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PsapiUtil.java
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PsapiUtil.java
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/* Copyright (c) 2020 Torbjörn Svensson, All Rights Reserved
*
* The contents of this file is dual-licensed under 2
* alternative Open Source/Free licenses: LGPL 2.1 or later and
* Apache License 2.0. (starting with JNA version 4.0.0).
*
* You can freely decide which license you want to apply to
* the project.
*
* You may obtain a copy of the LGPL License at:
*
* http://www.gnu.org/licenses/licenses.html
*
* A copy is also included in the downloadable source code package
* containing JNA, in file "LGPL2.1".
*
* You may obtain a copy of the Apache License at:
*
* http://www.apache.org/licenses/
*
* A copy is also included in the downloadable source code package
* containing JNA, in file "AL2.0".
*/
package com.sun.jna.platform.win32;
import com.sun.jna.Native;
import com.sun.jna.platform.win32.WinDef.DWORD;
import com.sun.jna.ptr.IntByReference;
/**
* Psapi utility API.
*
* @author Torbjörn Svensson, azoff[at]svenskalinuxforeninen.se
*/
public abstract class PsapiUtil {
/**
* Retrieves the process identifier for each process object in the system.
*
* @return Array of pids
*/
public static int[] enumProcesses() {
int size = 0;
int[] lpidProcess = null;
IntByReference lpcbNeeded = new IntByReference();
do {
size = size + 1024;
lpidProcess = new int[size];
if (!Psapi.INSTANCE.EnumProcesses(lpidProcess, size * DWORD.SIZE, lpcbNeeded)) {
throw new Win32Exception(Native.getLastError());
}
} while (size == lpcbNeeded.getValue() / DWORD.SIZE);
int[] result = new int[lpcbNeeded.getValue() / DWORD.SIZE];
System.arraycopy(lpidProcess, 0, result, 0, result.length);
return result;
}
}