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/**************************************************************************

 *

 * Copyright 2008 VMware, Inc.

 * All Rights Reserved.

 *

 * 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, sub license, 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 (including the

 * next paragraph) 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 NON-INFRINGEMENT.

 * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS 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.

 *

 **************************************************************************/

/**

 * @file

 * Buffer validation.

 *

 * @author Jose Fonseca 

 */

#include "pipe/p_compiler.h"

#include "pipe/p_defines.h"

#include "util/u_memory.h"

#include "util/u_debug.h"

#include "pb_buffer.h"

#include "pb_validate.h"

#define PB_VALIDATE_INITIAL_SIZE 1 /* 512 */

struct pb_validate_entry

{

   struct pb_buffer *buf;

   unsigned flags;

};

struct pb_validate

{

   struct pb_validate_entry *entries;

   unsigned used;

   unsigned size;

};

enum pipe_error

pb_validate_add_buffer(struct pb_validate *vl,

                       struct pb_buffer *buf,

                       unsigned flags)

{

   assert(buf);

   if(!buf)

      return PIPE_ERROR;

   assert(flags & PB_USAGE_GPU_READ_WRITE);

   assert(!(flags & ~PB_USAGE_GPU_READ_WRITE));

   flags &= PB_USAGE_GPU_READ_WRITE;

   /* We only need to store one reference for each buffer, so avoid storing

    * consecutive references for the same buffer. It might not be the most

    * common pattern, but it is easy to implement.

    */

   if(vl->used && vl->entries[vl->used - 1].buf == buf) {

      vl->entries[vl->used - 1].flags |= flags;

      return PIPE_OK;

   }

   /* Grow the table */

   if(vl->used == vl->size) {

      unsigned new_size;

      struct pb_validate_entry *new_entries;

      new_size = vl->size * 2;

      if(!new_size)

	 return PIPE_ERROR_OUT_OF_MEMORY;

      new_entries = (struct pb_validate_entry *)REALLOC(vl->entries,

                                                        vl->size*sizeof(struct pb_validate_entry),

                                                        new_size*sizeof(struct pb_validate_entry));

      if(!new_entries)

         return PIPE_ERROR_OUT_OF_MEMORY;

      memset(new_entries + vl->size, 0, (new_size - vl->size)*sizeof(struct pb_validate_entry));

      vl->size = new_size;

      vl->entries = new_entries;

   }

   assert(!vl->entries[vl->used].buf);

   pb_reference(&vl->entries[vl->used].buf, buf);

   vl->entries[vl->used].flags = flags;

   ++vl->used;

   return PIPE_OK;

}

enum pipe_error

pb_validate_foreach(struct pb_validate *vl,

                    enum pipe_error (*callback)(struct pb_buffer *buf, void *data),

                    void *data)

{

   unsigned i;

   for(i = 0; i < vl->used; ++i) {

      enum pipe_error ret;

      ret = callback(vl->entries[i].buf, data);

      if(ret != PIPE_OK)

         return ret;

   }

   return PIPE_OK;

}

enum pipe_error

pb_validate_validate(struct pb_validate *vl)

{

   unsigned i;

   for(i = 0; i < vl->used; ++i) {

      enum pipe_error ret;

      ret = pb_validate(vl->entries[i].buf, vl, vl->entries[i].flags);

      if(ret != PIPE_OK) {

         while(i--)

            pb_validate(vl->entries[i].buf, NULL, 0);

         return ret;

      }

   }

   return PIPE_OK;

}

void

pb_validate_fence(struct pb_validate *vl,

                  struct pipe_fence_handle *fence)

{

   unsigned i;

   for(i = 0; i < vl->used; ++i) {

      pb_fence(vl->entries[i].buf, fence);

      pb_reference(&vl->entries[i].buf, NULL);

   }

   vl->used = 0;

}

void

pb_validate_destroy(struct pb_validate *vl)

{

   unsigned i;

   for(i = 0; i < vl->used; ++i)

      pb_reference(&vl->entries[i].buf, NULL);

   FREE(vl->entries);

   FREE(vl);

}

struct pb_validate *

pb_validate_create()

{

   struct pb_validate *vl;

   vl = CALLOC_STRUCT(pb_validate);

   if(!vl)

      return NULL;

   vl->size = PB_VALIDATE_INITIAL_SIZE;

   vl->entries = (struct pb_validate_entry *)CALLOC(vl->size, sizeof(struct pb_validate_entry));

   if(!vl->entries) {

      FREE(vl);

      return NULL;

   }

   return vl;

}