/*

 * The internal pool functions

 *

 * Copyright (C) 2009-2022, Joachim Metz <joachim.metz@gmail.com>

 *

 * Refer to AUTHORS for acknowledgements.

 *

 * This program is free software: you can redistribute it and/or modify

 * it under the terms of the GNU Lesser General Public License as published by

 * the Free Software Foundation, either version 3 of the License, or

 * (at your option) any later version.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU Lesser General Public License

 * along with this program.  If not, see <https://www.gnu.org/licenses/>.

 */

#include <common.h>

#include <memory.h>

#include <types.h>

#if defined( HAVE_UNISTD_H )

#include <unistd.h>

#endif

#include "libbfio_definitions.h"

#include "libbfio_handle.h"

#include "libbfio_libcdata.h"

#include "libbfio_libcerror.h"

#include "libbfio_pool.h"

#include "libbfio_types.h"

/* Creates a pool

 * Make sure the value pool is referencing, is set to NULL

 * Returns 1 if successful or -1 on error

 */

int libbfio_pool_initialize(

     libbfio_pool_t **pool,

     int number_of_handles,

     int maximum_number_of_open_handles,

     libcerror_error_t **error )

{

  libbfio_internal_pool_t *internal_pool = NULL;

  static char *function                  = "libbfio_pool_initialize";

  if( pool == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid pool.",

     function );

    return( -1 );

  }

  if( *pool != NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_VALUE_ALREADY_SET,

     "%s: invalid pool value already set.",

     function );

    return( -1 );

  }

  if( number_of_handles < 0 )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_VALUE_LESS_THAN_ZERO,

     "%s: invalid number of handles value less than zero.",

     function );

    return( -1 );

  }

  if( maximum_number_of_open_handles < 0 )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_VALUE_LESS_THAN_ZERO,

     "%s: invalid maximum number of open handles value less than zero.",

     function );

    return( -1 );

  }

  internal_pool = memory_allocate_structure(

                   libbfio_internal_pool_t );

  if( internal_pool == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_MEMORY,

     LIBCERROR_MEMORY_ERROR_INSUFFICIENT,

     "%s: unable to create pool.",

     function );

    goto on_error;

  }

  if( memory_set(

       internal_pool,

       0,

       sizeof( libbfio_internal_pool_t ) ) == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_MEMORY,

     LIBCERROR_MEMORY_ERROR_SET_FAILED,

     "%s: unable to clear pool.",

     function );

    memory_free(

     internal_pool );

    return( -1 );

  }

  if( libcdata_array_initialize(

       &( internal_pool->handles_array ),

       number_of_handles,

       error ) != 1 )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_INITIALIZE_FAILED,

     "%s: unable to create handles array.",

     function );

    goto on_error;

  }

  if( libcdata_list_initialize(

       &( internal_pool->last_used_list ),

       error ) != 1 )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_INITIALIZE_FAILED,

     "%s: unable to create last used list.",

     function );

    goto on_error;

  }

#if defined( HAVE_MULTI_THREAD_SUPPORT ) && !defined( HAVE_LOCAL_LIBBFIO )

  if( libcthreads_read_write_lock_initialize(

       &( internal_pool->read_write_lock ),

       error ) != 1 )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_INITIALIZE_FAILED,

     "%s: unable to initialize read/write lock.",

     function );

    goto on_error;

  }

#endif

  internal_pool->maximum_number_of_open_handles = maximum_number_of_open_handles;

  internal_pool->current_entry                  = -1;

  *pool = (libbfio_pool_t *) internal_pool;

  return( 1 );

on_error:

  if( internal_pool != NULL )

  {

    if( internal_pool->last_used_list != NULL )

    {

      libcdata_list_free(

       &( internal_pool->last_used_list ),

       NULL,

       NULL );

    }

    if( internal_pool->handles_array != NULL )

    {

      libcdata_array_free(

       &( internal_pool->handles_array ),

       (int (*)(intptr_t **, libcerror_error_t **)) &libbfio_handle_free,

       NULL );

    }

    memory_free(

     internal_pool );

  }

  return( -1 );

}

/* Frees a pool

 * Returns 1 if successful or -1 on error

 */

int libbfio_pool_free(

     libbfio_pool_t **pool,

     libcerror_error_t **error )

