[thirdparty/u-boot.git] / include / time.h

/* SPDX-License-Identifier: GPL-2.0+ */

#ifndef _TIME_H
#define _TIME_H

#include <linux/typecheck.h>

unsigned long get_timer(unsigned long base);

/*
 * Return the current value of a monotonically increasing microsecond timer.
 * Granularity may be larger than 1us if hardware does not support this.
 */
unsigned long timer_get_us(void);

/*
 *	These inlines deal with timer wrapping correctly. You are
 *	strongly encouraged to use them
 *	1. Because people otherwise forget
 *	2. Because if the timer wrap changes in future you won't have to
 *	   alter your driver code.
 *
 * time_after(a,b) returns true if the time a is after time b.
 *
 * Do this with "<0" and ">=0" to only test the sign of the result. A
 * good compiler would generate better code (and a really good compiler
 * wouldn't care). Gcc is currently neither.
 */
#define time_after(a,b)		\
	(typecheck(unsigned long, a) && \
	 typecheck(unsigned long, b) && \
	 ((long)((b) - (a)) < 0))
#define time_before(a,b)	time_after(b,a)

#define time_after_eq(a,b)	\
	(typecheck(unsigned long, a) && \
	 typecheck(unsigned long, b) && \
	 ((long)((a) - (b)) >= 0))
#define time_before_eq(a,b)	time_after_eq(b,a)

/*
 * Calculate whether a is in the range of [b, c].
 */
#define time_in_range(a,b,c) \
	(time_after_eq(a,b) && \
	 time_before_eq(a,c))

/*
 * Calculate whether a is in the range of [b, c).
 */
#define time_in_range_open(a,b,c) \
	(time_after_eq(a,b) && \
	 time_before(a,c))

#endif /* _TIME_H */
Commit	Line	Data
83d290c5	1	/* SPDX-License-Identifier: GPL-2.0+ */
a7b81769 MY	2
	3	#ifndef _TIME_H
	4	#define _TIME_H
	5
21cdd133 MY	6	#include <linux/typecheck.h>
21cdd133 MY	7
a7b81769 MY	8	unsigned long get_timer(unsigned long base);
	9
	10	/*
	11	* Return the current value of a monotonically increasing microsecond timer.
	12	* Granularity may be larger than 1us if hardware does not support this.
	13	*/
	14	unsigned long timer_get_us(void);
	15
21cdd133 MY	16	/*
	17	* These inlines deal with timer wrapping correctly. You are
	18	* strongly encouraged to use them
	19	* 1. Because people otherwise forget
	20	* 2. Because if the timer wrap changes in future you won't have to
	21	* alter your driver code.
	22	*
	23	* time_after(a,b) returns true if the time a is after time b.
	24	*
	25	* Do this with "<0" and ">=0" to only test the sign of the result. A
	26	* good compiler would generate better code (and a really good compiler
	27	* wouldn't care). Gcc is currently neither.
	28	*/
	29	#define time_after(a,b) \
	30	(typecheck(unsigned long, a) && \
	31	typecheck(unsigned long, b) && \
	32	((long)((b) - (a)) < 0))
	33	#define time_before(a,b) time_after(b,a)
	34
	35	#define time_after_eq(a,b) \
	36	(typecheck(unsigned long, a) && \
	37	typecheck(unsigned long, b) && \
	38	((long)((a) - (b)) >= 0))
	39	#define time_before_eq(a,b) time_after_eq(b,a)
	40
	41	/*
	42	* Calculate whether a is in the range of [b, c].
	43	*/
	44	#define time_in_range(a,b,c) \
	45	(time_after_eq(a,b) && \
	46	time_before_eq(a,c))
	47
	48	/*
	49	* Calculate whether a is in the range of [b, c).
	50	*/
	51	#define time_in_range_open(a,b,c) \
	52	(time_after_eq(a,b) && \
	53	time_before(a,c))
	54
a7b81769	55	#endif /* _TIME_H */