Jack2 1.9.6

JackAtomic_os.h

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_WIN32__
00021 #define __JackAtomic_WIN32__
00022 
00023 #include "JackTypes.h"
00024 
00025 #ifndef __MINGW32__
00026 #ifdef __SMP__
00027 #       define LOCK lock
00028 #else
00029 #       define LOCK
00030 #endif
00031 
00032 #ifndef inline
00033         #define inline __inline
00034 #endif
00035 
00036 //----------------------------------------------------------------
00037 // CAS functions
00038 //----------------------------------------------------------------
00039 inline char CAS(volatile UInt32 value, UInt32 newvalue, volatile void * addr)
00040 {
00041     register char c;
00042     __asm {
00043         push    ebx
00044         push    esi
00045         mov     esi, addr
00046         mov     eax, value
00047         mov     ebx, newvalue
00048         LOCK cmpxchg dword ptr [esi], ebx
00049         sete    c
00050         pop     esi
00051         pop     ebx
00052     }
00053     return c;
00054 }
00055 
00056 #else
00057 
00058 #define LOCK "lock ; "
00059 
00060 static inline char CAS(volatile UInt32 value, UInt32 newvalue, volatile void* addr)
00061 {
00062     register char ret;
00063     __asm__ __volatile__ (
00064         "# CAS \n\t"
00065         LOCK "cmpxchg %2, (%1) \n\t"
00066         "sete %0               \n\t"
00067     : "=a" (ret)
00068                 : "c" (addr), "d" (newvalue), "a" (value)
00069             );
00070     return ret;
00071 }
00072 
00073 #endif
00074 
00075 #endif
00076