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// Copyright (c) 2013 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_COMMON_HOST_SHARED_BITMAP_MANAGER_H_
#define CONTENT_COMMON_HOST_SHARED_BITMAP_MANAGER_H_
#include <map>
#include <set>
#include "base/basictypes.h"
#include "base/containers/hash_tables.h"
#include "base/hash.h"
#include "base/memory/ref_counted.h"
#include "base/memory/scoped_ptr.h"
#include "base/memory/shared_memory.h"
#include "base/synchronization/lock.h"
#include "base/trace_event/memory_dump_provider.h"
#include "cc/resources/shared_bitmap_manager.h"
#include "content/common/content_export.h"
namespace BASE_HASH_NAMESPACE {
template <>
struct hash<cc::SharedBitmapId> {
size_t operator()(const cc::SharedBitmapId& id) const {
return base::Hash(reinterpret_cast<const char*>(id.name), sizeof(id.name));
}
};
} // namespace BASE_HASH_NAMESPACE
namespace content {
class BitmapData;
class HostSharedBitmapManager;
class CONTENT_EXPORT HostSharedBitmapManagerClient {
public:
explicit HostSharedBitmapManagerClient(HostSharedBitmapManager* manager);
~HostSharedBitmapManagerClient();
void AllocateSharedBitmapForChild(
base::ProcessHandle process_handle,
size_t buffer_size,
const cc::SharedBitmapId& id,
base::SharedMemoryHandle* shared_memory_handle);
void ChildAllocatedSharedBitmap(size_t buffer_size,
const base::SharedMemoryHandle& handle,
base::ProcessHandle process_handle,
const cc::SharedBitmapId& id);
void ChildDeletedSharedBitmap(const cc::SharedBitmapId& id);
private:
HostSharedBitmapManager* manager_;
base::hash_set<cc::SharedBitmapId> owned_bitmaps_;
DISALLOW_COPY_AND_ASSIGN(HostSharedBitmapManagerClient);
};
class CONTENT_EXPORT HostSharedBitmapManager
: public cc::SharedBitmapManager,
public base::trace_event::MemoryDumpProvider {
public:
HostSharedBitmapManager();
~HostSharedBitmapManager() override;
static HostSharedBitmapManager* current();
// cc::SharedBitmapManager implementation.
scoped_ptr<cc::SharedBitmap> AllocateSharedBitmap(
const gfx::Size& size) override;
scoped_ptr<cc::SharedBitmap> GetSharedBitmapFromId(
const gfx::Size& size,
const cc::SharedBitmapId&) override;
// base::trace_event::MemoryDumpProvider implementation.
bool OnMemoryDump(const base::trace_event::MemoryDumpArgs& args,
base::trace_event::ProcessMemoryDump* pmd) override;
size_t AllocatedBitmapCount() const;
void FreeSharedMemoryFromMap(const cc::SharedBitmapId& id);
private:
friend class HostSharedBitmapManagerClient;
void AllocateSharedBitmapForChild(
base::ProcessHandle process_handle,
size_t buffer_size,
const cc::SharedBitmapId& id,
base::SharedMemoryHandle* shared_memory_handle);
void ChildAllocatedSharedBitmap(size_t buffer_size,
const base::SharedMemoryHandle& handle,
base::ProcessHandle process_handle,
const cc::SharedBitmapId& id);
void ChildDeletedSharedBitmap(const cc::SharedBitmapId& id);
mutable base::Lock lock_;
typedef base::hash_map<cc::SharedBitmapId, scoped_refptr<BitmapData> >
BitmapMap;
BitmapMap handle_map_;
DISALLOW_COPY_AND_ASSIGN(HostSharedBitmapManager);
};
} // namespace content
#endif // CONTENT_COMMON_HOST_SHARED_BITMAP_MANAGER_H_
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