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/* -*- 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 MOZILLA_GFX_SHAREDSURFACESPARENT_H
#define MOZILLA_GFX_SHAREDSURFACESPARENT_H
#include <stdint.h> // for uint32_t
#include "mozilla/Attributes.h" // for override
#include "mozilla/StaticMutex.h" // for StaticMutex
#include "mozilla/StaticPtr.h" // for StaticAutoPtr
#include "mozilla/RefPtr.h" // for already_AddRefed
#include "mozilla/ipc/SharedMemory.h" // for SharedMemory, etc
#include "mozilla/gfx/2D.h" // for SurfaceFormat
#include "mozilla/gfx/Point.h" // for IntSize
#include "mozilla/layers/LayersSurfaces.h" // for SurfaceDescriptorShared
#include "mozilla/layers/SourceSurfaceSharedData.h"
#include "mozilla/webrender/WebRenderTypes.h" // for wr::ExternalImageId
#include "nsExpirationTracker.h"
#include "nsRefPtrHashtable.h"
namespace mozilla {
namespace gfx {
class DataSourceSurface;
} // namespace gfx
namespace layers {
class CompositorManagerParent;
class SharedSurfacesMemoryReport;
class SharedSurfacesParent final {
public:
static void Initialize();
static void ShutdownRenderThread();
static void Shutdown();
// Get without increasing the consumer count.
static already_AddRefed<gfx::DataSourceSurface> Get(
const wr::ExternalImageId& aId);
// Get but also increase the consumer count. Must call Release after finished.
static already_AddRefed<gfx::DataSourceSurface> Acquire(
const wr::ExternalImageId& aId);
static bool Release(const wr::ExternalImageId& aId, bool aForCreator = false);
static void Add(const wr::ExternalImageId& aId,
SurfaceDescriptorShared&& aDesc, base::ProcessId aPid);
static void Remove(const wr::ExternalImageId& aId);
static void RemoveAll(uint32_t aNamespace);
static void AccumulateMemoryReport(uint32_t aNamespace,
SharedSurfacesMemoryReport& aReport);
static bool AccumulateMemoryReport(SharedSurfacesMemoryReport& aReport);
static void AddTracking(gfx::SourceSurfaceSharedDataWrapper* aSurface);
static void RemoveTracking(gfx::SourceSurfaceSharedDataWrapper* aSurface);
static bool AgeOneGeneration(
nsTArray<RefPtr<gfx::SourceSurfaceSharedDataWrapper>>& aExpired);
static bool AgeAndExpireOneGeneration();
private:
friend class CompositorManagerParent;
friend class gfx::SourceSurfaceSharedDataWrapper;
SharedSurfacesParent();
static void AddSameProcess(const wr::ExternalImageId& aId,
gfx::SourceSurfaceSharedData* aSurface);
static void AddTrackingLocked(gfx::SourceSurfaceSharedDataWrapper* aSurface,
const StaticMutexAutoLock& aAutoLock);
static void RemoveTrackingLocked(
gfx::SourceSurfaceSharedDataWrapper* aSurface,
const StaticMutexAutoLock& aAutoLock);
static bool AgeOneGenerationLocked(
nsTArray<RefPtr<gfx::SourceSurfaceSharedDataWrapper>>& aExpired,
const StaticMutexAutoLock& aAutoLock);
static void ExpireMap(
nsTArray<RefPtr<gfx::SourceSurfaceSharedDataWrapper>>& aExpired);
static StaticMutex sMutex MOZ_UNANNOTATED;
static StaticAutoPtr<SharedSurfacesParent> sInstance;
nsRefPtrHashtable<nsUint64HashKey, gfx::SourceSurfaceSharedDataWrapper>
mSurfaces;
class MappingTracker final
: public ExpirationTrackerImpl<gfx::SourceSurfaceSharedDataWrapper, 4,
StaticMutex, StaticMutexAutoLock> {
public:
explicit MappingTracker(uint32_t aExpirationTimeoutMS,
nsIEventTarget* aEventTarget)
: ExpirationTrackerImpl<gfx::SourceSurfaceSharedDataWrapper, 4,
StaticMutex, StaticMutexAutoLock>(
aExpirationTimeoutMS, "SharedMappingTracker", aEventTarget) {}
void TakeExpired(
nsTArray<RefPtr<gfx::SourceSurfaceSharedDataWrapper>>& aExpired,
const StaticMutexAutoLock& aAutoLock);
protected:
void NotifyExpiredLocked(gfx::SourceSurfaceSharedDataWrapper* aSurface,
const StaticMutexAutoLock& aAutoLock) override;
void NotifyHandlerEndLocked(const StaticMutexAutoLock& aAutoLock) override {
}
void NotifyHandlerEnd() override;
StaticMutex& GetMutex() override { return sMutex; }
nsTArray<RefPtr<gfx::SourceSurfaceSharedDataWrapper>> mExpired;
};
MappingTracker mTracker;
};
/**
* Helper class that is used to keep SourceSurfaceSharedDataWrapper objects
* around as long as one of the dependent IPDL actors is still alive and may
* reference them for a given PCompositorManager namespace.
*/
class SharedSurfacesHolder final {
NS_INLINE_DECL_THREADSAFE_REFCOUNTING(SharedSurfacesHolder)
public:
explicit SharedSurfacesHolder(uint32_t aNamespace) : mNamespace(aNamespace) {}
already_AddRefed<gfx::DataSourceSurface> Get(const wr::ExternalImageId& aId) {
uint32_t extNamespace = static_cast<uint32_t>(wr::AsUint64(aId) >> 32);
if (NS_WARN_IF(extNamespace != mNamespace)) {
MOZ_ASSERT_UNREACHABLE("Wrong namespace?");
return nullptr;
}
return SharedSurfacesParent::Get(aId);
}
private:
~SharedSurfacesHolder() { SharedSurfacesParent::RemoveAll(mNamespace); }
uint32_t mNamespace;
};
} // namespace layers
} // namespace mozilla
#endif
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