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SEMGIVE releases a semaphore. If the semaphore was taken before, it is marked as a free semaphore and any task may take it by using the SEMTAKE command. If the semaphore was already free, its status does not change. If a task takes the semaphore using SEMTAKE, the semaphore may be released by the same task or by any task in the system (even from the command line).
Since Version 3.7.x
semGive(SEM1) ‘release the semaphore