semmutex-r0drv-freebsd.c revision 5ea40b04201696e445c4eeb0d1a238543aeb9167
462e60a19d02a99b2b1a5c08dff74bb0808d707cvboxsync * IPRT - Mutex Semaphores, Ring-0 Driver, FreeBSD.
462e60a19d02a99b2b1a5c08dff74bb0808d707cvboxsync * Copyright (C) 2010 Sun Microsystems, Inc.
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync * This file is part of VirtualBox Open Source Edition (OSE), as
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync * available from http://www.virtualbox.org. This file is free software;
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync * you can redistribute it and/or modify it under the terms of the GNU
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync * General Public License (GPL) as published by the Free Software
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync * Foundation, in version 2 as it comes in the "COPYING" file of the
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync * The contents of this file may alternatively be used under the terms
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync * of the Common Development and Distribution License Version 1.0
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync * VirtualBox OSE distribution, in which case the provisions of the
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync * CDDL are applicable instead of those of the GPL.
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync * You may elect to license modified versions of this file under the
7b9f0c34e9ea328981c99e97054bdf8684d9d620vboxsync * terms and conditions of either the GPL or the CDDL or both.
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync * Clara, CA 95054 USA or visit http://www.sun.com if you need
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync * additional information or have any questions.
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync/*******************************************************************************
b1cc3e87518139898395f96974ecff9e6bf228fbvboxsync* Header Files *
b1cc3e87518139898395f96974ecff9e6bf228fbvboxsync*******************************************************************************/
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsync/*******************************************************************************
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsync* Structures and Typedefs *
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsync*******************************************************************************/
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsync * Wrapper for the FreeBSD (sleep) mutex.
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsync /** Magic value (RTSEMMUTEX_MAGIC). */
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsync /** The FreeBSD shared/exclusive lock mutex. */
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsyncRTDECL(int) RTSemMutexCreate(PRTSEMMUTEX phMutexSem)
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsync AssertCompile(sizeof(RTSEMMUTEXINTERNAL) > sizeof(void *));
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsync PRTSEMMUTEXINTERNAL pThis = (PRTSEMMUTEXINTERNAL)RTMemAllocZ(sizeof(*pThis));
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsync sx_init_flags(&pThis->SxLock, "IPRT Mutex Semaphore", SX_LOCK_RECURSED);
ecf100db90e8e3af96312908282d3c20e754fbe8vboxsync AssertMsgReturn(pThis->u32Magic == RTSEMMUTEX_MAGIC, ("%p: u32Magic=%RX32\n", pThis, pThis->u32Magic), VERR_INVALID_HANDLE);
ecf100db90e8e3af96312908282d3c20e754fbe8vboxsync AssertReturn(ASMAtomicCmpXchgU32(&pThis->u32Magic, RTSEMMUTEX_MAGIC_DEAD, RTSEMMUTEX_MAGIC), VERR_INVALID_HANDLE);
e38a1f5933935fe8db152ea06dac5aa1be27d870vboxsyncRTDECL(int) RTSemMutexRequest(RTSEMMUTEX hMutexSem, RTMSINTERVAL cMillies)
ecf100db90e8e3af96312908282d3c20e754fbe8vboxsync AssertMsgReturn(pThis->u32Magic == RTSEMMUTEX_MAGIC, ("%p: u32Magic=%RX32\n", pThis, pThis->u32Magic), VERR_INVALID_HANDLE);
ecf100db90e8e3af96312908282d3c20e754fbe8vboxsync * GROSS HACK: poll implementation of timeout.
ecf100db90e8e3af96312908282d3c20e754fbe8vboxsync /** @todo Implement timeouts in RTSemMutexRequest. */
ecf100db90e8e3af96312908282d3c20e754fbe8vboxsync } while (RTTimeSystemMilliTS() - StartTS < cMillies);
2f3883b126a405f92b19e829472f614c7352b4f9vboxsyncRTDECL(int) RTSemMutexRequestNoResume(RTSEMMUTEX hMutexSem, RTMSINTERVAL cMillies)
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync AssertMsgReturn(pThis->u32Magic == RTSEMMUTEX_MAGIC, ("%p: u32Magic=%RX32\n", pThis, pThis->u32Magic), VERR_INVALID_HANDLE);
462e60a19d02a99b2b1a5c08dff74bb0808d707cvboxsync * GROSS HACK: poll implementation of timeout.
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsync /** @todo Implement timeouts and interrupt checks in
462e60a19d02a99b2b1a5c08dff74bb0808d707cvboxsync * RTSemMutexRequestNoResume. */
fb41ad77bcfbdb3aaa1fc9503a37ee6a70dc6461vboxsync } while (RTTimeSystemMilliTS() - StartTS < cMillies);
2f3883b126a405f92b19e829472f614c7352b4f9vboxsync AssertMsgReturn(pThis->u32Magic == RTSEMMUTEX_MAGIC, ("%p: u32Magic=%RX32\n", pThis, pThis->u32Magic), VERR_INVALID_HANDLE);
c10a6f0c7041e4d1ee50ad38425aab9d43c55522vboxsyncRTDECL(bool) RTSemMutexIsOwned(RTSEMMUTEX hMutexSem)
3fb3de312d1ff675e0f7cc62a7d46cbb1d5d9353vboxsync AssertMsgReturn(pThis->u32Magic == RTSEMMUTEX_MAGIC, ("%p: u32Magic=%RX32\n", pThis, pThis->u32Magic), false);