From 11ecfb8884b7c4def0863a57868a6b9fa1b63ae5 Mon Sep 17 00:00:00 2001
From: Peter Hutterer <peter.hutterer@who-t.net>
Date: Thu, 10 May 2012 11:48:05 +1000
Subject: [PATCH] include: add BUG_RETURN_* macros

Helper functions to avoid things like

if (foo) {
    BUG_WARN(foo);
    return 1;
}

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Chase Douglas <chase.douglas@canonical.com>
Reviewed-by: Alan Coopersmith <alan.coopersmith@oracle.com>
---
 include/misc.h | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/include/misc.h b/include/misc.h
index 41c13332a..fea74b86c 100644
--- a/include/misc.h
+++ b/include/misc.h
@@ -381,4 +381,16 @@ extern _X_EXPORT unsigned long serverGeneration;
 
 #define BUG_WARN(cond)  __BUG_WARN_MSG(cond, 0, NULL)
 
+#define BUG_RETURN(cond) \
+        do { if (cond) { __BUG_WARN_MSG(cond, 0, NULL); return; } } while(0)
+
+#define BUG_RETURN_MSG(cond, ...) \
+        do { if (cond) { __BUG_WARN_MSG(cond, 1, __VA_ARGS__); return; } } while(0)
+
+#define BUG_RETURN_VAL(cond, val) \
+        do { if (cond) { __BUG_WARN_MSG(cond, 0, NULL); return (val); } } while(0)
+
+#define BUG_RETURN_VAL_MSG(cond, val, ...) \
+        do { if (cond) { __BUG_WARN_MSG(cond, 1, __VA_ARGS__); return (val); } } while(0)
+
 #endif                          /* MISC_H */