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/****************************************************************************
* examples/nxflat/tests/longjmp/longjmp.c
*
* Copyright (C) 2009 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <stdio.h>
#include <setjmp.h>
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
#define MAIN_VAL 47
#define FUNC_VAL 92
#define LEAF_VAL 163
#define FUNCTION_ARG MAIN_VAL
#define LEAF_ARG (FUNCTION_ARG + FUNC_VAL)
#define SETJMP_RETURN (LEAF_ARG + LEAF_VAL)
/****************************************************************************
* Private Data
****************************************************************************/
static jmp_buf env;
/****************************************************************************
* Private Functions
****************************************************************************/
static int leaf(int *some_arg)
{
int some_local_variable = *some_arg + LEAF_VAL;
printf("leaf: received %d\n", *some_arg);
if (*some_arg != LEAF_ARG)
printf("leaf: ERROR: expected %d\n", LEAF_ARG);
printf("leaf: Calling longjmp() with %d\n", some_local_variable);
longjmp(env, some_local_variable);
}
static int function(int some_arg)
{
int some_local_variable = some_arg + FUNC_VAL;
int retval;
printf("function: received %d\n", some_arg);
if (some_arg != FUNCTION_ARG)
printf("function: ERROR: expected %d\n", FUNCTION_ARG);
printf("function: Calling leaf() with %d\n", some_local_variable);
retval = leaf(&some_local_variable);
printf("function: ERROR -- leaf returned!\n");
return retval;
}
/****************************************************************************
* Public Functions
****************************************************************************/
int main(int argc, char **argv)
{
int value;
printf("main: Calling setjmp\n");
value = setjmp(env);
printf("main: setjmp returned %d\n", value);
if (value == 0)
{
printf("main: Normal setjmp return\n");
printf("main: Calling function with %d\n", MAIN_VAL);
function(MAIN_VAL);
printf("main: ERROR -- function returned!\n");
return 1;
}
else if (value != SETJMP_RETURN)
{
printf("main: ERROR: Expected %d\n", SETJMP_RETURN);
return 1;
}
else
{
printf("main: SUCCESS: setjmp return from longjmp call\n");
return 0;
}
}
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