lukegluke commented on pull request #1370:
URL: https://github.com/apache/incubator-nuttx/pull/1370#issuecomment-653917852


   Thank for you work, Alan! But it looks like a made a mistake :(
   Should be
   `sval <= 0`
   right? 
   
   `If 'sem' is locked, the value return by nxsem_get_value() will either be 
zero or a negative number whose absolute value represents the number of tasks 
waiting for the semaphore.`


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