os/ossrv/genericopenlibs/cppstdlib/test/runtime/src/new_handler_test.cpp
author sl
Tue, 10 Jun 2014 14:32:02 +0200
changeset 1 260cb5ec6c19
permissions -rw-r--r--
Update contrib.
sl@0
     1
// Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies).
sl@0
     2
// All rights reserved.
sl@0
     3
// This component and the accompanying materials are made available
sl@0
     4
// under the terms of "Eclipse Public License v1.0"
sl@0
     5
// which accompanies this distribution, and is available
sl@0
     6
// at the URL "http://www.eclipse.org/legal/epl-v10.html".
sl@0
     7
//
sl@0
     8
// Initial Contributors:
sl@0
     9
// Nokia Corporation - initial contribution.
sl@0
    10
//
sl@0
    11
// Contributors:
sl@0
    12
//
sl@0
    13
// Description:
sl@0
    14
// Name        : new_handler_test.cpp
sl@0
    15
// Part of     : standard c++ tests.
sl@0
    16
// 
sl@0
    17
//
sl@0
    18
sl@0
    19
#include <new>
sl@0
    20
#include "test_decls.h"
sl@0
    21
sl@0
    22
int one_huge_chunk = 0xa000;
sl@0
    23
int *last_huge_chunk=NULL;
sl@0
    24
sl@0
    25
int glob_val = 0;
sl@0
    26
void foo()
sl@0
    27
{
sl@0
    28
	/*
sl@0
    29
	 * This is the new handler and it frees the last successful alloc so
sl@0
    30
	 * that the allocation in operator new has some free memory.
sl@0
    31
	 */
sl@0
    32
	glob_val++;
sl@0
    33
	delete [] last_huge_chunk;
sl@0
    34
sl@0
    35
}
sl@0
    36
sl@0
    37
void bar()
sl@0
    38
{
sl@0
    39
	last_huge_chunk	= new int[one_huge_chunk];
sl@0
    40
}
sl@0
    41
sl@0
    42
int main()
sl@0
    43
{
sl@0
    44
	std::new_handler h_old, h_new;
sl@0
    45
sl@0
    46
	try{
sl@0
    47
		while(1){
sl@0
    48
			// Keep allocating until we reach OOM condition. At OOM
sl@0
    49
			// the default new handler throws std::bad_alloc
sl@0
    50
			bar();
sl@0
    51
		}
sl@0
    52
	}catch(std::bad_alloc ba)
sl@0
    53
		{
sl@0
    54
		}
sl@0
    55
	
sl@0
    56
	/*
sl@0
    57
	 * Once the handler is set, failure of 'new' will call the handler to
sl@0
    58
	 * get some free memory... 
sl@0
    59
	 */
sl@0
    60
	h_new = (std::new_handler)&foo;
sl@0
    61
sl@0
    62
	h_old = std::set_new_handler(h_new);
sl@0
    63
sl@0
    64
	try {
sl@0
    65
	/*
sl@0
    66
	 * Try once more to see if our handler actually freed up  some memory
sl@0
    67
	 */
sl@0
    68
		bar();
sl@0
    69
	}catch(...){
sl@0
    70
		glob_val = 0;
sl@0
    71
	}
sl@0
    72
	
sl@0
    73
	CPP_TESTS_ASSERT_ALLWAYS(glob_val != 0);
sl@0
    74
sl@0
    75
	h_new = std::set_new_handler(h_old);
sl@0
    76
	return 0;
sl@0
    77
}