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Diffstat (limited to 'V8Binding/v8/src/handles.h')
| -rw-r--r-- | V8Binding/v8/src/handles.h | 359 |
1 files changed, 0 insertions, 359 deletions
diff --git a/V8Binding/v8/src/handles.h b/V8Binding/v8/src/handles.h deleted file mode 100644 index 5d57465..0000000 --- a/V8Binding/v8/src/handles.h +++ /dev/null @@ -1,359 +0,0 @@ -// Copyright 2006-2008 the V8 project authors. All rights reserved. -// Redistribution and use in source and binary forms, with or without -// modification, are permitted provided that the following conditions are -// met: -// -// * Redistributions of source code must retain the above copyright -// notice, this list of conditions and the following disclaimer. -// * Redistributions in binary form must reproduce the above -// copyright notice, this list of conditions and the following -// disclaimer in the documentation and/or other materials provided -// with the distribution. -// * Neither the name of Google Inc. nor the names of its -// contributors may be used to endorse or promote products derived -// from this software without specific prior written permission. -// -// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS -// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT -// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR -// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT -// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, -// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT -// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, -// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY -// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT -// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE -// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - -#ifndef V8_HANDLES_H_ -#define V8_HANDLES_H_ - -#include "apiutils.h" - -namespace v8 { -namespace internal { - -// ---------------------------------------------------------------------------- -// A Handle provides a reference to an object that survives relocation by -// the garbage collector. -// Handles are only valid within a HandleScope. -// When a handle is created for an object a cell is allocated in the heap. - -template<class T> -class Handle { - public: - INLINE(Handle(T** location)) { location_ = location; } - INLINE(explicit Handle(T* obj)); - - INLINE(Handle()) : location_(NULL) {} - - // Constructor for handling automatic up casting. - // Ex. Handle<JSFunction> can be passed when Handle<Object> is expected. - template <class S> Handle(Handle<S> handle) { -#ifdef DEBUG - T* a = NULL; - S* b = NULL; - a = b; // Fake assignment to enforce type checks. - USE(a); -#endif - location_ = reinterpret_cast<T**>(handle.location()); - } - - INLINE(T* operator ->() const) { return operator*(); } - - // Check if this handle refers to the exact same object as the other handle. - bool is_identical_to(const Handle<T> other) const { - return operator*() == *other; - } - - // Provides the C++ dereference operator. - INLINE(T* operator*() const); - - // Returns the address to where the raw pointer is stored. - T** location() const { - ASSERT(location_ == NULL || - reinterpret_cast<Address>(*location_) != kZapValue); - return location_; - } - - template <class S> static Handle<T> cast(Handle<S> that) { - T::cast(*that); - return Handle<T>(reinterpret_cast<T**>(that.location())); - } - - static Handle<T> null() { return Handle<T>(); } - bool is_null() { return location_ == NULL; } - - // Closes the given scope, but lets this handle escape. See - // implementation in api.h. - inline Handle<T> EscapeFrom(v8::HandleScope* scope); - - private: - T** location_; -}; - - -// A stack-allocated class that governs a number of local handles. -// After a handle scope has been created, all local handles will be -// allocated within that handle scope until either the handle scope is -// deleted or another handle scope is created. If there is already a -// handle scope and a new one is created, all allocations will take -// place in the new handle scope until it is deleted. After that, -// new handles will again be allocated in the original handle scope. -// -// After the handle scope of a