js/src/jshashutil.h@a63d609f5ebe (annotated)
js/src/jshashutil.h
Thu, 15 Jan 2015 15:55:04 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Thu, 15 Jan 2015 15:55:04 +0100
- branch
- TOR_BUG_9701
- changeset 9
- a63d609f5ebe
- permissions
- -rw-r--r--
Back out 97036ab72558 which inappropriately compared turds to third parties.
| michael@0 | 1 | /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- |
| michael@0 | 2 | * vim: set ts=8 sts=4 et sw=4 tw=99: |
| michael@0 | 3 | * This Source Code Form is subject to the terms of the Mozilla Public |
| michael@0 | 4 | * License, v. 2.0. If a copy of the MPL was not distributed with this |
| michael@0 | 5 | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| michael@0 | 6 | |
| michael@0 | 7 | #ifndef jshashutil_h |
| michael@0 | 8 | #define jshashutil_h |
| michael@0 | 9 | |
| michael@0 | 10 | #include "jscntxt.h" |
| michael@0 | 11 | |
| michael@0 | 12 | namespace js { |
| michael@0 | 13 | |
| michael@0 | 14 | /* |
| michael@0 | 15 | * Used to add entries to a js::HashMap or HashSet where the key depends on a GC |
| michael@0 | 16 | * thing that may be moved by generational collection between the call to |
| michael@0 | 17 | * lookupForAdd() and relookupOrAdd(). |
| michael@0 | 18 | */ |
| michael@0 | 19 | template <class T> |
| michael@0 | 20 | struct DependentAddPtr |
| michael@0 | 21 | { |
| michael@0 | 22 | typedef typename T::AddPtr AddPtr; |
| michael@0 | 23 | typedef typename T::Entry Entry; |
| michael@0 | 24 | |
| michael@0 | 25 | template <class Lookup> |
| michael@0 | 26 | DependentAddPtr(const ExclusiveContext *cx, const T &table, const Lookup &lookup) |
| michael@0 | 27 | : addPtr(table.lookupForAdd(lookup)) |
| michael@0 | 28 | #ifdef JSGC_GENERATIONAL |
| michael@0 | 29 | , originalGcNumber(cx->zone()->gcNumber()) |
| michael@0 | 30 | #endif |
| michael@0 | 31 | {} |
| michael@0 | 32 | |
| michael@0 | 33 | template <class KeyInput, class ValueInput> |
| michael@0 | 34 | bool add(const ExclusiveContext *cx, T &table, const KeyInput &key, const ValueInput &value) { |
| michael@0 | 35 | #ifdef JSGC_GENERATIONAL |
| michael@0 | 36 | bool gcHappened = originalGcNumber != cx->zone()->gcNumber(); |
| michael@0 | 37 | if (gcHappened) |
| michael@0 | 38 | addPtr = table.lookupForAdd(key); |
| michael@0 | 39 | #endif |
| michael@0 | 40 | return table.relookupOrAdd(addPtr, key, value); |
| michael@0 | 41 | } |
| michael@0 | 42 | |
| michael@0 | 43 | typedef void (DependentAddPtr::* ConvertibleToBool)(); |
| michael@0 | 44 | void nonNull() {} |
| michael@0 | 45 | |
| michael@0 | 46 | bool found() const { return addPtr.found(); } |
| michael@0 | 47 | operator ConvertibleToBool() const { return found() ? &DependentAddPtr::nonNull : 0; } |
| michael@0 | 48 | const Entry &operator*() const { return *addPtr; } |
| michael@0 | 49 | const Entry *operator->() const { return &*addPtr; } |
| michael@0 | 50 | |
| michael@0 | 51 | private: |
| michael@0 | 52 | AddPtr addPtr ; |
| michael@0 | 53 | #ifdef JSGC_GENERATIONAL |
| michael@0 | 54 | const uint64_t originalGcNumber; |
| michael@0 | 55 | #endif |
| michael@0 | 56 | |
| michael@0 | 57 | DependentAddPtr() MOZ_DELETE; |
| michael@0 | 58 | DependentAddPtr(const DependentAddPtr&) MOZ_DELETE; |
| michael@0 | 59 | DependentAddPtr& operator=(const DependentAddPtr&) MOZ_DELETE; |
| michael@0 | 60 | }; |
| michael@0 | 61 | |
| michael@0 | 62 | } // namespace js |
| michael@0 | 63 | |
| michael@0 | 64 | #endif |
