content/child/child_io_surface_manager_mac.h

   1 // Copyright 2015 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CONTENT_CHILD_CHILD_IO_SURFACE_MANAGER_MAC_H_
   6 #define CONTENT_CHILD_CHILD_IO_SURFACE_MANAGER_MAC_H_
   7
   8 #include "base/mac/scoped_mach_port.h"
   9 #include "base/macros.h"
  10 #include "base/memory/singleton.h"
  11 #include "base/synchronization/waitable_event.h"
  12 #include "base/threading/platform_thread.h"
  13 #include "content/common/mac/io_surface_manager.h"
  14 #include "content/common/mac/io_surface_manager_token.h"
  15
  16 namespace content {
  17
  18 // Implementation of IOSurfaceManager that registers and acquires IOSurfaces
  19 // through a Mach service.
  20 class CONTENT_EXPORT ChildIOSurfaceManager : public IOSurfaceManager {
  21  public:
  22   // Returns the global ChildIOSurfaceManager.
  23   static ChildIOSurfaceManager* GetInstance();
  24
  25   // Overridden from IOSurfaceManager:
  26   bool RegisterIOSurface(int io_surface_id,
  27                          int client_id,
  28                          IOSurfaceRef io_surface) override;
  29   void UnregisterIOSurface(int io_surface_id, int client_id) override;
  30   IOSurfaceRef AcquireIOSurface(int io_surface_id) override;
  31
  32   // Set the service Mach port. Ownership of |service_port| is passed to the
  33   // manager.
  34   void set_service_port(mach_port_t service_port) {
  35     service_port_.reset(service_port);
  36   }
  37
  38   // Set the token used when communicating with the Mach service.
  39   void set_token(const IOSurfaceManagerToken& token) {
  40     token_ = token;
  41 #if !defined(NDEBUG)
  42     set_token_thread_id_ = base::PlatformThread::CurrentRef();
  43 #endif
  44     set_token_event_.Signal();
  45   }
  46
  47  private:
  48   friend struct DefaultSingletonTraits<ChildIOSurfaceManager>;
  49
  50   ChildIOSurfaceManager();
  51   ~ChildIOSurfaceManager() override;
  52
  53   base::mac::ScopedMachSendRight service_port_;
  54   IOSurfaceManagerToken token_;
  55 #if !defined(NDEBUG)
  56   base::PlatformThreadRef set_token_thread_id_;
  57 #endif
  58   base::WaitableEvent set_token_event_;
  59
  60   DISALLOW_COPY_AND_ASSIGN(ChildIOSurfaceManager);
  61 };
  62
  63 }  // namespace content
  64
  65 #endif  // CONTENT_CHILD_CHILD_IO_SURFACE_MANAGER_MAC_H_