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The C and C++ Include Header Files

/usr/include/ntirpc/misc/opr.h


$ cat -n /usr/include/ntirpc/misc/opr.h

     1	#ifndef OPR_H
     2	#define OPR_H 1
     3	
     4	#define opr_containerof(ptr, structure, member) \
     5		((structure *)((char *)(ptr)-(char *)offsetof(structure, member)))
     6	
     7	#endif				/* OPR_H */