小编Vla*_*hin的帖子

我已经编译了一个C++程序,它在我的计算机上运行得非常好,但是如果我的朋友试图启动该程序,它libgcc_s_sw2-1.dll就会丢失.如何使用CMake将所有必需的GCC运行时库包含在程序中？

所以,我在res/drawable-hdpi(例如text.png)文件夹中有一个纹理,我如何加载这个纹理并用glBindTexture绑定它？

我在结构“matrix”中有 2 个构造函数。

matrix(const unsigned int m, const unsigned int n);\nmatrix(const std::vector<std::vector<double>> &elements);\n

当我这样称呼它时

matrix mat({{1},{1}});\n

它抛出错误

call of overloaded \xe2\x80\x98matrix(<brace-enclosed initializer list>)\xe2\x80\x99 is ambiguous\nnote: candidate: matrix::matrix(const std::vector<std::vector<double> >&)\nnote: candidate: matrix::matrix(const matrix&)\n

因此，它认为 {{1},{1}} - 是“矩阵”对象，但是如何呢？

我读了很多关于如何在MySQL中实现表情符号支持的文章，但是没有任何效果。

my.cnf：

[client]
default-character-set = utf8mb4
[mysqld]
character-set-server = utf8mb4
collation-server = utf8mb4_unicode_ci
character-set-client-handshake = FALSE
[mysql]
default-character-set = utf8mb4

测试：

mysql> SHOW VARIABLES WHERE Variable_name LIKE 'character\_set\_%' OR Variable_name LIKE 'collation%';
+--------------------------+--------------------+
| Variable_name            | Value              |
+--------------------------+--------------------+
| character_set_client     | utf8mb4            |
| character_set_connection | utf8mb4            |
| character_set_database   | utf8mb4            |
| character_set_filesystem | binary             |
| character_set_results    | utf8mb4            |
| character_set_server     | utf8mb4            |
| character_set_system     | utf8               |
| collation_connection     | utf8mb4_unicode_ci |
| …

最近,我从libevent切换到boost :: asio,一周后我注意到一件奇怪的事情:当我从客户端读取数据时,这些数据中的一些似乎是重复的,好像库不需要将其标记为已读(或类似的东西).我的"阅读"方法如下所示:

void client::doRead() {
    delete readBuffer; // getting rid of old data 
    readBuffer = new SerializedBuffer((uint) READ_BUFFER_SIZE);
    readBuffer->position(0);
    asio::async_read(socket, asio::buffer(readBuffer->bytes(), READ_BUFFER_SIZE),
            asio::transfer_at_least(1),
            boost::bind(&client::onRead, shared_from_this(), _1, _2));
}

std::mutex readMutex;
void client::onRead(const asio::error_code &err, size_t nbytes) {
    if (readMutex.try_lock()) {
        if (err) {
            stop();
            return;
        }

        readBuffer->rewind();
        uint limit = (uint) nbytes;
        readBuffer->limit(limit);

        // I've lost hope
        SerializedBuffer *sbuff = new SerializedBuffer(limit);
        memcpy(sbuff->bytes(), readBuffer->bytes(), limit);
        sbuff->limit(limit);

        // that's where I'm checking what I get
        Utils::print(sbuff->bytes(), limit);

        onReceivedData(shared_from_this(), sbuff);
        delete …