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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 00:47:55 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 00:47:55 +0000
commit26a029d407be480d791972afb5975cf62c9360a6 (patch)
treef435a8308119effd964b339f76abb83a57c29483 /xpcom/ds/nsCOMArray.cpp
parentInitial commit. (diff)
downloadfirefox-26a029d407be480d791972afb5975cf62c9360a6.tar.xz
firefox-26a029d407be480d791972afb5975cf62c9360a6.zip
Adding upstream version 124.0.1.upstream/124.0.1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'xpcom/ds/nsCOMArray.cpp')
-rw-r--r--xpcom/ds/nsCOMArray.cpp235
1 files changed, 235 insertions, 0 deletions
diff --git a/xpcom/ds/nsCOMArray.cpp b/xpcom/ds/nsCOMArray.cpp
new file mode 100644
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+++ b/xpcom/ds/nsCOMArray.cpp
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+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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 "mozilla/OperatorNewExtensions.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* aE) {
+ new (mozilla::KnownNotNull, static_cast<void*>(aE)) E();
+ }
+ // Invoke the copy-constructor in place.
+ template <class A>
+ static inline void Construct(E* aE, const A& aArg) {
+ new (mozilla::KnownNotNull, static_cast<void*>(aE)) E(aArg);
+ }
+ // Construct in place.
+ template <class... Args>
+ static inline void Emplace(E* aE, Args&&... aArgs) {
+ new (mozilla::KnownNotNull, static_cast<void*>(aE))
+ E(std::forward<Args>(aArgs)...);
+ }
+ // Invoke the destructor in place.
+ static inline void Destruct(E* aE) { aE->~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;
+}
+
+bool nsCOMArray_base::InsertObjectAt(nsISupports* aObject, int32_t aIndex) {
+ if ((uint32_t)aIndex > mArray.Length()) {
+ return false;
+ }
+
+ mArray.InsertElementAt(aIndex, aObject);
+
+ NS_IF_ADDREF(aObject);
+ return true;
+}
+
+void nsCOMArray_base::InsertElementAt(uint32_t aIndex, nsISupports* aElement) {
+ mArray.InsertElementAt(aIndex, aElement);
+ NS_IF_ADDREF(aElement);
+}
+
+void nsCOMArray_base::InsertElementAt(uint32_t aIndex,
+ already_AddRefed<nsISupports> aElement) {
+ mArray.InsertElementAt(aIndex, aElement.take());
+}
+
+bool nsCOMArray_base::InsertObjectsAt(const nsCOMArray_base& aObjects,
+ int32_t aIndex) {
+ if ((uint32_t)aIndex > mArray.Length()) {
+ return false;
+ }
+
+ mArray.InsertElementsAt(aIndex, aObjects.mArray);
+
+ // 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]);
+ }
+}
+
+void 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);
+}
+
+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 = std::move(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;
+}