/
ProcessCpuUsage.cs
executable file
·124 lines (112 loc) · 5.29 KB
/
ProcessCpuUsage.cs
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/*
* Copyright (c) 2016 - 2017 Samsung Electronics Co., Ltd All Rights Reserved
*
* 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.
*/
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Runtime.InteropServices;
namespace Tizen.System
{
/// <summary>
/// The class for CPU usage per process.
/// </summary>
/// <since_tizen> 3 </since_tizen>
public class ProcessCpuUsage
{
private int[] Pids;
private Interop.RuntimeInfo.ProcessCpuUsage[] Usages;
/// <summary>
/// The constructor of ProcessCpuUsage class.
/// </summary>
/// <since_tizen> 4 </since_tizen>
/// <param name="pid">List of unique process ids.</param>
/// <privilege>http://tizen.org/privilege/systemmonitor</privilege>
/// <exception cref="ArgumentException">Thrown when the <paramref name="pid"/> is empty.</exception>
/// <exception cref="IOException">Thrown when an I/O error occurs while reading from the system or requesting to the resource management daemon.</exception>
/// <exception cref="OutOfMemoryException">Thrown when the memory is not enough to allocate.</exception>
/// <exception cref="UnauthorizedAccessException">Thrown when the caller does not have privilege to use this method.</exception>
public ProcessCpuUsage(IEnumerable<int> pid)
{
Update(pid);
}
/// <summary>
/// The number of usage entries.
/// </summary>
/// <since_tizen> 4 </since_tizen>
public int Count { get; internal set; }
/// <summary>
/// Gets the amount of time this process has been scheduled in user mode.
/// </summary>
/// <since_tizen> 4 </since_tizen>
/// <param name="pid">The process id.</param>
/// <returns>The amount of time <paramref name="pid"/> has been scheduled in user mode (clock ticks).</returns>
/// <exception cref="ArgumentException">Thrown when the <paramref name="pid"/> is invalid.</exception>
public uint GetUTime(int pid)
{
for (int i = 0; i < Count; i++)
if (pid == Pids[i])
return Usages[i].UTime;
Log.Error(InformationErrorFactory.LogTag, "Invalid pid");
InformationErrorFactory.ThrowException(InformationError.InvalidParameter);
return 0;
}
/// <summary>
/// Gets the amount of time this process has been scheduled in kernel mode.
/// </summary>
/// <since_tizen> 4 </since_tizen>
/// <param name="pid">The process id.</param>
/// <returns>The amount of time <paramref name="pid"/> has been scheduled in kernel mode (clock ticks).</returns>
/// <exception cref="ArgumentException">Thrown when the <paramref name="pid"/> is invalid.</exception>
public uint GetSTime(int pid)
{
for (int i = 0; i < Count; i++)
if (pid == Pids[i])
return Usages[i].STime;
Log.Error(InformationErrorFactory.LogTag, "Invalid pid");
InformationErrorFactory.ThrowException(InformationError.InvalidParameter);
return 0;
}
/// <summary>
/// Update the process CPU usage to the latest.
/// </summary>
/// <since_tizen> 4 </since_tizen>
/// <param name="pid">List of unique process ids.</param>
/// <privilege>http://tizen.org/privilege/systemmonitor</privilege>
/// <exception cref="ArgumentException">Thrown when the <paramref name="pid"/> is empty.</exception>
/// <exception cref="IOException">Thrown when an I/O error occurs while reading from the system or requesting to the resource management daemon.</exception>
/// <exception cref="OutOfMemoryException">Thrown when the memory is not enough to allocate.</exception>
/// <exception cref="UnauthorizedAccessException">Thrown when the caller does not have privilege to use this method.</exception>
public void Update(IEnumerable<int> pid)
{
InformationError ret;
Pids = pid.ToArray<int>();
IntPtr ptr = new IntPtr();
Count = Pids.Count<int>();
ret = Interop.RuntimeInfo.GetProcessCpuUsage(Pids, Count, ref ptr);
if (ret != InformationError.None)
{
Log.Error(InformationErrorFactory.LogTag, "Interop failed to get Process cpu usage");
InformationErrorFactory.ThrowException(ret);
}
Usages = new Interop.RuntimeInfo.ProcessCpuUsage[Count];
for (int i = 0; i < Count; i++)
{
Usages[i] = Marshal.PtrToStructure<Interop.RuntimeInfo.ProcessCpuUsage>(ptr);
ptr += Marshal.SizeOf<Interop.RuntimeInfo.ProcessCpuUsage>();
}
}
}
}