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/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is [Open Source Virtual Machine.].
*
* The Initial Developer of the Original Code is
* Adobe System Incorporated.
* Portions created by the Initial Developer are Copyright (C) 2004-2006
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Adobe AS3 Team
*
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* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* ***** END LICENSE BLOCK ***** */
namespace avmplus
{
/**
* type descriptor for a captured scope chain
*
* Note: ScopeTypeChain is now immutable; once created it cannot be modified
*/
class ScopeTypeChain : public MMgc::GCObject
{
private:
ScopeTypeChain(int32_t _size, int32_t _fullsize, Traits* traits);
static const ScopeTypeChain* create(MMgc::GC* gc, Traits* traits, const ScopeTypeChain* outer, const Value* values, int32_t nValues, Traits* append, Traits* extra);
public:
static const ScopeTypeChain* create(MMgc::GC* gc, Traits* traits, const ScopeTypeChain* outer, const FrameState* state, Traits* append, Traits* extra);
#ifdef VMCFG_AOT
static const ScopeTypeChain* create(MMgc::GC* gc, Traits* traits, const ScopeTypeChain* outer, Traits* const* stateTraits, uint32_t nStateTraits, uint32_t nStateWithTraits, Traits* append, Traits* extra);
#endif
static const ScopeTypeChain* createEmpty(MMgc::GC* gc, Traits* traits);
const ScopeTypeChain* cloneWithNewTraits(MMgc::GC* gc, Traits* traits) const;
Traits* traits() const;
Traits* getScopeTraitsAt(uint32_t i) const;
bool getScopeIsWithAt(uint32_t i) const;
#if VMCFG_METHOD_NAMES
Stringp format(AvmCore* core) const;
#endif
private:
void setScopeAt(uint32_t i, Traits* t, bool w);
// Traits are MMgc-allocated, thus always 8-byte-aligned, so the low 3 bits are available for us to use
static const uintptr_t ISWITH = 0x01;
// ------------------------ DATA SECTION BEGIN
public:
const int32_t size;
const int32_t fullsize;
private:
Traits* const _traits;
uintptr_t _scopes[1]; // actual length = fullsize;
// ------------------------ DATA SECTION END
};
/**
* a captured scope chain
*/
class ScopeChain : public MMgc::GCObject
{
ScopeChain(VTable* vtable, AbcEnv* abcEnv, const ScopeTypeChain* scopeTraits, Namespacep dxns);
#if defined FEATURE_NANOJIT
friend class CodegenLIR;
#endif
public:
/*
dxns is modelled as a variable on an activation object. The activation
object will be in several scope chains, so we can't store dxns in the SC.
When it changes, it's new valuable is visible in all closures in scope.
*/
static ScopeChain* create(MMgc::GC* gc, VTable* vtable, AbcEnv* abcEnv, const ScopeTypeChain* scopeTraits, const ScopeChain* outer, Namespacep dxns);
ScopeChain* cloneWithNewVTable(MMgc::GC* gc, VTable* vtable, AbcEnv* abcEnv, const ScopeTypeChain* scopeTraits = NULL);
VTable* vtable() const;
AbcEnv* abcEnv() const;
const ScopeTypeChain* scopeTraits() const;
int32_t getSize() const;
Atom getScope(int32_t i) const;
void setScope(MMgc::GC* gc, int32_t i, Atom value);
Namespacep getDefaultNamespace() const;
#if VMCFG_METHOD_NAMES
Stringp format(AvmCore* core) const;
#endif
// ------------------------ DATA SECTION BEGIN
private:
VTable* const _vtable;
AbcEnv* const _abcEnv;
const ScopeTypeChain* const _scopeTraits;
DRCWB(Namespacep) const _defaultXmlNamespace;
Atom _scopes[1]; // actual length == size
// ------------------------ DATA SECTION END
};
}