SDL/OOpenGL双缓冲内存泄漏

因此，我一直在尝试使用SDL和OpenGL为游戏制作自己的迷你引擎，主要游戏逻辑包含在singleton类中。但就我的一生而言，我不知道引擎的这个示例部分是如何发生内存泄漏的，尽管我很确定每当我调用SDL_GL_SwapBuffers时都会发生这种情况。泄漏大约为每隔两三秒4 K。我使用的是SDL 1.3；请帮我找泄漏的地方，过去一周我都快疯了！

主模块.h

#ifndef MAINMODULE_H
#define MAINMODULE_H
/// Includes
#include "SDL/SDL.h"
#include "SDL/SDL_opengl.h"
#include <string>
/// Define Statements (Screen elements)
#define MAINMODULE_WIDTH 800
#define MAINMODULE_HEIGHT 600
#define MAINMODULE_CAPTION "MainModule"
/// Define Statements (OpenGL memory usage)
#define MAINMODULE_RED_SIZE 8
#define MAINMODULE_GREEN_SIZE 8
#define MAINMODULE_BLUE_SIZE 8
#define MAINMODULE_ALPHA_SIZE 8
#define MAINMODULE_BUFFER_SIZE 32
#define MAINMODULE_DEPTH_SIZE 16
#define MAINMODULE_DOUBLEBUFFER 1 // 1 to Enable
#define MAINMODULE_FLAGS SDL_OPENGL
/// Define Statements (OpenGL elements)
#define MAINMODULE_CLEARCOLOR 1.0f, 1.0f, 1.0f, 1.0f
#define MAINMODULE_SHADEMODEL GL_SMOOTH
#define MAINMODULE_DEPTH_TEST 0 // 1 to Enable
class MainModule {
    private: // Constructor/Deconsctuctor
        MainModule();
        ~MainModule();
    private: // Class Variables
        static MainModule* _Instance;       // Singleton instance of the module.
        static int _Width;                  // Width of the game screen.
        static int _Height;                 // Height of the game screen.
        static std::string _Caption;        // Game screen caption/title.
        static SDL_Surface* _ScreenSurface; // Game screen as represented by the window.
        static SDL_Event* _Event;   // Events such as mouse/key input.
        static bool _IsInitialized;         // Has the engine been initialized?
        static bool _IsRunning;             // Is the engine running?
    public: // Get/Set Functions
        static inline int Width() { return _Width; }
        static inline int Height() { return _Height; }
        static inline std::string Caption() { return _Caption; }
        static inline bool IsInitialized() { return _IsInitialized; }
        static inline bool IsRunning() { return _IsRunning; }
        static void SetCaption(std::string caption);
    public: // Class Functions
        static void ConstructInstance();
        static void DeconstructInstance();
        static void InitializeModule();
        static void RunGameLogic();                         // Updates and renders game information.
};
#endif // MAINMODULE_H

主模块.ccp

/// Includes
#include "MainModule.h"
#include <iostream>
// Static Variable Declarations
MainModule* MainModule::_Instance = 0;
int MainModule::_Width = MAINMODULE_WIDTH;
int MainModule::_Height = MAINMODULE_HEIGHT;
std::string MainModule::_Caption = MAINMODULE_CAPTION;
SDL_Surface* MainModule::_ScreenSurface = 0;
SDL_Event* MainModule::_Event = 0;
bool MainModule::_IsInitialized = false;
bool MainModule::_IsRunning = false;
/// Constructor/Deconstructor
MainModule::MainModule() { }
MainModule::~MainModule() { 
    if (_Event != 0) delete _Event;
    if (_ScreenSurface != 0) SDL_FreeSurface(_ScreenSurface);
    SDL_Quit();
}
/// Set Functions
void MainModule::SetCaption(std::string caption)
{ _Caption = caption; if (_IsInitialized) SDL_WM_SetCaption(_Caption.c_str(), 0); }
/// Class Functions
void MainModule::ConstructInstance()
{ if (_Instance == 0) _Instance = new MainModule(); }
void MainModule::DeconstructInstance()
{ if (_Instance != 0) { delete _Instance; _Instance = 0; } }
void MainModule::InitializeModule() {
    ConstructInstance(); // Create an instance if the ConstructInstance function wasn't created before.
    if (_Instance == 0) { printf("MainModule instance not created properly./n"); return; } 
    // Initialize SDL.
    if (SDL_Init(SDL_INIT_EVERYTHING) != 0) { printf("SDL Initialization error: %s/n", SDL_GetError()); return; }
    // Set OpenGL memory usage.
    SDL_GL_SetAttribute(SDL_GL_RED_SIZE, MAINMODULE_RED_SIZE);
    SDL_GL_SetAttribute(SDL_GL_GREEN_SIZE, MAINMODULE_GREEN_SIZE);
    SDL_GL_SetAttribute(SDL_GL_BLUE_SIZE, MAINMODULE_BLUE_SIZE);
    SDL_GL_SetAttribute(SDL_GL_ALPHA_SIZE, MAINMODULE_ALPHA_SIZE);
    SDL_GL_SetAttribute(SDL_GL_BUFFER_SIZE, MAINMODULE_BUFFER_SIZE);
    SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, MAINMODULE_DEPTH_SIZE);
    SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, MAINMODULE_DOUBLEBUFFER);
    // Creates the screen and window.
    _ScreenSurface = SDL_SetVideoMode(MAINMODULE_WIDTH, MAINMODULE_HEIGHT, MAINMODULE_BUFFER_SIZE, MAINMODULE_FLAGS);
    if (_ScreenSurface == 0) { printf("ScreenSurface not created properly./n"); return; }
    SDL_WM_SetCaption(_Caption.c_str(), 0);
    (MAINMODULE_DEPTH_TEST == 1) ? glEnable(GL_DEPTH_TEST) : glDisable(GL_DEPTH_TEST);
    glClearColor(MAINMODULE_CLEARCOLOR);
    glShadeModel(GL_SMOOTH);
    _IsInitialized = true;
    _IsRunning = true;
    _Event = new SDL_Event();
}
void MainModule::RunGameLogic() {
    while (SDL_PollEvent(_Event)) { // Event handling loop
        switch (_Event->type) {
            case SDL_QUIT: // Exits out of game
            { _IsRunning = false; break; }
            case SDL_ACTIVEEVENT:
            { break; }
            case SDL_KEYDOWN: // Keyboard press down
            { break; }
            case SDL_KEYUP: // Keyboard press up
            { break; }
            case SDL_MOUSEMOTION: // Mouse movement
            { break; }
            case SDL_MOUSEBUTTONDOWN: // Mouse button down
            { break; }
            case SDL_MOUSEBUTTONUP: // Mouse button up
            { break; }
        }
    }
    // Rendering logic
    (MAINMODULE_DEPTH_TEST == 1) ? glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT) : glClear(GL_COLOR_BUFFER_BIT);
    SDL_GL_SwapBuffers();
}
/// Entry point for the program
int main(int argc, char** argv) {
    MainModule::InitializeModule();
    if (MainModule::IsInitialized()) { // If the modules initialized sucessfully
        while (MainModule::IsRunning()) { MainModule::RunGameLogic(); }
    }
    MainModule::DeconstructInstance();
    return 0;
}