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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-17 02:20:36 +0400
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-17 02:20:36 +0400
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /include/linux/timer.h
downloadlinux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.xz
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.h102
1 files changed, 102 insertions, 0 deletions
diff --git a/include/linux/timer.h b/include/linux/timer.h
new file mode 100644
index 000000000000..90db1cc62ddd
--- /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