programs/taskmgr/priority.c

   1 /*
   2  *  ReactOS Task Manager
   3  *
   4  *  priority.c
   5  *
   6  *  Copyright (C) 1999 - 2001  Brian Palmer  <brianp@reactos.org>
   7  *  Copyright (C) 2008  Vladimir Pankratov
   8  *
   9  * This library is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU Lesser General Public
  11  * License as published by the Free Software Foundation; either
  12  * version 2.1 of the License, or (at your option) any later version.
  13  *
  14  * This library is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * Lesser General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU Lesser General Public
  20  * License along with this library; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  22  */
  23
  24 #include <stdio.h>
  25 #include <stdlib.h>
  26
  27 #include <windows.h>
  28 #include <commctrl.h>
  29 #include <winnt.h>
  30
  31 #include "taskmgr.h"
  32 #include "perfdata.h"
  33
  34 static void DoSetPriority(DWORD priority)
  35 {
  36     LVITEMW          lvitem;
  37     ULONG            Index, Count;
  38     DWORD            dwProcessId;
  39     HANDLE           hProcess;
  40     WCHAR            wstrErrorText[256];
  41
  42     WCHAR    wszWarnMsg[255];
  43     WCHAR    wszWarnTitle[255];
  44     WCHAR    wszUnable2Change[255];
  45
  46     LoadStringW(hInst, IDS_PRIORITY_CHANGE_MESSAGE, wszWarnMsg, ARRAY_SIZE(wszWarnMsg));
  47     LoadStringW(hInst, IDS_WARNING_TITLE, wszWarnTitle, ARRAY_SIZE(wszWarnTitle));
  48     LoadStringW(hInst, IDS_PRIORITY_UNABLE2CHANGE, wszUnable2Change, ARRAY_SIZE(wszUnable2Change));
  49
  50     Count = SendMessageW(hProcessPageListCtrl, LVM_GETITEMCOUNT, 0, 0);
  51     for (Index=0; Index<Count; Index++)
  52     {
  53         lvitem.mask = LVIF_STATE;
  54         lvitem.stateMask = LVIS_SELECTED;
  55         lvitem.iItem = Index;
  56         lvitem.iSubItem = 0;
  57
  58         SendMessageW(hProcessPageListCtrl, LVM_GETITEMW, 0, (LPARAM)&lvitem);
  59
  60         if (lvitem.state & LVIS_SELECTED)
  61             break;
  62     }
  63
  64     Count = SendMessageW(hProcessPageListCtrl, LVM_GETSELECTEDCOUNT, 0, 0);
  65     dwProcessId = PerfDataGetProcessId(Index);
  66     if ((Count != 1) || (dwProcessId == 0))
  67         return;
  68
  69     if (MessageBoxW(hMainWnd, wszWarnMsg, wszWarnTitle, MB_YESNO|MB_ICONWARNING) != IDYES)
  70         return;
  71
  72     hProcess = OpenProcess(PROCESS_SET_INFORMATION, FALSE, dwProcessId);
  73
  74     if (!hProcess)
  75     {
  76         GetLastErrorText(wstrErrorText, ARRAY_SIZE(wstrErrorText));
  77         MessageBoxW(hMainWnd, wstrErrorText, wszUnable2Change, MB_OK|MB_ICONSTOP);
  78         return;
  79     }
  80
  81     if (!SetPriorityClass(hProcess, priority))
  82     {
  83         GetLastErrorText(wstrErrorText, ARRAY_SIZE(wstrErrorText));
  84         MessageBoxW(hMainWnd, wstrErrorText, wszUnable2Change, MB_OK|MB_ICONSTOP);
  85     }
  86
  87     CloseHandle(hProcess);
  88 }
  89
  90 void ProcessPage_OnSetPriorityRealTime(void)
  91 {
  92     DoSetPriority(REALTIME_PRIORITY_CLASS);
  93 }
  94
  95 void ProcessPage_OnSetPriorityHigh(void)
  96 {
  97     DoSetPriority(HIGH_PRIORITY_CLASS);
  98 }
  99
 100 void ProcessPage_OnSetPriorityAboveNormal(void)
 101 {
 102     DoSetPriority(ABOVE_NORMAL_PRIORITY_CLASS);
 103 }
 104
 105 void ProcessPage_OnSetPriorityNormal(void)
 106 {
 107     DoSetPriority(NORMAL_PRIORITY_CLASS);
 108 }
 109
 110 void ProcessPage_OnSetPriorityBelowNormal(void)
 111 {
 112     DoSetPriority(BELOW_NORMAL_PRIORITY_CLASS);
 113 }
 114
 115 void ProcessPage_OnSetPriorityLow(void)
 116 {
 117     DoSetPriority(IDLE_PRIORITY_CLASS);
 118 }