{

  libbfio_internal_pool_t *internal_pool = NULL;

  static char *function                  = "libbfio_pool_free";

  int result                             = 1;

  if( pool == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid pool.",

     function );

    return( -1 );

  }

  if( *pool != NULL )

  {

    internal_pool = (libbfio_internal_pool_t *) *pool;

    *pool         = NULL;

#if defined( HAVE_MULTI_THREAD_SUPPORT ) && !defined( HAVE_LOCAL_LIBBFIO )

    if( libcthreads_read_write_lock_free(

         &( internal_pool->read_write_lock ),

         error ) != 1 )

    {

      libcerror_error_set(

       error,

       LIBCERROR_ERROR_DOMAIN_RUNTIME,

       LIBCERROR_RUNTIME_ERROR_FINALIZE_FAILED,

       "%s: unable to free read/write lock.",

       function );

      result = -1;

    }

#endif

    if( libcdata_array_free(

         &( internal_pool->handles_array ),

         (int (*)(intptr_t **, libcerror_error_t **)) &libbfio_handle_free,

         error ) != 1 )

    {

      libcerror_error_set(

       error,

       LIBCERROR_ERROR_DOMAIN_RUNTIME,

       LIBCERROR_RUNTIME_ERROR_FINALIZE_FAILED,

       "%s: unable to free handles array.",

       function );

      result = -1;

    }

    if( libcdata_list_free(

         &( internal_pool->last_used_list ),

         NULL,

         error ) != 1 )

    {

      libcerror_error_set(

       error,

       LIBCERROR_ERROR_DOMAIN_RUNTIME,

       LIBCERROR_RUNTIME_ERROR_FINALIZE_FAILED,

       "%s: unable to free last used list.",

       function );

      result = -1;

    }

    memory_free(

     internal_pool );

  }

  return( result );

}

/* Clones (duplicates) the pool

 * The values in the offsets read list are not duplicated

 * Returns 1 if successful or -1 on error

 */

int libbfio_pool_clone(

     libbfio_pool_t **destination_pool,

     libbfio_pool_t *source_pool,

     libcerror_error_t **error )

{

  libbfio_internal_pool_t *internal_destination_pool = NULL;

  libbfio_internal_pool_t *internal_source_pool      = NULL;

  static char *function                              = "libbfio_pool_clone";

  if( destination_pool == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid destination pool.",

     function );

    return( -1 );

  }

  if( *destination_pool != NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_VALUE_ALREADY_SET,

     "%s: destination pool already set.",

     function );

    return( -1 );

  }

  if( source_pool == NULL )

  {

    *destination_pool = NULL;

    return( 1 );

  }

  internal_source_pool = (libbfio_internal_pool_t *) source_pool;

#if defined( HAVE_MULTI_THREAD_SUPPORT ) && !defined( HAVE_LOCAL_LIBBFIO )

  if( libcthreads_read_write_lock_grab_for_read(

       internal_source_pool->read_write_lock,

       error ) != 1 )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_SET_FAILED,

     "%s: unable to grab read/write lock for reading.",

     function );

    return( -1 );

  }

#endif

  internal_destination_pool = memory_allocate_structure(

                               libbfio_internal_pool_t );

  if( internal_destination_pool == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_MEMORY,

     LIBCERROR_MEMORY_ERROR_INSUFFICIENT,

     "%s: unable to create destination pool.",

     function );

    goto on_error;

  }

  if( memory_set(

       internal_destination_pool,

       0,

       sizeof( libbfio_internal_pool_t ) ) == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_MEMORY,

     LIBCERROR_MEMORY_ERROR_SET_FAILED,

     "%s: unable to clear destination pool.",

     function );

    memory_free(

     internal_destination_pool );

    internal_destination_pool = NULL;

    goto on_error;

  }

  internal_destination_pool->current_entry  = -1;

  internal_destination_pool->current_handle = NULL;

  if( libcdata_array_clone(

       &( internal_destination_pool->handles_array ),

       internal_source_pool->handles_array,

       (int (*)(intptr_t **, libcerror_error_t **)) &libbfio_handle_free,

       (int (*)(intptr_t **, intptr_t *, libcerror_error_t **)) &libbfio_handle_clone,

       error ) != 1 )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_INITIALIZE_FAILED,

