Date: Mon, 26 Jun 2000 23:32:03 +0200 From: Adrian Chadd <adrian@freebsd.org> To: Alfred Perlstein <bright@wintelcom.net> Cc: arch@freebsd.org Subject: Re: dynamic filetypes. please comment. Message-ID: <20000626233203.Y36017@zoe.bastard.co.uk> In-Reply-To: <20000626142428.A275@fw.wintelcom.net>; from bright@wintelcom.net on Mon, Jun 26, 2000 at 02:24:28PM -0700 References: <20000626142428.A275@fw.wintelcom.net>
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On Mon, Jun 26, 2000, Alfred Perlstein wrote: > In order to have a kld add a new filetype (DTYPE_VNODE, DTYPE_PIPE, > etc.) it needs to generate a unique number. > > My inclination is to just add a DTYPE_MAX(*) and provide a function > for the kld initializers to call "short getnewdtype(void)" which > returns the next available number. This does limit us to about > 32764 module driver loads before getnewdtype will return -1 (error). > > This idea leads us to a generic api for seqeunce number generation > that we can use when a subsystem needs an increasing unique number, > the api would look something like: > > (void)sequence_register("filetypes", starting_number); > mynum = sequence_next("filetypes"); /* to be used for f_type */ The debug gods might like: mynum = sequence_next("filetypes", "DTYPE_FOO", "A foo-type file"); ? Adrian -- Adrian Chadd Build a man a fire, and he's warm for the <adrian@FreeBSD.org> rest of the evening. Set a man on fire and he's warm for the rest of his life. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-arch" in the body of the message
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