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diff --git a/vcl/win/dtrans/MtaOleClipb.cxx b/vcl/win/dtrans/MtaOleClipb.cxx
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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed
+ * with this work for additional information regarding copyright
+ * ownership. The ASF licenses this file to you under the Apache
+ * License, Version 2.0 (the "License"); you may not use this file
+ * except in compliance with the License. You may obtain a copy of
+ * the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+/*
+ MtaOleClipb.cxx - documentation
+
+ This class setup a single threaded apartment (sta) thread to deal with
+ the ole clipboard, which runs only in an sta thread.
+ The consequence is that callback from the ole clipboard are in the
+ context of this sta thread. In the soffice applications this may lead
+ to problems because they all use the one and only mutex called
+ SolarMutex.
+ In order to transfer clipboard requests to our sta thread we use a
+ hidden window and forward these requests via window messages.
+*/
+
+#include <osl/diagnose.h>
+#include <sal/log.hxx>
+
+#include "MtaOleClipb.hxx"
+
+#include <svsys.h>
+#include <win/saldata.hxx>
+
+#include <osl/thread.h>
+
+#include <wchar.h>
+#include <process.h>
+
+#include <systools/win32/comtools.hxx>
+#include <systools/win32/retry_if_failed.hxx>
+
+#include <comphelper/windowserrorstring.hxx>
+
+// namespace directives
+
+using osl::MutexGuard;
+using osl::ClearableMutexGuard;
+
+namespace /* private */
+{
+ const wchar_t g_szWndClsName[] = L"MtaOleReqWnd###";
+
+ // messages constants
+
+ const sal_uInt32 MSG_SETCLIPBOARD = WM_USER + 0x0001;
+ const sal_uInt32 MSG_GETCLIPBOARD = WM_USER + 0x0002;
+ const sal_uInt32 MSG_REGCLIPVIEWER = WM_USER + 0x0003;
+ const sal_uInt32 MSG_FLUSHCLIPBOARD = WM_USER + 0x0004;
+ const sal_uInt32 MSG_SHUTDOWN = WM_USER + 0x0005;
+
+ const sal_uInt32 MAX_WAITTIME = 10000; // msec
+ const sal_uInt32 MAX_WAIT_SHUTDOWN = 10000; // msec
+
+ const bool MANUAL_RESET = true;
+ const bool INIT_NONSIGNALED = false;
+
+ /* Cannot use osl conditions because they are blocking
+ without waking up on messages sent by another thread
+ this leads to deadlocks because we are blocking the
+ communication between inter-thread marshalled COM
+ pointers.
+ COM Proxy-Stub communication uses SendMessages for
+ synchronization purposes.
+ */
+ class Win32Condition
+ {
+ public:
+ Win32Condition() = default;
+
+ ~Win32Condition() { CloseHandle(m_hEvent); }
+
+ // wait infinite for own event (or abort event) be signaled
+ // leave messages sent through
+ bool wait(HANDLE hEvtAbort)
+ {
+ const HANDLE hWaitArray[2] = { m_hEvent, hEvtAbort };
+ while (true)
+ {
+ DWORD dwResult
+ = MsgWaitForMultipleObjects(2, hWaitArray, FALSE, INFINITE, QS_SENDMESSAGE);
+
+ switch (dwResult)
+ {
+ case WAIT_OBJECT_0: // wait successful
+ return true;
+
+ case WAIT_OBJECT_0 + 1: // wait aborted
+ return false;
+
+ case WAIT_OBJECT_0 + 2:
+ {
+ /* PeekMessage processes all messages in the SendMessage
+ queue that's what we want, messages from the PostMessage
+ queue stay untouched */
+ MSG msg;
+ PeekMessageW(&msg, nullptr, 0, 0, PM_NOREMOVE);
+
+ break;
+ }
+
+ default: // WAIT_FAILED?
