#include "mono/io-layer/wapi.h"
-#ifdef WAPI_ATOMIC_ASM
-#if defined(sparc) || defined (__sparc__)
-volatile unsigned char _wapi_sparc_lock;
-#endif
-#else
+#ifndef WAPI_ATOMIC_ASM
static pthread_mutex_t spin = PTHREAD_MUTEX_INITIALIZER;
static mono_once_t spin_once=MONO_ONCE_INIT;