/* * hdbc.h * * $Id: hdbc.h,v 1.3 2004/11/11 01:52:37 luesang Exp $ * * Data source connect object management functions * * The iODBC driver manager. * * Copyright (C) 1995 by Ke Jin <kejin@empress.com> * Copyright (C) 1996-2002 by OpenLink Software <iodbc@openlinksw.com> * All Rights Reserved. * * This software is released under the terms of either of the following * licenses: * * - GNU Library General Public License (see LICENSE.LGPL) * - The BSD License (see LICENSE.BSD). * * While not mandated by the BSD license, any patches you make to the * iODBC source code may be contributed back into the iODBC project * at your discretion. Contributions will benefit the Open Source and * Data Access community as a whole. Submissions may be made at: * * http://www.iodbc.org * * * GNU Library Generic Public License Version 2 * ============================================ * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Library General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library 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 * Library General Public License for more details. * * You should have received a copy of the GNU Library General Public * License along with this library; if not, write to the Free * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. * * * The BSD License * =============== * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * 3. Neither the name of OpenLink Software Inc. nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL OPENLINK OR * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #ifndef _HDBC_H #define _HDBC_H #if (ODBCVER >= 0x0300) #include <hdesc.h> #endif typedef struct _drvopt { SQLUSMALLINT Option; SQLULEN Param; SQLCHAR waMode; struct _drvopt *next; } DRVOPT; typedef struct DBC { int type; /* must be 1st field */ HERR herr; SQLRETURN rc; struct DBC * next; HENV genv; /* back point to global env object */ HDBC dhdbc; /* driver's private dbc */ HENV henv; /* back point to instant env object */ HSTMT hstmt; /* list of statement object handle(s) */ #if (ODBCVER >= 0x300) HDESC hdesc; /* list of connection descriptors */ #endif int state; /* options */ UDWORD access_mode; UDWORD autocommit; UDWORD login_timeout; UDWORD odbc_cursors; UDWORD packet_size; UDWORD quiet_mode; UDWORD txn_isolation; SWORD cb_commit; SWORD cb_rollback; wchar_t * current_qualifier; char current_qualifier_WA; SWORD dbc_cip; /* Call in Progess flag */ DRVOPT *drvopt; /* Driver specific connect options */ SQLSMALLINT err_rec; } DBC_t; #define IS_VALID_HDBC(x) \ ((x) != SQL_NULL_HDBC && ((DBC_t *)(x))->type == SQL_HANDLE_DBC) #define ENTER_HDBC(hdbc, holdlock, trace) \ CONN(pdbc, hdbc); \ SQLRETURN retcode = SQL_SUCCESS; \ ODBC_LOCK();\ TRACE(trace); \ if (!IS_VALID_HDBC (pdbc)) \ { \ retcode = SQL_INVALID_HANDLE; \ goto done; \ } \ else if (pdbc->dbc_cip) \ { \ PUSHSQLERR (pdbc->herr, en_S1010); \ retcode = SQL_ERROR; \ goto done; \ } \ pdbc->dbc_cip = 1; \ CLEAR_ERRORS (pdbc); \ if (!holdlock) \ ODBC_UNLOCK() #define LEAVE_HDBC(hdbc, holdlock, trace) \ if (!holdlock) \ ODBC_LOCK (); \ pdbc->dbc_cip = 0; \ done: \ TRACE(trace); \ ODBC_UNLOCK (); \ return (retcode) /* * Note: * - ODBC applications can see address of driver manager's * connection object, i.e connection handle -- a void pointer, * but not detail of it. ODBC applications can neither see * detail driver's connection object nor its address. * * - ODBC driver manager knows its own connection objects and * exposes their address to an ODBC application. Driver manager * also knows address of driver's connection objects and keeps * it via dhdbc field in driver manager's connection object. * * - ODBC driver exposes address of its own connection object to * driver manager without detail. * * - Applications can get driver's connection object handle by * SQLGetInfo() with fInfoType equals to SQL_DRIVER_HDBC. */ enum { en_dbc_allocated, en_dbc_needdata, en_dbc_connected, en_dbc_hstmt }; /* * Internal prototypes */ SQLRETURN SQL_API _iodbcdm_SetConnectOption ( SQLHDBC hdbc, SQLUSMALLINT fOption, SQLULEN vParam, SQLCHAR waMode); SQLRETURN SQL_API _iodbcdm_GetConnectOption ( SQLHDBC hdbc, SQLUSMALLINT fOption, SQLPOINTER pvParam, SQLCHAR waMode); #endif