+ return false;
+ }
+ }
+ }
+
+ // set the event
+ void set() { SetEvent(m_hEvent); }
+
+ private:
+ HANDLE m_hEvent = CreateEventW(nullptr, MANUAL_RESET, INIT_NONSIGNALED, nullptr);
+
+ // prevent copy/assignment
+ Win32Condition(const Win32Condition&) = delete;
+ Win32Condition& operator=(const Win32Condition&) = delete;
+ };
+
+ // we use one condition for every request
+
+ struct MsgCtx
+ {
+ Win32Condition aCondition;
+ HRESULT hr;
+ };
+
+} /* namespace private */
+
+// static member initialization
+
+CMtaOleClipboard* CMtaOleClipboard::s_theMtaOleClipboardInst = nullptr;
+
+// marshal an IDataObject
+
+//inline
+static HRESULT MarshalIDataObjectInStream( IDataObject* pIDataObject, LPSTREAM* ppStream )
+{
+ OSL_ASSERT( nullptr != pIDataObject );
+ OSL_ASSERT( nullptr != ppStream );
+
+ *ppStream = nullptr;
+ return CoMarshalInterThreadInterfaceInStream(
+ __uuidof(IDataObject), //The IID of interface to be marshalled
+ pIDataObject, //The interface pointer
+ ppStream //IStream pointer
+ );
+}
+
+// unmarshal an IDataObject
+
+//inline
+static HRESULT UnmarshalIDataObjectAndReleaseStream( LPSTREAM lpStream, IDataObject** ppIDataObject )
+{
+ OSL_ASSERT( nullptr != lpStream );
+ OSL_ASSERT( nullptr != ppIDataObject );
+
+ *ppIDataObject = nullptr;
+ return CoGetInterfaceAndReleaseStream(
+ lpStream,
+ __uuidof(IDataObject),
+ reinterpret_cast<LPVOID*>(ppIDataObject));
+}
+
+// helper class to ensure that the calling thread has com initialized
+
+namespace {
+
+class CAutoComInit
+{
+public:
+ /*
+ to be safe we call CoInitializeEx
+ although it is not necessary if
+ the calling thread was created
+ using osl_CreateThread because
+ this function calls CoInitializeEx
+ for every thread it creates
+ */
+ CAutoComInit( ) : m_hResult( CoInitializeEx( nullptr, COINIT_APARTMENTTHREADED ) )
+ {
+ if ( S_OK == m_hResult )
+ OSL_FAIL(
+ "com was not yet initialized, the thread was not created using osl_createThread" );
+ else if ( FAILED( m_hResult ) && !( RPC_E_CHANGED_MODE == m_hResult ) )
+ OSL_FAIL(
+ "com could not be initialized, maybe the thread was not created using osl_createThread" );
+ }
+
+ ~CAutoComInit( )
+ {
+ /*
+ we only call CoUninitialize when
+ CoInitializeEx returned S_FALSE, what
+ means that com was already initialize
+ for that thread so we keep the balance
+ if CoInitializeEx returned S_OK what means
+ com was not yet initialized we better
+ let com initialized or we may run into
+ the realm of undefined behaviour
+ */
+ if ( m_hResult == S_FALSE )
+ CoUninitialize( );
+ }
+
+private:
+ HRESULT m_hResult;
+};
+
+}
+
+// ctor
+
+CMtaOleClipboard::CMtaOleClipboard( ) :
+ m_hOleThread( nullptr ),
+ m_uOleThreadId( 0 ),
+ // signals that the thread was successfully setup
+ m_hEvtThrdReady(CreateEventW( nullptr, MANUAL_RESET, INIT_NONSIGNALED, nullptr )),
+ m_hwndMtaOleReqWnd( nullptr ),
+ // signals that the window is destroyed - to stop waiting any winproc result
