1 #ifndef _linux_POSIX_TIMERS_H
2 #define _linux_POSIX_TIMERS_H
4 #include <linux/spinlock.h>
5 #include <linux/list.h>
6 #include <linux/sched.h>
7 #include <linux/timex.h>
8 #include <linux/alarmtimer.h>
11 struct cpu_timer_list {
12 struct list_head entry;
14 struct task_struct *task;
19 * Bit fields within a clockid:
21 * The most significant 29 bits hold either a pid or a file descriptor.
23 * Bit 2 indicates whether a cpu clock refers to a thread or a process.
25 * Bits 1 and 0 give the type: PROF=0, VIRT=1, SCHED=2, or FD=3.
27 * A clockid is invalid if bits 2, 1, and 0 are all set.
29 #define CPUCLOCK_PID(clock) ((pid_t) ~((clock) >> 3))
30 #define CPUCLOCK_PERTHREAD(clock) \
31 (((clock) & (clockid_t) CPUCLOCK_PERTHREAD_MASK) != 0)
33 #define CPUCLOCK_PERTHREAD_MASK 4
34 #define CPUCLOCK_WHICH(clock) ((clock) & (clockid_t) CPUCLOCK_CLOCK_MASK)
35 #define CPUCLOCK_CLOCK_MASK 3
36 #define CPUCLOCK_PROF 0
37 #define CPUCLOCK_VIRT 1
38 #define CPUCLOCK_SCHED 2
39 #define CPUCLOCK_MAX 3
40 #define CLOCKFD CPUCLOCK_MAX
41 #define CLOCKFD_MASK (CPUCLOCK_PERTHREAD_MASK|CPUCLOCK_CLOCK_MASK)
43 #define MAKE_PROCESS_CPUCLOCK(pid, clock) \
44 ((~(clockid_t) (pid) << 3) | (clockid_t) (clock))
45 #define MAKE_THREAD_CPUCLOCK(tid, clock) \
46 MAKE_PROCESS_CPUCLOCK((tid), (clock) | CPUCLOCK_PERTHREAD_MASK)
48 #define FD_TO_CLOCKID(fd) ((~(clockid_t) (fd) << 3) | CLOCKFD)
49 #define CLOCKID_TO_FD(clk) ((unsigned int) ~((clk) >> 3))
51 /* POSIX.1b interval timer structure. */
53 struct list_head list; /* free/ allocate list */
54 struct hlist_node t_hash;
56 clockid_t it_clock; /* which timer type */
57 timer_t it_id; /* timer id */
58 int it_overrun; /* overrun on pending signal */
59 int it_overrun_last; /* overrun on last delivered signal */
60 int it_requeue_pending; /* waiting to requeue this timer */
61 #define REQUEUE_PENDING 1
62 int it_sigev_notify; /* notify word of sigevent struct */
63 struct signal_struct *it_signal;
65 struct pid *it_pid; /* pid of process to send signal to */
66 struct task_struct *it_process; /* for clock_nanosleep */
68 struct sigqueue *sigq; /* signal queue entry. */
74 struct cpu_timer_list cpu;
79 unsigned long expires;
82 struct alarm alarmtimer;
90 int (*clock_getres) (const clockid_t which_clock, struct timespec *tp);
91 int (*clock_set) (const clockid_t which_clock,
92 const struct timespec *tp);
93 int (*clock_get) (const clockid_t which_clock, struct timespec * tp);
94 int (*clock_adj) (const clockid_t which_clock, struct timex *tx);
95 int (*timer_create) (struct k_itimer *timer);
96 int (*nsleep) (const clockid_t which_clock, int flags,
97 struct timespec *, struct timespec __user *);
98 long (*nsleep_restart) (struct restart_block *restart_block);
99 int (*timer_set) (struct k_itimer * timr, int flags,
100 struct itimerspec * new_setting,
101 struct itimerspec * old_setting);
102 int (*timer_del) (struct k_itimer * timr);
103 #define TIMER_RETRY 1
104 void (*timer_get) (struct k_itimer * timr,
105 struct itimerspec * cur_setting);
108 extern struct k_clock clock_posix_cpu;
109 extern struct k_clock clock_posix_dynamic;
111 void posix_timers_register_clock(const clockid_t clock_id, struct k_clock *new_clock);
113 /* function to call to trigger timer event */
114 int posix_timer_event(struct k_itimer *timr, int si_private);
116 void posix_cpu_timer_schedule(struct k_itimer *timer);
118 void run_posix_cpu_timers(struct task_struct *task);
119 void posix_cpu_timers_exit(struct task_struct *task);
120 void posix_cpu_timers_exit_group(struct task_struct *task);
121 void set_process_cpu_timer(struct task_struct *task, unsigned int clock_idx,
122 u64 *newval, u64 *oldval);
124 long clock_nanosleep_restart(struct restart_block *restart_block);
126 void update_rlimit_cpu(struct task_struct *task, unsigned long rlim_new);