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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2009 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/*
* Copyright 2020 Joyent, Inc.
*/
#ifndef _SYS_TIMER_H
#define _SYS_TIMER_H
#include <sys/types.h>
#include <sys/proc.h>
#include <sys/thread.h>
#include <sys/param.h>
#include <sys/siginfo.h>
#include <sys/port.h>
#ifdef __cplusplus
extern "C" {
#endif
#ifdef _KERNEL
#define _TIMER_MAX 32
/*
* Max timers per process. This is patchable via /etc/system and can be
* updated via kmdb. Sticking to positive powers of 2 is recommended.
* The default value is 4 * NCPU. Setting timer_max to a value below the
* default via /etc/system is ignored.
*/
extern int timer_max;
#define _TIMER_ALLOC_INIT 8 /* initial size for p_itimer array */
/*
* Bit values for the it_lock field.
*/
#define ITLK_LOCKED 0x01
#define ITLK_WANTED 0x02
#define ITLK_REMOVE 0x04
/*
* Bit values for the it_flags field.
*/
#define IT_SIGNAL 0x01
#define IT_PORT 0x02 /* use event port notification */
#define IT_CALLBACK 0x04 /* custom callback function */
struct clock_backend;
struct itimer;
typedef struct itimer itimer_t;
struct itimer {
itimerspec_t it_itime;
hrtime_t it_hrtime;
ushort_t it_flags;
ushort_t it_lock;
void *it_arg; /* clock backend-specific data */
struct proc *it_proc;
union {
struct {
sigqueue_t *__it_sigq;
klwp_t *__it_lwp;
} __proc;
void *__it_frontend;
} __data; /* timer frontend-specific data */
kcondvar_t it_cv;
int it_blockers;
int it_pending;
int it_overrun;
struct clock_backend *it_backend;
void (*it_fire)(itimer_t *);
kmutex_t it_mutex;
union {
struct {
void *_it_portev; /* port_kevent_t pointer */
void *_it_portsrc; /* port_source_t pointer */
int _it_portfd; /* port file descriptor */
} _it_ev_port;
struct {
void (*_it_cb_func)(itimer_t *);
uintptr_t _it_cb_data[2];
} _it_ev_cb;
} _it_ev_data;
};
#define it_sigq __data.__proc.__it_sigq
#define it_lwp __data.__proc.__it_lwp
#define it_frontend __data.__it_frontend
#define it_portev _it_ev_data._it_ev_port._it_portev
#define it_portsrc _it_ev_data._it_ev_port._it_portsrc
#define it_portfd _it_ev_data._it_ev_port._it_portfd
#define it_cb_func _it_ev_data._it_ev_cb._it_cb_func
#define it_cb_data _it_ev_data._it_ev_cb._it_cb_data
typedef struct clock_backend {
struct sigevent clk_default;
int (*clk_clock_settime)(timespec_t *);
int (*clk_clock_gettime)(timespec_t *);
int (*clk_clock_getres)(timespec_t *);
int (*clk_timer_create)(itimer_t *, void (*)(itimer_t *));
int (*clk_timer_settime)(itimer_t *, int, const struct itimerspec *);
int (*clk_timer_gettime)(itimer_t *, struct itimerspec *);
int (*clk_timer_delete)(itimer_t *);
void (*clk_timer_lwpbind)(itimer_t *);
} clock_backend_t;
extern void clock_add_backend(clockid_t clock, clock_backend_t *backend);
extern clock_backend_t *clock_get_backend(clockid_t clock);
extern void timer_release(struct proc *, itimer_t *);
extern void timer_delete_grabbed(struct proc *, timer_t tid, itimer_t *it);
extern void timer_lwpbind();
extern int timer_setup(clock_backend_t *, struct sigevent *, port_notify_t *,
itimer_t **, timer_t *);
extern void timer_func(sigqueue_t *);
extern void timer_exit(void);
extern void timer_lwpexit(void);
extern clock_t hzto(struct timeval *);
extern clock_t timespectohz(timespec_t *, timespec_t);
extern int64_t timespectohz64(timespec_t *);
extern int itimerspecfix(timespec_t *);
extern void timespecadd(timespec_t *, timespec_t *);
extern void timespecsub(timespec_t *, timespec_t *);
extern void timespecfix(timespec_t *);
extern int xgetitimer(uint_t, struct itimerval *, int);
extern int xsetitimer(uint_t, struct itimerval *, int);
extern void delete_itimer_realprof(void);
#define timerspecisset(tvp) ((tvp)->tv_sec || (tvp)->tv_nsec)
#define timerspeccmp(tvp, uvp) (((tvp)->tv_sec - (uvp)->tv_sec) ? \
((tvp)->tv_sec - (uvp)->tv_sec):((tvp)->tv_nsec - (uvp)->tv_nsec))
#define timerspecclear(tvp) ((tvp)->tv_sec = (tvp)->tv_nsec = 0)
struct oldsigevent {
/* structure definition prior to notification attributes member */
int _notify;
union {
int _signo;
void (*_notify_function)(union sigval);
} _un;
union sigval _value;
};
#if defined(_SYSCALL32)
struct oldsigevent32 {
int32_t _notify;
union {
int32_t _signo;
caddr32_t _notify_function;
} _un;
union sigval32 _value;
};
#endif /* _SYSCALL32 */
#endif /* _KERNEL */
#ifdef __cplusplus
}
#endif
#endif /* _SYS_TIMER_H */
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