Date: Tue, 17 Feb 2009 09:31:12 -0500 From: John Baldwin <jhb@freebsd.org> To: freebsd-hackers@freebsd.org Cc: Roman Divacky <rdivacky@freebsd.org>, hackers@freebsd.org, Ryan Stone <rysto32@gmail.com> Subject: Re: TUNABLE_INT question Message-ID: <200902170931.12983.jhb@freebsd.org> In-Reply-To: <20090213221607.GA25161@freebsd.org> References: <20090213183229.GA94272@freebsd.org> <bc2d970902131255h1a0965d8g4e8c54a10436ee22@mail.gmail.com> <20090213221607.GA25161@freebsd.org>
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On Friday 13 February 2009 5:16:07 pm Roman Divacky wrote: > On Fri, Feb 13, 2009 at 03:55:44PM -0500, Ryan Stone wrote: > > __FILE__ is a string so you can't concat that with anything to produce an > > identifier. In any case, the variable is static so there can't be any > > collision problems with other files. > > I was talking about the SYSINIT parameter. thats a section in a .o > file, and I am getting collisions there... Hmm, are you doing something like this: #define FOO(string) \ TUNABLE_INT(string ## ".bar", &bar); \ TUNABLE_INT(string ## ".foo", &foo); \ FOO(baz) That would collide as both of the TUNABLE_INT() invocations would have the same __LINE__ (the line number of the 'FOO(baz)'). -- John Baldwin
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