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Diffstat (limited to 'vcl/headless/svpinst.cxx')
| -rw-r--r-- | vcl/headless/svpinst.cxx | 602 |
1 files changed, 602 insertions, 0 deletions
diff --git a/vcl/headless/svpinst.cxx b/vcl/headless/svpinst.cxx new file mode 100644 index 000000000..bf53dc24f --- /dev/null +++ b/vcl/headless/svpinst.cxx @@ -0,0 +1,602 @@ +/* -*- 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 . + */ + +#include <config_features.h> +#include <sal/config.h> + +#include <mutex> + +#include <unistd.h> +#include <errno.h> +#include <fcntl.h> +#include <pthread.h> +#include <sys/time.h> +#include <poll.h> + +#include <sal/types.h> +#include <sal/log.hxx> + +#include <vcl/virdev.hxx> +#include <vcl/inputtypes.hxx> +#include <vcl/lok.hxx> + +#include <headless/svpinst.hxx> +#include <headless/svpframe.hxx> +#include <headless/svpdummies.hxx> +#include <headless/svpvd.hxx> +#ifdef IOS +# include <quartz/salbmp.h> +# include <quartz/salgdi.h> +# include <quartz/salvd.h> +#else +# include <cairo.h> +# include <headless/svpgdi.hxx> +#endif +#include <headless/svpbmp.hxx> + +#include <salframe.hxx> +#include <svdata.hxx> +// FIXME: remove when we re-work the svp mainloop +#include <unx/salunxtime.h> +#include <comphelper/lok.hxx> +#include <tools/debug.hxx> + +SvpSalInstance* SvpSalInstance::s_pDefaultInstance = nullptr; + +#ifndef NDEBUG +static bool g_CheckedMutex = false; + +#define DBG_TESTSVPYIELDMUTEX() \ +do { \ + if (!g_CheckedMutex) \ + { \ + assert(dynamic_cast<SvpSalYieldMutex*>(GetYieldMutex()) != nullptr \ + && "This SvpSalInstance function requires use of SvpSalYieldMutex"); \ + g_CheckedMutex = true; \ + } \ +} while(false) + +#else // NDEBUG +#define DBG_TESTSVPYIELDMUTEX() ((void)0) +#endif + +#if !defined(ANDROID) && !defined(IOS) + +static void atfork_child() +{ + if (SvpSalInstance::s_pDefaultInstance != nullptr) + { + SvpSalInstance::s_pDefaultInstance->CloseWakeupPipe(false); + SvpSalInstance::s_pDefaultInstance->CreateWakeupPipe(false); + } +} + +#endif + +SvpSalInstance::SvpSalInstance( std::unique_ptr<SalYieldMutex> pMutex ) + : SalGenericInstance( std::move(pMutex) ) +{ + m_aTimeout.tv_sec = 0; + m_aTimeout.tv_usec = 0; + m_nTimeoutMS = 0; + + m_MainThread = osl::Thread::getCurrentIdentifier(); + CreateWakeupPipe(true); + if( s_pDefaultInstance == nullptr ) + s_pDefaultInstance = this; +#if !defined(ANDROID) && !defined(IOS) + pthread_atfork(nullptr, nullptr, atfork_child); +#endif +} + +SvpSalInstance::~SvpSalInstance() +{ + if( s_pDefaultInstance == this ) + s_pDefaultInstance = nullptr; + CloseWakeupPipe(true); +} + +void SvpSalInstance::CloseWakeupPipe(bool log) +{ + SvpSalYieldMutex *const pMutex(dynamic_cast<SvpSalYieldMutex*>(GetYieldMutex())); + if (!pMutex) + return; + if (pMutex->m_FeedbackFDs[0] != -1) + { + if (log) + { + SAL_INFO("vcl.headless", "CloseWakeupPipe: Closing inherited feedback pipe: [" << pMutex->m_FeedbackFDs[0] << "," << pMutex->m_FeedbackFDs[1] << "]"); + } + close (pMutex->m_FeedbackFDs[0]); + close (pMutex->m_FeedbackFDs[1]); + pMutex->m_FeedbackFDs[0] = pMutex->m_FeedbackFDs[1] = -1; + } +} + +void SvpSalInstance::CreateWakeupPipe(bool log) +{ + SvpSalYieldMutex *const pMutex(dynamic_cast<SvpSalYieldMutex*>(GetYieldMutex())); + if (!pMutex) + return; + if (pipe (pMutex->m_FeedbackFDs) == -1) + { + if (log) + { + SAL_WARN("vcl.headless", "Could not create feedback pipe: " << strerror(errno)); + std::abort(); + } + } + else + { + if (log) + { + SAL_INFO("vcl.headless", "CreateWakeupPipe: Created feedback pipe: [" << pMutex->m_FeedbackFDs[0] << "," << pMutex->m_FeedbackFDs[1] << "]"); + } + + int flags; + + // set close-on-exec descriptor flag. + if ((flags = fcntl (pMutex->m_FeedbackFDs[0], F_GETFD)) != -1) + { + flags |= FD_CLOEXEC; + (void) fcntl(pMutex->m_FeedbackFDs[0], F_SETFD, flags); + } + if ((flags = fcntl (pMutex->m_FeedbackFDs[1], F_GETFD)) != -1) + { + flags |= FD_CLOEXEC; + (void) fcntl(pMutex->m_FeedbackFDs[1], F_SETFD, flags); + } + + // retain the default blocking I/O for feedback pipe + } +} + +void SvpSalInstance::TriggerUserEventProcessing() +{ + Wakeup(); +} + +void SvpSalInstance::Wakeup(SvpRequest const request) +{ + DBG_TESTSVPYIELDMUTEX(); + + ImplSVData* pSVData = ImplGetSVData(); + if (pSVData->mpWakeCallback && pSVData->mpPollClosure) + pSVData->mpWakeCallback(pSVData->mpPollClosure); + + SvpSalYieldMutex *const pMutex(static_cast<SvpSalYieldMutex*>(GetYieldMutex())); + std::scoped_lock<std::mutex> g(pMutex->m_WakeUpMainMutex); + if (request != SvpRequest::NONE) + pMutex->m_Request = request; + pMutex->m_wakeUpMain = true; + pMutex->m_WakeUpMainCond.notify_one(); +} + +bool SvpSalInstance::CheckTimeout( bool bExecuteTimers ) +{ + bool bRet = false; + if( m_aTimeout.tv_sec ) // timer is started + { + timeval aTimeOfDay; + gettimeofday( &aTimeOfDay, nullptr ); + if( aTimeOfDay >= m_aTimeout ) + { + bRet = true; + if( bExecuteTimers ) + { + // timed out, update timeout + m_aTimeout = aTimeOfDay; + m_aTimeout += m_nTimeoutMS; + + osl::Guard< comphelper::SolarMutex > aGuard( GetYieldMutex() ); + + // notify + ImplSVData* pSVData = ImplGetSVData(); + if( pSVData->maSchedCtx.mpSalTimer ) + pSVData->maSchedCtx.mpSalTimer->CallCallback(); + } + } + } + return bRet; +} + +SalFrame* SvpSalInstance::CreateChildFrame( SystemParentData* /*pParent*/, SalFrameStyleFlags nStyle ) +{ + return new SvpSalFrame( this, nullptr, nStyle ); +} + +SalFrame* SvpSalInstance::CreateFrame( SalFrame* pParent, SalFrameStyleFlags nStyle ) +{ + return new SvpSalFrame( this, pParent, nStyle ); +} + +void SvpSalInstance::DestroyFrame( SalFrame* pFrame ) +{ + delete pFrame; +} + +SalObject* SvpSalInstance::CreateObject( SalFrame*, SystemWindowData*, bool ) +{ + return new SvpSalObject; +} + +void SvpSalInstance::DestroyObject( SalObject* pObject ) +{ + delete pObject; +} + +#ifndef IOS + +std::unique_ptr<SalVirtualDevice> SvpSalInstance::CreateVirtualDevice(SalGraphics& rGraphics, + tools::Long &nDX, tools::Long &nDY, + DeviceFormat /*eFormat*/, + const SystemGraphicsData* pGd) +{ + SvpSalGraphics *pSvpSalGraphics = dynamic_cast<SvpSalGraphics*>(&rGraphics); + assert(pSvpSalGraphics); +#ifndef ANDROID + // tdf#127529 normally pPreExistingTarget is null and we are a true virtualdevice drawing to a backing buffer. + // Occasionally, for canvas/slideshow, pPreExistingTarget is pre-provided as a hack to use the vcl drawing + // apis to render onto a preexisting cairo surface. The necessity for that precedes the use of cairo in vcl proper + cairo_surface_t* pPreExistingTarget = pGd ? static_cast<cairo_surface_t*>(pGd->pSurface) : nullptr; +#else + //ANDROID case + (void)pGd; + cairo_surface_t* pPreExistingTarget = nullptr; +#endif + std::unique_ptr<SalVirtualDevice> pNew(new SvpSalVirtualDevice(pSvpSalGraphics->getSurface(), pPreExistingTarget)); + pNew->SetSize( nDX, nDY ); + return pNew; +} + +cairo_surface_t* get_underlying_cairo_surface(const VirtualDevice& rDevice) +{ + return static_cast<SvpSalVirtualDevice*>(rDevice.mpVirDev.get())->GetSurface(); +} + +const cairo_font_options_t* SvpSalInstance::GetCairoFontOptions() +{ + static cairo_font_options_t *gOptions = nullptr; + if (!gOptions) + { + gOptions = cairo_font_options_create(); + cairo_font_options_set_antialias(gOptions, CAIRO_ANTIALIAS_GRAY); + } + return gOptions; +} + +#else // IOS + +const cairo_font_options_t* SvpSalInstance::GetCairoFontOptions() +{ + return nullptr; +} + +#endif + +SalTimer* SvpSalInstance::CreateSalTimer() +{ + return new SvpSalTimer( this ); +} + +SalSystem* SvpSalInstance::CreateSalSystem() +{ + return new SvpSalSystem(); +} + +std::shared_ptr<SalBitmap> SvpSalInstance::CreateSalBitmap() +{ +#ifdef IOS + return std::make_shared<QuartzSalBitmap>(); +#else + return std::make_shared<SvpSalBitmap>(); +#endif +} + +void SvpSalInstance::ProcessEvent( SalUserEvent aEvent ) +{ + DBG_TESTSVPYIELDMUTEX(); + + aEvent.m_pFrame->CallCallback( aEvent.m_nEvent, aEvent.m_pData ); + if( aEvent.m_nEvent == SalEvent::Resize ) + { + // this would be a good time to post a paint + const SvpSalFrame* pSvpFrame = static_cast<const SvpSalFrame*>( aEvent.m_pFrame); + pSvpFrame->PostPaint(); + } + + SvpSalYieldMutex *const pMutex(static_cast<SvpSalYieldMutex*>(GetYieldMutex())); + pMutex->m_NonMainWaitingYieldCond.set(); +} + +SvpSalYieldMutex::SvpSalYieldMutex() +{ +#ifndef IOS + m_FeedbackFDs[0] = m_FeedbackFDs[1] = -1; +#endif +} + +SvpSalYieldMutex::~SvpSalYieldMutex() +{ +} + +void SvpSalYieldMutex::doAcquire(sal_uInt32 const nLockCount) +{ + auto *const pInst = static_cast<SvpSalInstance*>(GetSalInstance()); + if (pInst && pInst->IsMainThread()) + { + if (m_bNoYieldLock) + return; + + do + { + SvpRequest request = SvpRequest::NONE; + { + std::unique_lock<std::mutex> g(m_WakeUpMainMutex); + if (m_aMutex.tryToAcquire()) { + // if there's a request, the other thread holds m_aMutex + assert(m_Request == SvpRequest::NONE); + m_wakeUpMain = false; + break; + } + m_WakeUpMainCond.wait(g, [this]() { return m_wakeUpMain; }); + m_wakeUpMain = false; + std::swap(m_Request, request); + } + if (request != SvpRequest::NONE) + { + // nested Yield on behalf of another thread + assert(!m_bNoYieldLock); + m_bNoYieldLock = true; + bool const bEvents = pInst->DoYield(false, request == SvpRequest::MainThreadDispatchAllEvents); + m_bNoYieldLock = false; + if (write(m_FeedbackFDs[1], &bEvents, sizeof(bool)) != sizeof(bool)) + { + SAL_WARN("vcl.headless", "Could not write: " << strerror(errno)); + std::abort(); + } + } + } + while (true); + } + else + { + m_aMutex.acquire(); + } + ++m_nCount; + SalYieldMutex::doAcquire(nLockCount - 1); +} + +sal_uInt32 SvpSalYieldMutex::doRelease(bool const bUnlockAll) +{ + auto *const pInst = static_cast<SvpSalInstance*>(GetSalInstance()); + if (pInst && pInst->IsMainThread()) + { + if (m_bNoYieldLock) + return 1; + else + return SalYieldMutex::doRelease(bUnlockAll); + } + sal_uInt32 nCount; + { + // read m_nCount before doRelease + bool const isReleased(bUnlockAll || m_nCount == 1); + nCount = comphelper::SolarMutex::doRelease( bUnlockAll ); + + if (isReleased) + { + if (vcl::lok::isUnipoll()) + { + if (pInst) + pInst->Wakeup(); + } + else + { + std::scoped_lock<std::mutex> g(m_WakeUpMainMutex); + m_wakeUpMain = true; + m_WakeUpMainCond.notify_one(); + } + } + } + return nCount; +} + +bool SvpSalYieldMutex::IsCurrentThread() const +{ + if (GetSalInstance()->IsMainThread() && m_bNoYieldLock) + return true; + else + return SalYieldMutex::IsCurrentThread(); +} + +bool SvpSalInstance::IsMainThread() const +{ + return osl::Thread::getCurrentIdentifier() == m_MainThread; +} + +void SvpSalInstance::updateMainThread() +{ + if (!IsMainThread()) + { + m_MainThread = osl::Thread::getCurrentIdentifier(); + ImplGetSVData()->mnMainThreadId = osl::Thread::getCurrentIdentifier(); + } +} + +bool SvpSalInstance::ImplYield(bool bWait, bool bHandleAllCurrentEvents) +{ + DBG_TESTSVPYIELDMUTEX(); + DBG_TESTSOLARMUTEX(); + assert(IsMainThread()); + + bool bWasEvent = DispatchUserEvents(bHandleAllCurrentEvents); + if (!bHandleAllCurrentEvents && bWasEvent) + return true; + + bWasEvent = CheckTimeout() || bWasEvent; + const bool bMustSleep = bWait && !bWasEvent; + + // This is wrong and must be removed! + // We always want to drop the SolarMutex on yield; that is the whole point of yield. + if (!bMustSleep) + return bWasEvent; + + sal_Int64 nTimeoutMicroS = 0; + if (bMustSleep) + { + if (m_aTimeout.tv_sec) // Timer is started. + { + timeval Timeout; + // determine remaining timeout. + gettimeofday (&Timeout, nullptr); + if (m_aTimeout > Timeout) + nTimeoutMicroS = ((m_aTimeout.tv_sec - Timeout.tv_sec) * 1000 * 1000 + + (m_aTimeout.tv_usec - Timeout.tv_usec)); + } + else + nTimeoutMicroS = -1; // wait until something happens + } + + SolarMutexReleaser aReleaser; + + if (vcl::lok::isUnipoll()) + { + ImplSVData* pSVData = ImplGetSVData(); + if (pSVData->mpPollClosure) + { + int nPollResult = pSVData->mpPollCallback(pSVData->mpPollClosure, nTimeoutMicroS); + if (nPollResult < 0) + pSVData->maAppData.mbAppQuit = true; + bWasEvent = bWasEvent || (nPollResult != 0); + } + } + else if (bMustSleep) + { + SvpSalYieldMutex *const pMutex(static_cast<SvpSalYieldMutex*>(GetYieldMutex())); + std::unique_lock<std::mutex> g(pMutex->m_WakeUpMainMutex); + // wait for doRelease() or Wakeup() to set the condition + if (nTimeoutMicroS == -1) + { + pMutex->m_WakeUpMainCond.wait(g, + [pMutex]() { return pMutex->m_wakeUpMain; }); + } + else + { + int nTimeoutMS = nTimeoutMicroS / 1000; + if (nTimeoutMicroS % 1000) + nTimeoutMS += 1; + pMutex->m_WakeUpMainCond.wait_for(g, + std::chrono::milliseconds(nTimeoutMS), + [pMutex]() { return pMutex->m_wakeUpMain; }); + } + // here no need to check m_Request because Acquire will do it + } + + return bWasEvent; +} + +bool SvpSalInstance::DoYield(bool bWait, bool bHandleAllCurrentEvents) +{ + DBG_TESTSVPYIELDMUTEX(); + DBG_TESTSOLARMUTEX(); + + bool bWasEvent(false); + SvpSalYieldMutex *const pMutex(static_cast<SvpSalYieldMutex*>(GetYieldMutex())); + + if (IsMainThread()) + { + bWasEvent = ImplYield(bWait, bHandleAllCurrentEvents); + if (bWasEvent) + pMutex->m_NonMainWaitingYieldCond.set(); // wake up other threads + } + else + { + // TODO: use a SolarMutexReleaser here and drop the m_bNoYieldLock usage + Wakeup(bHandleAllCurrentEvents + ? SvpRequest::MainThreadDispatchAllEvents + : SvpRequest::MainThreadDispatchOneEvent); + + // blocking read (for synchronisation) + auto const nRet = read(pMutex->m_FeedbackFDs[0], &bWasEvent, sizeof(bool)); + assert(nRet == 1); (void) nRet; + if (!bWasEvent && bWait) + { + // block & release YieldMutex until the main thread does something + pMutex->m_NonMainWaitingYieldCond.reset(); + SolarMutexReleaser aReleaser; + pMutex->m_NonMainWaitingYieldCond.wait(); + } + } + + return bWasEvent; +} + +bool SvpSalInstance::AnyInput( VclInputFlags nType ) +{ + if( nType & VclInputFlags::TIMER ) + return CheckTimeout( false ); + return false; +} + +OUString SvpSalInstance::GetConnectionIdentifier() +{ + return OUString(); +} + +void SvpSalInstance::StopTimer() +{ + m_aTimeout.tv_sec = 0; + m_aTimeout.tv_usec = 0; + m_nTimeoutMS = 0; +} + +void SvpSalInstance::StartTimer( sal_uInt64 nMS ) +{ + timeval aPrevTimeout (m_aTimeout); + gettimeofday (&m_aTimeout, nullptr); + + m_nTimeoutMS = nMS; + m_aTimeout += m_nTimeoutMS; + + if ((aPrevTimeout > m_aTimeout) || (aPrevTimeout.tv_sec == 0)) + { + // Wakeup from previous timeout (or stopped timer). + Wakeup(); + } +} + +void SvpSalInstance::AddToRecentDocumentList(const OUString&, const OUString&, const OUString&) +{ +} + +SvpSalTimer::~SvpSalTimer() +{ +} + +void SvpSalTimer::Stop() +{ + m_pInstance->StopTimer(); +} + +void SvpSalTimer::Start( sal_uInt64 nMS ) +{ + m_pInstance->StartTimer( nMS ); +} + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |