HRESULT XGameSaveCreateUpdate(  
         XGameSaveContainerHandle container,  
         const char* containerDisplayName,  
         XGameSaveUpdateHandle* updateContext  
)  

// SYNC Write - should not be called on a time sensitive thread 
//              as this will block until the operation is complete 
void Sample::_SaveDataSync(const char* containerName, const char* containerDisplayName) 
{ 
    HRESULT hr; 
    XGameSaveContainerHandle containerContext; 
    XGameSaveUpdateHandle updateContext; 
  
    hr = XGameSaveCreateContainer(_provider, containerName, &containerContext); 
    if (SUCCEEDED(hr)) 
    { 
        hr = XGameSaveCreateUpdate(containerContext, containerDisplayName, &updateContext); 
    } 
    if (SUCCEEDED(hr)) 
    { 
        hr = XGameSaveSubmitBlobWrite(updateContext, "WorldState", _worldState.data(), _worldState.size()); 
    } 
    if (SUCCEEDED(hr)) 
    { 
        hr = XGameSaveSubmitBlobWrite(updateContext, "PlayerState", _playerState.data(), _playerState.size()); 
    } 
    if (SUCCEEDED(hr)) 
    { 
        hr = XGameSaveSubmitBlobWrite(updateContext, "PlayerInventory", _playerInventory.data(), _playerInventory.size()); 
    } 
    if (SUCCEEDED(hr)) 
    { 
        if (_clearLevelProgress) 
        { 
            hr = XGameSaveSubmitBlobDelete(updateContext, "LevelProgress"); 
        } 
    } 
  
    if (SUCCEEDED(hr)) 
    { 
        hr = XGameSaveSubmitUpdate(updateContext); 
    } 
  
    if (updateContext) 
    { 
        XGameSaveCloseUpdate(updateContext); 
    } 
    if (containerContext) 
    { 
        XGameSaveCloseContainer(containerContext); 
    } 
  
    _HandleContainerUpdateErrors(hr); 
} 
  
  
void Sample::_HandleContainerUpdateErrors(HRESULT hr) 
{ 
    switch (hr) 
    { 
    case E_GS_INVALID_CONTAINER_NAME: 
        // tried to access a container with an invalid name 
        break; 
    case E_GS_OUT_OF_LOCAL_STORAGE: 
        // storage location is full, let the user know that saves won't work till this is fixed 
        break; 
    case E_GS_UPDATE_TOO_BIG: 
        // the blob that we provided was too big, can't be larger than GS_MAX_BLOB_SIZE 
        break; 
    case E_GS_QUOTA_EXCEEDED: 
        // the update we did was larger than our overall quota, need to track that! (see XGameSaveQueryRemainingQuota & XGameSaveQueryRemainingQuotaAsync) 
        break; 
    case E_GS_CONTAINER_NOT_IN_SYNC: 
    case E_GS_CONTAINER_SYNC_FAILED: 
        // need to sync and we are offline ? 
        break; 
    case E_GS_HANDLE_EXPIRED: 
        // need to re-initialize since another device has taken 
        // ownership while we were suspended and/or busy 
        break; 
    } 
}

// ASYNC Write - can be kicked off from a time sensitive thread 
//               actual work and completion will be scheduled base upon 
//               the configuration of the async_queue tied to the XAsyncBlock. 
void Sample::_SaveDataAsync(const char* containerName, const char* containerDisplayName) 
{ 
    struct SaveContext 
    { 
        SaveContext(Sample* s) : self(s), containerContext(nullptr), updateContext(nullptr) {} 
        ~SaveContext() 
        { 
            if (updateContext) 
            { 
                XGameSaveCloseUpdate(updateContext); 
            } 
            if (containerContext) 
            { 
                XGameSaveCloseContainer(containerContext); 
            } 
        } 
  
        XAsyncBlock async; 
        XGameSaveContainerHandle containerContext; 
        XGameSaveUpdateHandle updateContext; 
        Sample* self; 
    }; 
  
    HRESULT hr; 
    SaveContext* saveContext = new SaveContext(this); 
    if (saveContext == nullptr) 
    { 
        hr = E_OUTOFMEMORY; 
    } 
    if (SUCCEEDED(hr)) 
    { 
        saveContext->async.context = saveContext; 
        saveContext->async.callback = [](XAsyncBlock* async) 
        { 
            auto ctx = reinterpret_cast<SaveContext*>(async->context); 
            auto self = ctx->self; 
            HRESULT hr = XGameSaveSubmitUpdateResult(async); 
            self->_HandleContainerUpdateErrors(hr); 
            delete ctx; 
        }; 
    } 
  
    if (SUCCEEDED(hr)) 
    { 
        hr = XGameSaveCreateContainer(_provider, containerName, &saveContext->containerContext); 
    } 
    if (SUCCEEDED(hr)) 
    { 
        hr = XGameSaveCreateUpdate(saveContext->containerContext, containerDisplayName, &saveContext->updateContext); 
    } 
  
    if (SUCCEEDED(hr)) 
    { 
        hr = XGameSaveSubmitBlobWrite(saveContext->updateContext, "WorldState", _worldState.data(), _worldState.size()); 
    } 
    if (SUCCEEDED(hr)) 
    { 
        hr = XGameSaveSubmitBlobWrite(saveContext->updateContext, "PlayerState", _playerState.data(), _playerState.size()); 
    } 
    if (SUCCEEDED(hr)) 
    { 
        hr = XGameSaveSubmitBlobWrite(saveContext->updateContext, "PlayerInventory", _playerInventory.data(), _playerInventory.size()); 
    } 
    if (SUCCEEDED(hr)) 
    { 
        if (_clearLevelProgress) 
        { 
            hr = XGameSaveSubmitBlobDelete(saveContext->updateContext, "LevelProgress"); 
        } 
    } 
    if (SUCCEEDED(hr)) 
    { 
        hr = XGameSaveSubmitUpdateAsync(saveContext->updateContext, &saveContext->async); 
    } 
    if (SUCCEEDED(hr)) 
    { 
        // context is now owned by the async 
        saveContext = nullptr; 
    } 
  
    // if there was any error we need to cleanup the saveContext 
    if (saveContext) 
    { 
        delete saveContext; 
    } 
  
}