加锁解决同时读串口时报的资源不可用和超时报错

zhangqian

2023-11-06 fecd8ff508b33715cbe24ca892fc19a2d1ad1ef5

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package constvar
 
import (
    "github.com/songzhibin97/gkit/cache/local_cache"
    "golang.org/x/sync/singleflight"
)
 
var (
    BlackCache  local_cache.Cache
    SingleGroup = &singleflight.Group{}
)