/*
* Copyright (c) 2015, 2019, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2015, 2019 SAP SE. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code 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
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*
*/
// Encapsulates the libodm library and provides more convenient interfaces.
#ifndef OS_AIX_LIBODM_AIX_HPP
#define OS_AIX_LIBODM_AIX_HPP
#include <odmi.h>
// The purpose of this code is to dynamically load the libodm library
// instead of statically linking against it. The library is AIX-specific.
// It only exists on AIX, not on PASE. In order to share binaries
// between AIX and PASE, we can't directly link against it.
typedef int (*fun_odm_initialize )(void);
typedef char* (*fun_odm_set_path )(char*);
typedef CLASS_SYMBOL (*fun_odm_mount_class)(char*);
typedef void* (*fun_odm_get_obj )(CLASS_SYMBOL, char*, void*, int);
typedef int (*fun_odm_terminate )(void);
class dynamicOdm {
void *_libhandle;
protected:
fun_odm_initialize _odm_initialize;
fun_odm_set_path _odm_set_path;
fun_odm_mount_class _odm_mount_class;
fun_odm_get_obj _odm_get_obj;
fun_odm_terminate _odm_terminate;
public:
dynamicOdm();
~dynamicOdm();
bool odm_loaded() {return _libhandle != NULL; }
};
// We provide a more convenient interface for odm access and
// especially to determine the exact AIX kernel version.
class odmWrapper : private dynamicOdm {
CLASS_SYMBOL _odm_class;
char *_data;
bool _initialized;
void clean_data();
public:
// Make sure everything gets initialized and cleaned up properly.
explicit odmWrapper(const char* odm_class_name, const char* odm_path = NULL) : _odm_class((CLASS_SYMBOL)-1),
_data(NULL), _initialized(false) {
if (!odm_loaded()) { return; }
_initialized = ((*_odm_initialize)() != -1);
if (_initialized) {
// should we free what odm_set_path returns, man page suggests it
// see https://www.ibm.com/support/knowledgecenter/en/ssw_aix_71/o_bostechref/odm_set_path.html
if (odm_path) { (*_odm_set_path)((char*)odm_path); }
_odm_class = (*_odm_mount_class)((char*)odm_class_name);
}
}
~odmWrapper() {
if (_initialized) { (*_odm_terminate)(); clean_data(); }
}
CLASS_SYMBOL odm_class() { return _odm_class; }
bool has_class() { return odm_class() != (CLASS_SYMBOL)-1; }
int class_offset(const char *field, bool is_aix_5);
char* data() { return _data; }
char* retrieve_obj(const char* name = NULL) {
clean_data();
char *cnp = (char*)(void*)(*_odm_get_obj)(odm_class(), (char*) name, NULL, (name == NULL) ? ODM_NEXT : ODM_FIRST);
if (cnp != (char*)-1) { _data = cnp; }
return data();
}
int read_short(int offs) {
short *addr = (short*)(data() + offs);
return *addr;
}
// Determine the exact AIX kernel version as 4 byte value.
// The high order 2 bytes must be initialized already. They can be determined by uname.
static void determine_os_kernel_version(uint32_t* p_ver);
};
#endif // OS_AIX_LIBODM_AIX_HPP
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