/* * ithread.h * * $Id: ithread.h,v 1.4 2006/07/10 13:49:29 source Exp $ * * Macros for locking & multihreading * * The iODBC driver manager. * * Copyright (C) 1995 by Ke Jin <kejin@empress.com> * Copyright (C) 1996-2006 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). * * Note that the only valid version of the LGPL license as far as this * project is concerned is the original GNU Library General Public License * Version 2, dated June 1991. * * 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; only * Version 2 of the License dated June 1991. * * 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 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 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 _ITHREAD_H #define _ITHREAD_H /* * Threading under windows */ #if defined (WIN32) && !defined (NO_THREADING) # define IODBC_THREADING # define THREAD_IDENT ((unsigned long) GetCurrentThreadId()) # define MUTEX_DECLARE(M) HANDLE M # define MUTEX_INIT(M) M = CreateMutex (NULL, FALSE, NULL) # define MUTEX_DONE(M) CloseHandle (M) # define MUTEX_LOCK(M) WaitForSingleObject (M, INFINITE) # define MUTEX_UNLOCK(M) ReleaseMutex (M) # define SPINLOCK_DECLARE(M) CRITICAL_SECTION M # define SPINLOCK_INIT(M) InitializeCriticalSection (&M) # define SPINLOCK_DONE(M) DeleteCriticalSection (&M) # define SPINLOCK_LOCK(M) EnterCriticalSection (&M) # define SPINLOCK_UNLOCK(M) LeaveCriticalSection (&M) /* * Threading with pthreads */ #elif defined (WITH_PTHREADS) #ifndef _REENTRANT # error Add -D_REENTRANT to your compiler flags #endif #include <pthread.h> # define IODBC_THREADING # ifndef OLD_PTHREADS # define THREAD_IDENT ((unsigned long) (pthread_self ())) # else # define THREAD_IDENT 0UL # endif # define MUTEX_DECLARE(M) pthread_mutex_t M # define MUTEX_INIT(M) pthread_mutex_init (&M, NULL) # define MUTEX_DONE(M) pthread_mutex_destroy (&M) # define MUTEX_LOCK(M) pthread_mutex_lock(&M) # define MUTEX_UNLOCK(M) pthread_mutex_unlock(&M) # define SPINLOCK_DECLARE(M) MUTEX_DECLARE(M) # define SPINLOCK_INIT(M) MUTEX_INIT(M) # define SPINLOCK_DONE(M) MUTEX_DONE(M) # define SPINLOCK_LOCK(M) MUTEX_LOCK(M) # define SPINLOCK_UNLOCK(M) MUTEX_UNLOCK(M) /* * No threading */ #else # undef IODBC_THREADING # undef THREAD_IDENT # define MUTEX_DECLARE(M) int M # define MUTEX_INIT(M) M = 1 # define MUTEX_DONE(M) M = 1 # define MUTEX_LOCK(M) M = 1 # define MUTEX_UNLOCK(M) M = 1 # define SPINLOCK_DECLARE(M) MUTEX_DECLARE (M) # define SPINLOCK_INIT(M) MUTEX_INIT (M) # define SPINLOCK_DONE(M) MUTEX_DONE (M) # define SPINLOCK_LOCK(M) MUTEX_LOCK (M) # define SPINLOCK_UNLOCK(M) MUTEX_UNLOCK (M) #endif #endif /* _ITHREAD_H */