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author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /include/linux/timer.h | |
download | linux-3.10-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz linux-3.10-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.bz2 linux-3.10-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.zip |
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'include/linux/timer.h')
-rw-r--r-- | include/linux/timer.h | 102 |
1 files changed, 102 insertions, 0 deletions
diff --git a/include/linux/timer.h b/include/linux/timer.h new file mode 100644 index 00000000000..90db1cc62dd --- /dev/null +++ b/include/linux/timer.h @@ -0,0 +1,102 @@ +#ifndef _LINUX_TIMER_H +#define _LINUX_TIMER_H + +#include <linux/config.h> +#include <linux/list.h> +#include <linux/spinlock.h> +#include <linux/stddef.h> + +struct tvec_t_base_s; + +struct timer_list { + struct list_head entry; + unsigned long expires; + + spinlock_t lock; + unsigned long magic; + + void (*function)(unsigned long); + unsigned long data; + + struct tvec_t_base_s *base; +}; + +#define TIMER_MAGIC 0x4b87ad6e + +#define TIMER_INITIALIZER(_function, _expires, _data) { \ + .function = (_function), \ + .expires = (_expires), \ + .data = (_data), \ + .base = NULL, \ + .magic = TIMER_MAGIC, \ + .lock = SPIN_LOCK_UNLOCKED, \ + } + +/*** + * init_timer - initialize a timer. + * @timer: the timer to be initialized + * + * init_timer() must be done to a timer prior calling *any* of the + * other timer functions. + */ +static inline void init_timer(struct timer_list * timer) +{ + timer->base = NULL; + timer->magic = TIMER_MAGIC; + spin_lock_init(&timer->lock); +} + +/*** + * timer_pending - is a timer pending? + * @timer: the timer in question + * + * timer_pending will tell whether a given timer is currently pending, + * or not. Callers must ensure serialization wrt. other operations done + * to this timer, eg. interrupt contexts, or other CPUs on SMP. + * + * return value: 1 if the timer is pending, 0 if not. + */ +static inline int timer_pending(const struct timer_list * timer) +{ + return timer->base != NULL; +} + +extern void add_timer_on(struct timer_list *timer, int cpu); +extern int del_timer(struct timer_list * timer); +extern int __mod_timer(struct timer_list *timer, unsigned long expires); +extern int mod_timer(struct timer_list *timer, unsigned long expires); + +extern unsigned long next_timer_interrupt(void); + +/*** + * add_timer - start a timer + * @timer: the timer to be added + * + * The kernel will do a ->function(->data) callback from the + * timer interrupt at the ->expired point in the future. The + * current time is 'jiffies'. + * + * The timer's ->expired, ->function (and if the handler uses it, ->data) + * fields must be set prior calling this function. + * + * Timers with an ->expired field in the past will be executed in the next + * timer tick. + */ +static inline void add_timer(struct timer_list * timer) +{ + __mod_timer(timer, timer->expires); +} + +#ifdef CONFIG_SMP + extern int del_timer_sync(struct timer_list *timer); + extern int del_singleshot_timer_sync(struct timer_list *timer); +#else +# define del_timer_sync(t) del_timer(t) +# define del_singleshot_timer_sync(t) del_timer(t) +#endif + +extern void init_timers(void); +extern void run_local_timers(void); +extern void it_real_fn(unsigned long); + +#endif |