6c8f7fc3ba
. add all sys/sys headers not already present to help compiling . take netbsd dirent.h and struct dirent; main result is introducing d_type and d_namlen that have to be set by getdents() in all FS code implementing it . d_off is gone . alignment of the struct has become 8 bytes instead of 4 . remove _MAX_BLOCK_SIZE, _MIN_BLOCK_SIZE, _STATIC_BLOCK_SIZE . libminlib: cleanup unused yet duplicate code . mfs: throw out the long-broken v1, v2 support . new test for dirent contents filled by getdents() Change-Id: I1459755c7ba5e5d1c9396d3a587ce6e63ddc283e
93 lines
2.8 KiB
C
93 lines
2.8 KiB
C
/* $NetBSD: timetc.h,v 1.6 2009/01/11 02:45:56 christos Exp $ */
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/*-
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* ----------------------------------------------------------------------------
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* "THE BEER-WARE LICENSE" (Revision 42):
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* <phk@FreeBSD.ORG> wrote this file. As long as you retain this notice you
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* can do whatever you want with this stuff. If we meet some day, and you think
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* this stuff is worth it, you can buy me a beer in return. Poul-Henning Kamp
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* ----------------------------------------------------------------------------
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*
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* $FreeBSD: src/sys/sys/timetc.h,v 1.58 2003/08/16 08:23:52 phk Exp $
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*/
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#ifndef _SYS_TIMETC_H_
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#define _SYS_TIMETC_H_
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#ifndef _KERNEL
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#error "no user-serviceable parts inside"
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#endif
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/*
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* max recommended timecounter name length
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*
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* it is not a functional limit but names longer
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* then that will not be controllable via
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* sysctl. see kern/kern_tc.c for the sysctl
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* implementation.
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*/
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#define MAX_TCNAMELEN 64
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/*-
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* `struct timecounter' is the interface between the hardware which implements
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* a timecounter and the MI code which uses this to keep track of time.
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*
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* A timecounter is a binary counter which has two properties:
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* * it runs at a fixed, known frequency.
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* * it has sufficient bits to not roll over in less than approximately
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* max(2 msec, 2/HZ seconds). (The value 2 here is really 1 + delta,
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* for some indeterminate value of delta.)
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*/
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struct timecounter;
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typedef u_int timecounter_get_t(struct timecounter *);
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typedef void timecounter_pps_t(struct timecounter *);
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struct timecounter {
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timecounter_get_t *tc_get_timecount;
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/*
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* This function reads the counter. It is not required to
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* mask any unimplemented bits out, as long as they are
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* constant.
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*/
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timecounter_pps_t *tc_poll_pps;
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/*
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* This function is optional. It will be called whenever the
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* timecounter is rewound, and is intended to check for PPS
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* events. Normal hardware does not need it but timecounters
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* which latch PPS in hardware (like sys/pci/xrpu.c) do.
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*/
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u_int tc_counter_mask;
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/* This mask should mask off any unimplemented bits. */
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u_int64_t tc_frequency;
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/* Frequency of the counter in Hz. */
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const char *tc_name;
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/* Name of the timecounter. */
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int tc_quality;
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/*
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* Used to determine if this timecounter is better than
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* another timecounter higher means better. Negative
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* means "only use at explicit request".
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*/
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void *tc_priv;
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/* Pointer to the timecounter's private parts. */
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struct timecounter *tc_next;
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/* Pointer to the next timecounter. */
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};
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extern struct timecounter *timecounter;
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u_int64_t tc_getfrequency(void);
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void tc_init(struct timecounter *tc);
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int tc_detach(struct timecounter *);
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void tc_setclock(const struct timespec *ts);
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void tc_ticktock(void);
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void tc_gonebad(struct timecounter *);
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#ifdef SYSCTL_DECL
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SYSCTL_DECL(_kern_timecounter);
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#endif
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#endif /* !_SYS_TIMETC_H_ */
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