The Tor Browser: xpcom/glue/nsCOMArray.cpp@6474c204b198 (annotated)

xpcom/glue/nsCOMArray.cpp@6474c204b198 (annotated)

xpcom/glue/nsCOMArray.cpp

Wed, 31 Dec 2014 06:09:35 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 06:09:35 +0100
changeset 0: 6474c204b198
permissions: -rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
 /* This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 #include "nsCOMArray.h"
 #include "mozilla/MemoryReporting.h"
 #include "nsCOMPtr.h"
 // This specialization is private to nsCOMArray.
 // It exists solely to automatically zero-out newly created array elements.
 template<>
 class nsTArrayElementTraits<nsISupports*>
 {
     typedef nsISupports* E;
 public:
     // Zero out the value
     static inline void Construct(E *e) {
         new (static_cast<void *>(e)) E();
     }
     // Invoke the copy-constructor in place.
     template<class A>
     static inline void Construct(E *e, const A &arg) {
         new (static_cast<void *>(e)) E(arg);
     }
     // Invoke the destructor in place.
     static inline void Destruct(E *e) {
         e->~E();
     }
 };
 static void ReleaseObjects(nsTArray<nsISupports*> &aArray);
 // implementations of non-trivial methods in nsCOMArray_base
 nsCOMArray_base::nsCOMArray_base(const nsCOMArray_base& aOther)
 {
     // make sure we do only one allocation
     mArray.SetCapacity(aOther.Count());
     AppendObjects(aOther);
 }
 nsCOMArray_base::~nsCOMArray_base()
 {
     Clear();
 }
 int32_t
 nsCOMArray_base::IndexOf(nsISupports* aObject, uint32_t aStartIndex) const
 {
   return mArray.IndexOf(aObject, aStartIndex);
 }
 int32_t
 nsCOMArray_base::IndexOfObject(nsISupports* aObject) const
 {
     nsCOMPtr<nsISupports> supports = do_QueryInterface(aObject);
     if (NS_WARN_IF(!supports))
         return -1;
     uint32_t i, count;
     int32_t retval = -1;
     count = mArray.Length();
     for (i = 0; i < count; ++i) {
         nsCOMPtr<nsISupports> arrayItem = do_QueryInterface(mArray[i]);
         if (arrayItem == supports) {
             retval = i;
             break;
         }
     }
     return retval;
 }
 bool
 nsCOMArray_base::EnumerateForwards(nsBaseArrayEnumFunc aFunc, void* aData) const
 {
     for (uint32_t index = 0; index < mArray.Length(); index++)
         if (!(*aFunc)(mArray[index], aData))
             return false;
     return true;
 }
 bool
 nsCOMArray_base::EnumerateBackwards(nsBaseArrayEnumFunc aFunc, void* aData) const
 {
     for (uint32_t index = mArray.Length(); index--; )
         if (!(*aFunc)(mArray[index], aData))
             return false;
     return true;
 }
 int
 nsCOMArray_base::nsCOMArrayComparator(const void* aElement1, const void* aElement2, void* aData)
 {
     nsCOMArrayComparatorContext* ctx = static_cast<nsCOMArrayComparatorContext*>(aData);
     return (*ctx->mComparatorFunc)(*static_cast<nsISupports* const*>(aElement1),
                                    *static_cast<nsISupports* const*>(aElement2),
                                    ctx->mData);
 }
 void
 nsCOMArray_base::Sort(nsBaseArrayComparatorFunc aFunc, void* aData)
 {
     if (mArray.Length() > 1) {
         nsCOMArrayComparatorContext ctx = {aFunc, aData};
         NS_QuickSort(mArray.Elements(), mArray.Length(), sizeof(nsISupports*),
                      nsCOMArrayComparator, &ctx);
     }
 }
 bool
 nsCOMArray_base::InsertObjectAt(nsISupports* aObject, int32_t aIndex)
 {
     if ((uint32_t)aIndex > mArray.Length())
         return false;
     if (!mArray.InsertElementAt(aIndex, aObject))
         return false;
     NS_IF_ADDREF(aObject);
     return true;
 }
 void
 nsCOMArray_base::InsertElementAt(uint32_t aIndex, nsISupports* aElement)
 {
     mArray.InsertElementAt(aIndex, aElement);
     NS_IF_ADDREF(aElement);
 }
 bool
 nsCOMArray_base::InsertObjectsAt(const nsCOMArray_base& aObjects, int32_t aIndex)
 {
     if ((uint32_t)aIndex > mArray.Length())
         return false;
     if (!mArray.InsertElementsAt(aIndex, aObjects.mArray))
         return false;
     // need to addref all these
     uint32_t count = aObjects.Length();
     for (uint32_t i = 0; i < count; ++i)
         NS_IF_ADDREF(aObjects[i]);
     return true;
 }
 void
