LocalResourceStream.hpp

/*
 * LocalResourceStream.hpp
 *
 * Copyright (C) 2020 by RStudio, PBC
 *
 * Unless you have received this program directly from RStudio pursuant to the terms of a commercial license agreement
 * with RStudio, then this program is licensed to you under the following terms:
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated
 * documentation files (the "Software"), to deal in the Software without restriction, including without limitation the
 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
 * WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
 * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 */
 
#ifndef LAUNCHER_PLUGINS_LOCAL_RESOURCE_STREAM_HPP
#define LAUNCHER_PLUGINS_LOCAL_RESOURCE_STREAM_HPP
 
#include <api/stream/AbstractTimedResourceStream.hpp>
 
namespace rstudio {
namespace launcher_plugins {
namespace local {
 
class LocalResourceStream : public api::AbstractTimedResourceStream
{
public:
   LocalResourceStream(
      system::TimeDuration in_frequency,
      const api::ConstJobPtr& in_job,
      comms::AbstractLauncherCommunicatorPtr in_launcherCommunicator);
 
private:
   Error getCpuPercent(double& out_cpuPercent);
 
   Error getCpuSeconds(double& out_cpuTime);
 
   Error getMem(double& out_physMem, double& out_virtMem);
 
   Error onInitialize() override;
 
   Error pollResourceUtilData(api::ResourceUtilData& out_data) override;
 
   // The PID of the process of the job.
   pid_t m_pid;
 
   // The last observed number of system ticks. Used to calculate CPU Percent.
   clock_t m_lastSysTicks;
 
   // The last observed number process ticks. Used to calculate CPU Percent.
   clock_t m_lastProcTicks;
 
   // The number of clock ticks per second. Used to calculate CPU Time.
   const double m_clockTicksPerSecond;
 
   // The number of bytes per page of memory. Used to calculate Physical and Virtual memory MB.
   const double m_bytesPerPage;
};
 
} // namespace local
} // namespace launcher_plugins
} // namespace rstudio
 
#endif