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makes WF_CONTAINER_OF use typeof, if available

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This commit is contained in:
Falk Werner 2019-04-18 19:21:07 +02:00
parent 3a7c064af7
commit c14ad18ca8
1 changed files with 8 additions and 0 deletions
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8
lib/webfuse/core/container_of.h
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@ -7,7 +7,15 @@
#include <cstddef>
#endif
#ifdef __GNUC__
#define WF_CONTAINER_OF(pointer, type, member) \
({ \
const typeof( ((type *)0)->member ) * __member = (pointer); \
(type *)( (char *)__member - offsetof(type, member) ); \
})
#else
#define WF_CONTAINER_OF(pointer, type, member) \
(type *) (((char *) pointer) - offsetof(type, member))
#endif
#endif