WebSVN - shark - Blame - Rev 131 - /shark/trunk/oslib/ll/sys/ll/time.h

Rev	Author	Line No.	Line
42	pj	1	/* Project: OSLib
		2	* Description: The OS Construction Kit
		3	* Date: 1.6.2000
		4	* Idea by: Luca Abeni & Gerardo Lamastra
		5	*
		6	* OSLib is an SO project aimed at developing a common, easy-to-use
		7	* low-level infrastructure for developing OS kernels and Embedded
		8	* Applications; it partially derives from the HARTIK project but it
		9	* currently is independently developed.
		10	*
		11	* OSLib is distributed under GPL License, and some of its code has
		12	* been derived from the Linux kernel source; also some important
		13	* ideas come from studying the DJGPP go32 extender.
		14	*
		15	* We acknowledge the Linux Community, Free Software Foundation,
		16	* D.J. Delorie and all the other developers who believe in the
		17	* freedom of software and ideas.
		18	*
		19	* For legalese, check out the included GPL license.
		20	*/
		21
		22	/* Inline functions for managing timespec structures.
		23	All timespec values are pointers!!!
		24	This file defines these functions:
		25	TIMESPEC2NANOSEC(t)
		26	converts a timespec value to a nanosec value, and return
		27	it, no checks
		28	TIMESPEC2USEC(t)
		29	converts a timespec value to a nanosec value, and return
		30	it, no checks
		31	NULL_TIMESPEC(t)
		32	the timespec value is set to the Epoch (=0)
		33	ADDNANO2TIMESPEC(n, t)
		34	t = t + n
		35	ADDUSEC2TIMESPEC(m, t)
		36	t = t + m
131	giacomo	37	SUBTIMESPEC(s1, s2, d) Works well only if s1 >= s2
42	pj	38	d = s1 - s2
		39	ADDTIMESPEC(s1, s2, d)
		40	d = s1 + s2
		41	TIMESPEC_A_LT_B(a,b)
		42	a < b
		43	TIMESPEC_A_GT_B(a,b)
		44	a > b
		45	TIMESPEC_A_EQ_B(a,b)
		46	a == b
		47	TIMESPEC_A_NEQ_B(a,b)
		48	a != b
		49	TIMESPEC_ASSIGN(t1,t2)
		50	t1 = t2 */
		51
		52	#ifndef __LL_SYS_LL_TIME_H__
		53	#define __LL_SYS_LL_TIME_H__
		54
		55	#include <ll/i386/defs.h>
		56	BEGIN_DEF
		57
		58	struct timespec {
131	giacomo	59	long tv_sec; /* Seconds */
		60	long tv_nsec; /* Nanoseconds */
42	pj	61	};
		62
		63	/*
		64	* these macros come from the Utah Flux oskit...
		65	*/
		66
		67	#define TIMESPEC2NANOSEC(t) ((t)->tv_sec * 1000000000 + (t)->tv_nsec)
		68	#define TIMESPEC2USEC(t) ((t)->tv_sec * 1000000 + (t)->tv_nsec / 1000)
131	giacomo	69	#define NULL_TIMESPEC(t) ((t)->tv_sec = (t)->tv_nsec = 0)
		70	#define ADDNANO2TIMESPEC(n, t) ((t)->tv_nsec += (n), \
		71	(t)->tv_sec += (t)->tv_nsec / 1000000000, \
		72	(t)->tv_nsec %= 1000000000)
42	pj	73
131	giacomo	74	#define SUBTIMESPEC(s1, s2, d) \
		75	((d)->tv_nsec = ((s1)->tv_nsec >= (s2)->tv_nsec) ? \
		76	(((d)->tv_sec = (s1)->tv_sec - (s2)->tv_sec), \
		77	(s1)->tv_nsec - (s2)->tv_nsec) \
		78	: \
		79	(((d)->tv_sec = (s1)->tv_sec - (s2)->tv_sec - 1), \
		80	(1000000000 + (s1)->tv_nsec - (s2)->tv_nsec)))
42	pj	81
131	giacomo	82	/*
		83	* ...and these not!
