func Lock(w io.Writer) WriteLocker {
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if wl, ok := w.(WriteLocker); ok {
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// no need to layer on another lock
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return wl
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}
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return &writeLock{Writer: w}
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}
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