comparison system/System.h @ 835:1d439494604c

Memory barriers in ringbuffer

 
 #define MLOCK(a,b)   1
 #define MUNLOCK(a,b) 1
 #define MUNLOCK_SAMPLEBLOCK(a) 1
 #define MUNLOCKALL() 1
+
+extern void SystemMemoryBarrier();
+#define MBARRIER()   SystemMemoryBarrier()
 
 #define DLOPEN(a,b)  LoadLibrary((a).toStdWString().c_str())
 #define DLSYM(a,b)   GetProcAddress((HINSTANCE)(a),(b))
 #define DLCLOSE(a)   (!FreeLibrary((HINSTANCE)(a)))
 #define DLERROR()    ""

 #define DEFAULT_LADSPA_PATH "$HOME/Library/Audio/Plug-Ins/LADSPA:/Library/Audio/Plug-Ins/LADSPA"
 #define DEFAULT_DSSI_PATH   "$HOME/Library/Audio/Plug-Ins/DSSI:/Library/Audio/Plug-Ins/DSSI"
 
 #define MUNLOCKALL() 1
 
+#include <libkern/OSAtomic.h>
+#define MBARRIER() OSMemoryBarrier()
+
 #else 
 
 #ifdef sun
 #undef MLOCK
 #undef MUNLOCK

 #define DEFAULT_LADSPA_PATH "$HOME/ladspa:$HOME/.ladspa:/usr/local/lib/ladspa:/usr/lib/ladspa"
 #define DEFAULT_DSSI_PATH "$HOME/dssi:$HOME/.dssi:/usr/local/lib/dssi:/usr/lib/dssi"
 
 #define MUNLOCKALL() ::munlockall()
 
-#endif /* __APPLE__ */
+#if (__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 1)
+#define MBARRIER() __sync_synchronize()
+#else
+extern void SystemMemoryBarrier();
+#define MBARRIER() SystemMemoryBarrier()
+#endif
+
+#endif /* ! __APPLE__ */
 
 #endif /* ! _WIN32 */
 
 enum ProcessStatus { ProcessRunning, ProcessNotRunning, UnknownProcessStatus };
 extern ProcessStatus GetProcessStatus(int pid);