vcl/win/dtrans/MtaOleClipb.cxx | 137 ++++------------------------------------
vcl/win/dtrans/MtaOleClipb.hxx | 26 -------
vcl/win/dtrans/WinClipboard.cxx | 24 ++++---
vcl/win/dtrans/WinClipboard.hxx | 5 +
4 files changed, 36 insertions(+), 156 deletions(-)
New commits:
commit 9617bc9544cd569066ff187c3672a87fe28fe17f
Author: Jan-Marek Glogowski <glo...@fbihome.de>
AuthorDate: Tue Sep 22 10:40:23 2020 +0200
Commit: Jan-Marek Glogowski <glo...@fbihome.de>
CommitDate: Sun Dec 13 12:18:47 2020 +0100
WIN replace clipboard update thread with Idle
Little "fallout" patch when moving code from /dtrans/** to
/vcl/win/dtrans and merging CWinClipbImpl into CWinClipboard
while I tried to reproduce tdf#62196...
And since we now process the notification in the main thread, we
can get rid of m_pfncClipViewerCallbackMutex, which brings us down
from 6 (!) to 4 mutexes (if Mike counted correct) in the Windows
clipboard code... ok, technically the scheduler / Idle adds its
mutex to this count, but that is not related to the clipboard
handling on Windows ;-)
This also moves the UnregisterClassW into the OLE thread, which
already calls RegisterClassW, to be more consistent.
This now also gets merged, because it seem to fix a deadlocks when
running CppunitTest_sc_macros_test in a loop, which is unclear
where it comes from and I can't reproduce. Tinderboxes and Gerrit
also still seem fine.
Change-Id: Iacbda0bdf6c98f27f6e59964d541524cb45ade24
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/107168
Tested-by: Jenkins
Reviewed-by: Jan-Marek Glogowski <glo...@fbihome.de>
diff --git a/vcl/win/dtrans/MtaOleClipb.cxx b/vcl/win/dtrans/MtaOleClipb.cxx
index d894ae7b5a48..7b8b2b637385 100644
--- a/vcl/win/dtrans/MtaOleClipb.cxx
+++ b/vcl/win/dtrans/MtaOleClipb.cxx
@@ -45,12 +45,7 @@
#include <systools/win32/comtools.hxx>
-// namespace directives
-
-using osl::MutexGuard;
-using osl::ClearableMutexGuard;
-
-namespace /* private */
+namespace
{
const wchar_t g_szWndClsName[] = L"MtaOleReqWnd###";
@@ -231,12 +226,7 @@ CMtaOleClipboard::CMtaOleClipboard( ) :
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 )
+ m_pfncClipViewerCallback(nullptr)
{
OSL_ASSERT( nullptr != m_hEvtThrdReady );
SAL_WARN_IF(!m_hEvtWndDisposed, "dtrans", "CreateEventW failed:
m_hEvtWndDisposed is nullptr");
@@ -246,20 +236,6 @@ CMtaOleClipboard::CMtaOleClipboard( ) :
m_hOleThread = reinterpret_cast<HANDLE>(_beginthreadex(
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] );
-
- unsigned uThreadId;
- m_hClipboardChangedNotifierThread =
reinterpret_cast<HANDLE>(_beginthreadex(
- nullptr, 0, CMtaOleClipboard::clipboardChangedNotifierThreadProc,
this, 0, &uThreadId ));
-
- OSL_ASSERT( nullptr != m_hClipboardChangedNotifierThread );
}
// dtor
@@ -270,35 +246,13 @@ CMtaOleClipboard::~CMtaOleClipboard( )
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 );
+ DWORD dwResult = WaitForSingleObject(m_hOleThread, MAX_WAIT_SHUTDOWN);
OSL_ENSURE( dwResult == WAIT_OBJECT_0, "OleThread could not terminate" );
if ( nullptr != m_hOleThread )
@@ -310,9 +264,6 @@ CMtaOleClipboard::~CMtaOleClipboard( )
if (m_hEvtWndDisposed)
CloseHandle(m_hEvtWndDisposed);
- if ( m_MtaOleReqWndClassAtom )
- UnregisterClassW( g_szWndClsName, nullptr );
-
OSL_ENSURE( ( nullptr == m_pfncClipViewerCallback ),
"Clipboard viewer not properly unregistered" );
}
@@ -348,7 +299,6 @@ HRESULT CMtaOleClipboard::getClipboard( IDataObject**
