/usr/include/thunderbird/mozilla/VsyncDispatcher.h is in thunderbird-dev 1:38.6.0+build1-0ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 | /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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 mozilla_widget_VsyncDispatcher_h
#define mozilla_widget_VsyncDispatcher_h
#include "mozilla/Mutex.h"
#include "mozilla/TimeStamp.h"
#include "nsISupportsImpl.h"
#include "nsTArray.h"
#include "nsRefPtr.h"
namespace mozilla {
class VsyncObserver
{
NS_INLINE_DECL_THREADSAFE_REFCOUNTING(VsyncObserver)
public:
// The method called when a vsync occurs. Return true if some work was done.
// In general, this vsync notification will occur on the hardware vsync
// thread from VsyncSource. But it might also be called on PVsync ipc thread
// if this notification is cross process. Thus all observer should check the
// thread model before handling the real task.
virtual bool NotifyVsync(TimeStamp aVsyncTimestamp) = 0;
protected:
VsyncObserver() {}
virtual ~VsyncObserver() {}
}; // VsyncObserver
// Used to dispatch vsync events in the parent process to compositors
class CompositorVsyncDispatcher final
{
NS_INLINE_DECL_THREADSAFE_REFCOUNTING(CompositorVsyncDispatcher)
public:
CompositorVsyncDispatcher();
// Called on the vsync thread when a hardware vsync occurs
void NotifyVsync(TimeStamp aVsyncTimestamp);
// Compositor vsync observers must be added/removed on the compositor thread
void SetCompositorVsyncObserver(VsyncObserver* aVsyncObserver);
void Shutdown();
// This can be used to enable or disable thread assertions.
// This is useful for gtests because usually things run
// in only one thread in that environment
static void SetThreadAssertionsEnabled(bool aEnable);
private:
void AssertOnCompositorThread();
virtual ~CompositorVsyncDispatcher();
void ObserveVsync(bool aEnable);
Mutex mCompositorObserverLock;
nsRefPtr<VsyncObserver> mCompositorVsyncObserver;
bool mDidShutdown;
};
// Dispatch vsync event to ipc actor parent and chrome RefreshTimer.
class RefreshTimerVsyncDispatcher final
{
NS_INLINE_DECL_THREADSAFE_REFCOUNTING(RefreshTimerVsyncDispatcher)
public:
RefreshTimerVsyncDispatcher();
// Please check CompositorVsyncDispatcher::NotifyVsync().
void NotifyVsync(TimeStamp aVsyncTimestamp);
// Set chrome process's RefreshTimer to this dispatcher.
// This function can be called from any thread.
void SetParentRefreshTimer(VsyncObserver* aVsyncObserver);
// Add or remove the content process' RefreshTimer to this dispatcher. This
// will be a no-op for AddChildRefreshTimer() if the observer is already
// registered.
// These functions can be called from any thread.
void AddChildRefreshTimer(VsyncObserver* aVsyncObserver);
void RemoveChildRefreshTimer(VsyncObserver* aVsyncObserver);
private:
virtual ~RefreshTimerVsyncDispatcher();
void UpdateVsyncStatus();
bool NeedsVsync();
Mutex mRefreshTimersLock;
nsRefPtr<VsyncObserver> mParentRefreshTimer;
nsTArray<nsRefPtr<VsyncObserver>> mChildRefreshTimers;
};
} // namespace mozilla
#endif // mozilla_widget_VsyncDispatcher_h
|