 nsCOMArray_base::InsertElementsAt(uint32_t aIndex, const nsCOMArray_base& aElements)
 {
     mArray.InsertElementsAt(aIndex, aElements.mArray);
     // need to addref all these
     uint32_t count = aElements.Length();
     for (uint32_t i = 0; i < count; ++i)
         NS_IF_ADDREF(aElements[i]);
 }
 void
 nsCOMArray_base::InsertElementsAt(uint32_t aIndex, nsISupports* const* aElements, uint32_t aCount)
 {
     mArray.InsertElementsAt(aIndex, aElements, aCount);
     // need to addref all these
     for (uint32_t i = 0; i < aCount; ++i)
         NS_IF_ADDREF(aElements[i]);
 }
 bool
 nsCOMArray_base::ReplaceObjectAt(nsISupports* aObject, int32_t aIndex)
 {
   mArray.EnsureLengthAtLeast(aIndex + 1);
   nsISupports *oldObject = mArray[aIndex];
   // Make sure to addref first, in case aObject == oldObject
   NS_IF_ADDREF(mArray[aIndex] = aObject);
   NS_IF_RELEASE(oldObject);
   // XXX make this return void
   return true;
 }
 bool
 nsCOMArray_base::RemoveObject(nsISupports *aObject)
 {
     bool result = mArray.RemoveElement(aObject);
     if (result)
         NS_IF_RELEASE(aObject);
     return result;
 }
 bool
 nsCOMArray_base::RemoveObjectAt(int32_t aIndex)
 {
     if (uint32_t(aIndex) < mArray.Length()) {
         nsISupports* element = mArray[aIndex];
         mArray.RemoveElementAt(aIndex);
         NS_IF_RELEASE(element);
         return true;
     }
     return false;
 }
 void
 nsCOMArray_base::RemoveElementAt(uint32_t aIndex)
 {
     nsISupports* element = mArray[aIndex];
     mArray.RemoveElementAt(aIndex);
     NS_IF_RELEASE(element);
 }
 bool
 nsCOMArray_base::RemoveObjectsAt(int32_t aIndex, int32_t aCount)
 {
     if (uint32_t(aIndex) + uint32_t(aCount) <= mArray.Length()) {
         nsTArray<nsISupports*> elementsToDestroy(aCount);
         elementsToDestroy.AppendElements(mArray.Elements() + aIndex, aCount);
         mArray.RemoveElementsAt(aIndex, aCount);
         ReleaseObjects(elementsToDestroy);
         return true;
     }
     return false;
 }
 void
 nsCOMArray_base::RemoveElementsAt(uint32_t aIndex, uint32_t aCount)
 {
     nsTArray<nsISupports*> elementsToDestroy(aCount);
     elementsToDestroy.AppendElements(mArray.Elements() + aIndex, aCount);
     mArray.RemoveElementsAt(aIndex, aCount);
     ReleaseObjects(elementsToDestroy);
 }
 // useful for destructors
 void
 ReleaseObjects(nsTArray<nsISupports*> &aArray)
 {
     for (uint32_t i = 0; i < aArray.Length(); i++)
         NS_IF_RELEASE(aArray[i]);
 }
 void
 nsCOMArray_base::Clear()
 {
     nsTArray<nsISupports*> objects;
     objects.SwapElements(mArray);
     ReleaseObjects(objects);
 }
 bool
 nsCOMArray_base::SetCount(int32_t aNewCount)
 {
     NS_ASSERTION(aNewCount >= 0,"SetCount(negative index)");
     if (aNewCount < 0)
         return false;
     int32_t count = mArray.Length();
     if (count > aNewCount)
         RemoveObjectsAt(aNewCount, mArray.Length() - aNewCount);
     mArray.SetLength(aNewCount);
     return true;
 }
 size_t
 nsCOMArray_base::SizeOfExcludingThis(
                    nsBaseArraySizeOfElementIncludingThisFunc aSizeOfElementIncludingThis,
                    mozilla::MallocSizeOf aMallocSizeOf, void* aData) const
 {
     size_t n = mArray.SizeOfExcludingThis(aMallocSizeOf);
     if (aSizeOfElementIncludingThis)
         for (uint32_t index = 0; index < mArray.Length(); index++)
             n += aSizeOfElementIncludingThis(mArray[index], aMallocSizeOf, aData);
     return n;
 }
 void
 nsCOMArray_base::Adopt(nsISupports** aElements, uint32_t aSize)
 {
     Clear();
     mArray.AppendElements(aElements, aSize);
     // Free the allocated array as well.
     NS_Free(aElements);
 }
 uint32_t
 nsCOMArray_base::Forget(nsISupports*** elements)
 {
     uint32_t length = Length();
     size_t array_size = sizeof(nsISupports*) * length;
     nsISupports** array = static_cast<nsISupports**>(NS_Alloc(array_size));
     memmove(array, Elements(), array_size);
     *elements = array;
     // Don't Release the contained pointers; the caller of the method will
     // do this eventually.
     mArray.Clear();
     return length;
 }

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xpcom/glue/nsCOMArray.cpp@6474c204b198 (annotated)

xpcom/glue/nsCOMArray.cpp