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// Copyright 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.
#include "content/common/host_shared_bitmap_manager.h"
#include "base/lazy_instance.h"
#include "base/memory/ref_counted.h"
#include "base/strings/string_number_conversions.h"
#include "base/trace_event/process_memory_dump.h"
#include "content/common/view_messages.h"
#include "ui/gfx/geometry/size.h"
namespace content {
class BitmapData : public base::RefCountedThreadSafe<BitmapData> {
public:
BitmapData(base::ProcessHandle process_handle,
size_t buffer_size)
: process_handle(process_handle),
buffer_size(buffer_size) {}
base::ProcessHandle process_handle;
scoped_ptr<base::SharedMemory> memory;
scoped_ptr<uint8[]> pixels;
size_t buffer_size;
private:
friend class base::RefCountedThreadSafe<BitmapData>;
~BitmapData() {}
DISALLOW_COPY_AND_ASSIGN(BitmapData);
};
namespace {
class HostSharedBitmap : public cc::SharedBitmap {
public:
HostSharedBitmap(uint8* pixels,
scoped_refptr<BitmapData> bitmap_data,
const cc::SharedBitmapId& id,
HostSharedBitmapManager* manager)
: SharedBitmap(pixels, id),
bitmap_data_(bitmap_data),
manager_(manager) {}
~HostSharedBitmap() override {
if (manager_)
manager_->FreeSharedMemoryFromMap(id());
}
private:
scoped_refptr<BitmapData> bitmap_data_;
HostSharedBitmapManager* manager_;
};
const char kMemoryAllocatorName[] = "sharedbitmap";
} // namespace
base::LazyInstance<HostSharedBitmapManager> g_shared_memory_manager =
LAZY_INSTANCE_INITIALIZER;
HostSharedBitmapManagerClient::HostSharedBitmapManagerClient(
HostSharedBitmapManager* manager)
: manager_(manager) {
}
HostSharedBitmapManagerClient::~HostSharedBitmapManagerClient() {
for (const auto& id : owned_bitmaps_)
manager_->ChildDeletedSharedBitmap(id);
}
void HostSharedBitmapManagerClient::AllocateSharedBitmapForChild(
base::ProcessHandle process_handle,
size_t buffer_size,
const cc::SharedBitmapId& id,
base::SharedMemoryHandle* shared_memory_handle) {
manager_->AllocateSharedBitmapForChild(process_handle, buffer_size, id,
shared_memory_handle);
owned_bitmaps_.insert(id);
}
void HostSharedBitmapManagerClient::ChildAllocatedSharedBitmap(
size_t buffer_size,
const base::SharedMemoryHandle& handle,
base::ProcessHandle process_handle,
const cc::SharedBitmapId& id) {
manager_->ChildAllocatedSharedBitmap(buffer_size, handle, process_handle, id);
owned_bitmaps_.insert(id);
}
void HostSharedBitmapManagerClient::ChildDeletedSharedBitmap(
const cc::SharedBitmapId& id) {
manager_->ChildDeletedSharedBitmap(id);
owned_bitmaps_.erase(id);
}
HostSharedBitmapManager::HostSharedBitmapManager() {}
HostSharedBitmapManager::~HostSharedBitmapManager() {
DCHECK(handle_map_.empty());
}
HostSharedBitmapManager* HostSharedBitmapManager::current() {
return g_shared_memory_manager.Pointer();
}
scoped_ptr<cc::SharedBitmap> HostSharedBitmapManager::AllocateSharedBitmap(
const gfx::Size& size) {
base::AutoLock lock(lock_);
size_t bitmap_size;
if (!cc::SharedBitmap::SizeInBytes(size, &bitmap_size))
return scoped_ptr<cc::SharedBitmap>();
scoped_refptr<BitmapData> data(
new BitmapData(base::GetCurrentProcessHandle(),
bitmap_size));
// Bitmaps allocated in host don't need to be shared to other processes, so
// allocate them with new instead.