local handle has been deleted the -// garbage collector will no longer track the object stored in the -// handle and may deallocate it. The behavior of accessing a handle -// for which the handle scope has been deleted is undefined. -class HandleScope { - public: - HandleScope() : previous_(current_) { - current_.extensions = 0; - } - - ~HandleScope() { - Leave(&previous_); - } - - // Counts the number of allocated handles. - static int NumberOfHandles(); - - // Creates a new handle with the given value. - template <typename T> - static inline T** CreateHandle(T* value) { - internal::Object** cur = current_.next; - if (cur == current_.limit) cur = Extend(); - // Update the current next field, set the value in the created - // handle, and return the result. - ASSERT(cur < current_.limit); - current_.next = cur + 1; - - T** result = reinterpret_cast<T**>(cur); - *result = value; - return result; - } - - private: - // Prevent heap allocation or illegal handle scopes. - HandleScope(const HandleScope&); - void operator=(const HandleScope&); - void* operator new(size_t size); - void operator delete(void* size_t); - - static v8::ImplementationUtilities::HandleScopeData current_; - const v8::ImplementationUtilities::HandleScopeData previous_; - - // Pushes a fresh handle scope to be used when allocating new handles. - static void Enter( - v8::ImplementationUtilities::HandleScopeData* previous) { - *previous = current_; - current_.extensions = 0; - } - - // Re-establishes the previous scope state. Should be called only - // once, and only for the current scope. - static void Leave( - const v8::ImplementationUtilities::HandleScopeData* previous) { - if (current_.extensions > 0) { - DeleteExtensions(); - } - current_ = *previous; -#ifdef DEBUG - ZapRange(current_.next, current_.limit); -#endif - } - - // Extend the handle scope making room for more handles. - static internal::Object** Extend(); - - // Deallocates any extensions used by the current scope. - static void DeleteExtensions(); - - // Zaps the handles in the half-open interval [start, end). - static void ZapRange(internal::Object** start, internal::Object** end); - - friend class v8::HandleScope; - friend class v8::ImplementationUtilities; -}; - - -// ---------------------------------------------------------------------------- -// Handle operations. -// They might invoke garbage collection. The result is an handle to -// an object of expected type, or the handle is an error if running out -// of space or encountering an internal error. - -void NormalizeProperties(Handle<JSObject> object, - PropertyNormalizationMode mode, - int expected_additional_properties); -void NormalizeElements(Handle<JSObject> object); -void TransformToFastProperties(Handle<JSObject> object, - int unused_property_fields); -void FlattenString(Handle<String> str); - -Handle<Object> SetProperty(Handle<JSObject> object, - Handle<String> key, - Handle<Object> value, - PropertyAttributes attributes); - -Handle<Object> SetProperty(Handle<Object> object, - Handle<Object> key, - Handle<Object> value, - PropertyAttributes attributes); - -Handle<Object> ForceSetProperty(Handle<JSObject> object, - Handle<Object> key, - Handle<Object> value, - PropertyAttributes attributes); - -Handle<Object> ForceDeleteProperty(Handle<JSObject> object, - Handle<Object> key); - -Handle<Object> IgnoreAttributesAndSetLocalProperty(Handle<JSObject> object, - Handle<String> key, - Handle<Object> value, - PropertyAttributes attributes); - -Handle<Object> SetPropertyWithInterceptor(Handle<JSObject> object, - Handle<String> key, - Handle<Object> value, - PropertyAttributes attributes); - -Handle<Object> SetElement(Handle<JSObject> object, - uint32_t index, - Handle<Object> value); - -Handle<Object> GetProperty(Handle<JSObject> obj, - const char* name); - -Handle<Object> GetProperty(Handle<Object> obj, - Handle<Object> key); - -Handle<Object> GetPropertyWithInterceptor(Handle<JSObject> receiver, - Handle<JSObject> holder, - Handle<String> name, - PropertyAttributes* attributes); - -Handle<Object> GetPrototype(Handle<Object> obj); - -// Return the object's hidden properties object. If the object has no hidden -// properties and create_if_needed is