1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/js/src/jit/CompilerRoot.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,70 @@
1.4 +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
1.5 + * vim: set ts=8 sts=4 et sw=4 tw=99:
1.6 + * This Source Code Form is subject to the terms of the Mozilla Public
1.7 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.8 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.9 +
1.10 +#ifndef jit_CompilerRoot_h
1.11 +#define jit_CompilerRoot_h
1.12 +
1.13 +#ifdef JS_ION
1.14 +
1.15 +#include "jscntxt.h"
1.16 +
1.17 +#include "jit/Ion.h"
1.18 +#include "jit/IonAllocPolicy.h"
1.19 +#include "js/RootingAPI.h"
1.20 +
1.21 +namespace js {
1.22 +namespace jit {
1.23 +
1.24 +// Roots a read-only GCThing for the lifetime of a single compilation.
1.25 +// Each root is maintained in a linked list that is walked over during tracing.
1.26 +// The CompilerRoot must be heap-allocated and may not go out of scope.
1.27 +template <typename T>
1.28 +class CompilerRoot : public CompilerRootNode
1.29 +{
1.30 + public:
1.31 + CompilerRoot(T ptr)
1.32 + : CompilerRootNode(nullptr)
1.33 + {
1.34 + if (ptr) {
1.35 + JS_ASSERT(!GetIonContext()->runtime->isInsideNursery(ptr));
1.36 + setRoot(ptr);
1.37 + }
1.38 + }
1.39 +
1.40 + public:
1.41 + // Sets the pointer and inserts into root list. The pointer becomes read-only.
1.42 + void setRoot(T root) {
1.43 + CompilerRootNode *&rootList = GetIonContext()->temp->rootList();
1.44 +
1.45 + JS_ASSERT(!ptr_);
1.46 + ptr_ = root;
1.47 + next = rootList;
1.48 + rootList = this;
1.49 + }
1.50 +
1.51 + public:
1.52 + operator T () const { return static_cast<T>(ptr_); }
1.53 + T operator ->() const { return static_cast<T>(ptr_); }
1.54 +
1.55 + private:
1.56 + CompilerRoot() MOZ_DELETE;
1.57 + CompilerRoot(const CompilerRoot<T> &) MOZ_DELETE;
1.58 + CompilerRoot<T> &operator =(const CompilerRoot<T> &) MOZ_DELETE;
1.59 +};
1.60 +
1.61 +typedef CompilerRoot<JSObject*> CompilerRootObject;
1.62 +typedef CompilerRoot<JSFunction*> CompilerRootFunction;
1.63 +typedef CompilerRoot<JSScript*> CompilerRootScript;
1.64 +typedef CompilerRoot<PropertyName*> CompilerRootPropertyName;
1.65 +typedef CompilerRoot<Shape*> CompilerRootShape;
1.66 +typedef CompilerRoot<Value> CompilerRootValue;
1.67 +
1.68 +} // namespace jit
1.69 +} // namespace js
1.70 +
1.71 +#endif // JS_ION
1.72 +
1.73 +#endif /* jit_CompilerRoot_h */
