te')); return $arr; } /* 遍历用户所有主题 * @param $uid 用户ID * @param int $page 页数 * @param int $pagesize 每页记录条数 * @param bool $desc 排序方式 TRUE降序 FALSE升序 * @param string $key 返回的数组用那一列的值作为 key * @param array $col 查询哪些列 */ function thread_tid_find_by_uid($uid, $page = 1, $pagesize = 1000, $desc = TRUE, $key = 'tid', $col = array()) { if (empty($uid)) return array(); $orderby = TRUE == $desc ? -1 : 1; $arr = thread_tid__find($cond = array('uid' => $uid), array('tid' => $orderby), $page, $pagesize, $key, $col); return $arr; } // 遍历栏目下tid 支持数组 $fid = array(1,2,3) function thread_tid_find_by_fid($fid, $page = 1, $pagesize = 1000, $desc = TRUE) { if (empty($fid)) return array(); $orderby = TRUE == $desc ? -1 : 1; $arr = thread_tid__find($cond = array('fid' => $fid), array('tid' => $orderby), $page, $pagesize, 'tid', array('tid', 'verify_date')); return $arr; } function thread_tid_delete($tid) { if (empty($tid)) return FALSE; $r = thread_tid__delete(array('tid' => $tid)); return $r; } function thread_tid_count() { $n = thread_tid__count(); return $n; } // 统计用户主题数 大数量下严谨使用非主键统计 function thread_uid_count($uid) { $n = thread_tid__count(array('uid' => $uid)); return $n; } // 统计栏目主题数 大数量下严谨使用非主键统计 function thread_fid_count($fid) { $n = thread_tid__count(array('fid' => $fid)); return $n; } ?>c - Memory Leak with SDL_SetRenderDrawColor when changing active window - Stack Overflow

科技改变生活-雨落星辰 - 所有的伟大,都源于一个勇敢的开始

    最新消息：雨落星辰是一个专注网站SEO优化、网站SEO诊断、搜索引擎研究、网络营销推广、网站策划运营及站长类的自媒体原创博客
    你的位置： 首页>programmer>c - Memory Leak with SDL_SetRenderDrawColor when changing active window - Stack Overflow

    c - Memory Leak with SDL_SetRenderDrawColor when changing active window - Stack Overflow

    programmeradmin4浏览0评论

    I create a simple window with SDL like this:

    int main(void)
{
    if (SDL_Init(SDL_INIT_VIDEO) != 0) {
        printf("SDL_Init Error: %s\n", SDL_GetError());
        return 1;
    }
    SDL_Window* window = SDL_CreateWindow("Hello SDL", SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, 640, 480, 0);
    
    if (window == NULL) {
        printf("SDL_CreateWindow Error: %s\n", SDL_GetError());
        return 1;
    }

    SDL_Renderer* renderer = SDL_CreateRenderer(window, -1, SDL_RENDERER_ACCELERATED);
    if (renderer == NULL) {
        printf("SDL_CreateRenderer Error: %s\n", SDL_GetError());
        return 1;
    }
    SDL_SetRenderDrawColor(renderer, 255, 255, 255, 255); // that's where the issue seems to come from
    
    SDL_RenderClear(renderer);
    SDL_RenderPresent(renderer);

    
    bool stop=false;
    SDL_Event event;
    
    while (!stop){
        if (SDL_PollEvent(&event)) {
            if (event.type==SDL_QUIT) {
                stop=true;
            }
        }
    }

    SDL_DestroyRenderer(renderer);
    SDL_DestroyWindow(window);
    IMG_Quit();
    SDL_Quit();

    return 0;
}

    when I run this code without changing active window, everything work fine. But if I change active window before closing the window (with SDL_QUIT event) then I got a 6957 bytes memory leak.

    I have investigated and found out that it came from the SDL_SetRenderDrawColor(renderer, 255, 255, 255, 255); Indeed, when removed, there are no remaining memory leaks

    I'm running a Linux Debian 12 with gcc and libsdl2-dev version 2.26.5 I found these memory leaks using AddressSanitizer

    What should I do to avoid these memory leaks ?

    I create a simple window with SDL like this:

    int main(void)
{
    if (SDL_Init(SDL_INIT_VIDEO) != 0) {
        printf("SDL_Init Error: %s\n", SDL_GetError());
        return 1;
    }
    SDL_Window* window = SDL_CreateWindow("Hello SDL", SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, 640, 480, 0);
    
    if (window == NULL) {
        printf("SDL_CreateWindow Error: %s\n", SDL_GetError());
        return 1;
    }

    SDL_Renderer* renderer = SDL_CreateRenderer(window, -1, SDL_RENDERER_ACCELERATED);
    if (renderer == NULL) {
        printf("SDL_CreateRenderer Error: %s\n", SDL_GetError());
        return 1;
    }
    SDL_SetRenderDrawColor(renderer, 255, 255, 255, 255); // that's where the issue seems to come from
    
    SDL_RenderClear(renderer);
    SDL_RenderPresent(renderer);

    
    bool stop=false;
    SDL_Event event;
    
    while (!stop){
        if (SDL_PollEvent(&event)) {
            if (event.type==SDL_QUIT) {
                stop=true;
            }
        }
    }

    SDL_DestroyRenderer(renderer);
    SDL_DestroyWindow(window);
    IMG_Quit();
    SDL_Quit();

    return 0;
}

    when I run this code without changing active window, everything work fine. But if I change active window before closing the window (with SDL_QUIT event) then I got a 6957 bytes memory leak.

    I have investigated and found out that it came from the SDL_SetRenderDrawColor(renderer, 255, 255, 255, 255); Indeed, when removed, there are no remaining memory leaks

    I'm running a Linux Debian 12 with gcc and libsdl2-dev version 2.26.5 I found these memory leaks using AddressSanitizer

    What should I do to avoid these memory leaks ?

    • c
    • memory-leaks
    • sdl-2
    • address-sanitizer
    Share Improve this question edited Feb 17 at 15:37 genpfault 52.1k12 gold badges91 silver badges148 bronze badges asked Feb 17 at 14:54 luke simluke sim 112 bronze badges New contributor luke sim is a new contributor to this site. Take care in asking for clarification, commenting, and answering. Check out our Code of Conduct.
    Add a comment  | 

    1 Answer 1

    Reset to default 0

    Do the SDL_Quit() before the IMG_Quit()

    It seems IMG_Quit() has to be last function called: https://wiki.libsdl./SDL2_image/IMG_Quit

    Also looks like best practice to have a specific IMG_Init() somewhere

    与本文相关的文章

    发布评论

    评论列表(0)

    1. 暂无评论