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  1. JDK
  2. JDK-8034801

AIX: (ch) Fix synchronization issue in AixPollPort.java

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    • Icon: Bug Bug
    • Resolution: Fixed
    • Icon: P4 P4
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    • core-libs
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    • b04
    • aix

        On AIX we use the AIXPollPort class to wrap the native pollset functionality.

        AIXPollPort is based on the Linux EPollPort class. But on AIX there's an extra difficulty - we can not modify (with pollset_ctl()) and query (with pollset_poll()) a pollset concurrently (like this is possible on Linux with epoll_ctl() and epoll_wait()).

        We have therefore synchronized calls to pollset_ctl() and pollset_poll() by using an extra control queue which handles these calls sequentially.

        This implementation has an error which can lead to a deadlock if we have a pending pollset_ctl() event in the control queue while the corresponding pollset is already empty.

              simonis Volker Simonis
              simonis Volker Simonis
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