Denso Power Net Terminal BHT-103 Dokumentacja Pobierz pdf (Strona 462)

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’Initialize socket identifier set

’<----- Equivalent to BSD4.4 socket API FD_ZERO macro

CALL "SOCKET.FN3" .fcFDZERO R.SOCKSET$ ’Initialize read socket identifier set

CALL "SOCKET.FN3" .fcFDZERO W.SOCKSET$ ’Initialize write socket identifier

’set

CALL "SOCKET.FN3" .fcFDZERO E.SOCKSET$ ’Initialize exception socket

’identifier set

’Add socket identifier to read socket identifier set

’<----- Equivalent to BSD4.4 socket API FD_SET macro

CALL "SOCKET.FN3" .fcFDSET SOCKFD%, R.SOCKSET$

’Wait for changes in socket identifier set (read condition)

’< ----- Equivalent to BSD4.4 socket API select () function

MAXFD% = SOCKFD% +1 ’Specify number of socket identifiers

TIMEOUT = 360 ’Specify 6-minute (360-second) timeout

CALL "SOCKET.FN3" .fcSelect MAXFD%, R.SOCKSET$, W.SOCKSET$, E.SOCKSET$,

TIMEOUT, RESULT%

IF RESULT% = 0 THEN ’Timeout occurred

’Processing for timeout

END IF

’Get socket identifier status from read socket identifier set

’< ----- Equivalent to BSD4.4 socket API FD_ISSET macro

CALL "SOCKET.FN3" .fcFDISSET SOCKFD%, R.SOCKSET$, FDISSET%

IF FDISSET% = 0 THEN ’No receive data

’Processing for no receive data

END IF

’Receive data < ----- Equivalent to BSD4.4 socket API recv () function

RECVLEN% = 255

RECVMODE% = 0

CALL "SOCKET.FN3" .fcRecv SOCKFD%, RECVBUFF$, RECVLEN%, RECVMODE%, RECVSIZE%

’Close socket < ----- Equivalent to BSD4.4 socket API close () function

CALL "SOCKET.FN3" .fcClose SOCKFD%

RETURN

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