cregit-Linux how code gets into the kernel

Release 4.12 include/linux/posix-timers.h

Directory: include/linux
#ifndef _linux_POSIX_TIMERS_H

#define _linux_POSIX_TIMERS_H

#include <linux/spinlock.h>
#include <linux/list.h>
#include <linux/sched.h>
#include <linux/timex.h>
#include <linux/alarmtimer.h>

struct cpu_timer_list {
struct list_head entry;

u64 expires, incr;
struct task_struct *task;
int firing;

 * Bit fields within a clockid:
 * The most significant 29 bits hold either a pid or a file descriptor.
 * Bit 2 indicates whether a cpu clock refers to a thread or a process.
 * Bits 1 and 0 give the type: PROF=0, VIRT=1, SCHED=2, or FD=3.
 * A clockid is invalid if bits 2, 1, and 0 are all set.

#define CPUCLOCK_PID(clock)		((pid_t) ~((clock) >> 3))

#define CPUCLOCK_PERTHREAD(clock) \
	(((clock) & (clockid_t) CPUCLOCK_PERTHREAD_MASK) != 0)


#define CPUCLOCK_WHICH(clock)	((clock) & (clockid_t) CPUCLOCK_CLOCK_MASK)


#define CPUCLOCK_PROF		0

#define CPUCLOCK_VIRT		1


#define CPUCLOCK_MAX		3



#define MAKE_PROCESS_CPUCLOCK(pid, clock) \
	((~(clockid_t) (pid) << 3) | (clockid_t) (clock))

#define MAKE_THREAD_CPUCLOCK(tid, clock) \

#define FD_TO_CLOCKID(fd)	((~(clockid_t) (fd) << 3) | CLOCKFD)

#define CLOCKID_TO_FD(clk)	((unsigned int) ~((clk) >> 3))

/* POSIX.1b interval timer structure. */

struct k_itimer {
struct list_head list;		/* free/ allocate list */
struct hlist_node t_hash;
spinlock_t it_lock;
clockid_t it_clock;		/* which timer type */
timer_t it_id;			/* timer id */
int it_overrun;			/* overrun on pending signal  */
int it_overrun_last;		/* overrun on last delivered signal */
int it_requeue_pending;		/* waiting to requeue this timer */

int it_sigev_notify;		/* notify word of sigevent struct */
struct signal_struct *it_signal;
	union {
struct pid *it_pid;	/* pid of process to send signal to */
struct task_struct *it_process;	/* for clock_nanosleep */
struct sigqueue *sigq;		/* signal queue entry. */
	union {
		struct {
struct hrtimer timer;
ktime_t interval;
} real;
struct cpu_timer_list cpu;
		struct {
unsigned int clock;
unsigned int node;
unsigned long incr;
unsigned long expires;
} mmtimer;
		struct {
struct alarm alarmtimer;
ktime_t interval;
} alarm;
struct rcu_head rcu;
} it;

struct k_clock {
int (*clock_getres) (const clockid_t which_clock, struct timespec64 *tp);
int (*clock_set) (const clockid_t which_clock,
			  const struct timespec64 *tp);
int (*clock_get) (const clockid_t which_clock, struct timespec64 *tp);
int (*clock_adj) (const clockid_t which_clock, struct timex *tx);
int (*timer_create) (struct k_itimer *timer);
int (*nsleep) (const clockid_t which_clock, int flags,
		       struct timespec64 *, struct timespec __user *);
long (*nsleep_restart) (struct restart_block *restart_block);
int (*timer_set) (struct k_itimer *timr, int flags,
			  struct itimerspec64 *new_setting,
			  struct itimerspec64 *old_setting);
int (*timer_del) (struct k_itimer *timr);

#define TIMER_RETRY 1
void (*timer_get) (struct k_itimer *timr,
			   struct itimerspec64 *cur_setting);

extern struct k_clock clock_posix_cpu;
extern struct k_clock clock_posix_dynamic;

void posix_timers_register_clock(const clockid_t clock_id, struct k_clock *new_clock);

/* function to call to trigger timer event */
int posix_timer_event(struct k_itimer *timr, int si_private);

void posix_cpu_timer_schedule(struct k_itimer *timer);

void run_posix_cpu_timers(struct task_struct *task);
void posix_cpu_timers_exit(struct task_struct *task);
void posix_cpu_timers_exit_group(struct task_struct *task);
void set_process_cpu_timer(struct task_struct *task, unsigned int clock_idx,
			   u64 *newval, u64 *oldval);

long clock_nanosleep_restart(struct restart_block *restart_block);

void update_rlimit_cpu(struct task_struct *task, unsigned long rlim_new);


Overall Contributors

Roland McGrath25545.95%514.71%
George Anzinger10418.74%25.88%
Richard Cochran488.65%411.76%
Christoph Lameter386.85%25.88%
Thomas Gleixner274.86%617.65%
Toyo Abe213.78%12.94%
Oleg Nesterov162.88%12.94%
John Stultz152.70%25.88%
Frank Mayhar81.44%12.94%
Deepa Dinamani71.26%514.71%
Jiri Slaby50.90%12.94%
Eric Dumazet40.72%12.94%
Pavel Emelyanov40.72%12.94%
Frédéric Weisbecker30.54%25.88%
Directory: include/linux
Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
Created with cregit.