ppIDataObject )
}
CAutoComInit comAutoInit;
-
LPSTREAM lpStream;
*ppIDataObject = nullptr;
@@ -433,10 +383,6 @@ bool CMtaOleClipboard::onRegisterClipViewer(
LPFNC_CLIPVIEWER_CALLBACK_t pfncCli
{
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 ) )
{
@@ -495,14 +441,8 @@ 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 );
- }
-
+ if (!m_bInRegisterClipViewer && m_pfncClipViewerCallback)
+ m_pfncClipViewerCallback();
return 0;
}
@@ -606,8 +546,11 @@ LRESULT CALLBACK CMtaOleClipboard::mtaOleReqWndProc( HWND
hWnd, UINT uMsg, WPARA
return lResult;
}
-void CMtaOleClipboard::createMtaOleReqWnd( )
+unsigned int CMtaOleClipboard::run()
{
+ HRESULT hr = OleInitialize(nullptr);
+ OSL_ASSERT(SUCCEEDED(hr));
+
WNDCLASSEXW wcex;
SalData* pSalData = GetSalData();
@@ -628,19 +571,11 @@ void CMtaOleClipboard::createMtaOleReqWnd( )
wcex.lpszClassName = g_szWndClsName;
wcex.hIconSm = nullptr;
- m_MtaOleReqWndClassAtom = RegisterClassExW( &wcex );
+ ATOM aMtaOleReqWndClassAtom = RegisterClassExW(&wcex);
- if ( 0 != m_MtaOleReqWndClassAtom )
+ if (0 != aMtaOleReqWndClassAtom)
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;
@@ -659,6 +594,9 @@ unsigned int CMtaOleClipboard::run( )
else
nRet = ~0U;
+ if (aMtaOleReqWndClassAtom)
+ UnregisterClassW(g_szWndClsName, nullptr);
+
OleUninitialize( );
return nRet;
@@ -675,53 +613,6 @@ unsigned int WINAPI CMtaOleClipboard::oleThreadProc(
LPVOID pParam )
return pInst->run( );
}
-unsigned int WINAPI CMtaOleClipboard::clipboardChangedNotifierThreadProc(
LPVOID pParam )
-{
-
osl_setThreadName("CMtaOleClipboard::clipboardChangedNotifierThreadProc()");
- CMtaOleClipboard* pInst = static_cast< CMtaOleClipboard* >( pParam );
- OSL_ASSERT( nullptr != pInst );
-
- CoInitializeEx( nullptr, COINIT_APARTMENTTHREADED );
-
- // 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 aGuard( pInst->m_ClipboardChangedEventCountMutex );
-
- if ( pInst->m_ClipboardChangedEventCount > 0 )
- {
- pInst->m_ClipboardChangedEventCount--;
- if ( 0 == pInst->m_ClipboardChangedEventCount )
- ResetEvent( pInst->m_hClipboardChangedEvent );
-
- aGuard.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
- aGuard.clear( );
- }
-
- CoUninitialize( );
-
- return 0;
-}
-
bool CMtaOleClipboard::WaitForThreadReady( ) const
{
bool bRet = false;
diff --git a/vcl/win/dtrans/MtaOleClipb.hxx b/vcl/win/dtrans/MtaOleClipb.hxx
index c406f81aafd3..d0dd539d46a5 100644
--- a/vcl/win/dtrans/MtaOleClipb.hxx
+++ b/vcl/win/dtrans/MtaOleClipb.hxx
@@ -20,7 +20,6 @@
#pragma once
#include <sal/types.h>
-#include <osl/mutex.hxx>
#include <objidl.h>
@@ -31,12 +30,14 @@
// only from within the clipboard service and the methods
// of the clipboard service are already synchronized
+// Its thread creates a hidden window, which serves as a request target, so we
+// can guarantee synchronization.
+
class CMtaOleClipboard
{
public:
typedef void ( WINAPI *LPFNC_CLIPVIEWER_CALLBACK_t )( void );
-public:
CMtaOleClipboard( );
~CMtaOleClipboard( );
@@ -55,17 +56,12 @@ public:
private:
unsigned int run( );
- // create a hidden window which serves as a request target; so we
- // guarantee synchronization
- void createMtaOleReqWnd( );
-
// message support
bool postMessage( UINT msg, WPARAM wParam = 0, LPARAM lParam = 0 );
LRESULT sendMessage( UINT msg, WPARAM wParam = 0, LPARAM lParam = 0 );
// message handler functions; remember these functions are called
// from a different thread context!
-
static HRESULT onSetClipboard( IDataObject* pIDataObject );
static HRESULT onGetClipboard( LPSTREAM* ppStream );
static HRESULT onFlushClipboard( );
@@ -77,34 +73,18 @@ private:
static LRESULT CALLBACK mtaOleReqWndProc( HWND hWnd, UINT uMsg, WPARAM
wParam, LPARAM lParam );
static unsigned int WINAPI oleThreadProc( LPVOID pParam );
- static unsigned int WINAPI clipboardChangedNotifierThreadProc( LPVOID
pParam );
-
bool WaitForThreadReady( ) const;
-private:
HANDLE m_hOleThread;
unsigned m_uOleThreadId;
HANDLE m_hEvtThrdReady;
HWND m_hwndMtaOleReqWnd;
HANDLE m_hEvtWndDisposed;
- ATOM m_MtaOleReqWndClassAtom;
LPFNC_CLIPVIEWER_CALLBACK_t m_pfncClipViewerCallback;
bool m_bInRegisterClipViewer;
- bool m_bRunClipboardNotifierThread;
- HANDLE m_hClipboardChangedNotifierThread;
- HANDLE m_hClipboardChangedNotifierEvents[2];
- HANDLE& m_hClipboardChangedEvent;
- HANDLE& m_hTerminateClipboardChangedNotifierEvent;
- osl::Mutex m_ClipboardChangedEventCountMutex;
- sal_Int32 m_ClipboardChangedEventCount;
-
- osl::Mutex m_pfncClipViewerCallbackMutex;
-
static CMtaOleClipboard* s_theMtaOleClipboardInst;
-// not allowed
-private:
CMtaOleClipboard( const CMtaOleClipboard& );
CMtaOleClipboard& operator=( const CMtaOleClipboard& );
diff --git a/vcl/win/dtrans/WinClipboard.cxx b/vcl/win/dtrans/WinClipboard.cxx
index f50c1810f4ea..121b945ff4e9 100644
--- a/vcl/win/dtrans/WinClipboard.cxx
+++ b/vcl/win/dtrans/WinClipboard.cxx
@@ -63,6 +63,11 @@ CWinClipboard::CWinClipboard(const
uno::Reference<uno::XComponentContext>& rxCon
// the static callback function
s_pCWinClipbImpl = this;
registerClipboardViewer();
+
+
m_aNotifyClipboardChangeIdle.SetDebugName("CWinClipboard::m_aNotifyClipboardChangeIdle");
+ m_aNotifyClipboardChangeIdle.SetPriority(TaskPriority::HIGH_IDLE);
+ m_aNotifyClipboardChangeIdle.SetInvokeHandler(
+ LINK(this, CWinClipboard, ClipboardContentChangedHdl));
}
CWinClipboard::~CWinClipboard()
@@ -236,8 +241,10 @@ void SAL_CALL CWinClipboard::removeClipboardListener(
rBHelper.aLC.removeInterface(cppu::UnoType<decltype(listener)>::get(),
listener);
}
-void CWinClipboard::notifyAllClipboardListener()
+IMPL_LINK_NOARG(CWinClipboard, ClipboardContentChangedHdl, Timer*, void)
{
+ m_foreignContent.clear();
+
if (rBHelper.bDisposed)
return;
@@ -323,21 +330,20 @@ void
CWinClipboard::onReleaseDataObject(CXNotifyingDataObject* theCaller)
void CWinClipboard::registerClipboardViewer()
{
-
m_MtaOleClipboard.registerClipViewer(CWinClipboard::onClipboardContentChanged);
+ m_MtaOleClipboard.registerClipViewer(CWinClipboard::onWM_CLIPBOARDUPDATE);
}
void CWinClipboard::unregisterClipboardViewer() {
m_MtaOleClipboard.registerClipViewer(nullptr); }
-void WINAPI CWinClipboard::onClipboardContentChanged()
+void WINAPI CWinClipboard::onWM_CLIPBOARDUPDATE()
{
osl::MutexGuard aGuard(s_aMutex);
- // reassociation to instance through static member
- if (nullptr != s_pCWinClipbImpl)
- {
- s_pCWinClipbImpl->m_foreignContent.clear();
- s_pCWinClipbImpl->notifyAllClipboardListener();
- }
+ if (!s_pCWinClipbImpl)
+ return;
+
+ if (!s_pCWinClipbImpl->m_aNotifyClipboardChangeIdle.IsActive())
+ s_pCWinClipbImpl->m_aNotifyClipboardChangeIdle.Start();
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/vcl/win/dtrans/WinClipboard.hxx b/vcl/win/dtrans/WinClipboard.hxx
index 1b0a05a3450d..06bcdce0fc64 100644
--- a/vcl/win/dtrans/WinClipboard.hxx
+++ b/vcl/win/dtrans/WinClipboard.hxx
@@ -32,6 +32,7 @@
#include <com/sun/star/lang/XServiceInfo.hpp>
#include <com/sun/star/uno/XComponentContext.hpp>
#include <osl/conditn.hxx>
+#include <vcl/Idle.hxx>
#include "MtaOleClipb.hxx"
@@ -70,6 +71,7 @@ class CWinClipboard final
CXNotifyingDataObject* m_pCurrentClipContent;
com::sun::star::uno::Reference<com::sun::star::datatransfer::XTransferable>
m_foreignContent;
osl::Mutex m_ClipContentMutex;
+ Idle m_aNotifyClipboardChangeIdle;
static osl::Mutex s_aMutex;
static CWinClipboard* s_pCWinClipbImpl;
@@ -80,7 +82,8 @@ class CWinClipboard final
void registerClipboardViewer();
void unregisterClipboardViewer();
- static void WINAPI onClipboardContentChanged();
+ static void WINAPI onWM_CLIPBOARDUPDATE();
+ DECL_DLLPRIVATE_LINK(ClipboardContentChangedHdl, Timer*, void);
public:
CWinClipboard(const css::uno::Reference<css::uno::XComponentContext>&
rxContext,
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