如何在C++/CLI中使用boost :: bind来绑定托管类的成员

我在本机C++类中使用boost :: signal,现在我在C++/CLI中编写.NET包装器,这样我就可以将本机C++回调公开为.NET事件.当我尝试使用boost :: bind来获取托管类的成员函数的地址时,我得到编译器错误3374,说我不能获取成员函数的地址,除非我创建一个委托实例.有谁知道如何使用boost :: bind绑定托管类的成员函数？

为了澄清,以下示例代码导致编译器错误3374:

#include 

public ref class Managed
{
public:
    Managed()
    {
        boost::bind(&Managed::OnSomeEvent, this);
    }

    void OnSomeEvent(void)
    {
    }
};

BKewl.. 10

虽然您的答案有效,但它会将您的一些实现暴露给全世界(Managed :: OnSomeEvent).如果您不希望人们通过调用OnSomeEvent()而无所事事地引发OnChange事件,则可以按如下方式更新Managed类(基于此建议):

public delegate void ChangeHandler(void);
typedef void (__stdcall *ChangeCallback)(void);

public ref class Managed
{
public:
    Managed(Native* Nat);
    ~Managed();

    event ChangeHandler^ OnChange;

private:
    void OnSomeEvent(void);
    Native* native;
    Callback* callback;
    GCHandle gch;
};

Managed::Managed(Native* Nat)
 : native(Nat)
{
    callback = new Callback;

    ChangeHandler^ handler = gcnew ChangeHandler( this, &Managed::OnSomeEvent );
    gch = GCHandle::Alloc( handler );
    System::IntPtr ip = Marshal::GetFunctionPointerForDelegate( handler );
    ChangeCallback cbFunc = static_cast( ip.ToPointer() );

    *callback = native->RegisterCallback(boost::bind( cbFunc ) );
}

Managed::~Managed()
{
    native->UnregisterCallback(*callback);
    delete callback;
    if ( gch.IsAllocated )
    {
        gch.Free();
    }
}

void Managed::OnSomeEvent(void)
{
    OnChange();
}

请注意使用的替代bind()形式.

虽然您的答案有效,但它会将您的一些实现暴露给全世界(Managed :: OnSomeEvent).如果您不希望人们通过调用OnSomeEvent()而无所事事地引发OnChange事件,则可以按如下方式更新Managed类(基于此建议):

public delegate void ChangeHandler(void);
typedef void (__stdcall *ChangeCallback)(void);

public ref class Managed
{
public:
    Managed(Native* Nat);
    ~Managed();

    event ChangeHandler^ OnChange;

private:
    void OnSomeEvent(void);
    Native* native;
    Callback* callback;
    GCHandle gch;
};

Managed::Managed(Native* Nat)
 : native(Nat)
{
    callback = new Callback;

    ChangeHandler^ handler = gcnew ChangeHandler( this, &Managed::OnSomeEvent );
    gch = GCHandle::Alloc( handler );
    System::IntPtr ip = Marshal::GetFunctionPointerForDelegate( handler );
    ChangeCallback cbFunc = static_cast( ip.ToPointer() );

    *callback = native->RegisterCallback(boost::bind( cbFunc ) );
}

Managed::~Managed()
{
    native->UnregisterCallback(*callback);
    delete callback;
    if ( gch.IsAllocated )
    {
        gch.Free();
    }
}

void Managed::OnSomeEvent(void)
{
    OnChange();
}

请注意使用的替代bind()形式.