The Tor Browser: media/omx-plugin/include/gb/utils/Vector.h@97036ab72558 (annotated)

media/omx-plugin/include/gb/utils/Vector.h@97036ab72558 (annotated)

media/omx-plugin/include/gb/utils/Vector.h

Tue, 06 Jan 2015 21:39:09 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Tue, 06 Jan 2015 21:39:09 +0100
branch: TOR_BUG_9701
changeset 8: 97036ab72558
permissions: -rw-r--r--

Conditionally force memory storage according to privacy.thirdparty.isolate;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.

 /*
  * Copyright (C) 2005 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *      http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
 #ifndef ANDROID_VECTOR_H
 #define ANDROID_VECTOR_H
 #include <new>
 #include <stdint.h>
 #include <sys/types.h>
 #include <utils/Log.h>
 #include <utils/VectorImpl.h>
 #include <utils/TypeHelpers.h>
 // ---------------------------------------------------------------------------
 namespace android {
 /*!
  * The main templated vector class ensuring type safety
  * while making use of VectorImpl.
  * This is the class users want to use.
  */
 template <class TYPE>
 class Vector : private VectorImpl
 {
 public:
             typedef TYPE    value_type;
     /*!
      * Constructors and destructors
      */
                             Vector();
                             Vector(const Vector<TYPE>& rhs);
     virtual                 ~Vector();
     /*! copy operator */
             const Vector<TYPE>&     operator = (const Vector<TYPE>& rhs) const;
             Vector<TYPE>&           operator = (const Vector<TYPE>& rhs);
     /*
      * empty the vector
      */
     inline  void            clear()             { VectorImpl::clear(); }
     /*!
      * vector stats
      */
     //! returns number of items in the vector
     inline  size_t          size() const                { return VectorImpl::size(); }
     //! returns wether or not the vector is empty
     inline  bool            isEmpty() const             { return VectorImpl::isEmpty(); }
     //! returns how many items can be stored without reallocating the backing store
     inline  size_t          capacity() const            { return VectorImpl::capacity(); }
     //! setst the capacity. capacity can never be reduced less than size()
     inline  ssize_t         setCapacity(size_t size)    { return VectorImpl::setCapacity(size); }
     /*!
      * C-style array access
      */
     //! read-only C-style access
     inline  const TYPE*     array() const;
     //! read-write C-style access
             TYPE*           editArray();
     /*!
      * accessors
      */
     //! read-only access to an item at a given index
     inline  const TYPE&     operator [] (size_t index) const;
     //! alternate name for operator []
     inline  const TYPE&     itemAt(size_t index) const;
     //! stack-usage of the vector. returns the top of the stack (last element)
             const TYPE&     top() const;
     //! same as operator [], but allows to access the vector backward (from the end) with a negative index
             const TYPE&     mirrorItemAt(ssize_t index) const;
     /*!
      * modifing the array
      */
     //! copy-on write support, grants write access to an item
             TYPE&           editItemAt(size_t index);
     //! grants right acces to the top of the stack (last element)
             TYPE&           editTop();
             /*!
              * append/insert another vector
              */
     //! insert another vector at a given index
             ssize_t         insertVectorAt(const Vector<TYPE>& vector, size_t index);
     //! append another vector at the end of this one
             ssize_t         appendVector(const Vector<TYPE>& vector);
     //! insert an array at a given index
             ssize_t         insertArrayAt(const TYPE* array, size_t index, size_t length);
     //! append an array at the end of this vector
             ssize_t         appendArray(const TYPE* array, size_t length);
             /*!
              * add/insert/replace items
              */
     //! insert one or several items initialized with their default constructor