     "%s: unable to create handles array.",

     function );

    goto on_error;

  }

  if( libcdata_list_initialize(

       &( internal_destination_pool->last_used_list ),

       error ) != 1 )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_INITIALIZE_FAILED,

     "%s: unable to create last used list.",

     function );

    goto on_error;

  }

#if defined( HAVE_MULTI_THREAD_SUPPORT ) && !defined( HAVE_LOCAL_LIBBFIO )

  if( libcthreads_read_write_lock_initialize(

       &( internal_destination_pool->read_write_lock ),

       error ) != 1 )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_INITIALIZE_FAILED,

     "%s: unable to initialize read/write lock.",

     function );

    goto on_error;

  }

#endif

  internal_destination_pool->maximum_number_of_open_handles = internal_source_pool->maximum_number_of_open_handles;

#if defined( HAVE_MULTI_THREAD_SUPPORT ) && !defined( HAVE_LOCAL_LIBBFIO )

  if( libcthreads_read_write_lock_release_for_read(

       internal_source_pool->read_write_lock,

       error ) != 1 )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_SET_FAILED,

     "%s: unable to release read/write lock for reading.",

     function );

    libbfio_pool_free(

     (libbfio_pool_t **) &internal_destination_pool,

     NULL );

    return( -1 );

  }

#endif

  *destination_pool = (libbfio_pool_t *) internal_destination_pool;

  return( 1 );

on_error:

  if( internal_destination_pool != NULL )

  {

#if defined( HAVE_MULTI_THREAD_SUPPORT ) && !defined( HAVE_LOCAL_LIBBFIO )

    if( internal_destination_pool->read_write_lock != NULL )

    {

      libcthreads_read_write_lock_free(

       &( internal_destination_pool->read_write_lock ),

       NULL );

    }

#endif

    if( internal_destination_pool->last_used_list != NULL )

    {

      libcdata_list_free(

       &( internal_destination_pool->last_used_list ),

       NULL,

       NULL );

    }

    if( internal_destination_pool->handles_array != NULL )

    {

      libcdata_array_free(

       &( internal_destination_pool->handles_array ),

       (int (*)(intptr_t **, libcerror_error_t **)) &libbfio_handle_free,

       NULL );

    }

    memory_free(

     internal_destination_pool );

  }

#if defined( HAVE_MULTI_THREAD_SUPPORT ) && !defined( HAVE_LOCAL_LIBBFIO )

  libcthreads_read_write_lock_release_for_read(

   internal_source_pool->read_write_lock,

   NULL );

#endif

  return( -1 );

}

/* Resizes the pool

 * Returns 1 if successful or -1 on error

 */

int libbfio_pool_resize(

     libbfio_pool_t *pool,

     int number_of_handles,

     libcerror_error_t **error )

{

  libbfio_internal_pool_t *internal_pool = NULL;

  static char *function                  = "libbfio_pool_resize";

  int result                             = 1;

  if( pool == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid pool.",

     function );

    return( -1 );

  }

  internal_pool = (libbfio_internal_pool_t *) pool;

#if defined( HAVE_MULTI_THREAD_SUPPORT ) && !defined( HAVE_LOCAL_LIBBFIO )

  if( libcthreads_read_write_lock_grab_for_write(

       internal_pool->read_write_lock,

       error ) != 1 )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_SET_FAILED,

     "%s: unable to grab read/write lock for writing.",

     function );

    return( -1 );

  }

#endif

  if( libcdata_array_resize(

       internal_pool->handles_array,

       number_of_handles,

       (int (*)(intptr_t **, libcerror_error_t **)) &libbfio_handle_free,

       error ) != 1 )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_INITIALIZE_FAILED,

     "%s: unable to resize handles array.",

     function );

    result = -1;

  }

#if defined( HAVE_MULTI_THREAD_SUPPORT ) && !defined( HAVE_LOCAL_LIBBFIO )

  if( libcthreads_read_write_lock_release_for_write(

       internal_pool->read_write_lock,

       error ) != 1 )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_SET_FAILED,

     "%s: unable to release read/write lock for writing.",

     function );

    return( -1 );

