chromium/components/viz/host/host_gpu_memory_buffer_manager.h

// Copyright 2016 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef COMPONENTS_VIZ_HOST_HOST_GPU_MEMORY_BUFFER_MANAGER_H_
#define COMPONENTS_VIZ_HOST_HOST_GPU_MEMORY_BUFFER_MANAGER_H_

#include <memory>
#include <unordered_map>

#include "base/functional/callback_forward.h"
#include "base/gtest_prod_util.h"
#include "base/memory/raw_ptr.h"
#include "base/memory/scoped_refptr.h"
#include "base/memory/unsafe_shared_memory_pool.h"
#include "base/memory/weak_ptr.h"
#include "base/synchronization/waitable_event.h"
#include "base/task/single_thread_task_runner.h"
#include "base/trace_event/memory_dump_provider.h"
#include "components/viz/host/viz_host_export.h"
#include "gpu/command_buffer/client/gpu_memory_buffer_manager.h"
#include "gpu/ipc/common/gpu_memory_buffer_support.h"

namespace gpu {
class GpuMemoryBufferSupport;
}

namespace viz {

namespace mojom {
class GpuService;
}

// This GpuMemoryBufferManager implementation is for [de]allocating GPU memory
// from the GPU process over the mojom.GpuService api. Parts of this class,
// namely methods in gpu::GpuMemoryBufferManager, are usable from any thread but
// this class must be created and destroyed on the UI thread.
//
// Note: `Shutdown()` must be called before the class is destroyed. Shutdown()
// should be called while other threads are still running to cancel any pending
// requests and unblock waiting threads. This class should only be destroyed
// after other threads are stopped to guarantee nothing is using it.
class VIZ_HOST_EXPORT HostGpuMemoryBufferManager
    : public gpu::GpuMemoryBufferManager,
      public base::trace_event::MemoryDumpProvider { … };

}  // namespace viz

#endif  // COMPONENTS_VIZ_HOST_HOST_GPU_MEMORY_BUFFER_MANAGER_H_