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//

// Copyright 2012 Francisco Jerez

//

// Permission is hereby granted, free of charge, to any person obtaining a

// copy of this software and associated documentation files (the "Software"),

// to deal in the Software without restriction, including without limitation

// the rights to use, copy, modify, merge, publish, distribute, sublicense,

// and/or sell copies of the Software, and to permit persons to whom the

// Software is furnished to do so, subject to the following conditions:

//

// The above copyright notice and this permission notice shall be included in

// all copies or substantial portions of the Software.

//

// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL

// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR

// OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,

// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR

// OTHER DEALINGS IN THE SOFTWARE.

//

#ifndef CLOVER_CORE_RESOURCE_HPP

#define CLOVER_CORE_RESOURCE_HPP

#include 

#include "core/queue.hpp"

#include "util/algebra.hpp"

#include "pipe/p_state.h"

namespace clover {

   class memory_obj;

   class mapping;

   ///

   /// Class that represents a device-specific instance of some memory

   /// object.

   ///

   class resource {

   public:

      typedef std::array vector;

      virtual ~resource();

      resource(const resource &r) = delete;

      resource &

      operator=(const resource &r) = delete;

      void copy(command_queue &q, const vector &origin, const vector ®ion,

                resource &src_resource, const vector &src_origin);

      void *add_map(command_queue &q, cl_map_flags flags, bool blocking,

                    const vector &origin, const vector ®ion);

      void del_map(void *p);

      unsigned map_count() const;

      const intrusive_ref device;

      memory_obj &obj;

      friend class sub_resource;

      friend class mapping;

      friend class kernel;

   protected:

      resource(clover::device &dev, memory_obj &obj);

      pipe_sampler_view *bind_sampler_view(command_queue &q);

      void unbind_sampler_view(command_queue &q,

                               pipe_sampler_view *st);

      pipe_surface *bind_surface(command_queue &q, bool rw);

      void unbind_surface(command_queue &q, pipe_surface *st);

      pipe_resource *pipe;

      vector offset;

   private:

      std::list maps;

   };

   ///

   /// Resource associated with its own top-level data storage

   /// allocated in some device.

   ///

   class root_resource : public resource {

   public:

      root_resource(clover::device &dev, memory_obj &obj,

                    command_queue &q, const std::string &data);

      root_resource(clover::device &dev, memory_obj &obj, root_resource &r);

      virtual ~root_resource();

   };

   ///

   /// Resource that reuses a portion of some other resource as data

   /// storage.

   ///

   class sub_resource : public resource {

   public:

      sub_resource(resource &r, const vector &offset);

   };

   ///

   /// Class that represents a mapping of some resource into the CPU

   /// memory space.

   ///

   class mapping {

   public:

      mapping(command_queue &q, resource &r, cl_map_flags flags,

              bool blocking, const resource::vector &origin,

              const resource::vector ®ion);

      mapping(mapping &&m);

      ~mapping();

      mapping &

      operator=(mapping m);

      mapping(const mapping &m) = delete;

      template

      operator T *() const {

         return (T *)p;

      }

   private:

      pipe_context *pctx;

      pipe_transfer *pxfer;

      void *p;

   };

}

#endif