Linux通过改进的epoll实现对不同超时时间的数据包(2)

for ( tprev = &active, tcur = active;
    tcur && id != tcur->id;
    tprev = &tcur->next, tcur = tcur->next )
 { ; }
 if ( tcur == NULL )
 {
  error( 0, 0,
   "untimeout called for non-existent timer (%d)\n", id );
  return;
 }
 *tprev = tcur->next;
 tcur->next = free_list;
 free_list = tcur;
}