except.h

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/* $Id: except.h 3553 2011-05-05 06:14:19Z nanang $ */
/* 
 * Copyright (C) 2008-2011 Teluu Inc. (http://www.teluu.com)
 * Copyright (C) 2003-2008 Benny Prijono <benny@prijono.org>
 *
 * 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 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 General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA 
 */
#ifndef __PJ_EXCEPTION_H__
#define __PJ_EXCEPTION_H__

#include <pj/types.h>
#include <pj/compat/setjmp.h>
#include <pj/log.h>


PJ_BEGIN_DECL


PJ_DECL(pj_status_t) pj_exception_id_alloc(const char *name,
                                           pj_exception_id_t *id);

PJ_DECL(pj_status_t) pj_exception_id_free(pj_exception_id_t id);

PJ_DECL(const char*) pj_exception_id_name(pj_exception_id_t id);


#if defined(PJ_EXCEPTION_USE_WIN32_SEH) && PJ_EXCEPTION_USE_WIN32_SEH != 0
/*****************************************************************************
 **
 ** IMPLEMENTATION OF EXCEPTION USING WINDOWS SEH
 **
 ****************************************************************************/
#define WIN32_LEAN_AND_MEAN
#include <windows.h>

PJ_IDECL_NO_RETURN(void)
pj_throw_exception_(pj_exception_id_t id) PJ_ATTR_NORETURN
{
    RaiseException(id,1,0,NULL);
}

#define PJ_USE_EXCEPTION    
#define PJ_TRY              __try
#define PJ_CATCH(id)        __except(GetExceptionCode()==id ? \
                                      EXCEPTION_EXECUTE_HANDLER : \
                                      EXCEPTION_CONTINUE_SEARCH)
#define PJ_CATCH_ANY        __except(EXCEPTION_EXECUTE_HANDLER)
#define PJ_END              
#define PJ_THROW(id)        pj_throw_exception_(id)
#define PJ_GET_EXCEPTION()  GetExceptionCode()


#elif defined(PJ_SYMBIAN) && PJ_SYMBIAN!=0
/*****************************************************************************
 **
 ** IMPLEMENTATION OF EXCEPTION USING SYMBIAN LEAVE/TRAP FRAMEWORK
 **
 ****************************************************************************/

/* To include this file, the source file must be compiled as
 * C++ code!
 */
#ifdef __cplusplus

class TPjException
{
public:
    int code_;
};

#define PJ_USE_EXCEPTION
#define PJ_TRY                  try
//#define PJ_CATCH(id)          
#define PJ_CATCH_ANY            catch (const TPjException & pj_excp_)
#define PJ_END
#define PJ_THROW(x_id)          do { TPjException e; e.code_=x_id; throw e;} \
                                while (0)
#define PJ_GET_EXCEPTION()      pj_excp_.code_

#else

#define PJ_USE_EXCEPTION
#define PJ_TRY                          
#define PJ_CATCH_ANY            if (0)
#define PJ_END
#define PJ_THROW(x_id)          do { PJ_LOG(1,("PJ_THROW"," error code = %d",x_id)); } while (0)
#define PJ_GET_EXCEPTION()      0

#endif  /* __cplusplus */

#else
/*****************************************************************************
 **
 ** IMPLEMENTATION OF EXCEPTION USING GENERIC SETJMP/LONGJMP
 **
 ****************************************************************************/

struct pj_exception_state_t
{
    struct pj_exception_state_t *prev;  
    pj_jmp_buf state;                   
};

PJ_DECL_NO_RETURN(void) 
pj_throw_exception_(pj_exception_id_t id) PJ_ATTR_NORETURN;

PJ_DECL(void) pj_push_exception_handler_(struct pj_exception_state_t *rec);

PJ_DECL(void) pj_pop_exception_handler_(struct pj_exception_state_t *rec);

#define PJ_USE_EXCEPTION    struct pj_exception_state_t pj_x_except__; int pj_x_code__

#define PJ_TRY              if (1) { \
                                pj_push_exception_handler_(&pj_x_except__); \
                                pj_x_code__ = pj_setjmp(pj_x_except__.state); \
                                if (pj_x_code__ == 0)

#define PJ_CATCH(id)        else if (pj_x_code__ == (id))

#define PJ_CATCH_ANY        else

#define PJ_END                  pj_pop_exception_handler_(&pj_x_except__); \
                            } else {}

#define PJ_THROW(exception_id)  pj_throw_exception_(exception_id)

#define PJ_GET_EXCEPTION()      (pj_x_code__)

#endif  /* PJ_EXCEPTION_USE_WIN32_SEH */


PJ_END_DECL



#endif  /* __PJ_EXCEPTION_H__ */