true, then a new hidden property object -// will be allocated. Otherwise the Heap::undefined_value is returned. -Handle<Object> GetHiddenProperties(Handle<JSObject> obj, bool create_if_needed); - -Handle<Object> DeleteElement(Handle<JSObject> obj, uint32_t index); -Handle<Object> DeleteProperty(Handle<JSObject> obj, Handle<String> prop); - -Handle<Object> LookupSingleCharacterStringFromCode(uint32_t index); - -Handle<JSObject> Copy(Handle<JSObject> obj); - -Handle<FixedArray> AddKeysFromJSArray(Handle<FixedArray>, - Handle<JSArray> array); - -// Get the JS object corresponding to the given script; create it -// if none exists. -Handle<JSValue> GetScriptWrapper(Handle<Script> script); - -// Script line number computations. -void InitScriptLineEnds(Handle<Script> script); -int GetScriptLineNumber(Handle<Script> script, int code_position); - -// Computes the enumerable keys from interceptors. Used for debug mirrors and -// by GetKeysInFixedArrayFor below. -v8::Handle<v8::Array> GetKeysForNamedInterceptor(Handle<JSObject> receiver, - Handle<JSObject> object); -v8::Handle<v8::Array> GetKeysForIndexedInterceptor(Handle<JSObject> receiver, - Handle<JSObject> object); - -enum KeyCollectionType { LOCAL_ONLY, INCLUDE_PROTOS }; - -// Computes the enumerable keys for a JSObject. Used for implementing -// "for (n in object) { }". -Handle<FixedArray> GetKeysInFixedArrayFor(Handle<JSObject> object, - KeyCollectionType type); -Handle<JSArray> GetKeysFor(Handle<JSObject> object); -Handle<FixedArray> GetEnumPropertyKeys(Handle<JSObject> object); - -// Computes the union of keys and return the result. -// Used for implementing "for (n in object) { }" -Handle<FixedArray> UnionOfKeys(Handle<FixedArray> first, - Handle<FixedArray> second); - -Handle<String> SubString(Handle<String> str, int start, int end); - - -// Sets the expected number of properties for the function's instances. -void SetExpectedNofProperties(Handle<JSFunction> func, int nof); - -// Sets the prototype property for a function instance. -void SetPrototypeProperty(Handle<JSFunction> func, Handle<JSObject> value); - -// Sets the expected number of properties based on estimate from compiler. -void SetExpectedNofPropertiesFromEstimate(Handle<SharedFunctionInfo> shared, - int estimate); -void SetExpectedNofPropertiesFromEstimate(Handle<JSFunction> func, - int estimate); - - -Handle<JSGlobalProxy> ReinitializeJSGlobalProxy( - Handle<JSFunction> constructor, - Handle<JSGlobalProxy> global); - -Handle<Object> SetPrototype(Handle<JSFunction> function, - Handle<Object> prototype); - - -// Do lazy compilation of the given function. Returns true on success -// and false if the compilation resulted in a stack overflow. -enum ClearExceptionFlag { KEEP_EXCEPTION, CLEAR_EXCEPTION }; - -bool CompileLazyShared(Handle<SharedFunctionInfo> shared, - ClearExceptionFlag flag, - int loop_nesting); - -bool CompileLazy(Handle<JSFunction> function, ClearExceptionFlag flag); -bool CompileLazyInLoop(Handle<JSFunction> function, ClearExceptionFlag flag); - -// These deal with lazily loaded properties. -void SetupLazy(Handle<JSObject> obj, - int index, - Handle<Context> compile_context, - Handle<Context> function_context); -void LoadLazy(Handle<JSObject> obj, bool* pending_exception); - -class NoHandleAllocation BASE_EMBEDDED { - public: -#ifndef DEBUG - NoHandleAllocation() {} - ~NoHandleAllocation() {} -#else - inline NoHandleAllocation(); - inline ~NoHandleAllocation(); - private: - int extensions_; -#endif -}; - - -// ---------------------------------------------------------------------------- - - -// Stack allocated wrapper call for optimizing adding multiple -// properties to an object. -class OptimizedObjectForAddingMultipleProperties BASE_EMBEDDED { - public: - OptimizedObjectForAddingMultipleProperties(Handle<JSObject> object, - int expected_property_count, - bool condition = true); - ~OptimizedObjectForAddingMultipleProperties(); - private: - bool has_been_transformed_; // Tells whether the object has been transformed. - int unused_property_fields_; // Captures the unused number of field. - Handle<JSObject> object_; // The object being optimized. -}; - - -} } // namespace v8::internal - -#endif // V8_HANDLES_H_ |