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122 lines
3.8 KiB
C
122 lines
3.8 KiB
C
/* safe-alloc.h: safer memory allocation
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Copyright (C) 2009-2017 Free Software Foundation, Inc.
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This program is free software: you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by the
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Free Software Foundation; either version 3 of the License, or any
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later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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/* Written by Daniel Berrange <berrange@redhat.com>, 2008 */
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#ifndef SAFE_ALLOC_H_
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# define SAFE_ALLOC_H_
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# include <stdlib.h>
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#ifndef __GNUC_PREREQ
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# if defined __GNUC__ && defined __GNUC_MINOR__
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# define __GNUC_PREREQ(maj, min) \
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((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min))
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# else
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# define __GNUC_PREREQ(maj, min) 0
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# endif
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#endif
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# ifndef _GL_ATTRIBUTE_RETURN_CHECK
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# if __GNUC_PREREQ (3, 4)
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# define _GL_ATTRIBUTE_RETURN_CHECK __attribute__((__warn_unused_result__))
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# else
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# define _GL_ATTRIBUTE_RETURN_CHECK
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# endif
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# endif
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/* Don't call these directly - use the macros below */
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int
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safe_alloc_alloc_n (void *ptrptr, size_t size, size_t count, int zeroed)
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_GL_ATTRIBUTE_RETURN_CHECK;
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int
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safe_alloc_realloc_n (void *ptrptr, size_t size, size_t count)
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_GL_ATTRIBUTE_RETURN_CHECK;
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/**
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* ALLOC:
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* @ptr: pointer to hold address of allocated memory
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*
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* Allocate sizeof(*ptr) bytes of memory and store
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* the address of allocated memory in 'ptr'. Fill the
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* newly allocated memory with zeros.
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*
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* Return -1 on failure to allocate, zero on success
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*/
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# define ALLOC(ptr) \
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safe_alloc_alloc_n (&(ptr), sizeof (*(ptr)), 1, 1)
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/**
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* ALLOC_N:
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* @ptr: pointer to hold address of allocated memory
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* @count: number of elements to allocate
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*
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* Allocate an array of 'count' elements, each sizeof(*ptr)
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* bytes long and store the address of allocated memory in
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* 'ptr'. Fill the newly allocated memory with zeros.
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*
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* Return -1 on failure, 0 on success
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*/
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# define ALLOC_N(ptr, count) \
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safe_alloc_alloc_n (&(ptr), sizeof (*(ptr)), (count), 1)
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/**
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* ALLOC_N_UNINITIALIZED:
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* @ptr: pointer to hold address of allocated memory
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* @count: number of elements to allocate
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*
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* Allocate an array of 'count' elements, each sizeof(*ptr)
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* bytes long and store the address of allocated memory in
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* 'ptr'. Do not initialize the new memory at all.
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*
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* Return -1 on failure to allocate, zero on success
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*/
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# define ALLOC_N_UNINITIALIZED(ptr, count) \
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safe_alloc_alloc_n (&(ptr), sizeof (*(ptr)), (count), 0)
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/**
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* REALLOC_N:
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* @ptr: pointer to hold address of allocated memory
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* @count: number of elements to allocate
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*
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* Re-allocate an array of 'count' elements, each sizeof(*ptr)
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* bytes long and store the address of allocated memory in
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* 'ptr'. Fill the newly allocated memory with zeros
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*
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* Return -1 on failure to reallocate, zero on success
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*/
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# define REALLOC_N(ptr, count) \
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safe_alloc_realloc_n (&(ptr), sizeof (*(ptr)), (count))
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/**
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* FREE:
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* @ptr: pointer holding address to be freed
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*
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* Free the memory stored in 'ptr' and update to point
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* to NULL.
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*/
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# define FREE(ptr) \
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do \
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{ \
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free (ptr); \
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(ptr) = NULL; \
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} \
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while (0)
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#endif /* SAFE_ALLOC_H_ */
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