1 #ifndef _linux_POSIX_TIMERS_H 2 #define _linux_POSIX_TIMERS_H 3 4 #include <linux/spinlock.h> 5 #include <linux/list.h> 6 #include <linux/sched.h> 7 8 union cpu_time_count { 9 cputime_t cpu; 10 unsigned long long sched; 11 }; 12 13 struct cpu_timer_list { 14 struct list_head entry; 15 union cpu_time_count expires, incr; 16 struct task_struct *task; 17 int firing; 18 }; 19 20 #define CPUCLOCK_PID(clock) ((pid_t) ~((clock) >> 3)) 21 #define CPUCLOCK_PERTHREAD(clock) \ 22 (((clock) & (clockid_t) CPUCLOCK_PERTHREAD_MASK) != 0) 23 #define CPUCLOCK_PID_MASK 7 24 #define CPUCLOCK_PERTHREAD_MASK 4 25 #define CPUCLOCK_WHICH(clock) ((clock) & (clockid_t) CPUCLOCK_CLOCK_MASK) 26 #define CPUCLOCK_CLOCK_MASK 3 27 #define CPUCLOCK_PROF 0 28 #define CPUCLOCK_VIRT 1 29 #define CPUCLOCK_SCHED 2 30 #define CPUCLOCK_MAX 3 31 32 #define MAKE_PROCESS_CPUCLOCK(pid, clock) \ 33 ((~(clockid_t) (pid) << 3) | (clockid_t) (clock)) 34 #define MAKE_THREAD_CPUCLOCK(tid, clock) \ 35 MAKE_PROCESS_CPUCLOCK((tid), (clock) | CPUCLOCK_PERTHREAD_MASK) 36 37 /* POSIX.1b interval timer structure. */ 38 struct k_itimer { 39 struct list_head list; /* free/ allocate list */ 40 spinlock_t it_lock; 41 clockid_t it_clock; /* which timer type */ 42 timer_t it_id; /* timer id */ 43 int it_overrun; /* overrun on pending signal */ 44 int it_overrun_last; /* overrun on last delivered signal */ 45 int it_requeue_pending; /* waiting to requeue this timer */ 46 #define REQUEUE_PENDING 1 47 int it_sigev_notify; /* notify word of sigevent struct */ 48 struct signal_struct *it_signal; 49 union { 50 struct pid *it_pid; /* pid of process to send signal to */ 51 struct task_struct *it_process; /* for clock_nanosleep */ 52 }; 53 struct sigqueue *sigq; /* signal queue entry. */ 54 union { 55 struct { 56 struct hrtimer timer; 57 ktime_t interval; 58 } real; 59 struct cpu_timer_list cpu; 60 struct { 61 unsigned int clock; 62 unsigned int node; 63 unsigned long incr; 64 unsigned long expires; 65 } mmtimer; 66 } it; 67 }; 68 69 struct k_clock { 70 int res; /* in nanoseconds */ 71 int (*clock_getres) (const clockid_t which_clock, struct timespec *tp); 72 int (*clock_set) (const clockid_t which_clock, struct timespec * tp); 73 int (*clock_get) (const clockid_t which_clock, struct timespec * tp); 74 int (*timer_create) (struct k_itimer *timer); 75 int (*nsleep) (const clockid_t which_clock, int flags, 76 struct timespec *, struct timespec __user *); 77 long (*nsleep_restart) (struct restart_block *restart_block); 78 int (*timer_set) (struct k_itimer * timr, int flags, 79 struct itimerspec * new_setting, 80 struct itimerspec * old_setting); 81 int (*timer_del) (struct k_itimer * timr); 82 #define TIMER_RETRY 1 83 void (*timer_get) (struct k_itimer * timr, 84 struct itimerspec * cur_setting); 85 }; 86 87 void register_posix_clock(const clockid_t clock_id, struct k_clock *new_clock); 88 89 /* error handlers for timer_create, nanosleep and settime */ 90 int do_posix_clock_nonanosleep(const clockid_t, int flags, struct timespec *, 91 struct timespec __user *); 92 int do_posix_clock_nosettime(const clockid_t, struct timespec *tp); 93 94 /* function to call to trigger timer event */ 95 int posix_timer_event(struct k_itimer *timr, int si_private); 96 97 int posix_cpu_clock_getres(const clockid_t which_clock, struct timespec *ts); 98 int posix_cpu_clock_get(const clockid_t which_clock, struct timespec *ts); 99 int posix_cpu_clock_set(const clockid_t which_clock, const struct timespec *ts); 100 int posix_cpu_timer_create(struct k_itimer *timer); 101 int posix_cpu_nsleep(const clockid_t which_clock, int flags, 102 struct timespec *rqtp, struct timespec __user *rmtp); 103 long posix_cpu_nsleep_restart(struct restart_block *restart_block); 104 int posix_cpu_timer_set(struct k_itimer *timer, int flags, 105 struct itimerspec *new, struct itimerspec *old); 106 int posix_cpu_timer_del(struct k_itimer *timer); 107 void posix_cpu_timer_get(struct k_itimer *timer, struct itimerspec *itp); 108 109 void posix_cpu_timer_schedule(struct k_itimer *timer); 110 111 void run_posix_cpu_timers(struct task_struct *task); 112 void posix_cpu_timers_exit(struct task_struct *task); 113 void posix_cpu_timers_exit_group(struct task_struct *task); 114 115 void set_process_cpu_timer(struct task_struct *task, unsigned int clock_idx, 116 cputime_t *newval, cputime_t *oldval); 117 118 long clock_nanosleep_restart(struct restart_block *restart_block); 119 120 void update_rlimit_cpu(unsigned long rlim_new); 121 122 #endif 123