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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "stw_timer.h"
/* todo :
1. add jitter support
2. in case ticks take too much time add a quata and keep the time in the current bucket then speed up
hhaim
*/
void CTimerObj::Dump(FILE *fd){
fprintf(fd,"m_rotation_count :%lu \n", (ulong)m_rotation_count);
fprintf(fd,"m_last_update_tick :%lu \n", (ulong)m_last_update_tick);
fprintf(fd,"m_aging_ticks :%lu \n", (ulong)m_aging_ticks);
}
void CTimerWheelBucket::dump_link_list(void *userdata,tw_on_tick_cb_t cb,FILE *fd){
CTimerWheelLink *bucket, *next;
CTimerObj *tmr;
bucket = m_active_bucket;
tmr = (CTimerObj *)bucket->stw_next;
bool found=false;
if ((CTimerWheelLink *)tmr != bucket) {
fprintf(fd,"[%lu,\n",(ulong)m_bucket_index);
found=true;
}
while( (CTimerWheelLink *)tmr != bucket) {
next = (CTimerWheelLink *)tmr->m_links.stw_next;
tmr->Dump(fd);
cb(userdata,tmr);
tmr = (CTimerObj *)next;
}
if (found){
fprintf(fd,"]\n");
}
}
bool CTimerWheelBucket::do_tick(void *userdata,
tw_on_tick_cb_t cb,
int32_t limit){
CTimerObj * tmr;
int cnt=0;
while ( true ) {
tmr = timer_tick_get_next();
if (!tmr) {
break;
}
cb(userdata,tmr);
cnt++;
if (cnt>limit && (limit>0)) {
return(false);
}
}
timer_tick();
return(true);
}
void CTimerWheelBucket::timer_stats_dump(FILE *fd){
fprintf(fd,"wheel_size :%lu \n", (ulong)m_wheel_size);
fprintf(fd,"ticks :%lu \n", (ulong)m_ticks);
fprintf(fd,"bucket_index :%lu \n", (ulong)m_bucket_index);
fprintf(fd,"timer_active :%lu \n", (ulong)m_timer_active);
fprintf(fd,"timer_expired :%lu \n", (ulong)m_timer_expired);
fprintf(fd,"timer_hiwater_mark :%lu \n", (ulong)m_timer_hiwater_mark);
fprintf(fd,"timer_starts :%lu \n", (ulong)m_timer_starts);
fprintf(fd,"timer_cancelled :%lu \n", (ulong)m_timer_cancelled);
fprintf(fd,"m_timer_restart :%lu \n", (ulong)m_timer_restart);
}
RC_STW_t CTimerWheelBucket::timer_stop (CTimerObj *tmr)
{
CTimerWheelLink *next, *prev;
#ifdef TW_DEBUG
if (this == 0) {
return (RC_STW_NULL_WHEEL);
}
if (tmr == 0) {
return (RC_STW_NULL_TMR);
}
if (m_magic_tag != MAGIC_TAG ) {
return (RC_STW_INVALID_WHEEL);
}
#endif
next = tmr->m_links.stw_next;
if (next) {
prev = tmr->m_links.stw_prev;
next->stw_prev = prev;
prev->stw_next = next;
tmr->m_links.stw_next = 0; /* 0 == tmr is free */
tmr->m_links.stw_prev = 0;
/*
* stats bookkeeping
*/
m_timer_active--;
m_timer_cancelled++;
}
return (RC_STW_OK);
}
RC_STW_t CTimerWheelBucket::Delete() {
uint32_t j;
CTimerWheelLink *spoke;
CTimerObj *tmr;
if (this == 0) {
return (RC_STW_NULL_WHEEL);
}
if (m_magic_tag != MAGIC_TAG ) {
return (RC_STW_INVALID_WHEEL);
}
for (j = 0; j < m_wheel_size; j++) {
spoke = &m_buckets[j];
tmr = (CTimerObj *)spoke->stw_next;
while ( (CTimerWheelLink *)tmr != spoke) {
timer_stop(tmr);
tmr = (CTimerObj *)spoke->stw_next;
} /* end while */
} /* end for */
/*
* clear the magic so we do not mistakenly access this wheel
*/
m_magic_tag = 0;
/*
* now free the wheel structures
*/
free(m_buckets);
m_buckets=0;
return (RC_STW_OK);
}
RC_STW_t CTimerWheelBucket::Create(uint32_t wheel_size){
uint32_t j;
CTimerWheelLink *bucket;
if (wheel_size < STW_MIN_WHEEL_SIZE || wheel_size > STW_MAX_WHEEL_SIZE) {
return (RC_STW_INVALID_WHEEL_SIZE);
}
m_buckets = (CTimerWheelLink *)malloc(wheel_size * sizeof(CTimerWheelLink));
if (m_buckets == 0) {
return (RC_STW_NO_RESOURCES);
}
m_magic_tag = MAGIC_TAG;
m_ticks = 0;
m_bucket_index = 0;
m_wheel_size = wheel_size;
m_timer_hiwater_mark = 0;
m_timer_active = 0;
m_timer_cancelled=0;
m_timer_expired=0;
m_timer_starts=0;
m_timer_restart=0;
bucket = &m_buckets[0];
m_active_bucket=bucket;
m_active_tick_timer = m_active_bucket;
/* link list point to itself */
for (j = 0; j < wheel_size; j++) {
bucket->stw_next = bucket;
bucket->stw_prev = bucket;
bucket++;
}
return (RC_STW_OK);
}
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