mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
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97 lines
2.3 KiB
C++
97 lines
2.3 KiB
C++
/* -*- Mode: c++; c-basic-offset: 4; tab-width: 40; indent-tabs-mode: nil -*- */
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/* vim: set ts=40 sw=4 et tw=99: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef jspropertytree_h___
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#define jspropertytree_h___
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#include "jsprvtd.h"
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#include "js/HashTable.h"
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namespace js {
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struct ShapeHasher {
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typedef js::Shape *Key;
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typedef js::StackShape Lookup;
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static inline HashNumber hash(const Lookup &l);
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static inline bool match(Key k, const Lookup &l);
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};
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typedef HashSet<js::Shape *, ShapeHasher, SystemAllocPolicy> KidsHash;
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class KidsPointer {
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private:
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enum {
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SHAPE = 0,
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HASH = 1,
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TAG = 1
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};
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uintptr_t w;
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public:
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bool isNull() const { return !w; }
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void setNull() { w = 0; }
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bool isShape() const { return (w & TAG) == SHAPE && !isNull(); }
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js::Shape *toShape() const {
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JS_ASSERT(isShape());
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return reinterpret_cast<js::Shape *>(w & ~uintptr_t(TAG));
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}
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void setShape(js::Shape *shape) {
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JS_ASSERT(shape);
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JS_ASSERT((reinterpret_cast<uintptr_t>(shape) & TAG) == 0);
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w = reinterpret_cast<uintptr_t>(shape) | SHAPE;
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}
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bool isHash() const { return (w & TAG) == HASH; }
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KidsHash *toHash() const {
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JS_ASSERT(isHash());
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return reinterpret_cast<KidsHash *>(w & ~uintptr_t(TAG));
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}
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void setHash(KidsHash *hash) {
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JS_ASSERT(hash);
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JS_ASSERT((reinterpret_cast<uintptr_t>(hash) & TAG) == 0);
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w = reinterpret_cast<uintptr_t>(hash) | HASH;
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}
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#ifdef DEBUG
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void checkConsistency(js::Shape *aKid) const;
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#endif
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};
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class PropertyTree
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{
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friend struct ::JSFunction;
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JSCompartment *compartment;
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bool insertChild(JSContext *cx, js::Shape *parent, js::Shape *child);
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PropertyTree();
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public:
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enum { MAX_HEIGHT = 128 };
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PropertyTree(JSCompartment *comp)
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: compartment(comp)
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{
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}
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js::Shape *newShape(JSContext *cx);
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js::Shape *getChild(JSContext *cx, Shape *parent, uint32_t nfixed, const StackShape &child);
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#ifdef DEBUG
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static void dumpShapes(JSRuntime *rt);
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static void meter(JSBasicStats *bs, js::Shape *node);
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#endif
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};
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} /* namespace js */
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#endif /* jspropertytree_h___ */
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