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//===========================================================================
//
// setjmp.c
//
// Tests for ANSI standard setjmp() and longjmp() functions
//
//===========================================================================
// ####ECOSGPLCOPYRIGHTBEGIN####
// -------------------------------------------
// This file is part of eCos, the Embedded Configurable Operating System.
// Copyright (C) 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
//
// eCos 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.
//
// eCos 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 eCos; if not, write to the Free Software Foundation, Inc.,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
//
// As a special exception, if other files instantiate templates or use
// macros or inline functions from this file, or you compile this file
// and link it with other works to produce a work based on this file,
// this file does not by itself cause the resulting work to be covered by
// the GNU General Public License. However the source code for this file
// must still be made available in accordance with section (3) of the GNU
// General Public License v2.
//
// This exception does not invalidate any other reasons why a work based
// on this file might be covered by the GNU General Public License.
// -------------------------------------------
// ####ECOSGPLCOPYRIGHTEND####
//===========================================================================
//#####DESCRIPTIONBEGIN####
//
// Author(s): jlarmour
// Contributors:
// Date: 2000-04-30
// Purpose:
// Description: Contains test code for C library setjmp() and longjmp()
// functions
// The ANSI standard allows setjmp calls to be used ONLY in the
// forms:
// while (setjmp (jumpbuf))
// while (setjmp (jumpbuf) < 42)
// while (!setjmp (jumpbuf))
// setjmp (jumpbuf);
// result = setjmp(jumpbuf);
//
// Or "while" can also be "if" or "switch" or the implicit
// while of "for".
// Usage:
//
//####DESCRIPTIONEND####
//
//===========================================================================
// INCLUDES
#include <pkgconf/system.h>
#include <cyg/infra/testcase.h> // Test infrastructure header
#include <setjmp.h> // Header for what we're testing
// GLOBALS
static jmp_buf jbuf, jbuf2, jbuf3;
// FUNCTIONS
static int
test_fun( void )
{
volatile int i=0; // add something to the stack to confuse things
longjmp( jbuf, 5 );
i+=5;
return i;
} // test_fun();
#ifndef CYGPKG_LIBC_STARTUP
void cyg_user_start(void)
#else
int
main( int argc, char *argv[] )
#endif
{
static int static_i=0; // temporary variable
int j=0; // ditto
volatile int vol_k=0, vol_l=0; // ditto
CYG_TEST_INIT();
CYG_TEST_INFO("Starting tests from testcase " __FILE__ " for C library "
"setjmp()/longjmp() functions");
// Test 1
if ( setjmp(jbuf) == 0 )
{
static_i=1;
longjmp(jbuf, 1);
static_i=2;
} // if
CYG_TEST_PASS_FAIL( static_i==1, "Simple test 1" );
// Test 2
j=2;
if ( !setjmp(jbuf) )
{
static_i=3;
longjmp(jbuf, 1);
static_i=4;
j=3;
} // if
CYG_TEST_PASS_FAIL( (static_i==3) && (j==2), "Simple test 2" );
// Test 3
static_i=0;
switch (setjmp(jbuf))
{
case 0:
static_i++;
if (static_i!=1)
CYG_TEST_FAIL("Test of value passed to longjmp()");
else
longjmp(jbuf, 5);
break;
case 5:
static_i++;
CYG_TEST_PASS_FAIL( (static_i==2),"Test of value passed to longjmp()");
break;
default:
CYG_TEST_FAIL( "Test of value passed to longjmp()");
break;
} // switch
// Test 3
static_i=0;
switch (setjmp(jbuf))
{
case 0:
static_i++;
if (static_i!=1)
CYG_TEST_FAIL("Test of value passed to longjmp() being 0");
else
longjmp(jbuf, 0);
break;
case 1:
static_i++;
CYG_TEST_PASS_FAIL( (static_i==2),
"Test of value passed to longjmp() being 0");
break;
default:
CYG_TEST_FAIL( "Test of value passed to longjmp() being 0");
break;
} // switch
// Test 4
vol_k=0;
static_i=0;
setjmp( jbuf );
static_i++;
setjmp( jbuf2 );
static_i++;
setjmp( jbuf3 );
if (vol_k==0)
{
vol_k++;
longjmp( jbuf2, 1 );
}
else
{
CYG_TEST_PASS_FAIL( (vol_k==1) && (static_i==3), "Multiple setjmp's" );
}
// Test 5
vol_k=3;
if ( (j=setjmp(jbuf)) == 0 )
{
volatile int l; // put something extra on the stack to confuse things
vol_k++;
l=test_fun();
l++;
vol_k=l;
} // if
CYG_TEST_PASS_FAIL( (j==5) && (vol_k==4), "longjmp from a function" );
// Test 6
vol_k=0;
vol_l=setjmp(jbuf);
vol_k += 3;
if (!vol_l)
test_fun();
vol_l=setjmp(jbuf);
vol_k += 7;
if (!vol_l)
test_fun();
CYG_TEST_PASS_FAIL ( (vol_k == 20), "Repeated longjmps from a function" );
// CYG_TEST_NA("Testing is not applicable to this configuration");
CYG_TEST_FINISH("Finished tests from testcase " __FILE__ " for C library "
"setjmp()/longjmp() functions");
} // main()
// EOF setjmp.c
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