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test/packages/EAThread/include/eathread/apple/eathread_sync_apple.h

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+///////////////////////////////////////////////////////////////////////////////
+// Copyright (c) Electronic Arts Inc. All rights reserved.
+///////////////////////////////////////////////////////////////////////////////
+
+#if defined(EA_PRAGMA_ONCE_SUPPORTED)
+	#pragma once // Some compilers (e.g. VC++) benefit significantly from using this. We've measured 3-4% build speed improvements in apps as a result.
+#endif
+
+/////////////////////////////////////////////////////////////////////////////
+// Functionality related to memory and code generation synchronization.
+/////////////////////////////////////////////////////////////////////////////
+
+
+#ifndef EATHREAD_APPLE_EATHREAD_SYNC_APPLE_H
+#define EATHREAD_APPLE_EATHREAD_SYNC_APPLE_H
+
+
+#include <EABase/eabase.h>
+#include <libkern/OSAtomic.h>
+
+
+#define EA_THREAD_SYNC_IMPLEMENTED
+
+
+// EAProcessorPause
+// Intel has defined a 'pause' instruction for x86 processors starting with the P4, though this simply
+// maps to the otherwise undocumented 'rep nop' instruction. This pause instruction is important for
+// high performance spinning, as otherwise a high performance penalty incurs.
+
+#if defined(EA_PROCESSOR_X86) || defined(EA_PROCESSOR_X86_64)
+	#define EAProcessorPause() __asm__ __volatile__ ("rep ; nop")
+#else
+	#define EAProcessorPause()
+#endif
+
+
+
+// EAReadBarrier / EAWriteBarrier / EAReadWriteBarrier
+
+#define EAReadBarrier      OSMemoryBarrier
+#define EAWriteBarrier     OSMemoryBarrier
+#define EAReadWriteBarrier OSMemoryBarrier
+
+
+
+// EACompilerMemoryBarrier
+
+#define EACompilerMemoryBarrier() __asm__ __volatile__ ("":::"memory")
+
+
+
+
+#endif // EATHREAD_APPLE_EATHREAD_SYNC_APPLE_H
+
+
+
+
+
+
+
+