     inline  ssize_t         insertAt(size_t index, size_t numItems = 1);
     //! insert one or several items initialized from a prototype item
             ssize_t         insertAt(const TYPE& prototype_item, size_t index, size_t numItems = 1);
     //! pop the top of the stack (removes the last element). No-op if the stack's empty
     inline  void            pop();
     //! pushes an item initialized with its default constructor
     inline  void            push();
     //! pushes an item on the top of the stack
             void            push(const TYPE& item);
     //! same as push() but returns the index the item was added at (or an error)
     inline  ssize_t         add();
     //! same as push() but returns the index the item was added at (or an error)
             ssize_t         add(const TYPE& item);
     //! replace an item with a new one initialized with its default constructor
     inline  ssize_t         replaceAt(size_t index);
     //! replace an item with a new one
             ssize_t         replaceAt(const TYPE& item, size_t index);
     /*!
      * remove items
      */
     //! remove several items
     inline  ssize_t         removeItemsAt(size_t index, size_t count = 1);
     //! remove one item
     inline  ssize_t         removeAt(size_t index)  { return removeItemsAt(index); }
     /*!
      * sort (stable) the array
      */
      typedef int (*compar_t)(const TYPE* lhs, const TYPE* rhs);
      typedef int (*compar_r_t)(const TYPE* lhs, const TYPE* rhs, void* state);
      inline status_t        sort(compar_t cmp);
      inline status_t        sort(compar_r_t cmp, void* state);
 protected:
     virtual void    do_construct(void* storage, size_t num) const;
     virtual void    do_destroy(void* storage, size_t num) const;
     virtual void    do_copy(void* dest, const void* from, size_t num) const;
     virtual void    do_splat(void* dest, const void* item, size_t num) const;
     virtual void    do_move_forward(void* dest, const void* from, size_t num) const;
     virtual void    do_move_backward(void* dest, const void* from, size_t num) const;
 };
 // ---------------------------------------------------------------------------
 // No user serviceable parts from here...
 // ---------------------------------------------------------------------------
 template<class TYPE> inline
 Vector<TYPE>::Vector()
     : VectorImpl(sizeof(TYPE),
                 ((traits<TYPE>::has_trivial_ctor   ? HAS_TRIVIAL_CTOR   : 0)
                 |(traits<TYPE>::has_trivial_dtor   ? HAS_TRIVIAL_DTOR   : 0)
                 |(traits<TYPE>::has_trivial_copy   ? HAS_TRIVIAL_COPY   : 0))
                 )
 {
 }
 template<class TYPE> inline
 Vector<TYPE>::Vector(const Vector<TYPE>& rhs)
     : VectorImpl(rhs) {
 }
 template<class TYPE> inline
 Vector<TYPE>::~Vector() {
     finish_vector();
 }
 template<class TYPE> inline
 Vector<TYPE>& Vector<TYPE>::operator = (const Vector<TYPE>& rhs) {
     VectorImpl::operator = (rhs);
     return *this;
 }
 template<class TYPE> inline
 const Vector<TYPE>& Vector<TYPE>::operator = (const Vector<TYPE>& rhs) const {
     VectorImpl::operator = (rhs);
     return *this;
 }
 template<class TYPE> inline
 const TYPE* Vector<TYPE>::array() const {
     return static_cast<const TYPE *>(arrayImpl());
 }
 template<class TYPE> inline
 TYPE* Vector<TYPE>::editArray() {
     return static_cast<TYPE *>(editArrayImpl());
 }
 template<class TYPE> inline
 const TYPE& Vector<TYPE>::operator[](size_t index) const {
     LOG_FATAL_IF( index>=size(),
                   "itemAt: index %d is past size %d", (int)index, (int)size() );
     return *(array() + index);
 }
 template<class TYPE> inline
 const TYPE& Vector<TYPE>::itemAt(size_t index) const {
     return operator[](index);
 }
 template<class TYPE> inline
 const TYPE& Vector<TYPE>::mirrorItemAt(ssize_t index) const {
     LOG_FATAL_IF( (index>0 ? index : -index)>=size(),
                   "mirrorItemAt: index %d is past size %d",
                   (int)index, (int)size() );
     return *(array() + ((index<0) ? (size()-index) : index));
 }
 template<class TYPE> inline
