icinga2/base/memory.cpp

91 lines
2.7 KiB
C++

/******************************************************************************
* Icinga 2 *
* Copyright (C) 2012 Icinga Development Team (http://www.icinga.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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. *
******************************************************************************/
#include "i2-base.h"
using namespace icinga;
/**
* Constructor for the memory class.
*/
Memory::Memory(void)
{
}
/**
* Allocates memory. Throws an exception if no memory is available. Alignment
* guarantees are the same like for malloc().
*
* @param size The size of the requested memory block.
* @returns A new block of memory.
*/
void *Memory::Allocate(size_t size)
{
void *ptr = malloc(size);
if (size != 0 && ptr == NULL)
throw OutOfMemoryException("malloc failed.");
return ptr;
}
/**
* Resizes a block of memory. Throws an exception if no memory is available.
*
* @param ptr The old memory block or NULL.
* @param size The requested new size of the block.
* @returns A pointer to the new memory block.
*/
void *Memory::Reallocate(void *ptr, size_t size)
{
void *new_ptr = realloc(ptr, size);
if (size != 0 && new_ptr == NULL)
throw OutOfMemoryException("realloc failed.");
return new_ptr;
}
/**
* Duplicates a string. Throws an exception if no memory is available.
*
* @param str The string.
* @returns A copy of the string.
*/
char *Memory::StrDup(const char *str)
{
char *new_str = strdup(str);
if (str == NULL)
throw OutOfMemoryException("strdup failed.");
return new_str;
}
/**
* Frees a memory block.
*
* @param ptr The memory block.
*/
void Memory::Free(void *ptr)
{
if (ptr != NULL)
free(ptr);
}