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 "content/common/mac/io_surface_manager.h"
  12 #include "content/common/mac/io_surface_manager_token.h"
  13
  14 namespace content {
  15
  16 // Implementation of IOSurfaceManager that registers and acquires IOSurfaces
  17 // through a Mach service.
  18 class CONTENT_EXPORT ChildIOSurfaceManager : public IOSurfaceManager {
  19  public:
  20   // Returns the global ChildIOSurfaceManager.
  21   static ChildIOSurfaceManager* GetInstance();
  22
  23   // Overridden from IOSurfaceManager:
  24   bool RegisterIOSurface(IOSurfaceId io_surface_id,
  25                          int client_id,
  26                          IOSurfaceRef io_surface) override;
  27   void UnregisterIOSurface(IOSurfaceId io_surface_id, int client_id) override;
  28   IOSurfaceRef AcquireIOSurface(IOSurfaceId io_surface_id) override;
  29
  30   // Set the service Mach port. Ownership of |service_port| is passed to the
  31   // manager.
  32   // Note: This can be called on any thread but must happen before the
  33   // thread-safe IOSurfaceManager interface is used. It is the responsibility
  34   // of users of this class to ensure there are no races.
  35   void set_service_port(mach_port_t service_port) {
  36     service_port_.reset(service_port);
  37   }
  38
  39   // Set the token used when communicating with the Mach service.
  40   // Note: This can be called on any thread but must happen before the
  41   // thread-safe IOSurfaceManager interface is used. It is the responsibility
  42   // of users of this class to ensure there are no races.
  43   void set_token(const IOSurfaceManagerToken& token) {
  44     token_ = token;
  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
  56   DISALLOW_COPY_AND_ASSIGN(ChildIOSurfaceManager);
  57 };
  58
  59 }  // namespace content
  60
  61 #endif  // CONTENT_CHILD_CHILD_IO_SURFACE_MANAGER_MAC_H_