66     }
67 
68     /**
69      * Maps a file descriptor to an index from 0 to {@code toIndex}.
70      * @implSpec The default implementation is good for Unix file descriptors.
71      */
72     int fdValToIndex(int fdVal, int toIndex) {
73         return fdVal & (toIndex - 1);
74     }
75 
76     /**
77      * Creates a Poller for read ops.
78      * @param subPoller true to create a sub-poller
79      */
80     abstract Poller readPoller(boolean subPoller) throws IOException;
81 
82     /**
83      * Creates a Poller for write ops.
84      * @param subPoller true to create a sub-poller
85      */
86     abstract Poller writePoller(boolean subPoller) throws IOException;
87 }

66     }
67 
68     /**
69      * Maps a file descriptor to an index from 0 to {@code toIndex}.
70      * @implSpec The default implementation is good for Unix file descriptors.
71      */
72     int fdValToIndex(int fdVal, int toIndex) {
73         return fdVal & (toIndex - 1);
74     }
75 
76     /**
77      * Creates a Poller for read ops.
78      * @param subPoller true to create a sub-poller
79      */
80     abstract Poller readPoller(boolean subPoller) throws IOException;
81 
82     /**
83      * Creates a Poller for write ops.
84      * @param subPoller true to create a sub-poller
85      */
86     abstract Poller writePoller( boolean subPoller) throws IOException;
87 }