windows/JackAtomic_os.h

   1 /*
   2 Copyright (C) 2004-2008 Grame
   3
   4 This program is free software; you can redistribute it and/or modify
   5 it under the terms of the GNU Lesser General Public License as published by
   6 the Free Software Foundation; either version 2.1 of the License, or
   7 (at your option) any later version.
   8
   9 This program is distributed in the hope that it will be useful,
  10 but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 GNU Lesser General Public License for more details.
  13
  14 You should have received a copy of the GNU Lesser General Public License
  15 along with this program; if not, write to the Free Software
  16 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  17
  18 */
  19
  20 #ifndef __JackAtomic_WIN32__
  21 #define __JackAtomic_WIN32__
  22
  23 #include "JackTypes.h"
  24
  25 #ifndef __MINGW32__
  26 #ifdef __SMP__
  27 #       define LOCK lock
  28 #else
  29 #       define LOCK
  30 #endif
  31
  32 #ifndef inline
  33         #define inline __inline
  34 #endif
  35
  36 //----------------------------------------------------------------
  37 // CAS functions
  38 //----------------------------------------------------------------
  39 inline char CAS(volatile UInt32 value, UInt32 newvalue, volatile void * addr)
  40 {
  41     register char c;
  42     __asm {
  43         push    ebx
  44         push    esi
  45         mov     esi, addr
  46         mov     eax, value
  47         mov     ebx, newvalue
  48         LOCK cmpxchg dword ptr [esi], ebx
  49         sete    c
  50         pop     esi
  51         pop     ebx
  52     }
  53     return c;
  54 }
  55
  56 #else
  57
  58 #define LOCK "lock ; "
  59
  60 static inline char CAS(volatile UInt32 value, UInt32 newvalue, volatile void* addr)
  61 {
  62     register char ret;
  63     __asm__ __volatile__ (
  64         "# CAS \n\t"
  65         LOCK "cmpxchg %2, (%1) \n\t"
  66         "sete %0               \n\t"
  67     : "=a" (ret)
  68                 : "c" (addr), "d" (newvalue), "a" (value)
  69             );
  70     return ret;
  71 }
  72
  73 #endif
  74
  75 #endif
  76