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/* -*- mode:c; tab-width:8; c-basic-offset:8; indent-tabs-mode:nil; -*- */
/*
Copyright (C) 2017 by Ronnie Sahlberg <ronniesahlberg@gmail.com>
This program 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 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 Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#ifndef _GNU_SOURCE
#define _GNU_SOURCE
#endif
#ifdef STDC_HEADERS
#include <stddef.h>
#endif
#ifdef HAVE_STDINT_H
#include <stdint.h>
#endif
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
#ifdef HAVE_STRING_H
#include <string.h>
#endif
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef HAVE_SYS_UNISTD_H
#include <sys/unistd.h>
#endif
#ifdef HAVE_TIME_H
#include <time.h>
#endif
#ifdef HAVE_SYS_TIME_H
#include <sys/time.h>
#endif
#include "compat.h"
#include <smb2.h>
#include <libsmb2.h>
#include "libsmb2-private.h"
#define container_of(ptr, type, member) ({ \
const typeof( ((type *)0)->member ) *__mptr = (ptr); \
(type *)(void *)( (char *)__mptr - offsetof(type,member) );})
struct smb2_alloc_entry {
struct smb2_alloc_entry *next;
#if 0 /* UNUSED. */
size_t len;
#endif
char buf[0];
};
struct smb2_alloc_header {
struct smb2_alloc_entry *mem;
char buf[0];
};
void *
smb2_alloc_init(struct smb2_context *smb2, size_t size)
{
struct smb2_alloc_header *ptr;
size += offsetof(struct smb2_alloc_header, buf);
ptr = calloc(size, 1);
if (ptr == NULL) {
return NULL;
}
return &ptr->buf[0];
}
void *
smb2_alloc_data(struct smb2_context *smb2, void *memctx, size_t size)
{
struct smb2_alloc_header *hdr;
struct smb2_alloc_entry *ptr;
size += offsetof(struct smb2_alloc_entry, buf);
ptr = calloc(size, 1);
if (ptr == NULL) {
smb2_set_error(smb2, "Failed to alloc %zu bytes", size);
return NULL;
}
#ifndef _MSC_VER
hdr = (struct smb2_alloc_header *)(void *)container_of(memctx, struct smb2_alloc_header, buf);
#else
{
const char* __mptr = memctx;
hdr = (struct smb2_alloc_header*)((char *)__mptr - offsetof(struct smb2_alloc_header, buf));
}
#endif /* !_MSC_VER */
ptr->next = hdr->mem;
hdr->mem = ptr;
return &ptr->buf[0];
}
void
smb2_free_data(struct smb2_context *smb2, void *ptr)
{
struct smb2_alloc_header *hdr;
struct smb2_alloc_entry *ent;
if (ptr == NULL) {
return;
}
#ifndef _MSC_VER
hdr = (struct smb2_alloc_header *)(void *)container_of(ptr, struct smb2_alloc_header, buf);
#else
{
const char* __mptr = ptr;
hdr = (struct smb2_alloc_header*)((char *)__mptr - offsetof(struct smb2_alloc_header, buf));
}
#endif /* !_MSC_VER */
while ((ent = hdr->mem)) {
hdr->mem = ent->next;
free(ent);
}
free(hdr);
}
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