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-rw-r--r--kernel/include/linux/posix-timers.h141
1 files changed, 141 insertions, 0 deletions
diff --git a/kernel/include/linux/posix-timers.h b/kernel/include/linux/posix-timers.h
new file mode 100644
index 000000000..907f3fd19
--- /dev/null
+++ b/kernel/include/linux/posix-timers.h
@@ -0,0 +1,141 @@
+#ifndef _linux_POSIX_TIMERS_H
+#define _linux_POSIX_TIMERS_H
+
+#include <linux/spinlock.h>
+#include <linux/list.h>
+#include <linux/sched.h>
+#include <linux/timex.h>
+#include <linux/alarmtimer.h>
+
+
+static inline unsigned long long cputime_to_expires(cputime_t expires)
+{
+ return (__force unsigned long long)expires;
+}
+
+static inline cputime_t expires_to_cputime(unsigned long long expires)
+{
+ return (__force cputime_t)expires;
+}
+
+struct cpu_timer_list {
+ struct list_head entry;
+ unsigned long long expires, incr;
+ struct task_struct *task;
+ int firing;
+};
+
+/*
+ * 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.
+ */
+#define CPUCLOCK_PID(clock) ((pid_t) ~((clock) >> 3))
+#define CPUCLOCK_PERTHREAD(clock) \
+ (((clock) & (clockid_t) CPUCLOCK_PERTHREAD_MASK) != 0)
+
+#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
+#define CLOCKFD CPUCLOCK_MAX
+#define CLOCKFD_MASK (CPUCLOCK_PERTHREAD_MASK|CPUCLOCK_CLOCK_MASK)
+
+#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)
+
+#define FD_TO_CLOCKID(fd) ((~(clockid_t) (fd) << 3) | CLOCKFD)
+#define CLOCKID_TO_FD(clk) ((unsigned int) ~((clk) >> 3))
+
+/* POSIX.1b interval timer structure. */
+struct k_itimer {
+ struct list_head list; /* free/ allocate list */
+ struct hlist_node t_hash;
+ 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 */
+ int it_requeue_pending; /* waiting to requeue this timer */
+#define REQUEUE_PENDING 1
+ int it_sigev_notify; /* notify word of sigevent struct */
+ 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 */
+ };
+ struct sigqueue *sigq; /* signal queue entry. */
+ union {
+ struct {
+ struct hrtimer timer;
+ ktime_t interval;
+ } real;
+ struct cpu_timer_list cpu;
+ struct {
+ unsigned int clock;
+ unsigned int node;
+ unsigned long incr;
+ unsigned long expires;
+ } mmtimer;
+ struct {
+ struct alarm alarmtimer;
+ ktime_t interval;
+ } alarm;
+ struct rcu_head rcu;
+ } it;
+};
+
+struct k_clock {
+ int (*clock_getres) (const clockid_t which_clock, struct timespec *tp);
+ int (*clock_set) (const clockid_t which_clock,
+ const struct timespec *tp);
+ int (*clock_get) (const clockid_t which_clock, struct timespec * tp);
+ int (*clock_adj) (const clockid_t which_clock, struct timex *tx);
+ int (*timer_create) (struct k_itimer *timer);
+ int (*nsleep) (const clockid_t which_clock, int flags,
+ struct timespec *, struct timespec __user *);
+ long (*nsleep_restart) (struct restart_block *restart_block);
+ 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);
+};
+
+extern struct k_clock clock_posix_cpu;
+extern struct k_clock clock_posix_dynamic;
+
+void posix_timers_register_clock(const clockid_t clock_id, struct k_clock *new_clock);
+
+/* function to call to trigger timer event */
+int posix_timer_event(struct k_itimer *timr, int si_private);
+
+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);
+
+bool posix_cpu_timers_can_stop_tick(struct task_struct *tsk);
+
+void set_process_cpu_timer(struct task_struct *task, unsigned int clock_idx,
+ cputime_t *newval, cputime_t *oldval);
+
+long clock_nanosleep_restart(struct restart_block *restart_block);
+
+void update_rlimit_cpu(struct task_struct *task, unsigned long rlim_new);
+
+#endif