forked from mirrors/gecko-dev
9b5ea61bed
* DefaultHasher<T*> used HashGeneric<size_t> * nsPtrHashKey<T> used HashGeneric<T*> * nsRefPtrHashKey<T> used NS_PTR_TO_UINT32 >> 2 Make sure to always use HashGeneric<T*> for these. Remove unused / redundant hash keys. Differential Revision: https://phabricator.services.mozilla.com/D186553
49 lines
1.3 KiB
C++
49 lines
1.3 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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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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/* Definitions for nsPtrHashKey<T> and nsVoidPtrHashKey. */
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#ifndef nsPointerHashKeys_h
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#define nsPointerHashKeys_h
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#include "nscore.h"
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#include "mozilla/Attributes.h"
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#include "mozilla/HashFunctions.h"
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#include "PLDHashTable.h"
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/**
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* hashkey wrapper using T* KeyType
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*
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* @see nsTHashtable::EntryType for specification
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*/
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template <class T>
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class nsPtrHashKey : public PLDHashEntryHdr {
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public:
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using KeyType = T*;
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using KeyTypePointer = const T*;
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explicit nsPtrHashKey(const T* aKey) : mKey(const_cast<T*>(aKey)) {}
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nsPtrHashKey(nsPtrHashKey&& aToMove) = default;
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~nsPtrHashKey() = default;
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KeyType GetKey() const { return mKey; }
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bool KeyEquals(KeyTypePointer aKey) const { return aKey == mKey; }
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static KeyTypePointer KeyToPointer(KeyType aKey) { return aKey; }
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static PLDHashNumber HashKey(KeyTypePointer aKey) {
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return mozilla::HashGeneric(aKey);
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}
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enum { ALLOW_MEMMOVE = true };
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protected:
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T* MOZ_NON_OWNING_REF mKey;
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};
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using nsVoidPtrHashKey = nsPtrHashKey<const void>;
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#endif // nsPointerHashKeys_h
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