		84	*/
42	pj	85
		86	extern __inline__ void ADDTIMESPEC(const struct timespec *s1,
		87	const struct timespec *s2,
		88	struct timespec *d)
		89	{
131	giacomo	90	d->tv_sec = s1->tv_sec + s2->tv_sec;
		91	d->tv_nsec = s1->tv_nsec + s2->tv_nsec;
42	pj	92
131	giacomo	93	if (d->tv_nsec < 0) {
		94	d->tv_sec--;
		95	d->tv_nsec += 1000000000;
		96	} else if (d->tv_nsec >= 1000000000) {
		97	d->tv_sec++;
		98	d->tv_nsec -= 1000000000;
		99	}
		100	}
42	pj	101
		102
131	giacomo	103	#define ADDUSEC2TIMESPEC(m, t) ((t)->tv_nsec += (m%1000000)*1000, \
		104	(t)->tv_sec += ((t)->tv_nsec / 1000000000) + (m/1000000), \
		105	(t)->tv_nsec %= 1000000000)
42	pj	106
		107	#define TIMESPEC_A_LT_B(a,b) \
		108	( \
		109	((a)->tv_sec < (b)->tv_sec) \|\| \
131	giacomo	110	((a)->tv_sec == (b)->tv_sec && (a)->tv_nsec < (b)->tv_nsec) \
42	pj	111	)
		112
		113	#define TIMESPEC_A_GT_B(a,b) \
		114	( \
		115	((a)->tv_sec > (b)->tv_sec) \|\| \
131	giacomo	116	((a)->tv_sec == (b)->tv_sec && (a)->tv_nsec > (b)->tv_nsec) \
42	pj	117	)
		118
		119	#define TIMESPEC_A_EQ_B(a,b) \
		120	((a)->tv_sec == (b)->tv_sec && (a)->tv_nsec == (b)->tv_nsec)
		121
131	giacomo	122	#define TIMESPEC_A_NEQ_B(a,b) \
42	pj	123	((a)->tv_sec != (b)->tv_sec \|\| (a)->tv_nsec != (b)->tv_nsec)
		124
		125	#define TIMESPEC_ASSIGN(t1,t2) \
131	giacomo	126	((t1)->tv_sec = (t2)->tv_sec, (t1)->tv_nsec = (t2)->tv_nsec)
42	pj	127
		128	#if 0
		129	#define PITSPEC2TIMESPEC(a,b) \
		130	((b)->tv_nsec = (((DWORD)((a)->units) * 1000) / 1197) * 1000, \
		131	(b)->tv_sec = ((a)->gigas * 1197) / 1000) /*, \
		132	(b)->tv_sec += (b)->tv_nsec / 1000000000, \
		133	(b)->tv_nsec %= 1000000000) */
		134	#else
		135	/*#define PITSPEC2TIMESPEC(a,b) \
		136	((b)->tv_nsec = (((DWORD)((a)->units) * 1000) / 1197) * 1000, \
		137	(b)->tv_nsec += (((a)->gigas * 1197) % 1000) * 1000000, \
		138	(b)->tv_sec = ((a)->gigas * 1197) / 1000 , \
		139	(b)->tv_sec += (b)->tv_nsec / 1000000000, \
		140	(b)->tv_nsec %= 1000000000)*/
		141	#define PITSPEC2TIMESPEC(a,b) \
		142	((b)->tv_nsec = (((DWORD)((a)->units) * 1000) / 1197), \
		143	(b)->tv_nsec += (((a)->gigas * 1197) % 1000) * 1000, \
		144	(b)->tv_sec = ((a)->gigas * 1197) / 1000 , \
		145	(b)->tv_sec += (b)->tv_nsec / 1000000, \
		146	(b)->tv_nsec %= 1000000, \
		147	(b)->tv_nsec *= 1000)
		148	#endif
		149
		150	TIME ll_gettime(int mode, struct timespec *tsres);
131	giacomo	151	void ll_read_timespec(struct timespec *tspec);
42	pj	152
		153	#define TIME_PTICK 1
		154	#define TIME_EXACT 2
		155	#define TIME_NEW 3
		156
		157	END_DEF
		158	#endif

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