2 * Copyright (c) 2016 - 2017 Samsung Electronics Co., Ltd All Rights Reserved
4 * Licensed under the Apache License, Version 2.0 (the License);
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an AS IS BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
18 using System.Collections.Generic;
21 using System.Runtime.InteropServices;
23 namespace Tizen.System
26 /// The class for CPU usage per process.
28 /// <since_tizen> 3 </since_tizen>
29 public class ProcessCpuUsage
32 private Interop.RuntimeInfo.ProcessCpuUsage[] Usages;
35 /// The constructor of ProcessCpuUsage class.
37 /// <since_tizen> 4 </since_tizen>
38 /// <param name="pid">List of unique process ids.</param>
39 /// <privilege>http://tizen.org/privilege/systemmonitor</privilege>
40 /// <exception cref="ArgumentException">Thrown when the <paramref name="pid"/> is empty.</exception>
41 /// <exception cref="IOException">Thrown when an I/O error occurs while reading from the system or requesting to the resource management daemon.</exception>
42 /// <exception cref="OutOfMemoryException">Thrown when the memory is not enough to allocate.</exception>
43 /// <exception cref="UnauthorizedAccessException">Thrown when the caller does not have privilege to use this method.</exception>
44 public ProcessCpuUsage(IEnumerable<int> pid)
50 /// The number of usage entries.
52 /// <since_tizen> 4 </since_tizen>
53 public int Count { get; internal set; }
56 /// Gets the amount of time this process has been scheduled in user mode.
58 /// <since_tizen> 4 </since_tizen>
59 /// <param name="pid">The process id.</param>
60 /// <returns>The amount of time <paramref name="pid"/> has been scheduled in user mode (clock ticks).</returns>
61 /// <exception cref="ArgumentException">Thrown when the <paramref name="pid"/> is invalid.</exception>
62 public uint GetUTime(int pid)
64 for (int i = 0; i < Count; i++)
66 return Usages[i].UTime;
68 Log.Error(InformationErrorFactory.LogTag, "Invalid pid");
69 InformationErrorFactory.ThrowException(InformationError.InvalidParameter);
74 /// Gets the amount of time this process has been scheduled in kernel mode.
76 /// <since_tizen> 4 </since_tizen>
77 /// <param name="pid">The process id.</param>
78 /// <returns>The amount of time <paramref name="pid"/> has been scheduled in kernel mode (clock ticks).</returns>
79 /// <exception cref="ArgumentException">Thrown when the <paramref name="pid"/> is invalid.</exception>
80 public uint GetSTime(int pid)
82 for (int i = 0; i < Count; i++)
84 return Usages[i].STime;
86 Log.Error(InformationErrorFactory.LogTag, "Invalid pid");
87 InformationErrorFactory.ThrowException(InformationError.InvalidParameter);
92 /// Update the process CPU usage to the latest.
94 /// <since_tizen> 4 </since_tizen>
95 /// <param name="pid">List of unique process ids.</param>
96 /// <privilege>http://tizen.org/privilege/systemmonitor</privilege>
97 /// <exception cref="ArgumentException">Thrown when the <paramref name="pid"/> is empty.</exception>
98 /// <exception cref="IOException">Thrown when an I/O error occurs while reading from the system or requesting to the resource management daemon.</exception>
99 /// <exception cref="OutOfMemoryException">Thrown when the memory is not enough to allocate.</exception>
100 /// <exception cref="UnauthorizedAccessException">Thrown when the caller does not have privilege to use this method.</exception>
101 public void Update(IEnumerable<int> pid)
103 InformationError ret;
105 Pids = pid.ToArray<int>();
106 IntPtr ptr = new IntPtr();
107 Count = Pids.Count<int>();
109 ret = Interop.RuntimeInfo.GetProcessCpuUsage(Pids, Count, ref ptr);
110 if (ret != InformationError.None)
112 Log.Error(InformationErrorFactory.LogTag, "Interop failed to get Process cpu usage");
113 InformationErrorFactory.ThrowException(ret);
116 Usages = new Interop.RuntimeInfo.ProcessCpuUsage[Count];
117 for (int i = 0; i < Count; i++)
119 Usages[i] = Marshal.PtrToStructure<Interop.RuntimeInfo.ProcessCpuUsage>(ptr);
120 ptr += Marshal.SizeOf<Interop.RuntimeInfo.ProcessCpuUsage>();