Changeset 3102 in vbox

Timestamp:

Jun 13, 2007 4:15:06 PM (18 years ago)

Author:

vboxsync

Message:

Store VM-Console window’s HWND handler feature implemented (secunet request):

This feature is used to store HWND handler of the VM’s main-window into the Named Virtual Shared Memory segment with VBoxQt-{machine-id} name allowing other application get accessing the main VM console window.

Every time VM window is started, the required information (HWND) is stored into the NVSM segment in the form of VBoxQtInfo structure:
struct VBoxQtInfo
{

uint32_t version; /* Version of the structure, currently 1 */
HWND hwndWin; /* HWND Descriptor */

};
Other application can get access to this segment by segment’s name to use the stored information.
The NVSM segment will be erased by the OS only in case of all of the opened handlers to it are closed.

Location:

trunk/src/VBox/Frontends/VirtualBox

Files:

• include/VBoxConsoleWnd.h (modified) (1 diff)
• src/VBoxConsoleWnd.cpp (modified) (3 diffs)

trunk/src/VBox/Frontends/VirtualBox/include/VBoxConsoleWnd.h

@@ -111 +111 @@
     void updateAppearanceOf (int element);
 
+#ifdef Q_WS_WIN
+    void storeHwndDescriptor();
+    void cleanHwndDescriptor();
+    HANDLE mMapFile;
+    LPCTSTR mBuf;
+#endif
+
 private slots:
 

trunk/src/VBox/Frontends/VirtualBox/src/VBoxConsoleWnd.cpp

@@ -699 +699 @@
     csession = session;
 
+#ifdef Q_WS_WIN
+    /* Store HWND descriptor into named virtual shared memory segment. */
+    storeHwndDescriptor();
+#endif
+
     if (!centralWidget())
     {
@@ -996 +1001 @@
         return;
     }
+
+#ifdef Q_WS_WIN
+    /* Closes the handlers to the stored NVSM segment to let the system free it. */
+    cleanHwndDescriptor();
+#endif
 
     idle_timer->stop();
@@ -1727 +1737 @@
 }
 
+#ifdef Q_WS_WIN
+/* This function stores the current VM console window HWND handler to the
+ * named virtual shared memory segment with VBoxQt-{machine-uuid} name
+ * allowing other application get accessing this VM console window. */
+void VBoxConsoleWnd::storeHwndDescriptor()
+{
+    QString machineId = csession.GetMachine().GetId().toString();
+    QString segmentName = QString ("VBoxQt-%1").arg (machineId);
+
+    /* Structure for storing HWND information */
+    struct VBoxQtInfo
+    {
+        VBoxQtInfo (uint32_t aVersion, HWND aHwnd)
+            : version (aVersion), hwndWin (aHwnd) {}
+        uint32_t version; /* Version of the structure, currently 1 */
+        HWND     hwndWin; /* HWND Descriptor */
+    } info (1, winId());
+
+    /* Open NVSM handle */
+    mMapFile = CreateFileMapping (INVALID_HANDLE_VALUE,   // use paging file
+                                  NULL,                   // default security
+                                  PAGE_READWRITE,         // read/write access
+                                  0,                      // max. object size
+                                  sizeof (info),          // buffer size
+                         (LPCWSTR)segmentName.unicode()); // name of mapping object
+    if (mMapFile == NULL) return;
+
+    mBuf = (LPTSTR) MapViewOfFile (mMapFile,              // handle to map object
+                                   FILE_MAP_ALL_ACCESS,   // read/write permission
+                                   0,
+                                   0,
+                                   sizeof (info));
+    if (mBuf == NULL) return;
+
+    CopyMemory ((PVOID)mBuf, (void*)&info, sizeof (info));
+}
+
+/* This function closes any handlers pointed to allocated named virtual
+ * shared memory segment with this dialog's HWND handler. */
+void VBoxConsoleWnd::cleanHwndDescriptor()
+{
+    /* Freeing resources */
+    if (mBuf != NULL)
+        UnmapViewOfFile (mBuf);
+    if (mMapFile != NULL)
+        CloseHandle (mMapFile);
+}
+#endif
+
+
 //
 // Private slots