From 354bb40e75d94466e91fe6960523612c9d17ccfb Mon Sep 17 00:00:00 2001 From: Karen Arutyunov Date: Thu, 2 Nov 2017 23:11:29 +0300 Subject: Add implementation --- mysql/mysys/mulalloc.c | 64 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 64 insertions(+) create mode 100644 mysql/mysys/mulalloc.c (limited to 'mysql/mysys/mulalloc.c') diff --git a/mysql/mysys/mulalloc.c b/mysql/mysys/mulalloc.c new file mode 100644 index 0000000..e47e9f4 --- /dev/null +++ b/mysql/mysys/mulalloc.c @@ -0,0 +1,64 @@ +/* Copyright (c) 2000, 2015, Oracle and/or its affiliates. All rights reserved. + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; version 2 of the License. + + This program 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 General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA */ + +#include "mysys_priv.h" +#include "my_sys.h" +#include + +/* + Malloc many pointers at the same time + Only ptr1 can be free'd, and doing this will free all + the memory allocated. ptr2, etc all point inside big allocated + memory area. + + SYNOPSIS + my_multi_malloc() + myFlags Flags + ptr1, length1 Multiple arguments terminated by null ptr + ptr2, length2 ... + ... + NULL +*/ + +void* my_multi_malloc(PSI_memory_key key, myf myFlags, ...) +{ + va_list args; + char **ptr,*start,*res; + size_t tot_length,length; + DBUG_ENTER("my_multi_malloc"); + + va_start(args,myFlags); + tot_length=0; + while ((ptr=va_arg(args, char **))) + { + length=va_arg(args,uint); + tot_length+=ALIGN_SIZE(length); + } + va_end(args); + + if (!(start=(char *) my_malloc(key, tot_length,myFlags))) + DBUG_RETURN(0); /* purecov: inspected */ + + va_start(args,myFlags); + res=start; + while ((ptr=va_arg(args, char **))) + { + *ptr=res; + length=va_arg(args,uint); + res+=ALIGN_SIZE(length); + } + va_end(args); + DBUG_RETURN((void*) start); +} -- cgit v1.1