Replace IOSurfaceManager by directly passing IOSurface Mach ports over Chrome IPC.

content/browser/browser_io_surface_manager_mac.h

-// Copyright 2015 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef CONTENT_BROWSER_BROWSER_IO_SURFACE_MANAGER_MAC_H_
-#define CONTENT_BROWSER_BROWSER_IO_SURFACE_MANAGER_MAC_H_
-
-#include <IOSurface/IOSurface.h>
-#include <mach/mach.h>
-
-#include <map>
-#include <utility>
-
-#include "base/containers/scoped_ptr_hash_map.h"
-#include "base/mac/dispatch_source_mach.h"
-#include "base/mac/scoped_cftyperef.h"
-#include "base/mac/scoped_mach_port.h"
-#include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
-#include "base/memory/singleton.h"
-#include "base/synchronization/lock.h"
-#include "content/common/content_export.h"
-#include "content/common/mac/io_surface_manager_messages.h"
-#include "content/common/mac/io_surface_manager_token.h"
-#include "ui/gfx/mac/io_surface_manager.h"
-
-namespace content {
-
-// TODO(ericrk): Use gfx::GenericSharedMemoryId as the |io_surface_id| in
-// this file. Allows for more type-safe usage of GpuMemoryBufferIds as the
-// type of the |io_surface_id|, as it is a typedef of
-// gfx::GenericSharedMemoryId.
-
-// Implementation of IOSurfaceManager that provides a mechanism for child
-// processes to register and acquire IOSurfaces through a Mach service.
-class CONTENT_EXPORT BrowserIOSurfaceManager : public gfx::IOSurfaceManager {
- public:
-  // Returns the global BrowserIOSurfaceManager.
-  static BrowserIOSurfaceManager* GetInstance();
-
-  // Look up the IOSurfaceManager service port that's been registered with
-  // the bootstrap server. |pid| is the process ID of the service.
-  static base::mac::ScopedMachSendRight LookupServicePort(pid_t pid);
-
-  // Returns the name of the service registered with the bootstrap server.
-  static std::string GetMachPortName();
-
-  // Overridden from IOSurfaceManager:
-  bool RegisterIOSurface(gfx::IOSurfaceId io_surface_id,
-                         int client_id,
-                         IOSurfaceRef io_surface) override;
-  void UnregisterIOSurface(gfx::IOSurfaceId io_surface_id,
-                           int client_id) override;
-  IOSurfaceRef AcquireIOSurface(gfx::IOSurfaceId io_surface_id) override;
-
-  // Performs any necessary setup that cannot happen in the constructor.
-  void EnsureRunning();
-
-  // Generate a unique unguessable token that the GPU process can use to
-  // register/unregister IOSurface for use by clients.
-  IOSurfaceManagerToken GenerateGpuProcessToken();
-
-  // Invalidate the previously generated GPU process token.
-  void InvalidateGpuProcessToken();
-
-  // Generate a unique unguessable token that the child process associated
-  // |child_process_id| can use to acquire IOSurface references.
-  IOSurfaceManagerToken GenerateChildProcessToken(int child_process_id);
-
-  // Invalidate a previously generated child process token.
-  void InvalidateChildProcessToken(const IOSurfaceManagerToken& token);
-
- private:
-  friend class BrowserIOSurfaceManagerTest;
-  friend struct base::DefaultSingletonTraits<BrowserIOSurfaceManager>;
-
-  BrowserIOSurfaceManager();
-  ~BrowserIOSurfaceManager() override;
-
-  // Performs any initialization work.
-  bool Initialize();
-
-  // Message handler that is invoked on |dispatch_source_| when an
-  // incoming message needs to be received.
-  void HandleRequest();
-
-  // Message handlers that are invoked from HandleRequest.
-  void HandleRegisterIOSurfaceRequest(
-      const IOSurfaceManagerHostMsg_RegisterIOSurface& request,
-      IOSurfaceManagerMsg_RegisterIOSurfaceReply* reply);
-  bool HandleUnregisterIOSurfaceRequest(
-      const IOSurfaceManagerHostMsg_UnregisterIOSurface& request);
-  void HandleAcquireIOSurfaceRequest(
-      const IOSurfaceManagerHostMsg_AcquireIOSurface& request,
-      IOSurfaceManagerMsg_AcquireIOSurfaceReply* reply);
-
-  // Whether or not the class has been initialized.
-  bool initialized_;
-
-  // The Mach port on which the server listens.
-  base::mac::ScopedMachReceiveRight server_port_;
-
-  // The dispatch source and queue on which Mach messages will be received.
-  scoped_ptr<base::DispatchSourceMach> dispatch_source_;
-
-  // Stores the IOSurfaces for all GPU clients. The key contains the IOSurface
-  // id and the Child process unique id of the owner.
-  using IOSurfaceMapKey = std::pair<gfx::IOSurfaceId, int>;
-  using IOSurfaceMap =
-      std::map<IOSurfaceMapKey, base::ScopedCFTypeRef<IOSurfaceRef>>;
-  IOSurfaceMap io_surfaces_;
-
-  // Stores the Child process unique id (RenderProcessHost ID) for every
-  // token.
-  using ChildProcessIdMap = std::map<IOSurfaceManagerToken, int>;
-  ChildProcessIdMap child_process_ids_;
-
-  // Stores the GPU process token.
-  IOSurfaceManagerToken gpu_process_token_;
-
-  // Mutex that guards |initialized_|, |io_surfaces_|, |child_process_ids_|
-  // and |gpu_process_token_|.
-  base::Lock lock_;
-
-  DISALLOW_COPY_AND_ASSIGN(BrowserIOSurfaceManager);
-};
-
-}  // namespace content
-
-#endif  // CONTENT_BROWSER_BROWSER_IO_SURFACE_MANAGER_MAC_H_