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// Copyright 2015 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 UI_OZONE_PLATFORM_DRM_GPU_DRM_DEVICE_MANAGER_H_
#define UI_OZONE_PLATFORM_DRM_GPU_DRM_DEVICE_MANAGER_H_
#include <map>
#include <vector>
#include "base/memory/ref_counted.h"
#include "base/memory/scoped_ptr.h"
#include "base/synchronization/lock.h"
#include "base/threading/thread_checker.h"
#include "ui/gfx/native_widget_types.h"
#include "ui/ozone/ozone_export.h"
namespace base {
class FilePath;
struct FileDescriptor;
class SingleThreadTaskRunner;
}
namespace ui {
class DrmDevice;
class DrmDeviceGenerator;
typedef std::vector<scoped_refptr<DrmDevice>> DrmDeviceVector;
// Tracks the mapping between widgets and the DRM devices used to allocate
// buffers for the window represented by the widget.
// Note: All calls are protected by a lock since
// GetDrmDevice(gfx::AcceleratedWidget) may be called on the IO thread.
class OZONE_EXPORT DrmDeviceManager {
public:
DrmDeviceManager(scoped_ptr<DrmDeviceGenerator> drm_device_generator);
~DrmDeviceManager();
// The first device registered is assumed to be the primary device.
bool AddDrmDevice(const base::FilePath& path, const base::FileDescriptor& fd);
void RemoveDrmDevice(const base::FilePath& path);
void InitializeIOTaskRunner(
const scoped_refptr<base::SingleThreadTaskRunner>& task_runner);
// Updates the device associated with |widget|.
void UpdateDrmDevice(gfx::AcceleratedWidget widget,
const scoped_refptr<DrmDevice>& device);
// Removes the device associated with |widget|.
void RemoveDrmDevice(gfx::AcceleratedWidget widget);
// Returns the device associated with |widget|. If there is no association
// returns |primary_device_|.
scoped_refptr<DrmDevice> GetDrmDevice(gfx::AcceleratedWidget widget);
const DrmDeviceVector& GetDrmDevices() const;
private:
// With the exception of GetDrmDevice() all functions must be called on GPU
// main.
base::ThreadChecker thread_checker_;
scoped_ptr<DrmDeviceGenerator> drm_device_generator_;
scoped_refptr<base::SingleThreadTaskRunner> io_task_runner_;
DrmDeviceVector devices_;
std::map<gfx::AcceleratedWidget, scoped_refptr<DrmDevice>> drm_device_map_;
// This device represents the primary graphics device and is used when:
// 1) 'widget == kNullAcceleratedWidget' when the API requesting a buffer has
// no knowledge of the surface/display it belongs to (currently this happens
// for video buffers), or
// 2) in order to allocate buffers for unmatched surfaces (surfaces without a
// display; ie: when in headless mode).
scoped_refptr<DrmDevice> primary_device_;
// This class is accessed from the main thread and the IO thread. This lock
// protects access to the device map.
base::Lock lock_;
DISALLOW_COPY_AND_ASSIGN(DrmDeviceManager);
};
} // namespace ui
#endif // UI_OZONE_PLATFORM_DRM_GPU_DRM_DEVICE_MANAGER_H_
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