From 36d22d82aa202bb199967e9512281e9a53db42c9 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 21:33:14 +0200 Subject: Adding upstream version 115.7.0esr. Signed-off-by: Daniel Baumann --- ipc/glue/MessagePump.h | 203 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 203 insertions(+) create mode 100644 ipc/glue/MessagePump.h (limited to 'ipc/glue/MessagePump.h') diff --git a/ipc/glue/MessagePump.h b/ipc/glue/MessagePump.h new file mode 100644 index 0000000000..50b97efd79 --- /dev/null +++ b/ipc/glue/MessagePump.h @@ -0,0 +1,203 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* vim: set ts=8 sts=2 et sw=2 tw=80: */ +/* 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/. */ + +#ifndef __IPC_GLUE_MESSAGEPUMP_H__ +#define __IPC_GLUE_MESSAGEPUMP_H__ + +#include "base/message_pump_default.h" +#if defined(XP_WIN) +# include "base/message_pump_win.h" +#elif defined(XP_DARWIN) +# include "base/message_pump_mac.h" +#endif + +#include "base/time.h" +#include "mozilla/Attributes.h" +#include "mozilla/Mutex.h" +#include "nsCOMPtr.h" +#include "nsIThreadInternal.h" + +class nsIEventTarget; +class nsITimer; + +namespace mozilla { +namespace ipc { + +class DoWorkRunnable; + +class MessagePump : public base::MessagePumpDefault { + friend class DoWorkRunnable; + + public: + explicit MessagePump(nsISerialEventTarget* aEventTarget); + + // From base::MessagePump. + virtual void Run(base::MessagePump::Delegate* aDelegate) override; + + // From base::MessagePump. + virtual void ScheduleWork() override; + + // From base::MessagePump. + virtual void ScheduleWorkForNestedLoop() override; + + // From base::MessagePump. + virtual void ScheduleDelayedWork( + const base::TimeTicks& aDelayedWorkTime) override; + + virtual nsISerialEventTarget* GetXPCOMThread() override; + + protected: + virtual ~MessagePump(); + + private: + // Only called by DoWorkRunnable. + void DoDelayedWork(base::MessagePump::Delegate* aDelegate); + + protected: + nsISerialEventTarget* mEventTarget; + + // mDelayedWorkTimer and mEventTarget are set in Run() by this class or its + // subclasses. + nsCOMPtr mDelayedWorkTimer; + + private: + // Only accessed by this class. + RefPtr mDoWorkEvent; +}; + +class MessagePumpForChildProcess final : public MessagePump { + public: + MessagePumpForChildProcess() : MessagePump(nullptr), mFirstRun(true) {} + + virtual void Run(base::MessagePump::Delegate* aDelegate) override; + + private: + ~MessagePumpForChildProcess() = default; + + bool mFirstRun; +}; + +class MessagePumpForNonMainThreads final : public MessagePump { + public: + explicit MessagePumpForNonMainThreads(nsISerialEventTarget* aEventTarget) + : MessagePump(aEventTarget) {} + + virtual void Run(base::MessagePump::Delegate* aDelegate) override; + + private: + ~MessagePumpForNonMainThreads() = default; +}; + +#if defined(XP_WIN) +// Extends the TYPE_UI message pump to process xpcom events. +class MessagePumpForNonMainUIThreads final : public base::MessagePumpForUI, + public nsIThreadObserver { + public: + NS_DECL_ISUPPORTS_INHERITED + NS_DECL_NSITHREADOBSERVER + + public: + explicit MessagePumpForNonMainUIThreads(nsISerialEventTarget* aEventTarget) + : mInWait(false), mWaitLock("mInWait") {} + + // The main run loop for this thread. + virtual void DoRunLoop() override; + + virtual nsISerialEventTarget* GetXPCOMThread() override { + return nullptr; // not sure what to do with this one + } + + protected: + void SetInWait() { + MutexAutoLock lock(mWaitLock); + mInWait = true; + } + + void ClearInWait() { + MutexAutoLock lock(mWaitLock); + mInWait = false; + } + + bool GetInWait() { + MutexAutoLock lock(mWaitLock); + return mInWait; + } + + private: + ~MessagePumpForNonMainUIThreads() {} + + bool mInWait MOZ_GUARDED_BY(mWaitLock); + mozilla::Mutex mWaitLock; +}; +#elif defined(XP_DARWIN) +// Extends the CFRunLoopBase message pump to process xpcom events. Based on +// MessagePumpNSRunLoop. +class MessagePumpForNonMainUIThreads final + : public base::MessagePumpCFRunLoopBase, + public nsIThreadObserver { + public: + NS_DECL_ISUPPORTS_INHERITED + NS_DECL_NSITHREADOBSERVER + + public: + explicit MessagePumpForNonMainUIThreads(nsISerialEventTarget* aEventTarget); + + void DoRun(base::MessagePump::Delegate* aDelegate) override; + void Quit() override; + + nsISerialEventTarget* GetXPCOMThread() override { return mEventTarget; } + + private: + ~MessagePumpForNonMainUIThreads(); + + nsISerialEventTarget* mEventTarget; + + // A source that doesn't do anything but provide something signalable + // attached to the run loop. This source will be signalled when Quit + // is called, to cause the loop to wake up so that it can stop. + CFRunLoopSourceRef quit_source_; + + // False after Quit is called. + bool keep_running_; + + DISALLOW_COPY_AND_ASSIGN(MessagePumpForNonMainUIThreads); +}; +#endif // defined(XP_DARWIN) + +#if defined(MOZ_WIDGET_ANDROID) +/*` + * The MessagePumpForAndroidUI exists to enable IPDL in the Android UI thread. + * The Android UI thread event loop is controlled by Android. This prevents + * running an existing MessagePump implementation in the Android UI thread. In + * order to enable IPDL on the Android UI thread it is necessary to have a + * non-looping MessagePump. This class enables forwarding of nsIRunnables from + * MessageLoop::PostTask_Helper to the registered nsIEventTarget with out the + * need to control the event loop. The only member function that should be + * invoked is GetXPCOMThread. All other member functions will invoke MOZ_CRASH + */ +class MessagePumpForAndroidUI : public base::MessagePump { + public: + explicit MessagePumpForAndroidUI(nsISerialEventTarget* aEventTarget) + : mEventTarget(aEventTarget) {} + + virtual void Run(Delegate* delegate); + virtual void Quit(); + virtual void ScheduleWork(); + virtual void ScheduleDelayedWork(const base::TimeTicks& delayed_work_time); + virtual nsISerialEventTarget* GetXPCOMThread() { return mEventTarget; } + + private: + ~MessagePumpForAndroidUI() {} + MessagePumpForAndroidUI() {} + + nsISerialEventTarget* mEventTarget; +}; +#endif // defined(MOZ_WIDGET_ANDROID) + +} /* namespace ipc */ +} /* namespace mozilla */ + +#endif /* __IPC_GLUE_MESSAGEPUMP_H__ */ -- cgit v1.2.3