[WIP] Enumerate windows processes with wtsapi32

src/main/java/ooo/oshi/foreign/windows/WtsApi32.java

@@ -0,0 +1,63 @@
+package ooo.oshi.foreign.windows;
+
+import java.lang.foreign.*;
+import java.lang.invoke.MethodHandle;
+
+import static java.lang.foreign.ValueLayout.*;
+
+public class WtsApi32 {
+
+    private static final SymbolLookup WTSAPI32;
+    private static final Linker LINKER;
+
+    static {
+        LINKER = Linker.nativeLinker();
+        System.loadLibrary("wtsapi32");
+        WTSAPI32 = SymbolLookup.loaderLookup();
+    }
+
+    private static MethodHandle methodHandle(String methodName, FunctionDescriptor fd) {
+        return LINKER.downcallHandle(WTSAPI32.lookup(methodName).orElseThrow(), fd);
+    }
+
+    private static final MethodHandle WTSEnumerateProcessEx = methodHandle("WTSEnumerateProcessesA", FunctionDescriptor.of(JAVA_BOOLEAN, JAVA_INT, JAVA_INT, JAVA_INT, ADDRESS, ADDRESS));
+
+    private static final MemoryLayout _WTS_PROCESS_INFOA = MemoryLayout.structLayout(
+        JAVA_INT.withName("SessionId"),
+        JAVA_INT.withName("ProcessId"),
+        JAVA_CHAR.withName("pProcessName"),
+        ADDRESS.withName("pUserSid")
+    ).withName("WTS_PROCESS_INFOA");
+
+    /**
+     * Refer to <a href="https://github.com/VFPX/Win32API/blob/master/libraries/wtsapi32/WTSEnumerateProcesses.md">Win32API</a>
+     */
+    public static void enumerateProcesses() {
+        try {
+            try (MemorySession session = MemorySession.openConfined()) {
+                int hServer = 0; // represents null handle
+                int version = 1; // version of enumerated request, must be 1
+                // out variables
+                Addressable ppProcessInfo = session.allocate(_WTS_PROCESS_INFOA); // array of WTS_PROCESS_INFO
+                Addressable pCount = session.allocate(JAVA_INT); // process count
+                var ret = (boolean) WTSEnumerateProcessEx.invokeExact(hServer, 0, version, ppProcessInfo, pCount);
+
+                if (!ret) throw new Exception("error calling WTSEnumerateProcessesA");
+
+                int processCount = ppProcessInfo.address().get(JAVA_INT, 0) - 1;
+                System.out.println("Total processes found: " + processCount);
+
+//                for (int i = 0; i < processCount; i++) {
+//
+//                }
+
+                System.out.println(pCount.address().get(JAVA_INT, 0));
+            }
+        } catch (Throwable ex) {
+            ex.printStackTrace();
+        }
+
+    }
+
+
+}

src/test/java/ooo/oshi/Kernel32Test.java

@@ -1,24 +1,28 @@
 package ooo.oshi;
 
 import ooo.oshi.foreign.windows.Kernel32Library;
+import ooo.oshi.foreign.windows.WtsApi32;
 import ooo.oshi.software.os.OperatingSystem;
 
 public class Kernel32Test {
 	public static void main(String[] args) {
-
-		System.out.println("The operating system is: " + SystemInfo.getCurrentPlatform().getName());
-        SystemInfo si = new SystemInfo();
-        OperatingSystem os = si.getOperatingSystem();
-        int currentProcessId = os.getProcessId();
-        System.out.println("The current Process ID is: " + currentProcessId);
-
-		String computerName = Kernel32Library.getComputerName();
-		System.out.println("Computer Name: " + computerName);
-
-		String tempPath = Kernel32Library.getTempPath();
-		System.out.println("Temp Path: " + tempPath);
-
-		String processName = Kernel32Library.queryFullProcessImageName(currentProcessId, 0);
-		System.out.println("Current Process: " + processName);
+
+
+        WtsApi32.enumerateProcesses();
+
+//		System.out.println("The operating system is: " + SystemInfo.getCurrentPlatform().getName());
+//        SystemInfo si = new SystemInfo();
+//        OperatingSystem os = si.getOperatingSystem();
+//        int currentProcessId = os.getProcessId();
+//        System.out.println("The current Process ID is: " + currentProcessId);
+//
+//		String computerName = Kernel32Library.getComputerName();
+//		System.out.println("Computer Name: " + computerName);
+//
+//		String tempPath = Kernel32Library.getTempPath();
+//		System.out.println("Temp Path: " + tempPath);
+//
+//		String processName = Kernel32Library.queryFullProcessImageName(currentProcessId, 0);
+//		System.out.println("Current Process: " + processName);
 	}
 }