#ifndef _PERF_XYARRAY_H_#define _PERF_XYARRAY_H_ 1 #include <sys/types.h> struct xyarray {	size_t row_size;	size_t entry_size;	size_t entries;	char contents[];}; struct xyarray *xyarray__new(int xlen, int ylen, size_t entry_size);void xyarray__delete(struct xyarray *xy);void xyarray__reset(struct xyarray *xy); static inline void *xyarray__entry(struct xyarray *xy, int x, int y){	return &xy->contents[x * xy->row_size + y * xy->entry_size];} #endif /* _PERF_XYARRAY_H_ */