harbour-core/contrib/hbwin/wapi_alloc.c

/*
 * Low-level Windows object handling functions
 *
 * Copyright 2008 Viktor Szakats (vszakats.net/harbour)
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2, 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 General Public License
 * along with this program; see the file LICENSE.txt.  If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301 USA (or visit https://www.gnu.org/licenses/).
 *
 * As a special exception, the Harbour Project gives permission for
 * additional uses of the text contained in its release of Harbour.
 *
 * The exception is that, if you link the Harbour libraries with other
 * files to produce an executable, this does not by itself cause the
 * resulting executable to be covered by the GNU General Public License.
 * Your use of that executable is in no way restricted on account of
 * linking the Harbour library code into it.
 *
 * This exception does not however invalidate any other reasons why
 * the executable file might be covered by the GNU General Public License.
 *
 * This exception applies only to the code released by the Harbour
 * Project under the name Harbour.  If you copy code from other
 * Harbour Project or Free Software Foundation releases into a copy of
 * Harbour, as the General Public License permits, the exception does
 * not apply to the code that you add in this way.  To avoid misleading
 * anyone as to the status of such modified files, you must delete
 * this exception notice from them.
 *
 * If you write modifications of your own for Harbour, it is your choice
 * whether to permit this exception to apply to your modifications.
 * If you do not wish that, delete this exception notice.
 *
 */

#include "hbwapi.h"

static HB_GARBAGE_FUNC( s_gc_HDC_release )
{
   void ** ph = ( void ** ) Cargo;

   /* Check if pointer is not NULL to avoid multiple freeing */
   if( ph && *ph )
   {
      /* Destroy the object */
      DeleteDC( ( HDC ) *ph );

      /* set pointer to NULL to avoid multiple freeing */
      *ph = NULL;
   }
}

static const HB_GC_FUNCS s_gc_HDC_funcs =
{
   s_gc_HDC_release,
   hb_gcDummyMark
};

void hbwapi_ret_HDC( HDC p )
{
   if( p )
   {
      void ** ph = ( void ** ) hb_gcAllocate( sizeof( HDC * ), &s_gc_HDC_funcs );

      *ph = p;

      hb_retptrGC( ph );
   }
   else
      hb_retptr( NULL );
}

HDC hbwapi_par_HDC( int iParam )
{
   void ** ph = ( void ** ) hb_parptrGC( &s_gc_HDC_funcs, iParam );

   return ph ? ( HDC ) *ph : ( HDC ) hb_parptr( iParam );
}

static HB_GARBAGE_FUNC( s_gc_HPEN_release )
{
   void ** ph = ( void ** ) Cargo;

   /* Check if pointer is not NULL to avoid multiple freeing */
   if( ph && *ph )
   {
      /* Destroy the object */
      DeleteObject( ( HPEN ) *ph );

      /* set pointer to NULL to avoid multiple freeing */
      *ph = NULL;
   }
}

static const HB_GC_FUNCS s_gc_HPEN_funcs =
{
   s_gc_HPEN_release,
   hb_gcDummyMark
};

void hbwapi_ret_HPEN( HPEN p )
{
   if( p )
   {
      void ** ph = ( void ** ) hb_gcAllocate( sizeof( HPEN * ), &s_gc_HPEN_funcs );

      *ph = p;

      hb_retptrGC( ph );
   }
   else
      hb_retptr( NULL );
}

HPEN hbwapi_par_HPEN( int iParam )
{
   void ** ph = ( void ** ) hb_parptrGC( &s_gc_HPEN_funcs, iParam );

   return ph ? ( HPEN ) *ph : NULL;
}

static HB_GARBAGE_FUNC( s_gc_HBRUSH_release )
{
   void ** ph = ( void ** ) Cargo;

   /* Check if pointer is not NULL to avoid multiple freeing */
   if( ph && *ph )
   {
      /* Destroy the object */
      DeleteObject( ( HBRUSH ) *ph );

      /* set pointer to NULL to avoid multiple freeing */
      *ph = NULL;
   }
}

static const HB_GC_FUNCS s_gc_HBRUSH_funcs =
{
   s_gc_HBRUSH_release,
   hb_gcDummyMark
};

void hbwapi_ret_HBRUSH( HBRUSH p )
{
   if( p )
   {
      void ** ph = ( void ** ) hb_gcAllocate( sizeof( HBRUSH * ), &s_gc_HBRUSH_funcs );

      *ph = p;

      hb_retptrGC( ph );
   }
   else
      hb_retptr( NULL );
}

HBRUSH hbwapi_par_HBRUSH( int iParam )
{
   void ** ph = ( void ** ) hb_parptrGC( &s_gc_HBRUSH_funcs, iParam );

   return ph ? ( HBRUSH ) *ph : NULL;
}

static HB_GARBAGE_FUNC( s_gc_HFONT_release )
{
   void ** ph = ( void ** ) Cargo;

   /* Check if pointer is not NULL to avoid multiple freeing */
   if( ph && *ph )
   {
      /* Destroy the object */
      DeleteObject( ( HFONT ) *ph );

      /* set pointer to NULL to avoid multiple freeing */
      *ph = NULL;
   }
}

static const HB_GC_FUNCS s_gc_HFONT_funcs =
{
   s_gc_HFONT_release,
   hb_gcDummyMark
};

void hbwapi_ret_HFONT( HFONT p )
{
   if( p )
   {
      void ** ph = ( void ** ) hb_gcAllocate( sizeof( HFONT * ), &s_gc_HFONT_funcs );

      *ph = p;

      hb_retptrGC( ph );
   }
   else
      hb_retptr( NULL );
}

HFONT hbwapi_par_HFONT( int iParam )
{
   void ** ph = ( void ** ) hb_parptrGC( &s_gc_HFONT_funcs, iParam );

   return ph ? ( HFONT ) *ph : NULL;
}

static HB_GARBAGE_FUNC( s_gc_PDEVMODE_release )
{
   void ** ph = ( void ** ) Cargo;

   /* Check if pointer is not NULL to avoid multiple freeing */
   if( ph && *ph )
   {
      /* Destroy the object */
      hb_xfree( *ph );

      /* set pointer to NULL to avoid multiple freeing */
      *ph = NULL;
   }
}

static const HB_GC_FUNCS s_gc_PDEVMODE_funcs =
{
   s_gc_PDEVMODE_release,
   hb_gcDummyMark
};

void hbwapi_ret_PDEVMODE( PDEVMODE p )
{
   if( p )
   {
      void ** ph = ( void ** ) hb_gcAllocate( sizeof( PDEVMODE * ), &s_gc_PDEVMODE_funcs );

      *ph = p;

      hb_retptrGC( ph );
   }
   else
      hb_retptr( NULL );
}

PDEVMODE hbwapi_par_PDEVMODE( int iParam )
{
   void ** ph = ( void ** ) hb_parptrGC( &s_gc_PDEVMODE_funcs, iParam );

   return ph ? ( PDEVMODE ) *ph : NULL;
}