added AS library

lib/angelscript/source/as_atomic.cpp

@@ -0,0 +1,163 @@
+/*
+   AngelCode Scripting Library
+   Copyright (c) 2003-2013 Andreas Jonsson
+
+   This software is provided 'as-is', without any express or implied
+   warranty. In no event will the authors be held liable for any
+   damages arising from the use of this software.
+
+   Permission is granted to anyone to use this software for any
+   purpose, including commercial applications, and to alter it and
+   redistribute it freely, subject to the following restrictions:
+
+   1. The origin of this software must not be misrepresented; you
+      must not claim that you wrote the original software. If you use
+      this software in a product, an acknowledgment in the product
+      documentation would be appreciated but is not required.
+
+   2. Altered source versions must be plainly marked as such, and
+      must not be misrepresented as being the original software.
+
+   3. This notice may not be removed or altered from any source
+      distribution.
+
+   The original version of this library can be located at:
+   http://www.angelcode.com/angelscript/
+
+   Andreas Jonsson
+   andreas@angelcode.com
+*/
+ 
+//
+// as_atomic.cpp
+//
+// The implementation of the atomic class for thread safe reference counting
+//
+
+#include "as_atomic.h"
+
+BEGIN_AS_NAMESPACE
+
+asCAtomic::asCAtomic()
+{
+	value = 0;
+}
+
+asDWORD asCAtomic::get() const
+{
+	return value;
+}
+
+void asCAtomic::set(asDWORD val)
+{
+	value = val;
+}
+
+asDWORD asCAtomic::atomicInc()
+{
+	return asAtomicInc((int&)value);
+}
+
+asDWORD asCAtomic::atomicDec()
+{
+	return asAtomicDec((int&)value);
+}
+
+//
+// The following code implements the atomicInc and atomicDec on different platforms
+//
+#if defined(AS_NO_THREADS) || defined(AS_NO_ATOMIC)
+
+int asAtomicInc(int &value)
+{
+	return ++value;
+}
+
+int asAtomicDec(int &value)
+{
+	return --value;
+}
+
+#elif defined(AS_XENON) /// XBox360
+
+END_AS_NAMESPACE
+#include <xtl.h>
+BEGIN_AS_NAMESPACE
+
+int asAtomicInc(int &value)
+{
+	return InterlockedIncrement((LONG*)&value);
+}
+
+int asAtomicDec(int &value)
+{
+	return InterlockedDecrement((LONG*)&value);
+}
+
+#elif defined(AS_WIN)
+
+END_AS_NAMESPACE
+#define WIN32_MEAN_AND_LEAN
+#include <windows.h>
+BEGIN_AS_NAMESPACE
+
+int asAtomicInc(int &value)
+{
+	return InterlockedIncrement((LONG*)&value);
+}
+
+int asAtomicDec(int &value)
+{
+	asASSERT(value > 0);
+	return InterlockedDecrement((LONG*)&value);
+}
+
+#elif defined(AS_LINUX) || defined(AS_BSD) || defined(AS_ILLUMOS) || defined(AS_ANDROID)
+
+//
+// atomic_inc_and_test() and atomic_dec_and_test() from asm/atomic.h is not meant 
+// to be used outside the Linux kernel. Instead we should use the GNUC provided 
+// __sync_add_and_fetch() and __sync_sub_and_fetch() functions.
+//
+// Reference: http://golubenco.org/blog/atomic-operations/
+//
+// These are only available in GCC 4.1 and above, so for older versions we 
+// use the critical sections, though it is a lot slower.
+// 
+
+int asAtomicInc(int &value)
+{
+	return __sync_add_and_fetch(&value, 1);
+}
+
+int asAtomicDec(int &value)
+{
+	return __sync_sub_and_fetch(&value, 1);
+}
+
+#elif defined(AS_MAC) || defined(AS_IPHONE)
+
+END_AS_NAMESPACE
+#include <libkern/OSAtomic.h>
+BEGIN_AS_NAMESPACE
+
+int asAtomicInc(int &value)
+{
+	return OSAtomicIncrement32((int32_t*)&value);
+}
+
+int asAtomicDec(int &value)
+{
+	return OSAtomicDecrement32((int32_t*)&value);
+}
+
+#else
+
+// If we get here, then the configuration in as_config.h
+//  is wrong for the compiler/platform combination. 
+int ERROR_PleaseFixTheConfig[-1];
+
+#endif
+
+END_AS_NAMESPACE
+