xadrv/db2/db2_common.c

0001 /**
0002  * @brief Load db2 drivers - static version
0003  *
0004  * @file db2_common.c
0005  */
0006 /* -----------------------------------------------------------------------------
0007  * Enduro/X Middleware Platform for Distributed Transaction Processing
0008  * Copyright (C) 2009-2016, ATR Baltic, Ltd. All Rights Reserved.
0009  * Copyright (C) 2017-2023, Mavimax, Ltd. All Rights Reserved.
0010  * This software is released under one of the following licenses:
0011  * AGPL (with Java and Go exceptions) or Mavimax's license for commercial use.
0012  * See LICENSE file for full text.
0013  * -----------------------------------------------------------------------------
0014  * AGPL license:
0015  *
0016  * This program is free software; you can redistribute it and/or modify it under
0017  * the terms of the GNU Affero General Public License, version 3 as published
0018  * by the Free Software Foundation;
0019  *
0020  * This program is distributed in the hope that it will be useful, but WITHOUT ANY
0021  * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
0022  * PARTICULAR PURPOSE. See the GNU Affero General Public License, version 3
0023  * for more details.
0024  *
0025  * You should have received a copy of the GNU Affero General Public License along
0026  * with this program; if not, write to the Free Software Foundation, Inc.,
0027  * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
0028  *
0029  * -----------------------------------------------------------------------------
0030  * A commercial use license is available from Mavimax, Ltd
0031  * contact@mavimax.com
0032  * -----------------------------------------------------------------------------
0033  */
0034 #ifndef _GNU_SOURCE
0035 #define _GNU_SOURCE
0036 #endif
0037
0038 #include <string.h>
0039 #include <stdio.h>
0040 #include <stdlib.h>
0041
0042 #include <ndrstandard.h>
0043 #include <ndebug.h>
0044 #include <atmi.h>
0045 #include <atmi_int.h>
0046 #include <sys_mqueue.h>
0047
0048 #include "atmi_shm.h"
0049
0050 #include <xa.h>
0051 #include <dlfcn.h>
0052 #include "db2_common.h"
0053 /*---------------------------Externs------------------------------------*/
0054 /*---------------------------Macros-------------------------------------*/
0055 /*---------------------------Enums--------------------------------------*/
0056 /*---------------------------Typedefs-----------------------------------*/
0057 /*---------------------------Globals------------------------------------*/
0058 /*---------------------------Statics------------------------------------*/
0059 /*---------------------------Prototypes---------------------------------*/
0060
0061 /*
0062  * The function is exported and dynamically retrieved after the module was
0063  * fetched
0064  */
0065 struct xa_switch_t *ndrx_get_xa_switch_int(char *symbol, char *descr)
0066 {
0067     struct xa_switch_t * sw = NULL;
0068     void *handle = NULL;
0069     int ret = EXSUCCEED;
0070     NDRX_LOG(log_debug, "%s", descr);
0071
0072     sw = (struct xa_switch_t * )dlsym( RTLD_DEFAULT, symbol );
0073     if( sw == NULL )
0074     {
0075         NDRX_LOG(log_debug, "%s symbol not found in "
0076                 "process address space - loading .so!", symbol);
0077
0078         /* Loading the symbol... */
0079         handle = dlopen (G_atmi_env.xa_rmlib, RTLD_NOW);
0080         if (!handle)
0081         {
0082             NDRX_LOG(log_error, "Failed to load XA Resource Manager lib [%s]: %s",
0083                 G_atmi_env.xa_rmlib, dlerror());
0084             EXFAIL_OUT(ret);
0085         }
0086
0087         /* reslove symbol now... */
0088         if (NULL==(sw = (struct xa_switch_t * )dlsym( handle, symbol )))
0089         {
0090             NDRX_LOG(log_error, "Db2 XA switch `%s' handler "
0091                     "not found!", symbol);
0092             EXFAIL_OUT(ret);
0093         }
0094     }
0095
0096 out:
0097     if (EXSUCCEED!=ret && NULL!=handle)
0098     {
0099         /* close the handle */
0100         dlclose(handle);
0101     }
0102
0103
0104     return sw;
0105 }
0106
0107 /* vim: set ts=4 sw=4 et smartindent: */