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EventCache.cpp

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// 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;

}