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Guile Reference Manual

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27.10.1.4 The rw_active variable

The rw_active variable in the port is only used if rw_random is set. It's defined as an enum with the following values:

SCM_PORT_READ
the read buffer may have unread data.

SCM_PORT_WRITE
the write buffer may have unwritten data.

SCM_PORT_NEITHER
neither the write nor the read buffer has data.


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