--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hostsupport/hostopenvg/src/sfCompiler.h	Wed Oct 06 17:59:01 2010 +0100
@@ -0,0 +1,156 @@
+/* Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies).
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and /or associated documentation files
+ * (the "Materials "), to deal in the Materials without restriction,
+ * including without limitation the rights to use, copy, modify, merge,
+ * publish, distribute, sublicense, and/or sell copies of the Materials,
+ * and to permit persons to whom the Materials are furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Materials.
+ *
+ * THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+ * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE MATERIALS OR
+ * THE USE OR OTHER DEALINGS IN THE MATERIALS.
+ */
+
+#ifndef __SFCOMPILER_H
+#define __SFCOMPILER_H
+
+#include <string>
+
+#ifndef __SFDYNAMICPIXELPIPE_H
+#   include "sfDynamicPixelPipe.h"
+#endif
+
+#ifndef __SFDYNAMICBLITTER_H
+#   include "sfDynamicBlitter.h"
+#endif
+
+#ifndef __RIPIXELPIPE_H
+#   include "riPixelPipe.h"
+#endif
+
+#ifndef __SFFUNCTIONCACHE_H
+#   include "sfFunctionCache.h"
+#endif
+
+#include "llvm/LLVMContext.h"
+
+// \note PPCompiler class also caches a certain amount of compiled functions.
+// It may make sense to move the cache into a separate container.
+
+// LLVM forward declarations
+namespace llvm { 
+    class Type;
+    class Constant;
+    class Function;
+    class Module;
+    class ExecutionEngine;
+}
+
+namespace OpenVGRI {
+
+// Pixel-pipeline function with constant state removed:
+typedef void (*PixelPipeFunction)(const PixelPipe::PPUniforms&, PixelPipe::PPVariants&, const Span*, int);
+// Image-blitting function with constant state removed:
+typedef void (*BlitterFunction)(const DynamicBlitter::BlitUniforms&);
+
+class PPCompiler
+{
+public:
+    typedef int PixelPipeHandle;
+    typedef int BlitterHandle;
+private:
+    // Function that generates LLVM-constant from a pixel-pipeline:
+    typedef ::llvm::Constant* (*ConstantGenFunc)(const void* structure, ::llvm::LLVMContext& llvmContext, const ::llvm::Type* structType);
+
+    struct PPCompilerContext {
+        PPCompilerContext();
+        ~PPCompilerContext();
+        // Stores persistent objects related to each component (pixelpipe or blitter).
+        // Note that the execution engine must be a per-process singleton for LLVM before
+        // version 2.7!
+        ::llvm::Module* module;
+        ::llvm::Function* llvmFunction; 
+    };
+
+    struct PartialEvalFunc
+    {
+        ::llvm::Function*   llvmFunc;
+        ::llvm::GlobalVariable*   llvmConst;
+    };
+
+public:
+    PPCompiler();
+    ~PPCompiler();
+
+    static PartialEvalFunc compilePixelPipeline(::llvm::LLVMContext& llvmContext, PPCompilerContext& compilerContext, ConstantGenFunc constGenFunc, const void* state, const std::string& newFuntionName);
+
+    // These functions get an reserve a handle to a pixelpipe/blitter. MUST use release
+    // after done with the function.
+    PixelPipeHandle     compilePixelPipeline(const PixelPipe::SignatureState& state);
+    BlitterHandle       compileBlitter(const DynamicBlitter::BlitSignatureState& state);
+
+    PixelPipeFunction   getPixelPipePtr(PixelPipeHandle handle);
+    BlitterFunction     getBlitterPtr(BlitterHandle handle);
+
+    void releasePixelPipeline(PixelPipeHandle handle);
+    void releaseBlitter(BlitterHandle handle);
+
+    bool init();
+
+    // It seems that under VS, the static init order is not correct so the compiler has to be created
+    // during run-time.
+    static PPCompiler&  getCompiler() { if(!s_compiler) { s_compiler = new PPCompiler(); } return *s_compiler; }
+
+private:
+    bool initPPContext(PPCompilerContext& context, const unsigned char* data, size_t dataSize, const char* functionName);
+    //void* compileRenderingFunction(const void* signatureState, RenderingFunctionType type);
+
+    static ::llvm::Constant* createConstantStruct(const void* structure, size_t structureSize, ::llvm::LLVMContext& llvmContext, const ::llvm::Type* structType);
+    static ::llvm::Constant* createPPConstant(const void* signatureState, ::llvm::LLVMContext& llvmContext, const ::llvm::Type* structType);
+    static ::llvm::Constant* createBlitterConstant(const void* signatureState, ::llvm::LLVMContext& llvmContext, const ::llvm::Type* structType);
+    static ::llvm::Function* findFunctionWithString(::llvm::Module* module, const char* namepart);
+    static void llvmCheckPtrError(const void* ptr, std::string& err);
+
+    static std::string stringOfArray(const RIuint32* arr, int nElems);
+
+private:
+    //::llvm::LLVMContext& getLLVMContext() { return ::llvm::getGlobalContext(); }
+    ::llvm::LLVMContext& getLLVMContext() { return m_llvmContext; }
+
+    // The order is important atm. because llvm context must be destroyed last:
+    //::llvm::LLVMContext& m_llvmContext;
+    PPCompilerContext m_blitterContext;
+    PPCompilerContext m_ppContext;
+    ::llvm::ExecutionEngine* m_executionEngine;
+
+    // \note Loading a system with LLVM already consumes a lot of memory, so
+    // the amount of cached functions can be grown substantially depending on
+    // requirements.
+    enum { NUM_CACHED_PIXELPIPES = 64 };
+    enum { NUM_CACHED_BLITTERS = NUM_CACHED_PIXELPIPES };
+    
+    FunctionCache<PixelPipeHash> m_ppCache;
+    FunctionCache<BlitterHash> m_blitterCache;
+    typedef FunctionCache<PixelPipeHash>::EntryHandle PixelPipeEntryHandle;
+    typedef FunctionCache<BlitterHash>::EntryHandle BlitterEntryHandle;
+    //std::vector<CacheEntry<BlitterHash> > blitterCache;
+    
+    ::llvm::LLVMContext m_llvmContext;
+
+    static PPCompiler* s_compiler;
+};
+
+}
+
+
+#endif
+