+ m_hEvtWndDisposed(CreateEventW(nullptr, MANUAL_RESET, INIT_NONSIGNALED, nullptr)),
+ m_MtaOleReqWndClassAtom( 0 ),
+ m_pfncClipViewerCallback( nullptr ),
+ m_bRunClipboardNotifierThread( true ),
+ m_hClipboardChangedEvent( m_hClipboardChangedNotifierEvents[0] ),
+ m_hTerminateClipboardChangedNotifierEvent( m_hClipboardChangedNotifierEvents[1] ),
+ m_ClipboardChangedEventCount( 0 )
+{
+ OSL_ASSERT( nullptr != m_hEvtThrdReady );
+ SAL_WARN_IF(!m_hEvtWndDisposed, "vcl.win.dtrans", "CreateEventW failed: m_hEvtWndDisposed is nullptr");
+
+ s_theMtaOleClipboardInst = this;
+
+ m_hOleThread = CreateThread(
+ nullptr, 0, CMtaOleClipboard::oleThreadProc, this, 0, &m_uOleThreadId );
+ OSL_ASSERT( nullptr != m_hOleThread );
+
+ // setup the clipboard changed notifier thread
+
+ m_hClipboardChangedNotifierEvents[0] = CreateEventW( nullptr, MANUAL_RESET, INIT_NONSIGNALED, nullptr );
+ OSL_ASSERT( nullptr != m_hClipboardChangedNotifierEvents[0] );
+
+ m_hClipboardChangedNotifierEvents[1] = CreateEventW( nullptr, MANUAL_RESET, INIT_NONSIGNALED, nullptr );
+ OSL_ASSERT( nullptr != m_hClipboardChangedNotifierEvents[1] );
+
+ DWORD uThreadId;
+ m_hClipboardChangedNotifierThread = CreateThread(
+ nullptr, 0, CMtaOleClipboard::clipboardChangedNotifierThreadProc, this, 0, &uThreadId );
+
+ OSL_ASSERT( nullptr != m_hClipboardChangedNotifierThread );
+}
+
+// dtor
+
+CMtaOleClipboard::~CMtaOleClipboard( )
+{
+ // block calling threads out
+ if ( nullptr != m_hEvtThrdReady )
+ ResetEvent( m_hEvtThrdReady );
+
+ // terminate the clipboard changed notifier thread
+ m_bRunClipboardNotifierThread = false;
+ SetEvent( m_hTerminateClipboardChangedNotifierEvent );
+
+ // unblock whoever could still wait for event processing
+ if (m_hEvtWndDisposed)
+ SetEvent(m_hEvtWndDisposed);
+
+ sal_uInt32 dwResult = WaitForSingleObject(
+ m_hClipboardChangedNotifierThread, MAX_WAIT_SHUTDOWN );
+
+ OSL_ENSURE( dwResult == WAIT_OBJECT_0, "clipboard notifier thread could not terminate" );
+
+ if ( nullptr != m_hClipboardChangedNotifierThread )
+ CloseHandle( m_hClipboardChangedNotifierThread );
+
+ if ( nullptr != m_hClipboardChangedNotifierEvents[0] )
+ CloseHandle( m_hClipboardChangedNotifierEvents[0] );
+
+ if ( nullptr != m_hClipboardChangedNotifierEvents[1] )
+ CloseHandle( m_hClipboardChangedNotifierEvents[1] );
+
+ // end the thread
+ // because DestroyWindow can only be called
+ // from within the thread that created the window
+ sendMessage( MSG_SHUTDOWN );
+
+ // wait for thread shutdown
+ dwResult = WaitForSingleObject( m_hOleThread, MAX_WAIT_SHUTDOWN );
+ OSL_ENSURE( dwResult == WAIT_OBJECT_0, "OleThread could not terminate" );
+
+ if ( nullptr != m_hOleThread )
+ CloseHandle( m_hOleThread );
+
+ if ( nullptr != m_hEvtThrdReady )
+ CloseHandle( m_hEvtThrdReady );
+
+ if (m_hEvtWndDisposed)
+ CloseHandle(m_hEvtWndDisposed);
+
+ if ( m_MtaOleReqWndClassAtom )
