pjlib/include/pj/compat/setjmp.h

/* $Id$ */
/* 
 * Copyright (C)2003-2007 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_COMPAT_SETJMP_H__
#define __PJ_COMPAT_SETJMP_H__

/**
 * @file setjmp.h
 * @brief Provides setjmp.h functionality.
 */

#if defined(PJ_HAS_SETJMP_H) && PJ_HAS_SETJMP_H != 0
#  include <setjmp.h>
   typedef jmp_buf pj_jmp_buf;
#  ifndef pj_setjmp
#    define pj_setjmp(buf)	setjmp(buf)
#  endif
#  ifndef pj_longjmp
#    define pj_longjmp(buf,d)	longjmp(buf,d)
#  endif

#elif defined(PJ_LINUX_KERNEL) && PJ_LINUX_KERNEL != 0 && \
      defined(PJ_M_I386) && PJ_M_I386 != 0

    /*
     * These are taken from uClibc.
     * Copyright (C) 2000-2003 Erik Andersen <andersen@uclibc.org>
     */
#   if defined __USE_MISC || defined _ASM
#	define JB_BX	0
#	define JB_SI	1
#	define JB_DI	2
#	define JB_BP	3
#	define JB_SP	4
#	define JB_PC	5
#	define JB_SIZE 24
#   endif

# ifndef _ASM
	typedef int __jmp_buf[6];

    /* A `sigset_t' has a bit for each signal.  */
#   define _SIGSET_NWORDS	(1024 / (8 * sizeof (unsigned long int)))
    typedef struct __sigset_t_tag
    {
	unsigned long int __val[_SIGSET_NWORDS];
    } __sigset_t;

    /* Calling environment, plus possibly a saved signal mask.  */
    typedef struct __jmp_buf_tag    /* C++ doesn't like tagless structs.  */
    {
	/* NOTE: The machine-dependent definitions of `__sigsetjmp'
	   assume that a `jmp_buf' begins with a `__jmp_buf' and that
	   `__mask_was_saved' follows it.  Do not move these members
	   or add others before it.  */
	__jmp_buf __jmpbuf;		/* Calling environment.  */
	int __mask_was_saved;		/* Saved the signal mask?  */
	// we never saved the mask.
	__sigset_t __saved_mask;	/* Saved signal mask.  */
    } jmp_buf[1];

    typedef jmp_buf sigjmp_buf;
    typedef jmp_buf pj_jmp_buf;

    PJ_DECL(int) pj_setjmp(pj_jmp_buf env);
    PJ_DECL(void) pj_longjmp(pj_jmp_buf env, int val) __attribute__((noreturn));

# endif   /* _ASM */

#elif defined(PJ_SYMBIAN) && PJ_SYMBIAN!=0
    /* Symbian framework don't use setjmp/longjmp */
    
#else
#  warning "setjmp()/longjmp() is not implemented"
   typedef int pj_jmp_buf[1];
#  define pj_setjmp(buf)	0
#  define pj_longjmp(buf,d)	0
#endif


#endif	/* __PJ_COMPAT_SETJMP_H__ */