com_osvr_example_DummyDetectAndCreateAsync.cpp

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// Copyright 2014 Sensics, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

// Internal Includes
#include <osvr/PluginKit/PluginKit.h>

// Library/third-party includes
// - none

// Standard includes
#include <iostream>

// Anonymous namespace to avoid symbol collision
namespace {
OSVR_MessageType dummyMessage;

class DummyDevice {
  public:
    DummyDevice(OSVR_PluginRegContext ctx) {
        m_dev.initAsync(ctx, "MyAsyncDevice");

        m_dev.registerUpdateCallback(this);
    }

    OSVR_ReturnCode update() {
        // block on waiting for data.
        // once we have enough, send it.
        const char mydata[] = "something";
        m_dev.sendData(dummyMessage, mydata);
        return OSVR_RETURN_SUCCESS;
    }

  private:
    osvr::pluginkit::DeviceToken m_dev;
};

class HardwareDetection {
  public:
    HardwareDetection() : m_found(false) {}
    OSVR_ReturnCode operator()(OSVR_PluginRegContext ctx) {

        std::cout << "PLUGIN: Got a hardware detection request" << std::endl;
        if (!m_found) {
            std::cout << "PLUGIN: We have detected our fake device! Doing "
                         "setup stuff!" << std::endl;
            m_found = true;

            osvr::pluginkit::registerObjectForDeletion(ctx,
                                                       new DummyDevice(ctx));
        }
        return OSVR_RETURN_SUCCESS;
    }

  private:
    bool m_found;
};
} // namespace

OSVR_PLUGIN(com_osvr_example_DummyDetectAndCreateAsync) {
    osvrDeviceRegisterMessageType(ctx, "DummyMessage", &dummyMessage);

    osvr::pluginkit::PluginContext context(ctx);

    context.registerHardwareDetectCallback(new HardwareDetection());

    return OSVR_RETURN_SUCCESS;
}