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https://gitlab.uni-freiburg.de/opensourcevdi/spice-common
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107 lines
4.7 KiB
C
107 lines
4.7 KiB
C
/* -*- Mode: C; c-basic-offset: 4; indent-tabs-mode: nil -*- */
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/*
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Copyright (C) 2010 Red Hat, Inc.
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library 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 GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef _H_MEM
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#define _H_MEM
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#include <stdlib.h>
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#include <spice/macros.h>
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typedef struct SpiceChunk {
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uint8_t *data;
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uint32_t len;
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} SpiceChunk;
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enum {
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SPICE_CHUNKS_FLAGS_UNSTABLE = (1<<0),
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SPICE_CHUNKS_FLAGS_FREE = (1<<1)
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};
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typedef struct SpiceChunks {
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uint32_t data_size;
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uint32_t num_chunks;
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uint32_t flags;
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SpiceChunk chunk[0];
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} SpiceChunks;
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char *spice_strdup(const char *str) SPICE_GNUC_MALLOC;
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char *spice_strndup(const char *str, size_t n_bytes) SPICE_GNUC_MALLOC;
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void *spice_memdup(const void *mem, size_t n_bytes) SPICE_GNUC_MALLOC;
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void *spice_malloc(size_t n_bytes) SPICE_GNUC_MALLOC SPICE_GNUC_ALLOC_SIZE(1);
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void *spice_malloc0(size_t n_bytes) SPICE_GNUC_MALLOC SPICE_GNUC_ALLOC_SIZE(1);
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void *spice_realloc(void *mem, size_t n_bytes) SPICE_GNUC_WARN_UNUSED_RESULT;
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void *spice_malloc_n(size_t n_blocks, size_t n_block_bytes) SPICE_GNUC_MALLOC SPICE_GNUC_ALLOC_SIZE2(1,2);
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void *spice_malloc_n_m(size_t n_blocks, size_t n_block_bytes, size_t extra_size) SPICE_GNUC_MALLOC;
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void *spice_malloc0_n(size_t n_blocks, size_t n_block_bytes) SPICE_GNUC_MALLOC SPICE_GNUC_ALLOC_SIZE2(1,2);
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void *spice_realloc_n(void *mem, size_t n_blocks, size_t n_block_bytes) SPICE_GNUC_WARN_UNUSED_RESULT;
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SpiceChunks *spice_chunks_new(uint32_t count) SPICE_GNUC_MALLOC;
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SpiceChunks *spice_chunks_new_linear(uint8_t *data, uint32_t len) SPICE_GNUC_MALLOC;
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void spice_chunks_destroy(SpiceChunks *chunks);
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void spice_chunks_linearize(SpiceChunks *chunks);
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size_t spice_strnlen(const char *str, size_t max_len);
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/* Optimize: avoid the call to the (slower) _n function if we can
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* determine at compile-time that no overflow happens.
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*/
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#if defined (__GNUC__) && (__GNUC__ >= 2) && defined (__OPTIMIZE__)
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# define _SPICE_NEW(struct_type, n_structs, func) \
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(struct_type *) (__extension__ ({ \
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size_t __n = (size_t) (n_structs); \
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size_t __s = sizeof (struct_type); \
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void *__p; \
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if (__s == 1) \
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__p = spice_##func (__n); \
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else if (__builtin_constant_p (__n) && \
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__n <= SIZE_MAX / __s) \
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__p = spice_##func (__n * __s); \
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else \
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__p = spice_##func##_n (__n, __s); \
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__p; \
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}))
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# define _SPICE_RENEW(struct_type, mem, n_structs, func) \
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(struct_type *) (__extension__ ({ \
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size_t __n = (size_t) (n_structs); \
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size_t __s = sizeof (struct_type); \
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void *__p = (void *) (mem); \
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if (__s == 1) \
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__p = spice_##func (__p, __n); \
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else if (__builtin_constant_p (__n) && \
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__n <= SIZE_MAX / __s) \
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__p = spice_##func (__p, __n * __s); \
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else \
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__p = spice_##func##_n (__p, __n, __s); \
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__p; \
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}))
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#else
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/* Unoptimized version: always call the _n() function. */
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#define _SPICE_NEW(struct_type, n_structs, func) \
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((struct_type *) spice_##func##_n ((n_structs), sizeof (struct_type)))
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#define _SPICE_RENEW(struct_type, mem, n_structs, func) \
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((struct_type *) spice_##func##_n (mem, (n_structs), sizeof (struct_type)))
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#endif
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#define spice_new(struct_type, n_structs) _SPICE_NEW(struct_type, n_structs, malloc)
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#define spice_new0(struct_type, n_structs) _SPICE_NEW(struct_type, n_structs, malloc0)
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#define spice_renew(struct_type, mem, n_structs) _SPICE_RENEW(struct_type, mem, n_structs, realloc)
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#endif
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