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	/* Macros for min/max. */			/* Macros for min/max. */
	#undef MIN			#undef MIN
	#undef MAX			#undef MAX
	#define MIN(_a,_b) ((_a)<(_b)?(_a):(_b))			#define MIN(_a,_b) ((_a)<(_b)?(_a):(_b))
	#define MAX(_a,_b) ((_a)<(_b)?(_b):(_a))			#define MAX(_a,_b) ((_a)<(_b)?(_b):(_a))

	/* Operations on timespecs */			/* Operations on timespecs */
	#undef timespecclear
	#undef timespecisset
	#undef timespeccmp
	#undef timespecadd			#undef timespecadd
	#undef timespecsub			#undef timespecsub
	#define timespecclear(tvp) ((tvp)->tv_sec = (tvp)->tv_nsec = 0)
	#define timespecisset(tvp) ((tvp)->tv_sec \|\| (tvp)->tv_nsec)
	#define timespeccmp(tvp, uvp, cmp) \
	(((tvp)->tv_sec == (uvp)->tv_sec) ? \
	((tvp)->tv_nsec cmp (uvp)->tv_nsec) : \
	((tvp)->tv_sec cmp (uvp)->tv_sec))
	#define timespecadd(vvp, uvp) \			#define timespecadd(vvp, uvp) \
	do { \			do { \
	(vvp)->tv_sec += (uvp)->tv_sec; \			(vvp)->tv_sec += (uvp)->tv_sec; \
	(vvp)->tv_nsec += (uvp)->tv_nsec; \			(vvp)->tv_nsec += (uvp)->tv_nsec; \
	if ((vvp)->tv_nsec >= 1000000000) { \			if ((vvp)->tv_nsec >= 1000000000) { \
	(vvp)->tv_sec++; \			(vvp)->tv_sec++; \
	(vvp)->tv_nsec -= 1000000000; \			(vvp)->tv_nsec -= 1000000000; \
	} \			} \
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