91526a2f53
The immediate reason for this is that pipes are broken in the Emscripten runtime, see https://github.com/emscripten-core/emscripten/issues/13214. But if we can drop the use of a pipe for other platforms, too, why not. Without this, when attemting to run Collabora Online as WASM, I get: Aborted(Assertion failed: nRet == 1, at: .../vcl/headless/svpinst.cxx,538,DoYield) It is quite possible that the code could be simplified drastically. I only replaced the use of a pipe with hopefully equivalent use of a queue, a condition variable, and a mutex. Change-Id: I9259ba36afeabce6474a1aec827d01bcbbd4412b Reviewed-on: https://gerrit.libreoffice.org/c/core/+/144944 Reviewed-by: Michael Meeks <michael.meeks@collabora.com> Tested-by: Jenkins
192 lines
7.2 KiB
C++
192 lines
7.2 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* This file incorporates work covered by the following license notice:
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.apache.org/licenses/LICENSE-2.0 .
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*/
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#ifndef INCLUDED_VCL_INC_HEADLESS_SVPINST_HXX
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#define INCLUDED_VCL_INC_HEADLESS_SVPINST_HXX
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#include <osl/thread.hxx>
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#include <osl/conditn.hxx>
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#include <salinst.hxx>
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#include <saltimer.hxx>
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#include <salusereventlist.hxx>
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#include <unx/geninst.h>
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#include <unx/genprn.h>
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#include <condition_variable>
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#include <mutex>
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#include <queue>
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#include <sys/time.h>
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#ifdef IOS
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#define SvpSalInstance AquaSalInstance
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#endif
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class SvpSalInstance;
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class SvpSalTimer final : public SalTimer
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{
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SvpSalInstance* m_pInstance;
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public:
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SvpSalTimer( SvpSalInstance* pInstance ) : m_pInstance( pInstance ) {}
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virtual ~SvpSalTimer() override;
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// override all pure virtual methods
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virtual void Start( sal_uInt64 nMS ) override;
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virtual void Stop() override;
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};
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class SvpSalFrame;
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class GenPspGraphics;
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enum class SvpRequest
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{
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NONE,
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MainThreadDispatchOneEvent,
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MainThreadDispatchAllEvents,
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};
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class SvpSalYieldMutex final : public SalYieldMutex
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{
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private:
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// note: these members might as well live in SvpSalInstance, but there is
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// at least one subclass of SvpSalInstance (GTK3) that doesn't use them.
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friend class SvpSalInstance;
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// members for communication from main thread to non-main thread
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std::mutex m_FeedbackMutex;
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std::queue<bool> m_FeedbackPipe;
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std::condition_variable m_FeedbackCV;
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osl::Condition m_NonMainWaitingYieldCond;
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// members for communication from non-main thread to main thread
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bool m_bNoYieldLock = false; // accessed only on main thread
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std::mutex m_WakeUpMainMutex; // guard m_wakeUpMain & m_Request
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std::condition_variable m_WakeUpMainCond;
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bool m_wakeUpMain = false;
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SvpRequest m_Request = SvpRequest::NONE;
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virtual void doAcquire( sal_uInt32 nLockCount ) override;
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virtual sal_uInt32 doRelease( bool bUnlockAll ) override;
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public:
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SvpSalYieldMutex();
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virtual ~SvpSalYieldMutex() override;
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virtual bool IsCurrentThread() const override;
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};
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// NOTE: the functions IsMainThread, DoYield and Wakeup *require* the use of
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// SvpSalYieldMutex; if a subclass uses something else it must override these
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// (Wakeup is only called by SvpSalTimer and SvpSalFrame)
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class VCL_DLLPUBLIC SvpSalInstance : public SalGenericInstance, public SalUserEventList
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{
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timeval m_aTimeout;
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sal_uLong m_nTimeoutMS;
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oslThreadIdentifier m_MainThread;
