Jack2 1.9.6
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00001 /* 00002 Copyright (C) 2004-2008 Grame 00003 00004 This program is free software; you can redistribute it and/or modify 00005 it under the terms of the GNU Lesser General Public License as published by 00006 the Free Software Foundation; either version 2.1 of the License, or 00007 (at your option) any later version. 00008 00009 This program is distributed in the hope that it will be useful, 00010 but WITHOUT ANY WARRANTY; without even the implied warranty of 00011 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00012 GNU Lesser General Public License for more details. 00013 00014 You should have received a copy of the GNU Lesser General Public License 00015 along with this program; if not, write to the Free Software 00016 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 00017 00018 */ 00019 00020 #ifndef __JackAtomic_linux__ 00021 #define __JackAtomic_linux__ 00022 00023 #include "JackTypes.h" 00024 00025 #ifdef __PPC__ 00026 00027 static inline int CAS(register UInt32 value, register UInt32 newvalue, register volatile void* addr) 00028 { 00029 register int result; 00030 register UInt32 tmp; 00031 asm volatile ( 00032 "# CAS \n" 00033 " lwarx %4, 0, %1 \n" // creates a reservation on addr 00034 " cmpw %4, %2 \n" // test value at addr 00035 " bne- 1f \n" 00036 " sync \n" // synchronize instructions 00037 " stwcx. %3, 0, %1 \n" // if the reservation is not altered 00038 // stores the new value at addr 00039 " bne- 1f \n" 00040 " li %0, 1 \n" 00041 " b 2f \n" 00042 "1: \n" 00043 " li %0, 0 \n" 00044 "2: \n" 00045 : "=r" (result) 00046 : "r" (addr), "r" (value), "r" (newvalue), "r" (tmp) 00047 ); 00048 return result; 00049 } 00050 00051 #elif defined(__i386__) || defined(__x86_64__) 00052 00053 #define LOCK "lock ; " 00054 00055 static inline char CAS(volatile UInt32 value, UInt32 newvalue, volatile void* addr) 00056 { 00057 register char ret; 00058 __asm__ __volatile__ ( 00059 "# CAS \n\t" 00060 LOCK "cmpxchg %2, (%1) \n\t" 00061 "sete %0 \n\t" 00062 : "=a" (ret) 00063 : "c" (addr), "d" (newvalue), "a" (value) 00064 ); 00065 return ret; 00066 } 00067 00068 #else 00069 00070 static inline bool CAS(volatile UInt32 value, volatile UInt32 newvalue, 00071 volatile void *addr) 00072 { 00073 return __sync_bool_compare_and_swap((volatile UInt32 *)addr, 00074 value, newvalue); 00075 } 00076 00077 #endif 00078 00079 #if !defined(__i386__) && !defined(__x86_64__) && !defined(__PPC__) 00080 #warning using builtin gcc (version > 4.1) atomic 00081 00082 static inline char CAS(volatile UInt32 value, UInt32 newvalue, volatile void* addr) 00083 { 00084 return __sync_bool_compare_and_swap (&addr, value, newvalue); 00085 } 00086 #endif 00087 00088 00089 #endif 00090