[GitHub] [incubator-nuttx] patacongo commented on issue #2787: Use of Semaphores in KERNEL mode

[GitBox <gi...@apache.org>]

patacongo commented on issue #2787:
URL: https://github.com/apache/incubator-nuttx/issues/2787#issuecomment-772102603


   Other OSs do not use semaphores to signal between the OS and applications.  That is a behavior unique to NuttX.  But how would this handled in other OSs?  Most likely via the second parameter to the `sem_init()` call:
   
       If the pshared argument has a non-zero value, then the semaphore is shared between processes; in this case, any
       process that can access the semaphore sem can use sem for performing sem_wait(), sem_trywait(), sem_post(),
       and sem_destroy() operations.
   
   The `pshared` argument is currently ignored in NuttX.
   


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