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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 "content/common/view_messages.h"
#include "ui/gfx/size.h"
namespace content {
class BitmapData : public base::RefCountedThreadSafe<BitmapData> {
public:
BitmapData(base::ProcessHandle process_handle,
base::SharedMemoryHandle memory_handle,
size_t buffer_size)
: process_handle(process_handle),
memory_handle(memory_handle),
buffer_size(buffer_size) {}
base::ProcessHandle process_handle;
base::SharedMemoryHandle memory_handle;
scoped_ptr<base::SharedMemory> memory;
size_t buffer_size;
private:
friend class base::RefCountedThreadSafe<BitmapData>;
~BitmapData() {}
DISALLOW_COPY_AND_ASSIGN(BitmapData);
};
// Holds a reference on the memory to keep it alive.
void FreeSharedMemory(scoped_refptr<BitmapData> data,
cc::SharedBitmap* bitmap) {}
base::LazyInstance<HostSharedBitmapManager> g_shared_memory_manager =
LAZY_INSTANCE_INITIALIZER;
HostSharedBitmapManager::HostSharedBitmapManager() {}
HostSharedBitmapManager::~HostSharedBitmapManager() {}
HostSharedBitmapManager* HostSharedBitmapManager::current() {
return g_shared_memory_manager.Pointer();
}
scoped_ptr<cc::SharedBitmap> HostSharedBitmapManager::AllocateSharedBitmap(
const gfx::Size& size) {
// Bitmaps allocated in host don't need to be shared to other processes, so
// allocate them with new instead.
return scoped_ptr<cc::SharedBitmap>();
}
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::GetSizeInBytes(size, &bitmap_size) ||
bitmap_size > data->buffer_size)
return scoped_ptr<cc::SharedBitmap>();
if (!data->memory->memory()) {
TRACE_EVENT0("renderer_host",
"HostSharedBitmapManager::GetSharedBitmapFromId");
if (!data->memory->Map(data->buffer_size)) {
return scoped_ptr<cc::SharedBitmap>();
}
}
scoped_ptr<cc::SharedBitmap> bitmap(new cc::SharedBitmap(
data->memory.get(), id, base::Bind(&FreeSharedMemory, it->second)));
return bitmap.Pass();
}
scoped_ptr<cc::SharedBitmap> HostSharedBitmapManager::GetBitmapForSharedMemory(
base::SharedMemory*) {
return scoped_ptr<cc::SharedBitmap>();
}
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, handle, buffer_size));
handle_map_[id] = data;
process_map_[process_handle].insert(id);
#if defined(OS_WIN)
data->memory = make_scoped_ptr(
new base::SharedMemory(data->memory_handle, false, data->process_handle));
#else
data->memory =
make_scoped_ptr(new base::SharedMemory(data->memory_handle, false));
#endif
}
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, shared_memory->handle(), buffer_size));
data->memory = shared_memory.Pass();
handle_map_[id] = data;
process_map_[process_handle].insert(id);
if (!data->memory->ShareToProcess(process_handle, shared_memory_handle)) {
LOG(ERROR) << "Cannot share shared memory buffer";
*shared_memory_handle = base::SharedMemory::NULLHandle();
return;
}
}
void HostSharedBitmapManager::ChildDeletedSharedBitmap(
const cc::SharedBitmapId& id) {
base::AutoLock lock(lock_);
BitmapMap::iterator it = handle_map_.find(id);
if (it == handle_map_.end())
return;
base::hash_set<cc::SharedBitmapId>& res =
process_map_[it->second->process_handle];
res.erase(id);
handle_map_.erase(it);
}
void HostSharedBitmapManager::ProcessRemoved(
base::ProcessHandle process_handle) {
base::AutoLock lock(lock_);
ProcessMap::iterator proc_it = process_map_.find(process_handle);
if (proc_it == process_map_.end())
return;
base::hash_set<cc::SharedBitmapId>& res = proc_it->second;
for (base::hash_set<cc::SharedBitmapId>::iterator it = res.begin();
it != res.end();
++it) {
handle_map_.erase(*it);
}
process_map_.erase(proc_it);
}
} // namespace content
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