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/* -*- Mode: C; c-basic-offset: 4; indent-tabs-mode: nil -*- */
/*
Copyright (C) 2010 Red Hat, Inc.
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, see <http://www.gnu.org/licenses/>.
*/
#ifndef _H_MEM
#define _H_MEM
#include <stdlib.h>
#include <spice/macros.h>
char *spice_strdup(const char *str) SPICE_GNUC_MALLOC;
char *spice_strndup(const char *str, size_t n_bytes) SPICE_GNUC_MALLOC;
void *spice_memdup(const void *mem, size_t n_bytes) SPICE_GNUC_MALLOC;
void *spice_malloc(size_t n_bytes) SPICE_GNUC_MALLOC SPICE_GNUC_ALLOC_SIZE(1);
void *spice_malloc0(size_t n_bytes) SPICE_GNUC_MALLOC SPICE_GNUC_ALLOC_SIZE(1);
void *spice_realloc(void *mem, size_t n_bytes) SPICE_GNUC_WARN_UNUSED_RESULT;
void *spice_malloc_n(size_t n_blocks, size_t n_block_bytes) SPICE_GNUC_MALLOC SPICE_GNUC_ALLOC_SIZE2(1,2);
void *spice_malloc_n_m(size_t n_blocks, size_t n_block_bytes, size_t extra_size) SPICE_GNUC_MALLOC;
void *spice_malloc0_n(size_t n_blocks, size_t n_block_bytes) SPICE_GNUC_MALLOC SPICE_GNUC_ALLOC_SIZE2(1,2);
void *spice_realloc_n(void *mem, size_t n_blocks, size_t n_block_bytes) SPICE_GNUC_WARN_UNUSED_RESULT;
/* Optimise: avoid the call to the (slower) _n function if we can
* determine at compile-time that no overflow happens.
*/
#if defined (__GNUC__) && (__GNUC__ >= 2) && defined (__OPTIMIZE__)
# define _SPICE_NEW(struct_type, n_structs, func) \
(struct_type *) (__extension__ ({ \
size_t __n = (size_t) (n_structs); \
size_t __s = sizeof (struct_type); \
void *__p; \
if (__s == 1) \
__p = spice_##func (__n); \
else if (__builtin_constant_p (__n) && \
__n <= SIZE_MAX / __s) \
__p = spice_##func (__n * __s); \
else \
__p = spice_##func##_n (__n, __s); \
__p; \
}))
# define _SPICE_RENEW(struct_type, mem, n_structs, func) \
(struct_type *) (__extension__ ({ \
size_t __n = (size_t) (n_structs); \
size_t __s = sizeof (struct_type); \
void *__p = (void *) (mem); \
if (__s == 1) \
__p = spice_##func (__p, __n); \
else if (__builtin_constant_p (__n) && \
__n <= SIZE_MAX / __s) \
__p = spice_##func (__p, __n * __s); \
else \
__p = spice_##func##_n (__p, __n, __s); \
__p; \
}))
#else
/* Unoptimised version: always call the _n() function. */
#define _SPICE_NEW(struct_type, n_structs, func) \
((struct_type *) spice_##func##_n ((n_structs), sizeof (struct_type)))
#define _SPICE_RENEW(struct_type, mem, n_structs, func) \
((struct_type *) spice_##func##_n (mem, (n_structs), sizeof (struct_type)))
#endif
#define spice_new(struct_type, n_structs) _SPICE_NEW(struct_type, n_structs, malloc)
#define spice_new0(struct_type, n_structs) _SPICE_NEW(struct_type, n_structs, malloc0)
#define spice_renew(struct_type, mem, n_structs) _SPICE_RENEW(struct_type, mem, n_structs, realloc)
#endif
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