iv_time(3) ivykis programmer's manual iv_time(3)NAME
iv_now, iv_validate_now, iv_invalidate_now - ivykis time handling
SYNOPSIS
#include <iv.h>
extern struct timespec iv_now;
void iv_validate_now(void);
void iv_invalidate_now(void);
DESCRIPTION
iv_now is a global variable that reflects the current time-of-day. Applications written to the ivykis API generally require to know the
current time-of-day in many places, and therefore effort is done to cache this quantity.
The contents of iv_now might be stale. Calling the function iv_validate_now ensures that the current contents of iv_now are up-to-date.
The function iv_invalidate_now is called to invalidate the currently cached time-of-day. This function should be called after any opera-
tion that takes a significant amount of wall clock time.
SEE ALSO ivykis(3), iv_examples(3)ivykis 2003-03-29 iv_time(3)
Check Out this Related Man Page
iv_timer(3) ivykis programmer's manual iv_timer(3)NAME
iv_timer_register, iv_timer_unregister, iv_timer_registered - deal with ivykis timers
SYNOPSIS
#include <iv.h>
struct iv_timer {
struct timespec expires;
void *cookie;
void (*handler)(void *);
};
void IV_TIMER_INIT(struct iv_timer *timer);
void iv_timer_register(struct iv_timer *timer);
void iv_timer_unregister(struct iv_timer *timer);
int iv_timer_registered(struct iv_timer *timer);
DESCRIPTION
The functions iv_timer_register and iv_timer_unregister register, respectively unregister, a timer with the current thread's ivykis event
loop. iv_timer_registered on a timer returns true if that timer is currently registered with ivykis.
When a timer that is registered becomes 'ready', due to the current system clock value becoming greater than or equal to the timer's
->expires member field, the callback function specified by ->handler is called in the thread that the timer was registered in, with
->cookie as its first and sole argument. When this happens, the timer is transparently unregistered.
The application is allowed to change the ->cookie and ->handler members at any time. The application is not allowed to change the
->expires member while the timer is registered.
A given struct iv_timer can only be registered in one thread at a time, and a timer can only be unregistered in the thread that it was reg-
istered from.
There is no limit on the number of timers registered at once.
See iv_examples(3) for programming examples.
SEE ALSO ivykis(3), iv_examples(3)ivykis 2010-08-15 iv_timer(3)
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