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Overview of the filedescriptor subsystem
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Adrian Chadd <adrian@creative.net.au>
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$Id: fd-management.txt 6 2005-09-10 01:02:21Z nenolod $
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The filedescriptor list is managed through the routines in fdlist.c .
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fd_open() - tag an FD as "open" and active
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fd_close() - tag an FD as "closed" and close() the filedescriptor
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fd_note() - update the filedescriptor tag
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You can get the current list of open filedescriptors through /stats F as
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The FD list support is very alpha. There are a few lists defined:
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typedef enum fdlist_t {
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FDLIST_NONE Not on any list (ie close()d)
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FDLIST_SERVICE A service - listen() sockets, resolver, etc
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FDLIST_SERVER Server connections
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FDLIST_IDLECLIENT An idle client
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FDLIST_BUSYCLIENT A busy client
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FDLIST_MAX Used for bounds checking
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The idea is that the SERVICE sockets need polling frequently, the SERVER
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sockets also need polling frequently, BUSYCLIENT is for busy clients
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which need frequent polling (eg we're trying to write to them), and
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IDLECLIENT is for clients which we don't need to poll frequently.
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THIS hasn't been decided upon yet.
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doc/technical/fd-management.txt
