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Re: [avr-gcc-list] Comma Operator in #define

From: Christian Vogel
Subject: Re: [avr-gcc-list] Comma Operator in #define
Date: Wed, 23 Jul 2003 11:45:13 +0200
User-agent: Mutt/

On Tue, Jul 22, 2003 at 02:15:36PM -0700, Keith Gudger wrote:
> #define set_clock(x) asm volatile("nop\n\t"::), (PORTB |= BIT3)

one very smart way of #defining multiple statements I got from the
linux-kernel is:

        #define MACRO(x) do { func1(x); func2(x); } while(0)

This way you can use MACRO almost as if it would be a normal
C-function. (see http://www.kernelnewbies.org/faq/)


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