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include/linux/posix-timers.h
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#ifndef _linux_POSIX_TIMERS_H #define _linux_POSIX_TIMERS_H #include <linux/spinlock.h> #include <linux/list.h> #include <linux/sched.h> |
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#include <linux/timex.h> |
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#include <linux/alarmtimer.h> |
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union cpu_time_count { cputime_t cpu; unsigned long long sched; }; struct cpu_timer_list { struct list_head entry; union cpu_time_count expires, incr; struct task_struct *task; int firing; }; |
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/* * 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. */ |
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#define CPUCLOCK_PID(clock) ((pid_t) ~((clock) >> 3)) #define CPUCLOCK_PERTHREAD(clock) \ (((clock) & (clockid_t) CPUCLOCK_PERTHREAD_MASK) != 0) |
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#define CPUCLOCK_PERTHREAD_MASK 4 #define CPUCLOCK_WHICH(clock) ((clock) & (clockid_t) CPUCLOCK_CLOCK_MASK) #define CPUCLOCK_CLOCK_MASK 3 #define CPUCLOCK_PROF 0 #define CPUCLOCK_VIRT 1 #define CPUCLOCK_SCHED 2 #define CPUCLOCK_MAX 3 |
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#define CLOCKFD CPUCLOCK_MAX #define CLOCKFD_MASK (CPUCLOCK_PERTHREAD_MASK|CPUCLOCK_CLOCK_MASK) |
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#define MAKE_PROCESS_CPUCLOCK(pid, clock) \ ((~(clockid_t) (pid) << 3) | (clockid_t) (clock)) #define MAKE_THREAD_CPUCLOCK(tid, clock) \ MAKE_PROCESS_CPUCLOCK((tid), (clock) | CPUCLOCK_PERTHREAD_MASK) |
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#define FD_TO_CLOCKID(fd) ((~(clockid_t) (fd) << 3) | CLOCKFD) #define CLOCKID_TO_FD(clk) ((unsigned int) ~((clk) >> 3)) |
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/* POSIX.1b interval timer structure. */ struct k_itimer { struct list_head list; /* free/ allocate list */ 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 */ |
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int it_requeue_pending; /* waiting to requeue this timer */ |
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#define REQUEUE_PENDING 1 int it_sigev_notify; /* notify word of sigevent struct */ |
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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 */ }; |
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struct sigqueue *sigq; /* signal queue entry. */ union { struct { |
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struct hrtimer timer; ktime_t interval; |
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} real; struct cpu_timer_list cpu; struct { unsigned int clock; unsigned int node; unsigned long incr; unsigned long expires; } mmtimer; |
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struct { struct alarm alarmtimer; ktime_t interval; } alarm; |
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struct rcu_head rcu; |
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} it; }; |
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struct k_clock { |
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int (*clock_getres) (const clockid_t which_clock, struct timespec *tp); |
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int (*clock_set) (const clockid_t which_clock, const struct timespec *tp); |
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int (*clock_get) (const clockid_t which_clock, struct timespec * tp); |
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int (*clock_adj) (const clockid_t which_clock, struct timex *tx); |
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int (*timer_create) (struct k_itimer *timer); |
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int (*nsleep) (const clockid_t which_clock, int flags, |
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struct timespec *, struct timespec __user *); |
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long (*nsleep_restart) (struct restart_block *restart_block); |
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int (*timer_set) (struct k_itimer * timr, int flags, struct itimerspec * new_setting, struct itimerspec * old_setting); int (*timer_del) (struct k_itimer * timr); #define TIMER_RETRY 1 void (*timer_get) (struct k_itimer * timr, struct itimerspec * cur_setting); }; |
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extern struct k_clock clock_posix_cpu; |
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extern struct k_clock clock_posix_dynamic; |
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void posix_timers_register_clock(const clockid_t clock_id, struct k_clock *new_clock); |
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/* function to call to trigger timer event */ int posix_timer_event(struct k_itimer *timr, int si_private); |
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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, cputime_t *newval, cputime_t *oldval); |
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long clock_nanosleep_restart(struct restart_block *restart_block); |
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void update_rlimit_cpu(struct task_struct *task, unsigned long rlim_new); |
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#endif |