content/common/host_shared_bitmap_manager.h

   1 // Copyright (c) 2013 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_COMMON_HOST_SHARED_BITMAP_MANAGER_H_
   6 #define CONTENT_COMMON_HOST_SHARED_BITMAP_MANAGER_H_
   7
   8 #include <map>
   9 #include <set>
  10
  11 #include "base/basictypes.h"
  12 #include "base/containers/hash_tables.h"
  13 #include "base/hash.h"
  14 #include "base/memory/ref_counted.h"
  15 #include "base/memory/scoped_ptr.h"
  16 #include "base/memory/shared_memory.h"
  17 #include "base/synchronization/lock.h"
  18 #include "cc/resources/shared_bitmap_manager.h"
  19 #include "content/common/content_export.h"
  20
  21 namespace BASE_HASH_NAMESPACE {
  22 template <>
  23 struct hash<cc::SharedBitmapId> {
  24   size_t operator()(const cc::SharedBitmapId& id) const {
  25     return base::Hash(reinterpret_cast<const char*>(id.name), sizeof(id.name));
  26   }
  27 };
  28 }  // namespace BASE_HASH_NAMESPACE
  29
  30 namespace content {
  31 class BitmapData;
  32
  33 class CONTENT_EXPORT HostSharedBitmapManager : public cc::SharedBitmapManager {
  34  public:
  35   HostSharedBitmapManager();
  36   ~HostSharedBitmapManager() override;
  37
  38   static HostSharedBitmapManager* current();
  39
  40   // cc::SharedBitmapManager implementation.
  41   scoped_ptr<cc::SharedBitmap> AllocateSharedBitmap(
  42       const gfx::Size& size) override;
  43   scoped_ptr<cc::SharedBitmap> GetSharedBitmapFromId(
  44       const gfx::Size& size,
  45       const cc::SharedBitmapId&) override;
  46   scoped_ptr<cc::SharedBitmap> GetBitmapForSharedMemory(
  47       base::SharedMemory*) override;
  48
  49   void AllocateSharedBitmapForChild(
  50       base::ProcessHandle process_handle,
  51       size_t buffer_size,
  52       const cc::SharedBitmapId& id,
  53       base::SharedMemoryHandle* shared_memory_handle);
  54   void ChildAllocatedSharedBitmap(size_t buffer_size,
  55                                   const base::SharedMemoryHandle& handle,
  56                                   base::ProcessHandle process_handle,
  57                                   const cc::SharedBitmapId& id);
  58   void ChildDeletedSharedBitmap(const cc::SharedBitmapId& id);
  59   void ProcessRemoved(base::ProcessHandle process_handle);
  60
  61   size_t AllocatedBitmapCount() const;
  62
  63  private:
  64   void FreeSharedMemoryFromMap(cc::SharedBitmap* bitmap);
  65
  66   mutable base::Lock lock_;
  67
  68   typedef base::hash_map<cc::SharedBitmapId, scoped_refptr<BitmapData> >
  69       BitmapMap;
  70   BitmapMap handle_map_;
  71
  72   typedef base::hash_map<base::ProcessHandle,
  73                          base::hash_set<cc::SharedBitmapId> > ProcessMap;
  74   ProcessMap process_map_;
  75 };
  76
  77 }  // namespace content
  78
  79 #endif  // CONTENT_COMMON_HOST_SHARED_BITMAP_MANAGER_H_