1da2e3ebdSchin /*********************************************************************** 2da2e3ebdSchin * * 3da2e3ebdSchin * This software is part of the ast package * 4*b30d1939SAndy Fiddaman * Copyright (c) 1985-2011 AT&T Intellectual Property * 5da2e3ebdSchin * and is licensed under the * 6*b30d1939SAndy Fiddaman * Eclipse Public License, Version 1.0 * 77c2fbfb3SApril Chin * by AT&T Intellectual Property * 8da2e3ebdSchin * * 9da2e3ebdSchin * A copy of the License is available at * 10*b30d1939SAndy Fiddaman * http://www.eclipse.org/org/documents/epl-v10.html * 11*b30d1939SAndy Fiddaman * (with md5 checksum b35adb5213ca9657e911e9befb180842) * 12da2e3ebdSchin * * 13da2e3ebdSchin * Information and Software Systems Research * 14da2e3ebdSchin * AT&T Research * 15da2e3ebdSchin * Florham Park NJ * 16da2e3ebdSchin * * 17da2e3ebdSchin * Glenn Fowler <gsf@research.att.com> * 18da2e3ebdSchin * David Korn <dgk@research.att.com> * 19da2e3ebdSchin * Phong Vo <kpv@research.att.com> * 20da2e3ebdSchin * * 21da2e3ebdSchin ***********************************************************************/ 22da2e3ebdSchin #pragma prototyped 23da2e3ebdSchin 24*b30d1939SAndy Fiddaman #include "asohdr.h" 25da2e3ebdSchin 26*b30d1939SAndy Fiddaman #if defined(_UWIN) && defined(_BLD_ast) 27da2e3ebdSchin 28*b30d1939SAndy Fiddaman NoN(asolock) 29da2e3ebdSchin 30da2e3ebdSchin #else 31da2e3ebdSchin 32da2e3ebdSchin int 33*b30d1939SAndy Fiddaman asolock(unsigned int volatile* lock, unsigned int key, int type) 34da2e3ebdSchin { 35*b30d1939SAndy Fiddaman unsigned int k; 36da2e3ebdSchin 37*b30d1939SAndy Fiddaman if (key) 38*b30d1939SAndy Fiddaman switch (type) 39da2e3ebdSchin { 40*b30d1939SAndy Fiddaman case ASO_UNLOCK: 41*b30d1939SAndy Fiddaman return *lock == 0 ? 0 : asocasint(lock, key, 0) == key ? 0 : -1; 42*b30d1939SAndy Fiddaman case ASO_TRYLOCK: 43*b30d1939SAndy Fiddaman return *lock == key ? 0 : asocasint(lock, 0, key) == 0 ? 0 : -1; 44*b30d1939SAndy Fiddaman case ASO_LOCK: 45*b30d1939SAndy Fiddaman if (*lock == key) 46*b30d1939SAndy Fiddaman return 0; 47*b30d1939SAndy Fiddaman /*FALLTHROUGH*/ 48*b30d1939SAndy Fiddaman case ASO_SPINLOCK: 49*b30d1939SAndy Fiddaman for (k = 0; asocasint(lock, 0, key) != 0; ASOLOOP(k)); 50*b30d1939SAndy Fiddaman return 0; 51da2e3ebdSchin } 52da2e3ebdSchin return -1; 53da2e3ebdSchin } 54da2e3ebdSchin 55da2e3ebdSchin #endif 56