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pr.book Page 22 Thursday, January 28, 1999 9:18 AM Standard pSOSystem Character I/O Interface pSOSystem Programmer’s Reference The useCount field specifies the current value of in use counter associated with the channel. The type field can have a value of: ■ MAPIO_DEVICE ■ MAPIO_FILE ■ MAPIO_SOCKET ■ MAPIO_CUSTOM The type field value depends on whether the I/O is currently redirected to a device, file, socket, or application defined module, respectively. Accordingly, the target field is set to the device number, file handle, socket descriptor, or the module ID of an application- specific module to which the I/O on this channel is currently redirected. If the I/O is not currently redirected, the type field is set to MAPIO_NONE, and the values in other fields are undefined. 4-22 pSEUDO Driver
