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