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85 lines
2.7 KiB
85 lines
2.7 KiB
5 months ago
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/* Copyright (c) 2000, 2019, Oracle and/or its affiliates. All rights reserved.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License, version 2.0,
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as published by the Free Software Foundation.
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This program is also distributed with certain software (including
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but not limited to OpenSSL) that is licensed under separate terms,
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as designated in a particular file or component or in included license
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documentation. The authors of MySQL hereby grant you an additional
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permission to link the program and your derivative works with the
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separately licensed software that they have included with MySQL.
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Without limiting anything contained in the foregoing, this file,
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which is part of C Driver for MySQL (Connector/C), is also subject to the
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Universal FOSS Exception, version 1.0, a copy of which can be found at
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http://oss.oracle.com/licenses/universal-foss-exception.
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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, version 2.0, 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, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
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/**
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@file mysys/mulalloc.cc
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*/
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#include <stdarg.h>
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#include <stddef.h>
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#include <sys/types.h>
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#include "my_dbug.h"
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#include "my_inttypes.h"
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#include "my_pointer_arithmetic.h"
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#include "my_sys.h" // IWYU pragma: keep
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#include "mysql/psi/psi_memory.h"
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#include "mysql/service_mysql_alloc.h"
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/*
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Malloc many pointers at the same time
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Only ptr1 can be free'd, and doing this will free all
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the memory allocated. ptr2, etc all point inside big allocated
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memory area.
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SYNOPSIS
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my_multi_malloc()
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myFlags Flags
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ptr1, length1 Multiple arguments terminated by null ptr
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ptr2, length2 ...
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...
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NULL
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*/
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void *my_multi_malloc(PSI_memory_key key, myf myFlags, ...) {
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va_list args;
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char **ptr, *start, *res;
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size_t tot_length, length;
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DBUG_TRACE;
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va_start(args, myFlags);
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tot_length = 0;
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while ((ptr = va_arg(args, char **))) {
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length = va_arg(args, uint);
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tot_length += ALIGN_SIZE(length);
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}
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va_end(args);
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if (!(start = (char *)my_malloc(key, tot_length, myFlags)))
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return 0; /* purecov: inspected */
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va_start(args, myFlags);
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res = start;
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while ((ptr = va_arg(args, char **))) {
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*ptr = res;
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length = va_arg(args, uint);
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res += ALIGN_SIZE(length);
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}
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va_end(args);
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return (void *)start;
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}
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