Sweden-Number/programs/taskmgr/priority.c

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/*
* ReactOS Task Manager
*
* priority.c
*
* Copyright (C) 1999 - 2001 Brian Palmer <brianp@reactos.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#define WIN32_LEAN_AND_MEAN /* Exclude rarely-used stuff from Windows headers */
#include <windows.h>
#include <commctrl.h>
#include <stdlib.h>
#include <malloc.h>
#include <memory.h>
#include <tchar.h>
#include <stdio.h>
#include <winnt.h>
#include "taskmgr.h"
#include "perfdata.h"
static void DoSetPriority(DWORD priority)
{
LVITEM lvitem;
ULONG Index;
DWORD dwProcessId;
HANDLE hProcess;
TCHAR strErrorText[260];
for (Index=0; Index<(ULONG)ListView_GetItemCount(hProcessPageListCtrl); Index++)
{
lvitem.mask = LVIF_STATE;
lvitem.stateMask = LVIS_SELECTED;
lvitem.iItem = Index;
lvitem.iSubItem = 0;
SendMessage(hProcessPageListCtrl, LVM_GETITEM, 0, (LPARAM)&lvitem);
if (lvitem.state & LVIS_SELECTED)
break;
}
dwProcessId = PerfDataGetProcessId(Index);
if ((ListView_GetSelectedCount(hProcessPageListCtrl) != 1) || (dwProcessId == 0))
return;
if (MessageBox(hMainWnd, _T("WARNING: Changing the priority class of this process may\ncause undesired results including system instability. Are you\nsure you want to change the priority class?"), _T("Task Manager Warning"), MB_YESNO|MB_ICONWARNING) != IDYES)
return;
hProcess = OpenProcess(PROCESS_SET_INFORMATION, FALSE, dwProcessId);
if (!hProcess)
{
GetLastErrorText(strErrorText, 260);
MessageBox(hMainWnd, strErrorText, _T("Unable to Change Priority"), MB_OK|MB_ICONSTOP);
return;
}
if (!SetPriorityClass(hProcess, priority))
{
GetLastErrorText(strErrorText, 260);
MessageBox(hMainWnd, strErrorText, _T("Unable to Change Priority"), MB_OK|MB_ICONSTOP);
}
CloseHandle(hProcess);
}
void ProcessPage_OnSetPriorityRealTime(void)
{
DoSetPriority(REALTIME_PRIORITY_CLASS);
}
void ProcessPage_OnSetPriorityHigh(void)
{
DoSetPriority(HIGH_PRIORITY_CLASS);
}
void ProcessPage_OnSetPriorityAboveNormal(void)
{
DoSetPriority(ABOVE_NORMAL_PRIORITY_CLASS);
}
void ProcessPage_OnSetPriorityNormal(void)
{
DoSetPriority(NORMAL_PRIORITY_CLASS);
}
void ProcessPage_OnSetPriorityBelowNormal(void)
{
DoSetPriority(BELOW_NORMAL_PRIORITY_CLASS);
}
void ProcessPage_OnSetPriorityLow(void)
{
DoSetPriority(IDLE_PRIORITY_CLASS);
}