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include: add BUG_WARN_MSG for custom error message on bug condition

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__BUG_WARN_MSG is a simple helper to enable call with and without varargs. I
couldn't find a way to otherwise do this without getting gcc warnings.

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Chase Douglas <chase.douglas@canonical.com>
This commit is contained in:
Peter Hutterer 2011-12-05 14:02:51 +10:00
parent 4fc797f375
commit 2abe83df68
1 changed files with 8 additions and 1 deletions
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9
include/misc.h
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@ -359,11 +359,18 @@ typedef struct _CharInfo *CharInfoPtr; /* also in fonts/include/font.h */
extern _X_EXPORT unsigned long globalSerialNumber;
extern _X_EXPORT unsigned long serverGeneration;
#define BUG_WARN(cond) \
/* Don't use this directly, use BUG_WARN or BUG_WARN_MSG instead */
#define __BUG_WARN_MSG(cond, with_msg, ...) \
do { if (cond) { \
ErrorF("BUG: triggered 'if (" #cond ")'\nBUG: %s:%d in %s()\n", \
__FILE__, __LINE__, __func__); \
if (with_msg) ErrorF(__VA_ARGS__); \
xorg_backtrace(); \
} } while(0)
#define BUG_WARN_MSG(cond, msg, ...) \
__BUG_WARN_MSG(cond, 1, msg, __VA_ARGS__)
#define BUG_WARN(cond) __BUG_WARN_MSG(cond, 0, NULL)
#endif /* MISC_H */