C++简单动态数组缓存的管理实现

#include <iostream>
#include <vector>
#include <cstring> // for std::memset

class BufferManager {
public:
    BufferManager(size_t bufferCount, size_t bufferSize) {
        buffers.resize(bufferCount, std::vector<char>(bufferSize));
    }

    void* getBuffer(size_t index) {
        if (index < buffers.size()) {
            return buffers[index].data();
        } else {
            std::cerr << "Buffer index out of range." << std::endl;
            return nullptr;
        }
    }

    void clearBuffer(size_t index) {
        if (index < buffers.size()) {
            std::memset(buffers[index].data(), 0, buffers[index].size());
            std::cout << "Buffer " << index << " cleared." << std::endl;
        } else {
            std::cerr << "Buffer index out of range." << std::endl;
        }
    }

    void releaseBuffers() {
        buffers.clear();
        std::cout << "All buffers released." << std::endl;
    }

    size_t getBufferCount() const {
        return buffers.size();
    }

private:
    std::vector<std::vector<char>> buffers;
};

int main() {
    const size_t bufferCount = 16;
    const size_t bufferSize = 100 * 1024; // 100KB

    BufferManager bufferManager(bufferCount, bufferSize);

    // 访问并使用缓冲区
    for (size_t i = 0; i < bufferManager.getBufferCount(); ++i) {
        char* buffer = static_cast<char*>(bufferManager.getBuffer(i));
        if (buffer) {
            // 填充数据
            std::fill(buffer, buffer + bufferSize, static_cast<char>(i + 'A'));
            std::cout << "Buffer " << i << " initialized with character: " << static_cast<char>(i + 'A') << std::endl;
        }
    }

    // 清空某个缓冲区
    bufferManager.clearBuffer(5);

    // 释放所有缓冲区
    bufferManager.releaseBuffers();

    return 0;
}