// // Created by Cry on 2018-12-20. // #include "EventCache.h" SDL_bool EventQueue::init() { head = 0; tail = 0; size = 0; return SDL_TRUE; } SDL_bool EventQueue::push_event(SDL_Event event) { SDL_bool res; if (size >= CONTROL_EVENT_QUEUE_SIZE) { return SDL_FALSE; } if (is_full()) { printf("is is_full\n"); res = SDL_FALSE; } else { queue[head] = event; head = (head + 1) % CONTROL_EVENT_QUEUE_SIZE; size++; } // printf("queue push_event event ,head = %d , size = %ld \n", head, size); return res; } SDL_bool EventQueue::take_event(SDL_Event *event) { if (size == 0) { return SDL_FALSE; } *event = queue[tail]; tail = (tail + 1) % CONTROL_EVENT_QUEUE_SIZE; size--; // printf("queue take_event event ,tail = %d ,size = %ld \n", tail, size); if (size < 0 || size > CONTROL_EVENT_QUEUE_SIZE) { printf("when size is larger than max?? size = %ld ,max = %d \n", size, CONTROL_EVENT_QUEUE_SIZE); abort(); } return SDL_TRUE; } void EventQueue::destroy() { } int EventQueue::is_empty() { return head == tail; } int EventQueue::is_full() { return (head + 1) % CONTROL_EVENT_QUEUE_SIZE == tail; }