/*
* memory.c: safer memory allocation
*
* Copyright (C) 2008-2016 Daniel P. Berrange
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#ifndef MEMORY_H_
#define MEMORY_H_
#include "internal.h"
/* Don't call these directly - use the macros below */
int mem_alloc_n(void *ptrptr, size_t size, size_t count) ATTRIBUTE_RETURN_CHECK;
int mem_realloc_n(void *ptrptr, size_t size, size_t count) ATTRIBUTE_RETURN_CHECK;
/**
* ALLOC:
* @ptr: pointer to hold address of allocated memory
*
* Allocate sizeof(*ptr) bytes of memory and store
* the address of allocated memory in 'ptr'. Fill the
* newly allocated memory with zeros.
*
* Returns -1 on failure, 0 on success
*/
#define ALLOC(ptr) mem_alloc_n(&(ptr), sizeof(*(ptr)), 1)
/**
* ALLOC_N:
* @ptr: pointer to hold address of allocated memory
* @count: number of elements to allocate
*
* Allocate an array of 'count' elements, each sizeof(*ptr)
* bytes long and store the address of allocated memory in
* 'ptr'. Fill the newly allocated memory with zeros.
*
* Returns -1 on failure, 0 on success
*/
#define ALLOC_N(ptr, count) mem_alloc_n(&(ptr), sizeof(*(ptr)), (count))
/**
* REALLOC_N:
* @ptr: pointer to hold address of allocated memory
* @count: number of elements to allocate
*
* Re-allocate an array of 'count' elements, each sizeof(*ptr)
* bytes long and store the address of allocated memory in
* 'ptr'. Fill the newly allocated memory with zeros
*
* Returns -1 on failure, 0 on success
*/
#define REALLOC_N(ptr, count) mem_realloc_n(&(ptr), sizeof(*(ptr)), (count))
/**
* FREE:
* @ptr: pointer holding address to be freed
*
* Free the memory stored in 'ptr' and update to point
* to NULL.
*/
#define FREE(ptr) \
do { \
free(ptr); \
(ptr) = NULL; \
} while(0)
#endif /* __VIR_MEMORY_H_ */