  }

#endif

  return( result );

}

/* Opens the handle

 * Returns 1 if successful or -1 on error

 */

int libbfio_internal_pool_open_handle(

     libbfio_internal_pool_t *internal_pool,

     libbfio_handle_t *handle,

     int access_flags,

     libcerror_error_t **error )

{

  libbfio_internal_handle_t *internal_handle = NULL;

  static char *function                      = "libbfio_internal_pool_open_handle";

  int is_open                                = 0;

  if( internal_pool == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid pool.",

     function );

    return( -1 );

  }

  if( internal_pool->last_used_list == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_VALUE_MISSING,

     "%s: invalid pool - missing last used list.",

     function );

    return( -1 );

  }

  if( handle == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid handle.",

     function );

    return( -1 );

  }

  is_open = libbfio_handle_is_open(

             handle,

             error );

  if( is_open == -1 )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_GET_FAILED,

     "%s: unable to determine if handle is open.",

     function );

    return( -1 );

  }

  else if( is_open == 1 )

  {

    return( 1 );

  }

  if( internal_pool->maximum_number_of_open_handles != LIBBFIO_POOL_UNLIMITED_NUMBER_OF_OPEN_HANDLES )

  {

    if( libbfio_internal_pool_append_handle_to_last_used_list(

         internal_pool,

         handle,

         error ) != 1 )

    {

      libcerror_error_set(

       error,

       LIBCERROR_ERROR_DOMAIN_RUNTIME,

       LIBCERROR_RUNTIME_ERROR_APPEND_FAILED,

       "%s: unable to append handle to last used list.",

       function );

      return( -1 );

    }

  }

  if( libbfio_handle_open(

       handle,

       access_flags,

       error ) != 1 )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_IO,

     LIBCERROR_IO_ERROR_OPEN_FAILED,

     "%s: unable to open handle.",

     function );

    return( -1 );

  }

  internal_handle = (libbfio_internal_handle_t *) handle;

  if( libbfio_handle_seek_offset(

       handle,

       internal_handle->current_offset,

       SEEK_SET,

       error ) == -1 )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_IO,

     LIBCERROR_IO_ERROR_SEEK_FAILED,

     "%s: unable to seek offset.",

     function );

    return( -1 );

  }

  return( 1 );

}

/* Appends the handle to the last used list

 * Closes the less frequently used handle if necessary

 * Returns 1 if successful or -1 on error

 */

int libbfio_internal_pool_append_handle_to_last_used_list(

     libbfio_internal_pool_t *internal_pool,

     const libbfio_handle_t *handle,

     libcerror_error_t **error )

{

  libbfio_internal_handle_t *internal_handle           = NULL;

  libcdata_list_element_t *last_used_list_element      = NULL;

  libcdata_list_element_t *safe_last_used_list_element = NULL;

  static char *function                                = "libbfio_internal_pool_append_handle_to_last_used_list";

  if( internal_pool == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid pool.",

     function );

    return( -1 );

  }

  if( internal_pool->last_used_list == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_VALUE_MISSING,

     "%s: invalid pool - missing last used list.",

     function );

    return( -1 );

  }

  if( handle == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid handle.",

     function );

    return( -1 );

  }

  /* Check if there is room in the pool for another open handle

   */

  if( ( internal_pool->maximum_number_of_open_handles != LIBBFIO_POOL_UNLIMITED_NUMBER_OF_OPEN_HANDLES )

   && ( ( internal_pool->number_of_open_handles + 1 ) >= internal_pool->maximum_number_of_open_handles ) )

  {

    if( libcdata_list_get_last_element(

         internal_pool->last_used_list,

         &last_used_list_element,

         error ) != 1 )

    {

      libcerror_error_set(

       error,

       LIBCERROR_ERROR_DOMAIN_RUNTIME,

       LIBCERROR_RUNTIME_ERROR_GET_FAILED,

       "%s: unable to retrieve last list element from last used list.",

       function );

      goto on_error;

    }

  }

  if( last_used_list_element == NULL )

  {

    if( libcdata_list_element_initialize(

         &safe_last_used_list_element,

         error ) != 1 )

