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backend, logger: lock before reassigning defaultBackend #145

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backend, logger: lock before reassigning defaultBackend #145

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2 changes: 2 additions & 0 deletions backend.go
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Original file line number Diff line number Diff line change
Expand Up @@ -23,7 +23,9 @@ func SetBackend(backends ...Backend) LeveledBackend {
backend = MultiLogger(backends...)
}

lock.Lock()
defaultBackend = AddModuleLevel(backend)
lock.Unlock()
return defaultBackend
}

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19 changes: 11 additions & 8 deletions level.go
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Original file line number Diff line number Diff line change
Expand Up @@ -26,14 +26,17 @@ const (
DEBUG
)

var levelNames = []string{
"CRITICAL",
"ERROR",
"WARNING",
"NOTICE",
"INFO",
"DEBUG",
}
var (
lock sync.Mutex
levelNames = []string{
"CRITICAL",
"ERROR",
"WARNING",
"NOTICE",
"INFO",
"DEBUG",
}
)

// String returns the string representation of a logging level.
func (p Level) String() string {
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5 changes: 4 additions & 1 deletion logger.go
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Expand Up @@ -137,7 +137,10 @@ func Reset() {

// IsEnabledFor returns true if the logger is enabled for the given level.
func (l *Logger) IsEnabledFor(level Level) bool {
return defaultBackend.IsEnabledFor(level, l.Module)
lock.Lock()
enabled := defaultBackend.IsEnabledFor(level, l.Module)
defer lock.Unlock()
return enabled
}

func (l *Logger) log(lvl Level, format *string, args ...interface{}) {
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