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