mirror of
https://gitlab.isc.org/isc-projects/bind9
synced 2025-08-28 21:17:54 +00:00
dbf5672f32
Previously, the isc_mem_get_aligned() and friends took alignment size as one of the arguments. Replace the specific function with more generic extended variant that now accepts ISC_MEM_ALIGN(alignment) for aligned allocations and ISC_MEM_ZERO for allocations that zeroes the (re-)allocated memory before returning the pointer to the caller.
160 lines
2.8 KiB
C
160 lines
2.8 KiB
C
/*
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* Copyright (C) Internet Systems Consortium, Inc. ("ISC")
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*
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* SPDX-License-Identifier: MPL-2.0
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, you can obtain one at https://mozilla.org/MPL/2.0/.
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*
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* See the COPYRIGHT file distributed with this work for additional
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* information regarding copyright ownership.
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*/
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#pragma once
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#if !defined(HAVE_JEMALLOC)
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#include <stddef.h>
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#include <string.h>
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#include <isc/util.h>
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const char *malloc_conf = NULL;
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#define MALLOCX_ZERO ((int)0x40)
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#if defined(HAVE_MALLOC_SIZE) || defined(HAVE_MALLOC_USABLE_SIZE)
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#include <stdlib.h>
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#ifdef HAVE_MALLOC_SIZE
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#include <malloc/malloc.h>
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static inline size_t
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sallocx(void *ptr, int flags) {
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UNUSED(flags);
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return (malloc_size(ptr));
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}
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#elif HAVE_MALLOC_USABLE_SIZE
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#include <malloc.h>
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static inline size_t
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sallocx(void *ptr, int flags) {
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UNUSED(flags);
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return (malloc_usable_size(ptr));
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}
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#endif /* HAVE_MALLOC_SIZE */
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static inline void *
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mallocx(size_t size, int flags) {
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void *ptr = malloc(size);
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INSIST(ptr != NULL);
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if ((flags & MALLOCX_ZERO) != 0) {
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memset(ptr, 0, size);
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}
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return (ptr);
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}
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static inline void
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sdallocx(void *ptr, size_t size, int flags) {
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UNUSED(size);
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UNUSED(flags);
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free(ptr);
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}
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static inline void *
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rallocx(void *ptr, size_t size, int flags) {
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void *new_ptr;
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size_t old_size;
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REQUIRE(size != 0);
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if ((flags & MALLOCX_ZERO) != 0) {
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old_size = sallocx(ptr, flags);
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}
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new_ptr = realloc(ptr, size);
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INSIST(new_ptr != NULL);
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if ((flags & MALLOCX_ZERO) != 0 && size > old_size) {
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memset((uint8_t *)new_ptr + old_size, 0, size - old_size);
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}
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return (new_ptr);
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}
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#else /* defined(HAVE_MALLOC_SIZE) || defined (HAVE_MALLOC_USABLE_SIZE) */
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#include <stdlib.h>
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typedef union {
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size_t size;
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max_align_t __alignment;
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} size_info;
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static inline void *
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mallocx(size_t size, int flags) {
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void *ptr = NULL;
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size_info *si = malloc(size + sizeof(*si));
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INSIST(si != NULL);
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si->size = size;
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ptr = &si[1];
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if ((flags & MALLOCX_ZERO) != 0) {
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memset(ptr, 0, size);
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}
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return (ptr);
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}
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static inline void
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sdallocx(void *ptr, size_t size, int flags) {
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size_info *si = &(((size_info *)ptr)[-1]);
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UNUSED(size);
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UNUSED(flags);
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free(si);
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}
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static inline size_t
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sallocx(void *ptr, int flags) {
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size_info *si = &(((size_info *)ptr)[-1]);
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UNUSED(flags);
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return (si[0].size);
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}
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static inline void *
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rallocx(void *ptr, size_t size, int flags) {
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size_info *si = realloc(&(((size_info *)ptr)[-1]), size + sizeof(*si));
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INSIST(si != NULL);
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if ((flags & MALLOCX_ZERO) != 0 && size > si->size) {
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memset((uint8_t *)si + sizeof(*si) + si->size, 0,
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size - si->size);
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}
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si->size = size;
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ptr = &si[1];
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return (ptr);
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}
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#endif /* defined(HAVE_MALLOC_SIZE) || defined (HAVE_MALLOC_USABLE_SIZE) */
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#endif /* !defined(HAVE_JEMALLOC) */
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