First

2024-07-02 18:10:39 +02:00
commit 48ab06b1d9
733 changed files with 321088 additions and 0 deletions
@@ -0,0 +1,73 @@
+///////////////////////////////////////////////////////////////////////////////
+// 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_GCC_EATHREAD_SYNC_GCC_H
+#define EATHREAD_GCC_EATHREAD_SYNC_GCC_H
+
+
+#include <EABase/eabase.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
+// The x86 processor memory architecture ensures read and write consistency on both single and
+// multi processing systems. This makes programming simpler but limits maximimum system performance.
+// We define EAReadBarrier here to be the same as EACompilerMemory barrier in order to limit the 
+// compiler from making any assumptions at its level about memory usage. Year 2003+ versions of the 
+// Microsoft SDK define a 'MemoryBarrier' statement which has the same effect as EAReadWriteBarrier.
+
+#if (((__GNUC__ * 100) + __GNUC_MINOR__) >= 401) // GCC 4.1 or later
+	#define EAReadBarrier      __sync_synchronize
+	#define EAWriteBarrier     __sync_synchronize
+	#define EAReadWriteBarrier __sync_synchronize
+#else
+	#define EAReadBarrier      EACompilerMemoryBarrier
+	#define EAWriteBarrier     EACompilerMemoryBarrier
+	#define EAReadWriteBarrier EACompilerMemoryBarrier
+#endif
+
+
+// EACompilerMemoryBarrier
+
+#if defined(EA_PROCESSOR_ARM) || defined(EA_PROCESSOR_X86) || defined(EA_PROCESSOR_X86_64)
+	#define EACompilerMemoryBarrier() __asm__ __volatile__ ("":::"memory")
+#else
+	#define EACompilerMemoryBarrier()
+#endif
+
+
+
+#endif // EATHREAD_GCC_EATHREAD_SYNC_GCC_H
+
+
+
+
+
+
+
+