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virtual void TriggerUserEventProcessing() override;
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virtual void ProcessEvent( SalUserEvent aEvent ) override;
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bool ImplYield(bool bWait, bool bHandleAllCurrentEvents);
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public:
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static SvpSalInstance* s_pDefaultInstance;
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SvpSalInstance( std::unique_ptr<SalYieldMutex> pMutex );
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virtual ~SvpSalInstance() override;
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void CloseWakeupPipe();
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void Wakeup(SvpRequest request = SvpRequest::NONE);
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void StartTimer( sal_uInt64 nMS );
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void StopTimer();
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inline void registerFrame( SalFrame* pFrame );
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inline void deregisterFrame( SalFrame* pFrame );
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bool CheckTimeout( bool bExecuteTimers = true );
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// Frame
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virtual SalFrame* CreateChildFrame( SystemParentData* pParent, SalFrameStyleFlags nStyle ) override;
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virtual SalFrame* CreateFrame( SalFrame* pParent, SalFrameStyleFlags nStyle ) override;
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virtual void DestroyFrame( SalFrame* pFrame ) override;
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// Object (System Child Window)
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virtual SalObject* CreateObject( SalFrame* pParent, SystemWindowData* pWindowData, bool bShow ) override;
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virtual void DestroyObject( SalObject* pObject ) override;
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// VirtualDevice
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// nDX and nDY in Pixel
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// nBitCount: 0 == Default(=as window) / 1 == Mono
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// pData allows for using a system dependent graphics or device context
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virtual std::unique_ptr<SalVirtualDevice>
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CreateVirtualDevice( SalGraphics& rGraphics,
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tools::Long &nDX, tools::Long &nDY,
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DeviceFormat eFormat, const SystemGraphicsData *pData = nullptr ) override;
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// Printer
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// pSetupData->mpDriverData can be 0
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// pSetupData must be updated with the current
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// JobSetup
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virtual SalInfoPrinter* CreateInfoPrinter( SalPrinterQueueInfo* pQueueInfo,
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ImplJobSetup* pSetupData ) override;
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virtual void DestroyInfoPrinter( SalInfoPrinter* pPrinter ) override;
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virtual std::unique_ptr<SalPrinter> CreatePrinter( SalInfoPrinter* pInfoPrinter ) override;
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virtual void GetPrinterQueueInfo( ImplPrnQueueList* pList ) override;
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virtual void GetPrinterQueueState( SalPrinterQueueInfo* pInfo ) override;
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virtual OUString GetDefaultPrinter() override;
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virtual void PostPrintersChanged() override;
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// SalTimer
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virtual SalTimer* CreateSalTimer() override;
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// SalSystem
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virtual SalSystem* CreateSalSystem() override;
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// SalBitmap
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virtual std::shared_ptr<SalBitmap> CreateSalBitmap() override;
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// wait next event and dispatch
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// must returned by UserEvent (SalFrame::PostEvent)
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// and timer
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virtual bool DoYield(bool bWait, bool bHandleAllCurrentEvents) override;
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virtual bool AnyInput( VclInputFlags nType ) override;
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virtual bool IsMainThread() const override;
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virtual void updateMainThread() override;
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virtual OUString GetConnectionIdentifier() override;
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virtual void AddToRecentDocumentList(const OUString& rFileUrl, const OUString& rMimeType, const OUString& rDocumentService) override;
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virtual std::unique_ptr<GenPspGraphics> CreatePrintGraphics() override;
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virtual const cairo_font_options_t* GetCairoFontOptions() override;
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};
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inline void SvpSalInstance::registerFrame( SalFrame* pFrame )
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{
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insertFrame( pFrame );
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}
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inline void SvpSalInstance::deregisterFrame( SalFrame* pFrame )
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{
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eraseFrame( pFrame );
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}
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VCL_DLLPUBLIC cairo_surface_t* get_underlying_cairo_surface(const VirtualDevice& rDevice);
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#endif // INCLUDED_VCL_INC_HEADLESS_SVPINST_HXX
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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