+ UnregisterClassW( g_szWndClsName, nullptr );
+
+ OSL_ENSURE( ( nullptr == m_pfncClipViewerCallback ),
+ "Clipboard viewer not properly unregistered" );
+}
+
+HRESULT CMtaOleClipboard::flushClipboard( )
+{
+ if ( !WaitForThreadReady( ) )
+ {
+ OSL_FAIL( "clipboard sta thread not ready" );
+ return E_FAIL;
+ }
+
+ OSL_ENSURE( GetCurrentThreadId( ) != m_uOleThreadId,
+ "flushClipboard from within clipboard sta thread called" );
+
+ MsgCtx aMsgCtx;
+
+ const bool bWaitSuccess = postMessage(MSG_FLUSHCLIPBOARD, 0, reinterpret_cast<LPARAM>(&aMsgCtx))
+ && aMsgCtx.aCondition.wait(m_hEvtWndDisposed);
+
+ return bWaitSuccess ? aMsgCtx.hr : E_ABORT;
+}
+
+HRESULT CMtaOleClipboard::getClipboard( IDataObject** ppIDataObject )
+{
+ OSL_PRECOND( nullptr != ppIDataObject, "invalid parameter" );
+ OSL_PRECOND( GetCurrentThreadId( ) != m_uOleThreadId, "getClipboard from within clipboard sta thread called" );
+
+ if ( !WaitForThreadReady( ) )
+ {
+ OSL_FAIL( "clipboard sta thread not ready" );
+ return E_FAIL;
+ }
+
+ CAutoComInit comAutoInit;
+
+ LPSTREAM lpStream;
+
+ *ppIDataObject = nullptr;
+
+ MsgCtx aMsgCtx;
+
+ const bool bWaitSuccess = postMessage(MSG_GETCLIPBOARD, reinterpret_cast<WPARAM>(&lpStream),
+ reinterpret_cast<LPARAM>(&aMsgCtx))
+ && aMsgCtx.aCondition.wait(m_hEvtWndDisposed);
+
+ HRESULT hr = bWaitSuccess ? aMsgCtx.hr : E_ABORT;
+
+ if ( SUCCEEDED( hr ) )
+ {
+ hr = UnmarshalIDataObjectAndReleaseStream( lpStream, ppIDataObject );
+ OSL_ENSURE( SUCCEEDED( hr ), "unmarshalling clipboard data object failed" );
+ }
+
+ return hr;
+}
+
+// this is an asynchronous method that's why we don't wait until the
+// request is completed
+
+HRESULT CMtaOleClipboard::setClipboard( IDataObject* pIDataObject )
+{
+ if ( !WaitForThreadReady( ) )
+ {
+ OSL_FAIL( "clipboard sta thread not ready" );
+ return E_FAIL;
+ }
+
+ CAutoComInit comAutoInit;
+
+ OSL_ENSURE( GetCurrentThreadId( ) != m_uOleThreadId, "setClipboard from within the clipboard sta thread called" );
+
+ // because we marshall this request
+ // into the sta thread we better
+ // acquire the interface here so
+ // that the object will not be
+ // destroyed before the ole clipboard
+ // can acquire it
+ // remember: pIDataObject may be NULL
+ // which is a request to clear the
+ // current clipboard content
+ if ( pIDataObject )
+ pIDataObject->AddRef( );
+
+ postMessage(
+ MSG_SETCLIPBOARD,
+ reinterpret_cast< WPARAM >( pIDataObject ) );
+
+ // because this is an asynchronous function
+ // the return value is useless
+ return S_OK;
+}
+
+// register a clipboard viewer
+
+bool CMtaOleClipboard::registerClipViewer( LPFNC_CLIPVIEWER_CALLBACK_t pfncClipViewerCallback )
+{
+ if ( !WaitForThreadReady( ) )
+ {
+ OSL_FAIL( "clipboard sta thread not ready" );
+ return false;
+ }
+
+ OSL_ENSURE( GetCurrentThreadId( ) != m_uOleThreadId, "registerClipViewer from within the OleThread called" );
+
+ MsgCtx aMsgCtx;
+
+ if (postMessage(MSG_REGCLIPVIEWER, reinterpret_cast<WPARAM>(pfncClipViewerCallback),
+ reinterpret_cast<LPARAM>(&aMsgCtx)))
+ aMsgCtx.aCondition.wait(m_hEvtWndDisposed);
+
+ return false;
+}
+
+// register a clipboard viewer
+
+bool CMtaOleClipboard::onRegisterClipViewer( LPFNC_CLIPVIEWER_CALLBACK_t pfncClipViewerCallback )
+{
+ bool bRet = false;
+
+ // we need exclusive access because the clipboard changed notifier
+ // thread also accesses this variable
+ MutexGuard aGuard( m_pfncClipViewerCallbackMutex );
+
+ // register if not yet done
+ if ( ( nullptr != pfncClipViewerCallback ) && ( nullptr == m_pfncClipViewerCallback ) )
+ {
+ // SetClipboardViewer sends a WM_DRAWCLIPBOARD message we ignore
+ // this message if we register ourself as clip viewer
+ m_bInRegisterClipViewer = true;
+ bRet = AddClipboardFormatListener(m_hwndMtaOleReqWnd);
+ m_bInRegisterClipViewer = false;
+
+ // save the new callback function
+ m_pfncClipViewerCallback = pfncClipViewerCallback;
+ }
+ else if ( ( nullptr == pfncClipViewerCallback ) && ( nullptr != m_pfncClipViewerCallback ) )
+ {
+ m_pfncClipViewerCallback = nullptr;
+
+ // unregister if input parameter is NULL and we previously registered
+ // as clipboard viewer
+ bRet = RemoveClipboardFormatListener(m_hwndMtaOleReqWnd);
+ }
+
+ return bRet;
+}
+
+HRESULT CMtaOleClipboard::onSetClipboard( IDataObject* pIDataObject )
+{
+ return sal::systools::RetryIfFailed(10, 100,
+ [pIDataObject] { return OleSetClipboard(pIDataObject); });
+}
+
+HRESULT CMtaOleClipboard::onGetClipboard( LPSTREAM* ppStream )
+{
+ OSL_ASSERT(nullptr != ppStream);
+
+ IDataObjectPtr pIDataObject;
+
+ // forward the request to the OleClipboard
+ HRESULT hr
+ = sal::systools::RetryIfFailed(10, 100, [p = &pIDataObject] { return OleGetClipboard(p); });
+ if ( SUCCEEDED( hr ) )
+ {
+ hr = MarshalIDataObjectInStream(pIDataObject.get(), ppStream);
+ OSL_ENSURE(SUCCEEDED(hr), "marshalling clipboard data object failed");
+ }
+ return hr;
+}
+
+// flush the ole-clipboard
+
+HRESULT CMtaOleClipboard::onFlushClipboard( )
+{
+ return sal::systools::RetryIfFailed(10, 100, [] { return OleFlushClipboard(); });
+}
+
+// handle clipboard update event
+
+LRESULT CMtaOleClipboard::onClipboardUpdate()
+{
+ // we don't send a notification if we are
+ // registering ourself as clipboard
+ if ( !m_bInRegisterClipViewer )
+ {
+ MutexGuard aGuard( m_ClipboardChangedEventCountMutex );
+
+ m_ClipboardChangedEventCount++;
+ SetEvent( m_hClipboardChangedEvent );
+ }
+
+ return 0;
+}
+
+// SendMessage so we don't need to supply the HWND if we send
+// something to our wrapped window
+
+LRESULT CMtaOleClipboard::sendMessage( UINT msg, WPARAM wParam, LPARAM lParam )
+{
+ return ::SendMessageW( m_hwndMtaOleReqWnd, msg, wParam, lParam );
+}
+
+// PostMessage so we don't need to supply the HWND if we send
+// something to our wrapped window
+
