GlusterFS context(glusterfs_ctx) has a timer data structure(gf_timer_registert_t).
gf_timer_registert_t {
pthread_t th,
char fin, // finish
_gf_timer stale, // stale event list
_gf_timer active, // active event list
pthread_mutex_t lock
}
There are
- pthread
- active list
- stale list
- pthread lok
in glusterfs context timer. active and stale list date structure is _gf_timer, it is also gf timer event.
_gf_timer {
_gf_timer *next, *prev, // pointer to next and previous
timespec at, // time to execute the event
gf_timer_cbk_t callbk, // execute funcation
void data, // event data for callbk
xlator_t *xl // event translator
}
glusterfs_ctx timer
glusterfs_ctx will create a pthread, and pthread will execute gf_timer_proc() function.
The thread will get the timer event from active list and check the timestamp of event. if timestamp > current time, it will move the timer event from active list to stale list, and execute the callback function of timer event.
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