text: /*
   * Copyright 2017 The Chromium OS 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 CROS_GRALLOC_DRIVER_H
  #define CROS_GRALLOC_DRIVER_H
  
  #include "cros_gralloc_buffer.h"
  
  #include <mutex>
  #include <unordered_map>
  
  class cros_gralloc_driver
  {
        public:
  	cros_gralloc_driver();
  	~cros_gralloc_driver();
  
  	int get_fd() const;
  
  	int32_t init();
  	int32_t init_master();
  	bool is_supported(const struct cros_gralloc_buffer_descriptor *descriptor);
  	int32_t allocate(const struct cros_gralloc_buffer_descriptor *descriptor,
  			 buffer_handle_t *out_handle);
  
  	int32_t retain(buffer_handle_t handle);
  	int32_t release(buffer_handle_t handle);
  
  	int32_t lock(buffer_handle_t handle, int32_t acquire_fence, const struct rectangle *rect,
  		     uint32_t map_flags, uint8_t *addr[DRV_MAX_PLANES]);
  	int32_t unlock(buffer_handle_t handle, int32_t *release_fence);
  
  	int32_t get_backing_store(buffer_handle_t handle, uint64_t *out_store);
  
        private:
  	cros_gralloc_driver(cros_gralloc_driver const &);
  	cros_gralloc_driver operator=(cros_gralloc_driver const &);
  	cros_gralloc_buffer *get_buffer(cros_gralloc_handle_t hnd);
  
  	struct driver *drv_;
  	std::mutex mutex_;
  	std::unordered_map<uint32_t, cros_gralloc_buffer *> buffers_;
  	std::unordered_map<cros_gralloc_handle_t, std::pair<cros_gralloc_buffer *, int32_t>>
  	    handles_;
  };
  
  #endif
  