+bool CMtaOleClipboard::postMessage( UINT msg, WPARAM wParam, LPARAM lParam )
+{
+ bool const ret = PostMessageW(m_hwndMtaOleReqWnd, msg, wParam, lParam);
+ SAL_WARN_IF(!ret, "vcl.win.dtrans", "ERROR: PostMessage() failed!");
+ return ret;
+}
+
+// the window proc
+
+LRESULT CALLBACK CMtaOleClipboard::mtaOleReqWndProc( HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam )
+{
+ LRESULT lResult = 0;
+
+ // get a connection to the class-instance via the static member
+ CMtaOleClipboard* pImpl = CMtaOleClipboard::s_theMtaOleClipboardInst;
+ OSL_ASSERT( nullptr != pImpl );
+
+ switch( uMsg )
+ {
+ case MSG_SETCLIPBOARD:
+ {
+ IDataObject* pIDataObject = reinterpret_cast< IDataObject* >( wParam );
+ CMtaOleClipboard::onSetClipboard( pIDataObject );
+
+ // in setClipboard we did acquire the
+ // interface pointer in order to prevent
+ // destruction of the object before the
+ // ole clipboard can acquire the interface
+ // now we release the interface so that
+ // our lostOwnership mechanism works
+ // remember: pIDataObject may be NULL
+ if ( pIDataObject )
+ pIDataObject->Release( );
+ }
+ break;
+
+ case MSG_GETCLIPBOARD:
+ {
+ MsgCtx* aMsgCtx = reinterpret_cast< MsgCtx* >( lParam );
+ OSL_ASSERT( aMsgCtx );
+
+ aMsgCtx->hr = CMtaOleClipboard::onGetClipboard( reinterpret_cast< LPSTREAM* >(wParam) );
+ aMsgCtx->aCondition.set( );
+ }
+ break;
+
+ case MSG_FLUSHCLIPBOARD:
+ {
+ MsgCtx* aMsgCtx = reinterpret_cast< MsgCtx* >( lParam );
+ OSL_ASSERT( aMsgCtx );
+
+ aMsgCtx->hr = CMtaOleClipboard::onFlushClipboard( );
+ aMsgCtx->aCondition.set( );
+ }
+ break;
+
+ case MSG_REGCLIPVIEWER:
+ {
+ MsgCtx* pMsgCtx = reinterpret_cast<MsgCtx*>(lParam);
+ SAL_WARN_IF(!pMsgCtx, "vcl.win.dtrans", "pMsgCtx is nullptr");
+
+ pImpl->onRegisterClipViewer(
+ reinterpret_cast<CMtaOleClipboard::LPFNC_CLIPVIEWER_CALLBACK_t>(wParam));
+ pMsgCtx->aCondition.set();
+ }
+ break;
+
+ case WM_CLIPBOARDUPDATE:
+ lResult = pImpl->onClipboardUpdate();
+ break;
+
+ case MSG_SHUTDOWN:
+ DestroyWindow( pImpl->m_hwndMtaOleReqWnd );
+ break;
+
+ // force the sta thread to end
+ case WM_DESTROY:
+ SetEvent(pImpl->m_hEvtWndDisposed); // stop waiting for conditions set by this wndproc
+ PostQuitMessage( 0 );
+ break;
+
+ default:
+ lResult = DefWindowProcW( hWnd, uMsg, wParam, lParam );
+ break;
+ }
+
+ return lResult;
+}
+
+void CMtaOleClipboard::createMtaOleReqWnd( )
+{
+ WNDCLASSEXW wcex;
+
+ SalData* pSalData = GetSalData();
+ OSL_ASSERT(nullptr != pSalData->mhInst);
+
+ ZeroMemory( &wcex, sizeof(wcex) );
+
+ wcex.cbSize = sizeof(wcex);
+ wcex.style = 0;
+ wcex.lpfnWndProc = CMtaOleClipboard::mtaOleReqWndProc;
+ wcex.cbClsExtra = 0;
+ wcex.cbWndExtra = 0;
+ wcex.hInstance = pSalData->mhInst;
+ wcex.hIcon = nullptr;
+ wcex.hCursor = nullptr;
+ wcex.hbrBackground = nullptr;
+ wcex.lpszMenuName = nullptr;
+ wcex.lpszClassName = g_szWndClsName;
+ wcex.hIconSm = nullptr;
+
+ m_MtaOleReqWndClassAtom = RegisterClassExW( &wcex );