    {

      libcerror_error_set(

       error,

       LIBCERROR_ERROR_DOMAIN_RUNTIME,

       LIBCERROR_RUNTIME_ERROR_INITIALIZE_FAILED,

       "%s: unable to create last used list element.",

       function );

      goto on_error;

    }

    internal_pool->number_of_open_handles++;

    last_used_list_element = safe_last_used_list_element;

  }

  else

  {

    /* The last used list element is reused to contain the new last used entry

     */

    if( libcdata_list_element_get_value(

         last_used_list_element,

         (intptr_t **) &internal_handle,

         error ) != 1 )

    {

      libcerror_error_set(

       error,

       LIBCERROR_ERROR_DOMAIN_RUNTIME,

       LIBCERROR_RUNTIME_ERROR_GET_FAILED,

       "%s: unable to retrieve value from last used list element.",

       function );

      goto on_error;

    }

    if( libcdata_list_remove_element(

         internal_pool->last_used_list,

         last_used_list_element,

         error ) != 1 )

    {

      libcerror_error_set(

       error,

       LIBCERROR_ERROR_DOMAIN_RUNTIME,

       LIBCERROR_RUNTIME_ERROR_REMOVE_FAILED,

       "%s: unable to remove last list element from last used list.",

       function );

      goto on_error;

    }

    safe_last_used_list_element = last_used_list_element;

    internal_handle->pool_last_used_list_element = NULL;

    if( internal_handle != NULL )

    {

      if( libbfio_handle_close(

           (libbfio_handle_t *) internal_handle,

           error ) != 0 )

      {

        libcerror_error_set(

         error,

         LIBCERROR_ERROR_DOMAIN_IO,

         LIBCERROR_IO_ERROR_CLOSE_FAILED,

         "%s: unable to close handle.",

         function );

        goto on_error;

      }

      /* Make sure the truncate flag is removed from the handle

       */

      internal_handle->access_flags &= ~( LIBBFIO_ACCESS_FLAG_TRUNCATE );

    }

  }

  internal_handle = (libbfio_internal_handle_t *) handle;

  if( libcdata_list_element_set_value(

       last_used_list_element,

       (intptr_t *) handle,

       error ) != 1 )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_SET_FAILED,

     "%s: unable to set value in last used list element.",

     function );

    goto on_error;

  }

  if( libcdata_list_prepend_element(

       internal_pool->last_used_list,

       last_used_list_element,

       error ) != 1 )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_APPEND_FAILED,

     "%s: unable to prepend last used list element to list.",

     function );

    goto on_error;

  }

  internal_handle->pool_last_used_list_element = last_used_list_element;

  return( 1 );

on_error:

  if( safe_last_used_list_element != NULL )

  {

    libcdata_list_element_free(

     &safe_last_used_list_element,

     NULL,

     NULL );

  }

  return( -1 );

}

/* Moves the handle to the front of the last used list

 * Returns 1 if successful or -1 on error

 */

int libbfio_internal_pool_move_handle_to_front_of_last_used_list(

     libbfio_internal_pool_t *internal_pool,

     libbfio_handle_t *handle,

     libcerror_error_t **error )

{

  libbfio_internal_handle_t *internal_handle      = NULL;

  libcdata_list_element_t *first_list_element     = NULL;

  libcdata_list_element_t *last_used_list_element = NULL;

  static char *function                           = "libbfio_internal_pool_move_handle_to_front_of_last_used_list";

  if( internal_pool == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid pool.",

     function );

    return( -1 );

  }

  if( internal_pool->last_used_list == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_VALUE_MISSING,

     "%s: invalid pool - missing last used list.",

     function );

    return( -1 );

  }

  if( handle == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid handle.",

     function );

    return( -1 );

  }

  internal_handle = (libbfio_internal_handle_t *) handle;

  if( libcdata_list_get_first_element(

       internal_pool->last_used_list,

       &first_list_element,

       error ) != 1 )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_GET_FAILED,

     "%s: unable to retrieve first list element from last used list.",

     function );

    goto on_error;

  }

  if( internal_handle->pool_last_used_list_element == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_VALUE_MISSING,

     "%s: missing last used list element.",

     function );