void heartbeat_finish(heartbeat_t* hb) {
if (hb != NULL) {
pthread_mutex_destroy(&hb->mutex);
free(hb->window);
if(hb->text_file != NULL) {
hb_flush_buffer(hb);
fclose(hb->text_file);
}
remove(hb->filename);
/*TODO : need to deallocate log */
free(hb);
}
}
/**
* Registers a heartbeat
* @param hb pointer to heartbeat_t
* @param tag integer
*/
int64_t heartbeat( heartbeat_t* hb, int tag )
{
struct timespec time_info;
int64_t time;
int64_t old_last_time = hb->last_timestamp;
//printf("Registering Heartbeat\n");
clock_gettime( CLOCK_REALTIME, &time_info );
time = ( (int64_t) time_info.tv_sec * 1000000000 + (int64_t) time_info.tv_nsec );
pthread_mutex_lock(&hb->mutex);
hb->last_timestamp = time;
if(hb->first_timestamp == -1) {
//printf("In heartbeat - first time stamp\n");
hb->first_timestamp = time;
hb->last_timestamp = time;
hb->window[0] = 0;
//printf(" - accessing state and log\n");
hb->log[0].beat = hb->state->counter;
hb->log[0].tag = tag;
hb->log[0].timestamp = time;
hb->log[0].window_rate = 0;
hb->log[0].instant_rate = 0;
hb->log[0].global_rate = 0;
hb->state->counter++;
hb->state->buffer_index++;
hb->state->valid = 1;
}
else {
//printf("In heartbeat - NOT first time stamp - read index = %d\n",hb->state->read_index );
int index = hb->state->buffer_index;
hb->last_timestamp = time;
double window_heartrate = hb_window_average(hb, time-old_last_time);
double global_heartrate =
(((double) hb->state->counter+1) /
((double) (time - hb->first_timestamp)))*1000000000.0;
double instant_heartrate = 1.0 /(((double) (time - old_last_time))) *
1000000000.0;
hb->log[index].beat = hb->state->counter;
hb->log[index].tag = tag;
hb->log[index].timestamp = time;
hb->log[index].window_rate = window_heartrate;
hb->log[index].instant_rate = instant_heartrate;
hb->log[index].global_rate = global_heartrate;
hb->state->buffer_index++;
hb->state->counter++;
hb->state->read_index++;
if(hb->state->buffer_index%hb->state->buffer_depth == 0) {
if(hb->text_file != NULL)
hb_flush_buffer(hb);
hb->state->buffer_index = 0;
}
if(hb->state->read_index%hb->state->buffer_depth == 0) {
hb->state->read_index = 0;
}
}
pthread_mutex_unlock(&hb->mutex);
return time;
}