+
+ if ( 0 != m_MtaOleReqWndClassAtom )
+ m_hwndMtaOleReqWnd = CreateWindowW(
+ g_szWndClsName, nullptr, 0, 0, 0, 0, 0, nullptr, nullptr, pSalData->mhInst, nullptr );
+}
+
+unsigned int CMtaOleClipboard::run( )
+{
+ HRESULT hr = OleInitialize( nullptr );
+ OSL_ASSERT( SUCCEEDED( hr ) );
+
+ createMtaOleReqWnd( );
+
+ unsigned int nRet = ~0U; // = error
+
+ if ( IsWindow( m_hwndMtaOleReqWnd ) )
+ {
+ if ( nullptr != m_hEvtThrdReady )
+ SetEvent( m_hEvtThrdReady );
+
+ nRet = 0;
+
+ // pumping messages
+ for (;;)
+ {
+ MSG msg;
+ int const bRet = GetMessageW(&msg, nullptr, 0, 0);
+ if (bRet == 0)
+ {
+ break;
+ }
+ if (-1 == bRet)
+ {
+ SAL_WARN("vcl.win.dtrans", "GetMessageW failed: " << WindowsErrorString(GetLastError()));
+ nRet = ~0U;
+ break;
+ }
+ DispatchMessageW(&msg);
+ }
+ }
+
+ OleUninitialize( );
+
+ return nRet;
+}
+
+DWORD WINAPI CMtaOleClipboard::oleThreadProc( _In_ LPVOID pParam )
+{
+ osl_setThreadName("CMtaOleClipboard::run()");
+
+ CMtaOleClipboard* pInst =
+ static_cast<CMtaOleClipboard*>( pParam );
+ OSL_ASSERT( nullptr != pInst );
+
+ return pInst->run( );
+}
+
+DWORD WINAPI CMtaOleClipboard::clipboardChangedNotifierThreadProc( _In_ LPVOID pParam )
+{
+ osl_setThreadName("CMtaOleClipboard::clipboardChangedNotifierThreadProc()");
+ CMtaOleClipboard* pInst = static_cast< CMtaOleClipboard* >( pParam );
+ OSL_ASSERT( nullptr != pInst );
+
+ sal::systools::CoInitializeGuard aGuard(COINIT_APARTMENTTHREADED, false,
+ sal::systools::CoInitializeGuard::WhenFailed::NoThrow);
+
+ // assuming we don't need a lock for
+ // a boolean variable like m_bRun...
+ while ( pInst->m_bRunClipboardNotifierThread )
+ {
+ // process window messages because of CoInitializeEx
+ MSG Msg;
+ while (PeekMessageW(&Msg, nullptr, 0, 0, PM_REMOVE))
+ DispatchMessageW(&Msg);
+
+ // wait for clipboard changed or terminate event
+ MsgWaitForMultipleObjects(2, pInst->m_hClipboardChangedNotifierEvents, false, INFINITE,
+ QS_ALLINPUT | QS_ALLPOSTMESSAGE);
+
+ ClearableMutexGuard aGuard2( pInst->m_ClipboardChangedEventCountMutex );
+
+ if ( pInst->m_ClipboardChangedEventCount > 0 )
+ {
+ pInst->m_ClipboardChangedEventCount--;
+ if ( 0 == pInst->m_ClipboardChangedEventCount )
+ ResetEvent( pInst->m_hClipboardChangedEvent );
+
+ aGuard2.clear( );
+
+ // nobody should touch m_pfncClipViewerCallback while we do
+ MutexGuard aClipViewerGuard( pInst->m_pfncClipViewerCallbackMutex );
+
+ // notify all clipboard listener
+ if ( pInst->m_pfncClipViewerCallback )
+ pInst->m_pfncClipViewerCallback( );
+ }
+ else
+ aGuard2.clear( );
+ }
+
+ return 0;
+}
+
+bool CMtaOleClipboard::WaitForThreadReady( ) const
+{
+ bool bRet = false;
+
+ if ( nullptr != m_hEvtThrdReady )
+ {
+ DWORD dwResult = WaitForSingleObject(
+ m_hEvtThrdReady, MAX_WAITTIME );
+ bRet = ( dwResult == WAIT_OBJECT_0 );
+ }
+
+ return bRet;
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */