25 lines
502 B
C
25 lines
502 B
C
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#ifndef BASE_CONTAINER_OF_H
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#define BASE_CONTAINER_OF_H
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#include <stdlib.h>
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//----------------------------------------------------------------
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namespace base {
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template<class P, class M>
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size_t offsetof__(const M P::*member)
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{
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return (size_t) &( reinterpret_cast<P*>(0)->*member);
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}
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template<class P, class M>
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P *container_of(M *ptr, M const P::*member)
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{
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return (P *)((char *)(ptr) - offsetof__(member));
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}
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}
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//----------------------------------------------------------------
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#endif
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