From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:45498) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aoD8z-0003en-Eh for qemu-devel@nongnu.org; Thu, 07 Apr 2016 12:51:00 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1aoD8y-0001aQ-Fk for qemu-devel@nongnu.org; Thu, 07 Apr 2016 12:50:57 -0400 Received: from mx1.redhat.com ([209.132.183.28]:40952) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aoD8y-0001aK-Af for qemu-devel@nongnu.org; Thu, 07 Apr 2016 12:50:56 -0400 Received: from int-mx11.intmail.prod.int.phx2.redhat.com (int-mx11.intmail.prod.int.phx2.redhat.com [10.5.11.24]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id E22EF7F6B0 for ; Thu, 7 Apr 2016 16:50:55 +0000 (UTC) From: Paolo Bonzini Date: Thu, 7 Apr 2016 18:50:35 +0200 Message-Id: <1460047845-14488-6-git-send-email-pbonzini@redhat.com> In-Reply-To: <1460047845-14488-1-git-send-email-pbonzini@redhat.com> References: <1460047845-14488-1-git-send-email-pbonzini@redhat.com> Subject: [Qemu-devel] [PULL 05/15] nbd: Avoid bitrot in TRACE() usage List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org From: Eric Blake The compiler is smart enough to optimize out 'if (0)', but won't type-check our printfs if they are hidden behind #if. Signed-off-by: Eric Blake Message-Id: <1459913704-19949-3-git-send-email-eblake@redhat.com> Signed-off-by: Paolo Bonzini --- nbd/nbd-internal.h | 15 +++++++++------ 1 file changed, 9 insertions(+), 6 deletions(-) diff --git a/nbd/nbd-internal.h b/nbd/nbd-internal.h index d09b4ee..3791535 100644 --- a/nbd/nbd-internal.h +++ b/nbd/nbd-internal.h @@ -33,18 +33,21 @@ /* #define DEBUG_NBD */ #ifdef DEBUG_NBD -#define TRACE(msg, ...) do { \ - LOG(msg, ## __VA_ARGS__); \ -} while(0) +#define DEBUG_NBD_PRINT 1 #else -#define TRACE(msg, ...) \ - do { } while (0) +#define DEBUG_NBD_PRINT 0 #endif +#define TRACE(msg, ...) do { \ + if (DEBUG_NBD_PRINT) { \ + LOG(msg, ## __VA_ARGS__); \ + } \ +} while (0) + #define LOG(msg, ...) do { \ fprintf(stderr, "%s:%s():L%d: " msg "\n", \ __FILE__, __FUNCTION__, __LINE__, ## __VA_ARGS__); \ -} while(0) +} while (0) /* This is all part of the "official" NBD API. * -- 2.5.5