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pol_sem
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Acquire semaphore resource (polling).
MOV A, #semid
CALL !!_pol_sem
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ID semid;
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ID number of the semaphore from which resource is acquired.
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This service call acquires a resource from the semaphore specified by parameter
semid (subtracts 0x1 from the semaphore counter).
If a resource could not be acquired from the target semaphore (semaphore counter is set to 0x0) when this service call is issued, the counter manipulation processing is not performed but "E_TMOUT" is returned.