From b4fc88dd7618c3561f067a21ad8eff61b31bcd34 Mon Sep 17 00:00:00 2001 From: "jbauman@chromium.org" Date: Thu, 13 Mar 2014 23:59:18 +0000 Subject: Add shared bitmap managers for browser and renderer processes. The shared bitmap managers will allow software tiles to be allocated in shared memory, so delegated rendering could be used with them. BUG=327220 R=danakj@chromium.org, jschuh@chromium.org, piman@chromium.org Review URL: https://codereview.chromium.org/148243013 git-svn-id: svn://svn.chromium.org/chrome/trunk/src@256955 0039d316-1c4b-4281-b951-d872f2087c98 --- content/common/host_shared_bitmap_manager.cc | 168 +++++++++++++++++++++++++++ 1 file changed, 168 insertions(+) create mode 100644 content/common/host_shared_bitmap_manager.cc (limited to 'content/common/host_shared_bitmap_manager.cc') diff --git a/content/common/host_shared_bitmap_manager.cc b/content/common/host_shared_bitmap_manager.cc new file mode 100644 index 0000000..aa0cd81 --- /dev/null +++ b/content/common/host_shared_bitmap_manager.cc @@ -0,0 +1,168 @@ +// 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 { + 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 memory; + size_t buffer_size; + + private: + friend class base::RefCountedThreadSafe; + ~BitmapData() {} + DISALLOW_COPY_AND_ASSIGN(BitmapData); +}; + +// Holds a reference on the memory to keep it alive. +void FreeSharedMemory(scoped_refptr data, + cc::SharedBitmap* bitmap) {} + +base::LazyInstance g_shared_memory_manager = + LAZY_INSTANCE_INITIALIZER; + +HostSharedBitmapManager::HostSharedBitmapManager() {} +HostSharedBitmapManager::~HostSharedBitmapManager() {} + +HostSharedBitmapManager* HostSharedBitmapManager::current() { + return g_shared_memory_manager.Pointer(); +} + +scoped_ptr 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(); +} + +scoped_ptr 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(); + + BitmapData* data = it->second.get(); + + size_t bitmap_size; + if (!cc::SharedBitmap::GetSizeInBytes(size, &bitmap_size) || + bitmap_size > data->buffer_size) + return scoped_ptr(); + + if (!data->memory->memory()) { + TRACE_EVENT0("renderer_host", + "HostSharedBitmapManager::GetSharedBitmapFromId"); + if (!data->memory->Map(data->buffer_size)) { + return scoped_ptr(); + } + } + + scoped_ptr bitmap(new cc::SharedBitmap( + data->memory.get(), id, base::Bind(&FreeSharedMemory, it->second))); + + return bitmap.Pass(); +} + +scoped_ptr HostSharedBitmapManager::GetBitmapForSharedMemory( + base::SharedMemory*) { + return scoped_ptr(); +} + +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 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 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 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& 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& res = proc_it->second; + + for (base::hash_set::iterator it = res.begin(); + it != res.end(); + ++it) { + handle_map_.erase(*it); + } + process_map_.erase(proc_it); +} + +} // namespace content -- cgit v1.1