WIP: prototype ffi support (from 2084663004)

include/v8-ffi.h

+// Copyright 2016 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef V8_FFI_H_
+#define V8_FFI_H_
+
+#include "v8.h"  // NOLINT(build/include)
+
+namespace v8 {
+
+class Function;
+template <class T>
+class Local;
+class String;
+
+namespace ffi {
+
+enum class FFIType {
+  kInt32,
+  kInt64,
+  kFloat32,
+  kFloat64,
+  kCharPtr,
+  kTypedArray,
+  kBufferNoCopy,
+  kFunction,
+  kStructPtr,
+  kForeign,
+  kRawJS
+};
+
+struct FFISignature;
+struct FFITypeElement;
+
+struct FFIStructElement {
+  const char* name;
+  FFITypeElement* type;
+};
+
+struct FFIStructSignature {
+  size_t elem_count;
+  FFIStructElement* elems;
+};
+
+union FFISupplementalInfo {
+  FFISignature* function_signature;
+  FFIStructSignature* struct_elements;
+};
+
+struct FFITypeElement {
+  FFIType type;
+  FFISupplementalInfo* info;  // For specifying function type
+};
+
+struct FFISignature {
+  size_t return_count;
+  size_t param_count;
+  FFITypeElement* representations;
+};
+
+struct NativeFunction {
+  FFISignature* sig;
+  uint8_t* start;
+};
+
+Local<Function> CompileJSToNativeWrapper(Isolate* isolate, Local<String> name,
+                                         NativeFunction func);
+void* FFIFunctionBind(Isolate* isolate, NativeFunction func, Object* args);
+void* BuildFFIArgumentSerializer(Isolate* isolate, NativeFunction func);
+void* BuildFFIArgumentDeserializer(Isolate* isolate, NativeFunction func);
+}  // namespace ffi
+}  // namespace v8
+
+#endif  // V8_FFI_H_