mutex_setbit.il
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上传日期:2007-06-06
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- /* ***** BEGIN LICENSE BLOCK *****
- * Source last modified: $Id: mutex_setbit.il,v 1.1 2003/10/30 18:37:01 nhart Exp $
- *
- * Portions Copyright (c) 1995-2003 RealNetworks, Inc. All Rights Reserved.
- *
- * The contents of this file, and the files included with this file,
- * are subject to the current version of the RealNetworks Public
- * Source License (the "RPSL") available at
- * http://www.helixcommunity.org/content/rpsl unless you have licensed
- * the file under the current version of the RealNetworks Community
- * Source License (the "RCSL") available at
- * http://www.helixcommunity.org/content/rcsl, in which case the RCSL
- * will apply. You may also obtain the license terms directly from
- * RealNetworks. You may not use this file except in compliance with
- * the RPSL or, if you have a valid RCSL with RealNetworks applicable
- * to this file, the RCSL. Please see the applicable RPSL or RCSL for
- * the rights, obligations and limitations governing use of the
- * contents of the file.
- *
- * This file is part of the Helix DNA Technology. RealNetworks is the
- * developer of the Original Code and owns the copyrights in the
- * portions it created.
- *
- * This file, and the files included with this file, is distributed
- * and made available on an 'AS IS' basis, WITHOUT WARRANTY OF ANY
- * KIND, EITHER EXPRESS OR IMPLIED, AND REALNETWORKS HEREBY DISCLAIMS
- * ALL SUCH WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES
- * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET
- * ENJOYMENT OR NON-INFRINGEMENT.
- *
- * Technology Compatibility Kit Test Suite(s) Location:
- * http://www.helixcommunity.org/content/tck
- *
- * Contributor(s):
- *
- * ***** END LICENSE BLOCK ***** */
- /*
- * mutex_setbit.il
- *
- * Solaris/SPARC inline assembly mutex routines used by mutex.h
- *
- * Note: These are implemented using the standard SPARC leaf procedure
- * optimization, so the %o "output" registers are acutally our input and
- * local registers.
- *
- */
- /***********************************************************************
- * extern "C" int _HXMutexSetBitCAS(HX_MUTEX pLock) %i0
- *
- * Test-and-Set primitive op based on CAS.
- *
- * This implementation is based on an example from The SPARC Architecture
- * Manual V9, pg. 318.
- * This is implemented using the SPARC leaf procedure optimization.
- * This is implemented using CAS which is not available on older processors.
- */
- .inline _HXMutexSetBitCAS,4 /* one 32-bit arg == 4 bytes */
- mov 1,%o1
- cas [%o0],%g0,%o1
- mov %o1,%o0
- membar #LoadLoad | #LoadStore
- .end
- /***********************************************************************
- * extern "C" int _HXMutexLockImp(HX_MUTEX pLock) %i0
- *
- * Note: This is implemented using the standard SPARC leaf procedure
- * optimization, so the %o "output" registers are acutally our
- * input and local registers.
- *
- * Note: this implementation is based on an example from
- * The SPARC Architecture Manual V9, pg. 318.
- */
- .inline _HXMutexClearBit,4 /* one 32-bit arg == 4 bytes */
- membar #StoreStore
- membar #LoadStore
- stw %g0,[%o0]
- .end
- /***********************************************************************
- * extern "C" int _HXMutexSetBitSWAP(HX_MUTEX pLock) %i0
- *
- * Test-and-Set primitive op based on SWAP.
- * This is the old, less scalable SWAP-based test-and-test lock.
- *
- * This is implemented using the SPARC leaf procedure optimization.
- *
- * THIS IS CURRENTLY UNUSED! USE _HXMutexSetBitCAS!
- */
- .inline _HXMutexSetBitSWAP,4 /* one 32-bit arg == 4 bytes */
- mov %o0,%o2
- mov 1,%o0
- swap [%o2],%o0
- .end