data->pixels = scoped_ptr<uint8[]>(new uint8[bitmap_size]);
cc::SharedBitmapId id = cc::SharedBitmap::GenerateId();
handle_map_[id] = data;
return make_scoped_ptr(
new HostSharedBitmap(data->pixels.get(), data, id, this));
}
scoped_ptr<cc::SharedBitmap> HostSharedBitmapManager::GetSharedBitmapFromId(
const gfx::Size& size,
const cc::SharedBitmapId& id) {
base::AutoLock lock(lock_);
BitmapMap::iterator it = handle_map_.find(id);
if (it == handle_map_.end())
return scoped_ptr<cc::SharedBitmap>();
BitmapData* data = it->second.get();
size_t bitmap_size;
if (!cc::SharedBitmap::SizeInBytes(size, &bitmap_size) ||
bitmap_size > data->buffer_size)
return scoped_ptr<cc::SharedBitmap>();
if (data->pixels) {
return make_scoped_ptr(
new HostSharedBitmap(data->pixels.get(), data, id, nullptr));
}
if (!data->memory->memory()) {
return scoped_ptr<cc::SharedBitmap>();
}
return make_scoped_ptr(new HostSharedBitmap(
static_cast<uint8*>(data->memory->memory()), data, id, nullptr));
}
bool HostSharedBitmapManager::OnMemoryDump(
base::trace_event::ProcessMemoryDump* pmd) {
base::AutoLock lock(lock_);
for (const auto& bitmap : handle_map_) {
base::trace_event::MemoryAllocatorDump* dump = pmd->CreateAllocatorDump(
base::StringPrintf("%s/%s", kMemoryAllocatorName,
base::HexEncode(bitmap.first.name,
sizeof(bitmap.first.name)).c_str()));
if (!dump)
return false;
dump->AddScalar(base::trace_event::MemoryAllocatorDump::kNameOuterSize,
base::trace_event::MemoryAllocatorDump::kUnitsBytes,
bitmap.second->buffer_size);
}
return true;
}
void HostSharedBitmapManager::ChildAllocatedSharedBitmap(
size_t buffer_size,
const base::SharedMemoryHandle& handle,
base::ProcessHandle process_handle,
const cc::SharedBitmapId& id) {
base::AutoLock lock(lock_);
if (handle_map_.find(id) != handle_map_.end())
return;
scoped_refptr<BitmapData> data(
new BitmapData(process_handle, buffer_size));
handle_map_[id] = data;
#if defined(OS_WIN)
data->memory = make_scoped_ptr(
new base::SharedMemory(handle, false, data->process_handle));
#else
data->memory =
make_scoped_ptr(new base::SharedMemory(handle, false));
#endif
data->memory->Map(data->buffer_size);
data->memory->Close();
}
void HostSharedBitmapManager::AllocateSharedBitmapForChild(
base::ProcessHandle process_handle,
size_t buffer_size,
const cc::SharedBitmapId& id,
base::SharedMemoryHandle* shared_memory_handle) {
base::AutoLock lock(lock_);
if (handle_map_.find(id) != handle_map_.end()) {
*shared_memory_handle = base::SharedMemory::NULLHandle();
return;
}
scoped_ptr<base::SharedMemory> shared_memory(new base::SharedMemory);
if (!shared_memory->CreateAndMapAnonymous(buffer_size)) {
LOG(ERROR) << "Cannot create shared memory buffer";
*shared_memory_handle = base::SharedMemory::NULLHandle();
return;
}
scoped_refptr<BitmapData> data(
new BitmapData(process_handle, buffer_size));
data->memory = shared_memory.Pass();
handle_map_[id] = data;
if (!data->memory->ShareToProcess(process_handle, shared_memory_handle)) {
LOG(ERROR) << "Cannot share shared memory buffer";
*shared_memory_handle = base::SharedMemory::NULLHandle();
return;
}
data->memory->Close();
}
void HostSharedBitmapManager::ChildDeletedSharedBitmap(
const cc::SharedBitmapId& id) {
base::AutoLock lock(lock_);
handle_map_.erase(id);
}
size_t HostSharedBitmapManager::AllocatedBitmapCount() const {
base::AutoLock lock(lock_);
return handle_map_.size();
}
void HostSharedBitmapManager::FreeSharedMemoryFromMap(
const cc::SharedBitmapId& id) {
base::AutoLock lock(lock_);
handle_map_.erase(id);
}
} // namespace content
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