[Question] How should I use the dylib class as a member of another class? about dylib

[martin-olivier]

Hello @AregevDev,

Sorry for my late response.

The dylib class should not go out of scope, or its loaded function pointers will not be valid anymore.

In your case, you should do like that:

class HostFXR
{
public:
    dylib lib;
    hostfxr_initialize_for_dotnet_command_line_fn initialize_for_dotnet_command_line_fn{};
    hostfxr_initialize_for_runtime_config_fn initialize_for_runtime_config_fn{};
    hostfxr_get_runtime_delegate_fn get_runtime_delegate_fn{};
    hostfxr_run_app_fn run_app_fn{};
    hostfxr_close_fn close_fn{};

    static HostFXR init()
    {
        size_t buffer_size = 0;
        get_hostfxr_path(nullptr, &buffer_size, nullptr);
        auto lib_path = static_cast<char_t *>(calloc(buffer_size, sizeof(char_t)));
        get_hostfxr_path(lib_path, &buffer_size, nullptr);

        dylib lib(lib_path);
        auto initialize_for_dotnet_command_line_fn = *lib.get_function<hostfxr_initialize_for_dotnet_command_line_fn>("hostfxr_initialize_for_dotnet_command_line");

        HostFXR fxr {
            .lib = std::move(lib),
            .initialize_for_dotnet_command_line_fn = initialize_for_dotnet_command_line_fn
        };

        printf("%p\n", fxr.initialize_for_dotnet_command_line_fn);

        return fxr;
    }
};