 const TYPE& Vector<TYPE>::top() const {
     return *(array() + size() - 1);
 }
 template<class TYPE> inline
 TYPE& Vector<TYPE>::editItemAt(size_t index) {
     return *( static_cast<TYPE *>(editItemLocation(index)) );
 }
 template<class TYPE> inline
 TYPE& Vector<TYPE>::editTop() {
     return *( static_cast<TYPE *>(editItemLocation(size()-1)) );
 }
 template<class TYPE> inline
 ssize_t Vector<TYPE>::insertVectorAt(const Vector<TYPE>& vector, size_t index) {
     return VectorImpl::insertVectorAt(reinterpret_cast<const VectorImpl&>(vector), index);
 }
 template<class TYPE> inline
 ssize_t Vector<TYPE>::appendVector(const Vector<TYPE>& vector) {
     return VectorImpl::appendVector(reinterpret_cast<const VectorImpl&>(vector));
 }
 template<class TYPE> inline
 ssize_t Vector<TYPE>::insertArrayAt(const TYPE* array, size_t index, size_t length) {
     return VectorImpl::insertArrayAt(array, index, length);
 }
 template<class TYPE> inline
 ssize_t Vector<TYPE>::appendArray(const TYPE* array, size_t length) {
     return VectorImpl::appendArray(array, length);
 }
 template<class TYPE> inline
 ssize_t Vector<TYPE>::insertAt(const TYPE& item, size_t index, size_t numItems) {
     return VectorImpl::insertAt(&item, index, numItems);
 }
 template<class TYPE> inline
 void Vector<TYPE>::push(const TYPE& item) {
     return VectorImpl::push(&item);
 }
 template<class TYPE> inline
 ssize_t Vector<TYPE>::add(const TYPE& item) {
     return VectorImpl::add(&item);
 }
 template<class TYPE> inline
 ssize_t Vector<TYPE>::replaceAt(const TYPE& item, size_t index) {
     return VectorImpl::replaceAt(&item, index);
 }
 template<class TYPE> inline
 ssize_t Vector<TYPE>::insertAt(size_t index, size_t numItems) {
     return VectorImpl::insertAt(index, numItems);
 }
 template<class TYPE> inline
 void Vector<TYPE>::pop() {
     VectorImpl::pop();
 }
 template<class TYPE> inline
 void Vector<TYPE>::push() {
     VectorImpl::push();
 }
 template<class TYPE> inline
 ssize_t Vector<TYPE>::add() {
     return VectorImpl::add();
 }
 template<class TYPE> inline
 ssize_t Vector<TYPE>::replaceAt(size_t index) {
     return VectorImpl::replaceAt(index);
 }
 template<class TYPE> inline
 ssize_t Vector<TYPE>::removeItemsAt(size_t index, size_t count) {
     return VectorImpl::removeItemsAt(index, count);
 }
 template<class TYPE> inline
 status_t Vector<TYPE>::sort(Vector<TYPE>::compar_t cmp) {
     return VectorImpl::sort((VectorImpl::compar_t)cmp);
 }
 template<class TYPE> inline
 status_t Vector<TYPE>::sort(Vector<TYPE>::compar_r_t cmp, void* state) {
     return VectorImpl::sort((VectorImpl::compar_r_t)cmp, state);
 }
 // ---------------------------------------------------------------------------
 template<class TYPE>
 void Vector<TYPE>::do_construct(void* storage, size_t num) const {
     construct_type( reinterpret_cast<TYPE*>(storage), num );
 }
 template<class TYPE>
 void Vector<TYPE>::do_destroy(void* storage, size_t num) const {
     destroy_type( reinterpret_cast<TYPE*>(storage), num );
 }
 template<class TYPE>
 void Vector<TYPE>::do_copy(void* dest, const void* from, size_t num) const {
     copy_type( reinterpret_cast<TYPE*>(dest), reinterpret_cast<const TYPE*>(from), num );
 }
 template<class TYPE>
 void Vector<TYPE>::do_splat(void* dest, const void* item, size_t num) const {
     splat_type( reinterpret_cast<TYPE*>(dest), reinterpret_cast<const TYPE*>(item), num );
 }
 template<class TYPE>
 void Vector<TYPE>::do_move_forward(void* dest, const void* from, size_t num) const {
     move_forward_type( reinterpret_cast<TYPE*>(dest), reinterpret_cast<const TYPE*>(from), num );
 }
 template<class TYPE>
 void Vector<TYPE>::do_move_backward(void* dest, const void* from, size_t num) const {
     move_backward_type( reinterpret_cast<TYPE*>(dest), reinterpret_cast<const TYPE*>(from), num );
 }
 }; // namespace android
 // ---------------------------------------------------------------------------
 #endif // ANDROID_VECTOR_H

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media/omx-plugin/include/gb/utils/Vector.h@97036ab72558 (annotated)

media/omx-plugin/include/gb/utils/Vector.h