lnav/test/test_auto_mem.cc

/**
 * Copyright (c) 2007-2012, Timothy Stack
 *
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * 
 * * Redistributions of source code must retain the above copyright notice, this
 * list of conditions and the following disclaimer.
 * * 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.
 * * Neither the name of Timothy Stack 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 REGENTS 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 REGENTS 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.
 */

#include "config.h"

#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
#include <unistd.h>

#include "auto_mem.hh"

struct my_data {
    int dummy1;
    int dummy2;
};

int free_count;
void *last_free;

void my_free(void *mem)
{
    free_count += 1;
    last_free = mem;
}

int main(int argc, char *argv[])
{
    int retval = EXIT_SUCCESS;
    auto_mem<struct my_data, my_free> md1, md2;
    struct my_data md1_val, md2_val;
    
    md1 = &md1_val;
    assert(free_count == 0);
    md1 = md2;
    assert(free_count == 1);
    assert(last_free == &md1_val);
    assert(md1 == NULL);

    md1 = &md2_val;
    assert(free_count == 1);
    assert(last_free == &md1_val);
    *md1.out() = &md1_val;
    assert(free_count == 2);
    assert(last_free == &md2_val);
    assert(md1.in() == &md1_val);

    {
	auto_mem<struct my_data, my_free> md_cp(md1);

	assert(md1 == NULL);
	assert(free_count == 2);
	assert(md_cp == &md1_val);
    }

    assert(free_count == 3);
    assert(last_free == &md1_val);
    
    return retval;
}