xpcom/glue/nsClassHashtable.h@129ffea94266 (annotated)
xpcom/glue/nsClassHashtable.h
Sat, 03 Jan 2015 20:18:00 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Sat, 03 Jan 2015 20:18:00 +0100
- branch
- TOR_BUG_3246
- changeset 7
- 129ffea94266
- permissions
- -rw-r--r--
Conditionally enable double key logic according to:
private browsing mode or privacy.thirdparty.isolate preference and
implement in GetCookieStringCommon and FindCookie where it counts...
With some reservations of how to convince FindCookie users to test
condition and pass a nullptr when disabling double key logic.
| michael@0 | 1 | /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ |
| michael@0 | 2 | /* This Source Code Form is subject to the terms of the Mozilla Public |
| michael@0 | 3 | * License, v. 2.0. If a copy of the MPL was not distributed with this |
| michael@0 | 4 | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| michael@0 | 5 | |
| michael@0 | 6 | #ifndef nsClassHashtable_h__ |
| michael@0 | 7 | #define nsClassHashtable_h__ |
| michael@0 | 8 | |
| michael@0 | 9 | #include "nsBaseHashtable.h" |
| michael@0 | 10 | #include "nsHashKeys.h" |
| michael@0 | 11 | #include "nsAutoPtr.h" |
| michael@0 | 12 | |
| michael@0 | 13 | /** |
| michael@0 | 14 | * templated hashtable class maps keys to C++ object pointers. |
| michael@0 | 15 | * See nsBaseHashtable for complete declaration. |
| michael@0 | 16 | * @param KeyClass a wrapper-class for the hashtable key, see nsHashKeys.h |
| michael@0 | 17 | * for a complete specification. |
| michael@0 | 18 | * @param Class the class-type being wrapped |
| michael@0 | 19 | * @see nsInterfaceHashtable, nsClassHashtable |
| michael@0 | 20 | */ |
| michael@0 | 21 | template<class KeyClass,class T> |
| michael@0 | 22 | class nsClassHashtable : |
| michael@0 | 23 | public nsBaseHashtable< KeyClass, nsAutoPtr<T>, T* > |
| michael@0 | 24 | { |
| michael@0 | 25 | public: |
| michael@0 | 26 | typedef typename KeyClass::KeyType KeyType; |
| michael@0 | 27 | typedef T* UserDataType; |
| michael@0 | 28 | typedef nsBaseHashtable< KeyClass, nsAutoPtr<T>, T* > base_type; |
| michael@0 | 29 | |
| michael@0 | 30 | nsClassHashtable() |
| michael@0 | 31 | { |
| michael@0 | 32 | } |
| michael@0 | 33 | explicit nsClassHashtable(uint32_t aInitSize) |
| michael@0 | 34 | : nsBaseHashtable<KeyClass,nsAutoPtr<T>,T*>(aInitSize) |
| michael@0 | 35 | { |
| michael@0 | 36 | } |
| michael@0 | 37 | |
| michael@0 | 38 | /** |
| michael@0 | 39 | * @copydoc nsBaseHashtable::Get |
| michael@0 | 40 | * @param pData if the key doesn't exist, pData will be set to nullptr. |
| michael@0 | 41 | */ |
| michael@0 | 42 | bool Get(KeyType aKey, UserDataType* pData) const; |
| michael@0 | 43 | |
| michael@0 | 44 | /** |
| michael@0 | 45 | * @copydoc nsBaseHashtable::Get |
| michael@0 | 46 | * @returns nullptr if the key is not present. |
| michael@0 | 47 | */ |
| michael@0 | 48 | UserDataType Get(KeyType aKey) const; |
| michael@0 | 49 | |
| michael@0 | 50 | /** |
| michael@0 | 51 | * Remove the entry for the given key from the hashtable and return it in |
| michael@0 | 52 | * aOut. If the key is not in the hashtable, aOut's pointer is set to |
| michael@0 | 53 | * nullptr. |
| michael@0 | 54 | * |
| michael@0 | 55 | * Normally, an entry is deleted when it's removed from an nsClassHashtable, |
| michael@0 | 56 | * but this function transfers ownership of the entry back to the caller |
| michael@0 | 57 | * through aOut -- the entry will be deleted when aOut goes out of scope. |
| michael@0 | 58 | * |
| michael@0 | 59 | * @param aKey the key to get and remove from the hashtable |
| michael@0 | 60 | */ |
| michael@0 | 61 | void RemoveAndForget(KeyType aKey, nsAutoPtr<T> &aOut); |
| michael@0 | 62 | }; |
| michael@0 | 63 | |
| michael@0 | 64 | // |
| michael@0 | 65 | // nsClassHashtable definitions |
| michael@0 | 66 | // |
| michael@0 | 67 | |
| michael@0 | 68 | template<class KeyClass,class T> |
| michael@0 | 69 | bool |
| michael@0 | 70 | nsClassHashtable<KeyClass,T>::Get(KeyType aKey, T** retVal) const |
| michael@0 | 71 | { |
| michael@0 | 72 | typename base_type::EntryType* ent = this->GetEntry(aKey); |
| michael@0 | 73 | |
| michael@0 | 74 | if (ent) |
| michael@0 | 75 | { |
| michael@0 | 76 | if (retVal) |
| michael@0 | 77 | *retVal = ent->mData; |
| michael@0 | 78 | |
| michael@0 | 79 | return true; |
| michael@0 | 80 | } |
| michael@0 | 81 | |
| michael@0 | 82 | if (retVal) |
| michael@0 | 83 | *retVal = nullptr; |
| michael@0 | 84 | |
| michael@0 | 85 | return false; |
| michael@0 | 86 | } |
| michael@0 | 87 | |
| michael@0 | 88 | template<class KeyClass,class T> |
| michael@0 | 89 | T* |
| michael@0 | 90 | nsClassHashtable<KeyClass,T>::Get(KeyType aKey) const |
| michael@0 | 91 | { |
| michael@0 | 92 | typename base_type::EntryType* ent = this->GetEntry(aKey); |
| michael@0 | 93 | |
| michael@0 | 94 | if (!ent) |
| michael@0 | 95 | return nullptr; |
| michael@0 | 96 | |
| michael@0 | 97 | return ent->mData; |
| michael@0 | 98 | } |
| michael@0 | 99 | |
| michael@0 | 100 | template<class KeyClass,class T> |
| michael@0 | 101 | void |
| michael@0 | 102 | nsClassHashtable<KeyClass,T>::RemoveAndForget(KeyType aKey, nsAutoPtr<T> &aOut) |
| michael@0 | 103 | { |
| michael@0 | 104 | aOut = nullptr; |
| michael@0 | 105 | nsAutoPtr<T> ptr; |
| michael@0 | 106 | |
| michael@0 | 107 | typename base_type::EntryType *ent = this->GetEntry(aKey); |
| michael@0 | 108 | if (!ent) |
| michael@0 | 109 | return; |
| michael@0 | 110 | |
| michael@0 | 111 | // Transfer ownership from ent->mData into aOut. |
| michael@0 | 112 | aOut = ent->mData; |
| michael@0 | 113 | |
| michael@0 | 114 | this->Remove(aKey); |
| michael@0 | 115 | } |
| michael@0 | 116 | |
| michael@0 | 117 | #endif // nsClassHashtable_h__ |
