Nils O. Selåsdal
66 lines
1.9 KiB
C
66 lines
1.9 KiB
C
#ifndef UCORE_TIMERS_H_
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#define UCORE_TIMERS_H_
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#include <stddef.h>
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#include <sys/queue.h>
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#include <sys/time.h>
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#include "ucore_rbtree.h"
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struct UCTimer;
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struct UCTimers;
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//timer states
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enum {
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//not running
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UC_TIMER_INACTIVE = 0,
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//running
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UC_TIMER_ACTIVE = 1,
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//running and pending to be fired in this run of uc_timers_run
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UC_TIMER_PENDING = 2
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};
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typedef void (*uc_timer_cb)(struct UCTimers *timers, struct UCTimer *timer);
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struct UCTimer {
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//Internal members
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RBNode rb_node; //the RBNode will hold a data pointer to the
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//the UCTimer it's a member of. We might get rid of that member, and use CONTAINER_OF
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//to find the UCTimer from a RBNode
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//
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//absolute time when the timer should be fired
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struct timeval timeout;
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size_t seq; //needed to keep timeout unique
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//as the rbtree can only handle unique values
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unsigned char state;
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TAILQ_ENTRY(UCTimer) ready_entry; //entry in ready_list in UCTimers
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//External members
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//callback function
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uc_timer_cb callback;
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//user data for the callback
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void *cookie_ptr;
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int cookie_int;
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int cookie_int2;
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};
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struct UCTimers {
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RBTree timers;
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size_t seq; //used to generate unique timers
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TAILQ_HEAD(, UCTimer) ready_list; //pending timers to be fired while inside uc_timers_run
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};
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void uc_timer_remove(struct UCTimers *timers, struct UCTimer *timer);
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void uc_timers_init(struct UCTimers *t);
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void uc_timer_add(struct UCTimers *timers, struct UCTimer *timer, int sec, int usec);
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void uc_timer_remove(struct UCTimers *timers, struct UCTimer *timer);
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int uc_timers_first(const struct UCTimers *timers, struct timeval *first);
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size_t uc_timer_count(const struct UCTimers *timers);
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int uc_timer_running(const struct UCTimer *timer);
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int uc_timers_run(struct UCTimers *timers, const struct timeval *now);
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#endif
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