64 lines
1.5 KiB
Go
64 lines
1.5 KiB
Go
package logger
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import (
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"io"
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"log"
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"sync/atomic"
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)
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// LogSystem is implemented by log output devices.
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// All methods can be called concurrently from multiple goroutines.
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type LogSystem interface {
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GetLogLevel() LogLevel
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SetLogLevel(i LogLevel)
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LogPrint(LogLevel, string)
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}
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// NewStdLogSystem creates a LogSystem that prints to the given writer.
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// The flag values are defined package log.
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func NewStdLogSystem(writer io.Writer, flags int, level LogLevel) LogSystem {
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logger := log.New(writer, "", flags)
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return &stdLogSystem{logger, uint32(level)}
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}
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type stdLogSystem struct {
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logger *log.Logger
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level uint32
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}
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func (t *stdLogSystem) LogPrint(level LogLevel, msg string) {
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t.logger.Print(msg)
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}
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func (t *stdLogSystem) SetLogLevel(i LogLevel) {
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atomic.StoreUint32(&t.level, uint32(i))
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}
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func (t *stdLogSystem) GetLogLevel() LogLevel {
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return LogLevel(atomic.LoadUint32(&t.level))
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}
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// NewRawLogSystem creates a LogSystem that prints to the given writer without
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// adding extra information. Suitable for preformatted output
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func NewRawLogSystem(writer io.Writer, flags int, level LogLevel) LogSystem {
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logger := log.New(writer, "", 0)
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return &rawLogSystem{logger, uint32(level)}
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}
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type rawLogSystem struct {
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logger *log.Logger
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level uint32
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}
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func (t *rawLogSystem) LogPrint(level LogLevel, msg string) {
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t.logger.Print(msg)
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}
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func (t *rawLogSystem) SetLogLevel(i LogLevel) {
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atomic.StoreUint32(&t.level, uint32(i))
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}
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func (t *rawLogSystem) GetLogLevel() LogLevel {
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return LogLevel(atomic.LoadUint32(&t.level))
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}
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