/*
   (c) Copyright 2001-2009  The world wide DirectFB Open Source Community (directfb.org)
   (c) Copyright 2000-2004  Convergence (integrated media) GmbH

   All rights reserved.

   Written by Denis Oliver Kropp <dok@directfb.org>,
              Andreas Hundt <andi@fischlustig.de>,
              Sven Neumann <neo@directfb.org>,
              Ville Syrjälä <syrjala@sci.fi> and
              Claudio Ciccani <klan@users.sf.net>.

   This library 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 2 of the License, or (at your option) any later version.

   This library 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
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with this library; if not, write to the
   Free Software Foundation, Inc., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA.
*/

#ifndef __FUSION__CALL_H__
#define __FUSION__CALL_H__

#include <fusion/types.h>

typedef enum {
     FCHR_RETURN,
     FCHR_RETAIN
} FusionCallHandlerResult;

typedef FusionCallHandlerResult (*FusionCallHandler) (int           caller,   /* fusion id of the caller */
                                                      int           call_arg, /* optional call parameter */
                                                      void         *call_ptr, /* optional call parameter */
                                                      void         *ctx,      /* optional handler context */
                                                      unsigned int  serial,
                                                      int          *ret_val );

typedef FusionCallHandlerResult (*FusionCallHandler3)(int           caller,   /* fusion id of the caller */
                                                      int           call_arg, /* optional call parameter */
                                                      void         *ptr,      /* optional call parameter */
                                                      unsigned int  length,
                                                      void         *ctx,      /* optional handler context */
                                                      unsigned int  serial,
                                                      void         *ret_ptr,
                                                      unsigned int  ret_size,
                                                      unsigned int *ret_length );

typedef struct {
     FusionWorldShared  *shared;
     int                 call_id;
     FusionID            fusion_id;
     FusionCallHandler   handler;
     FusionCallHandler3  handler3;
     void               *ctx;
} FusionCall;


DirectResult fusion_call_init   ( FusionCall          *call,
                                  FusionCallHandler    handler,
                                  void                *ctx,
                                  const FusionWorld   *world );

DirectResult fusion_call_init3  ( FusionCall          *call,
                                  FusionCallHandler3   handler3,
                                  void                *ctx,
                                  const FusionWorld   *world );

DirectResult fusion_call_execute( FusionCall          *call,
                                  FusionCallExecFlags  flags,
                                  int                  call_arg,
                                  void                *call_ptr,
                                  int                 *ret_val );

DirectResult fusion_call_execute3( FusionCall          *call,
                                   FusionCallExecFlags  flags,
                                   int                  call_arg,
                                   void                *ptr,
                                   unsigned int         length,
                                   void                *ret_ptr,
                                   unsigned int         ret_size,
                                   unsigned int        *ret_length );

DirectResult fusion_call_return ( FusionCall          *call,
                                  unsigned int         serial,
                                  int                  val );

DirectResult fusion_call_return3( FusionCall          *call,
                                  unsigned int         serial,
                                  void                *ptr,
                                  unsigned int         length );

DirectResult fusion_call_destroy( FusionCall          *call );


typedef enum {
     FUSION_CALL_PERMIT_NONE              = 0x00000000,

     FUSION_CALL_PERMIT_EXECUTE           = 0x00000001,

     FUSION_CALL_PERMIT_ALL               = 0x00000001,
} FusionCallPermissions;

/*
 * Give permissions to another fusionee to use the call.
 */
DirectResult fusion_call_add_permissions( FusionCall            *call,
                                          FusionID               fusion_id,
                                          FusionCallPermissions  permissions );


#endif