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1da177e4 LT |
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> | |
f1f1d5eb | 7 | #include <linux/timex.h> |
9a7adcf5 | 8 | #include <linux/alarmtimer.h> |
1da177e4 | 9 | |
31ea70e0 | 10 | struct siginfo; |
55ccb616 | 11 | |
1da177e4 LT |
12 | struct cpu_timer_list { |
13 | struct list_head entry; | |
ebd7e7fc | 14 | u64 expires, incr; |
1da177e4 LT |
15 | struct task_struct *task; |
16 | int firing; | |
17 | }; | |
18 | ||
81e294cb RC |
19 | /* |
20 | * Bit fields within a clockid: | |
21 | * | |
22 | * The most significant 29 bits hold either a pid or a file descriptor. | |
23 | * | |
24 | * Bit 2 indicates whether a cpu clock refers to a thread or a process. | |
25 | * | |
26 | * Bits 1 and 0 give the type: PROF=0, VIRT=1, SCHED=2, or FD=3. | |
27 | * | |
28 | * A clockid is invalid if bits 2, 1, and 0 are all set. | |
29 | */ | |
1da177e4 LT |
30 | #define CPUCLOCK_PID(clock) ((pid_t) ~((clock) >> 3)) |
31 | #define CPUCLOCK_PERTHREAD(clock) \ | |
32 | (((clock) & (clockid_t) CPUCLOCK_PERTHREAD_MASK) != 0) | |
0606f422 | 33 | |
1da177e4 LT |
34 | #define CPUCLOCK_PERTHREAD_MASK 4 |
35 | #define CPUCLOCK_WHICH(clock) ((clock) & (clockid_t) CPUCLOCK_CLOCK_MASK) | |
36 | #define CPUCLOCK_CLOCK_MASK 3 | |
37 | #define CPUCLOCK_PROF 0 | |
38 | #define CPUCLOCK_VIRT 1 | |
39 | #define CPUCLOCK_SCHED 2 | |
40 | #define CPUCLOCK_MAX 3 | |
81e294cb RC |
41 | #define CLOCKFD CPUCLOCK_MAX |
42 | #define CLOCKFD_MASK (CPUCLOCK_PERTHREAD_MASK|CPUCLOCK_CLOCK_MASK) | |
1da177e4 LT |
43 | |
44 | #define MAKE_PROCESS_CPUCLOCK(pid, clock) \ | |
45 | ((~(clockid_t) (pid) << 3) | (clockid_t) (clock)) | |
46 | #define MAKE_THREAD_CPUCLOCK(tid, clock) \ | |
47 | MAKE_PROCESS_CPUCLOCK((tid), (clock) | CPUCLOCK_PERTHREAD_MASK) | |
48 | ||
0606f422 RC |
49 | #define FD_TO_CLOCKID(fd) ((~(clockid_t) (fd) << 3) | CLOCKFD) |
50 | #define CLOCKID_TO_FD(clk) ((unsigned int) ~((clk) >> 3)) | |
51 | ||
1da177e4 | 52 | #define REQUEUE_PENDING 1 |
03676b41 TG |
53 | |
54 | /** | |
55 | * struct k_itimer - POSIX.1b interval timer structure. | |
56 | * @list: List head for binding the timer to signals->posix_timers | |
57 | * @t_hash: Entry in the posix timer hash table | |
58 | * @it_lock: Lock protecting the timer | |
59 | * @it_clock: The posix timer clock id | |
60 | * @it_id: The posix timer id for identifying the timer | |
61 | * @it_overrun: The overrun counter for pending signals | |
62 | * @it_overrun_last: The overrun at the time of the last delivered signal | |
63 | * @it_requeue_pending: Indicator that timer waits for being requeued on | |
64 | * signal delivery | |
65 | * @it_sigev_notify: The notify word of sigevent struct for signal delivery | |
66 | * @it_signal: Pointer to the creators signal struct | |
67 | * @it_pid: The pid of the process/task targeted by the signal | |
68 | * @it_process: The task to wakeup on clock_nanosleep (CPU timers) | |
69 | * @sigq: Pointer to preallocated sigqueue | |
70 | * @it: Union representing the various posix timer type | |
71 | * internals. Also used for rcu freeing the timer. | |
72 | */ | |
73 | struct k_itimer { | |
74 | struct list_head list; | |
75 | struct hlist_node t_hash; | |
76 | spinlock_t it_lock; | |
77 | clockid_t it_clock; | |
78 | timer_t it_id; | |
79 | int it_overrun; | |
80 | int it_overrun_last; | |
81 | int it_requeue_pending; | |
82 | int it_sigev_notify; | |
83 | struct signal_struct *it_signal; | |
27af4245 | 84 | union { |
03676b41 TG |
85 | struct pid *it_pid; |
86 | struct task_struct *it_process; | |
27af4245 | 87 | }; |
03676b41 | 88 | struct sigqueue *sigq; |
1da177e4 LT |
89 | union { |
90 | struct { | |
03676b41 TG |
91 | struct hrtimer timer; |
92 | ktime_t interval; | |
1da177e4 | 93 | } real; |
03676b41 | 94 | struct cpu_timer_list cpu; |
9e264762 | 95 | struct { |
03676b41 TG |
96 | struct alarm alarmtimer; |
97 | ktime_t interval; | |
9e264762 | 98 | } alarm; |
03676b41 | 99 | struct rcu_head rcu; |
1da177e4 LT |
100 | } it; |
101 | }; | |
102 | ||
2a698971 TG |
103 | void run_posix_cpu_timers(struct task_struct *task); |
104 | void posix_cpu_timers_exit(struct task_struct *task); | |
105 | void posix_cpu_timers_exit_group(struct task_struct *task); | |
2a698971 | 106 | void set_process_cpu_timer(struct task_struct *task, unsigned int clock_idx, |
858cf3a8 | 107 | u64 *newval, u64 *oldval); |
1da177e4 | 108 | |
1711ef38 TA |
109 | long clock_nanosleep_restart(struct restart_block *restart_block); |
110 | ||
5ab46b34 | 111 | void update_rlimit_cpu(struct task_struct *task, unsigned long rlim_new); |
f06febc9 | 112 | |
31ea70e0 CH |
113 | void do_schedule_next_timer(struct siginfo *info); |
114 | ||
1da177e4 | 115 | #endif |