[PATCH] include: add BUG_RETURN_* macros

[Peter Hutterer]

Helper functions to avoid things like

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

Signed-off-by: Peter Hutterer <peter.hutterer at who-t.net>
---
 include/misc.h |    9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/include/misc.h b/include/misc.h
index 41c1333..a57efa0 100644
--- a/include/misc.h
+++ b/include/misc.h
@@ -380,5 +380,14 @@ extern _X_EXPORT unsigned long serverGeneration;
           __BUG_WARN_MSG(cond, 1, __VA_ARGS__)
 
 #define BUG_WARN(cond)  __BUG_WARN_MSG(cond, 0, NULL)
+#define BUG_RETURN(cond) \
+        do { __BUG_WARN_MSG(cond, 0, NULL); return; } while(0)
+#define BUG_RETURN_MSG(cond, ...) \
+        do { __BUG_WARN_MSG(cond, 1, __VA_ARGS__); return; } while(0)
 
+#define BUG_RETURN_VAL(cond, val) \
+        do { __BUG_WARN_MSG(cond, 0, NULL); return (val); } while(0)
+
+#define BUG_RETURN_VAL_MSG(cond, val, ...) \
+        do { __BUG_WARN_MSG(cond, 1, __VA_ARGS__); return (val); } while(0)
 #endif                          /* MISC_H */
-- 
1.7.10.1