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 #include <linux/timex.h> 8 #include <linux/alarmtimer.h> 9 10 union cpu_time_count { 11 cputime_t cpu; 12 unsigned long long sched; 13 }; 14 15 struct cpu_timer_list { 16 struct list_head entry; 17 union cpu_time_count expires, incr; 18 struct task_struct *task; 19 int firing; 20 }; 21 22 /* 23 * Bit fields within a clockid: 24 * 25 * The most significant 29 bits hold either a pid or a file descriptor. 26 * 27 * Bit 2 indicates whether a cpu clock refers to a thread or a process. 28 * 29 * Bits 1 and 0 give the type: PROF=0, VIRT=1, SCHED=2, or FD=3. 30 * 31 * A clockid is invalid if bits 2, 1, and 0 are all set. 32 */ 33 #define CPUCLOCK_PID(clock) ((pid_t) ~((clock) >> 3)) 34 #define CPUCLOCK_PERTHREAD(clock) \ 35 (((clock) & (clockid_t) CPUCLOCK_PERTHREAD_MASK) != 0) 36 37 #define CPUCLOCK_PERTHREAD_MASK 4 38 #define CPUCLOCK_WHICH(clock) ((clock) & (clockid_t) CPUCLOCK_CLOCK_MASK) 39 #define CPUCLOCK_CLOCK_MASK 3 40 #define CPUCLOCK_PROF 0 41 #define CPUCLOCK_VIRT 1 42 #define CPUCLOCK_SCHED 2 43 #define CPUCLOCK_MAX 3 44 #define CLOCKFD CPUCLOCK_MAX 45 #define CLOCKFD_MASK (CPUCLOCK_PERTHREAD_MASK|CPUCLOCK_CLOCK_MASK) 46 47 #define MAKE_PROCESS_CPUCLOCK(pid, clock) \ 48 ((~(clockid_t) (pid) << 3) | (clockid_t) (clock)) 49 #define MAKE_THREAD_CPUCLOCK(tid, clock) \ 50 MAKE_PROCESS_CPUCLOCK((tid), (clock) | CPUCLOCK_PERTHREAD_MASK) 51 52 #define FD_TO_CLOCKID(fd) ((~(clockid_t) (fd) << 3) | CLOCKFD) 53 #define CLOCKID_TO_FD(clk) ((unsigned int) ~((clk) >> 3)) 54 55 /* POSIX.1b interval timer structure. */ 56 struct k_itimer { 57 struct list_head list; /* free/ allocate list */ 58 spinlock_t it_lock; 59 clockid_t it_clock; /* which timer type */ 60 timer_t it_id; /* timer id */ 61 int it_overrun; /* overrun on pending signal */ 62 int it_overrun_last; /* overrun on last delivered signal */ 63 int it_requeue_pending; /* waiting to requeue this timer */ 64 #define REQUEUE_PENDING 1 65 int it_sigev_notify; /* notify word of sigevent struct */ 66 struct signal_struct *it_signal; 67 union { 68 struct pid *it_pid; /* pid of process to send signal to */ 69 struct task_struct *it_process; /* for clock_nanosleep */ 70 }; 71 struct sigqueue *sigq; /* signal queue entry. */ 72 union { 73 struct { 74 struct hrtimer timer; 75 ktime_t interval; 76 } real; 77 struct cpu_timer_list cpu; 78 struct { 79 unsigned int clock; 80 unsigned int node; 81 unsigned long incr; 82 unsigned long expires; 83 } mmtimer; 84 struct { 85 struct alarm alarmtimer; 86 ktime_t interval; 87 } alarm; 88 struct rcu_head rcu; 89 } it; 90 }; 91 92 struct k_clock { 93 int (*clock_getres) (const clockid_t which_clock, struct timespec *tp); 94 int (*clock_set) (const clockid_t which_clock, 95 const struct timespec *tp); 96 int (*clock_get) (const clockid_t which_clock, struct timespec * tp); 97 int (*clock_adj) (const clockid_t which_clock, struct timex *tx); 98 int (*timer_create) (struct k_itimer *timer); 99 int (*nsleep) (const clockid_t which_clock, int flags, 100 struct timespec *, struct timespec __user *); 101 long (*nsleep_restart) (struct restart_block *restart_block); 102 int (*timer_set) (struct k_itimer * timr, int flags, 103 struct itimerspec * new_setting, 104 struct itimerspec * old_setting); 105 int (*timer_del) (struct k_itimer * timr); 106 #define TIMER_RETRY 1 107 void (*timer_get) (struct k_itimer * timr, 108 struct itimerspec * cur_setting); 109 }; 110 111 extern struct k_clock clock_posix_cpu; 112 extern struct k_clock clock_posix_dynamic; 113 114 void posix_timers_register_clock(const clockid_t clock_id, struct k_clock *new_clock); 115 116 /* function to call to trigger timer event */ 117 int posix_timer_event(struct k_itimer *timr, int si_private); 118 119 void posix_cpu_timer_schedule(struct k_itimer *timer); 120 121 void run_posix_cpu_timers(struct task_struct *task); 122 void posix_cpu_timers_exit(struct task_struct *task); 123 void posix_cpu_timers_exit_group(struct task_struct *task); 124 125 void set_process_cpu_timer(struct task_struct *task, unsigned int clock_idx, 126 cputime_t *newval, cputime_t *oldval); 127 128 long clock_nanosleep_restart(struct restart_block *restart_block); 129 130 void update_rlimit_cpu(struct task_struct *task, unsigned long rlim_new); 131 132 #endif 133