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 #define WIN32_LEAN_AND_MEAN    /* Exclude rarely-used stuff from Windows headers */
  25 #include <windows.h>
  26 #include <commctrl.h>
  27 #include <stdlib.h>
  28 #include <malloc.h>
  29 #include <memory.h>
  30 #include <stdio.h>
  31 #include <winnt.h>
  32
  33 #include "wine/unicode.h"
  34 #include "taskmgr.h"
  35 #include "perfdata.h"
  36
  37 static void DoSetPriority(DWORD priority)
  38 {
  39     LVITEMW          lvitem;
  40     ULONG            Index;
  41     DWORD            dwProcessId;
  42     HANDLE           hProcess;
  43     WCHAR            wstrErrorText[256];
  44
  45     static const WCHAR    wszWarnMsg[] = {'W','A','R','N','I','N','G',':',' ','C','h','a','n','g','i','n','g',
  46 ' ','t','h','e',' ','p','r','i','o','r','i','t','y',' ','c','l','a','s','s',' ','o','f',' ','t','h','i','s',' ','p','r','o','c','e','s','s',' ','m','a','y','\n','c','a','u','s','e',' ','u','n','d','e','s','i','r','e','d',' ','r','e','s','u','l','t','s',' ','i','n','c','l','u','d','i','n','g',' ','s','y','s','t','e','m',' ','i','n','s','t','a','b','i','l','i','t','y','.',' ','A','r','e',' ','y','o','u','\n','s','u','r','e',' ','y','o','u',' ','w','a','n','t',' ','t','o',' ','c','h','a','n','g','e',' ','t','h','e',' ','p','r','i','o','r','i','t','y',' ','c','l','a','s','s','?',0};
  47     static const WCHAR    wszWarnTitle[] = {'T','a','s','k',' ','M','a','n','a','g','e','r',' ','W','a','r','n','i','n','g',0};
  48     static const WCHAR    wszUnable2Change[] = {'U','n','a','b','l','e',' ','t','o',' ','C','h','a','n','g','e',' ','P','r','i','o','r','i','t','y',0};
  49
  50     for (Index=0; Index<(ULONG)ListView_GetItemCount(hProcessPageListCtrl); Index++)
  51     {
  52         lvitem.mask = LVIF_STATE;
  53         lvitem.stateMask = LVIS_SELECTED;
  54         lvitem.iItem = Index;
  55         lvitem.iSubItem = 0;
  56
  57         SendMessageW(hProcessPageListCtrl, LVM_GETITEMW, 0, (LPARAM)&lvitem);
  58
  59         if (lvitem.state & LVIS_SELECTED)
  60             break;
  61     }
  62
  63     dwProcessId = PerfDataGetProcessId(Index);
  64
  65     if ((ListView_GetSelectedCount(hProcessPageListCtrl) != 1) || (dwProcessId == 0))
  66         return;
  67
  68     if (MessageBoxW(hMainWnd, wszWarnMsg, wszWarnTitle, MB_YESNO|MB_ICONWARNING) != IDYES)
  69         return;
  70
  71     hProcess = OpenProcess(PROCESS_SET_INFORMATION, FALSE, dwProcessId);
  72
  73     if (!hProcess)
  74     {
  75         GetLastErrorText(wstrErrorText, sizeof(wstrErrorText)/sizeof(WCHAR));
  76         MessageBoxW(hMainWnd, wstrErrorText, wszUnable2Change, MB_OK|MB_ICONSTOP);
  77         return;
  78     }
  79
  80     if (!SetPriorityClass(hProcess, priority))
  81     {
  82         GetLastErrorText(wstrErrorText, sizeof(wstrErrorText)/sizeof(WCHAR));
  83         MessageBoxW(hMainWnd, wstrErrorText, wszUnable2Change, MB_OK|MB_ICONSTOP);
  84     }
  85
  86     CloseHandle(hProcess);
  87 }
  88
  89 void ProcessPage_OnSetPriorityRealTime(void)
  90 {
  91     DoSetPriority(REALTIME_PRIORITY_CLASS);
  92 }
  93
  94 void ProcessPage_OnSetPriorityHigh(void)
  95 {
  96     DoSetPriority(HIGH_PRIORITY_CLASS);
  97 }
  98
  99 void ProcessPage_OnSetPriorityAboveNormal(void)
 100 {
 101     DoSetPriority(ABOVE_NORMAL_PRIORITY_CLASS);
 102 }
 103
 104 void ProcessPage_OnSetPriorityNormal(void)
 105 {
 106     DoSetPriority(NORMAL_PRIORITY_CLASS);
 107 }
 108
 109 void ProcessPage_OnSetPriorityBelowNormal(void)
 110 {
 111     DoSetPriority(BELOW_NORMAL_PRIORITY_CLASS);
 112 }
 113
 114 void ProcessPage_OnSetPriorityLow(void)
 115 {
 116     DoSetPriority(IDLE_PRIORITY_CLASS);
 117 }