summaryrefslogtreecommitdiffstats
path: root/mfbt/Vector.h
diff options
context:
space:
mode:
Diffstat (limited to 'mfbt/Vector.h')
-rw-r--r--mfbt/Vector.h1491
1 files changed, 1491 insertions, 0 deletions
diff --git a/mfbt/Vector.h b/mfbt/Vector.h
new file mode 100644
index 000000000..fc43afcf1
--- /dev/null
+++ b/mfbt/Vector.h
@@ -0,0 +1,1491 @@
+/* -*- 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/. */
+
+/* A type/length-parametrized vector class. */
+
+#ifndef mozilla_Vector_h
+#define mozilla_Vector_h
+
+#include "mozilla/Alignment.h"
+#include "mozilla/AllocPolicy.h"
+#include "mozilla/ArrayUtils.h" // for PointerRangeSize
+#include "mozilla/Assertions.h"
+#include "mozilla/Attributes.h"
+#include "mozilla/MathAlgorithms.h"
+#include "mozilla/MemoryReporting.h"
+#include "mozilla/Move.h"
+#include "mozilla/OperatorNewExtensions.h"
+#include "mozilla/ReentrancyGuard.h"
+#include "mozilla/TemplateLib.h"
+#include "mozilla/TypeTraits.h"
+
+#include <new> // for placement new
+
+/* Silence dire "bugs in previous versions of MSVC have been fixed" warnings */
+#ifdef _MSC_VER
+#pragma warning(push)
+#pragma warning(disable:4345)
+#endif
+
+namespace mozilla {
+
+template<typename T, size_t N, class AllocPolicy>
+class Vector;
+
+namespace detail {
+
+/*
+ * Check that the given capacity wastes the minimal amount of space if
+ * allocated on the heap. This means that aCapacity*sizeof(T) is as close to a
+ * power-of-two as possible. growStorageBy() is responsible for ensuring this.
+ */
+template<typename T>
+static bool CapacityHasExcessSpace(size_t aCapacity)
+{
+ size_t size = aCapacity * sizeof(T);
+ return RoundUpPow2(size) - size >= sizeof(T);
+}
+
+/*
+ * This template class provides a default implementation for vector operations
+ * when the element type is not known to be a POD, as judged by IsPod.
+ */
+template<typename T, size_t N, class AP, bool IsPod>
+struct VectorImpl
+{
+ /*
+ * Constructs an object in the uninitialized memory at *aDst with aArgs.
+ */
+ template<typename... Args>
+ MOZ_NONNULL(1)
+ static inline void new_(T* aDst, Args&&... aArgs)
+ {
+ new(KnownNotNull, aDst) T(Forward<Args>(aArgs)...);
+ }
+
+ /* Destroys constructed objects in the range [aBegin, aEnd). */
+ static inline void destroy(T* aBegin, T* aEnd)
+ {
+ MOZ_ASSERT(aBegin <= aEnd);
+ for (T* p = aBegin; p < aEnd; ++p) {
+ p->~T();
+ }
+ }
+
+ /* Constructs objects in the uninitialized range [aBegin, aEnd). */
+ static inline void initialize(T* aBegin, T* aEnd)
+ {
+ MOZ_ASSERT(aBegin <= aEnd);
+ for (T* p = aBegin; p < aEnd; ++p) {
+ new_(p);
+ }
+ }
+
+ /*
+ * Copy-constructs objects in the uninitialized range
+ * [aDst, aDst+(aSrcEnd-aSrcStart)) from the range [aSrcStart, aSrcEnd).
+ */
+ template<typename U>
+ static inline void copyConstruct(T* aDst,
+ const U* aSrcStart, const U* aSrcEnd)
+ {
+ MOZ_ASSERT(aSrcStart <= aSrcEnd);
+ for (const U* p = aSrcStart; p < aSrcEnd; ++p, ++aDst) {
+ new_(aDst, *p);
+ }
+ }
+
+ /*
+ * Move-constructs objects in the uninitialized range
+ * [aDst, aDst+(aSrcEnd-aSrcStart)) from the range [aSrcStart, aSrcEnd).
+ */
+ template<typename U>
+ static inline void moveConstruct(T* aDst, U* aSrcStart, U* aSrcEnd)
+ {
+ MOZ_ASSERT(aSrcStart <= aSrcEnd);
+ for (U* p = aSrcStart; p < aSrcEnd; ++p, ++aDst) {
+ new_(aDst, Move(*p));
+ }
+ }
+
+ /*
+ * Copy-constructs objects in the uninitialized range [aDst, aDst+aN) from
+ * the same object aU.
+ */
+ template<typename U>
+ static inline void copyConstructN(T* aDst, size_t aN, const U& aU)
+ {
+ for (T* end = aDst + aN; aDst < end; ++aDst) {
+ new_(aDst, aU);
+ }
+ }
+
+ /*
+ * Grows the given buffer to have capacity aNewCap, preserving the objects
+ * constructed in the range [begin, end) and updating aV. Assumes that (1)
+ * aNewCap has not overflowed, and (2) multiplying aNewCap by sizeof(T) will
+ * not overflow.
+ */
+ static inline MOZ_MUST_USE bool
+ growTo(Vector<T, N, AP>& aV, size_t aNewCap)
+ {
+ MOZ_ASSERT(!aV.usingInlineStorage());
+ MOZ_ASSERT(!CapacityHasExcessSpace<T>(aNewCap));
+ T* newbuf = aV.template pod_malloc<T>(aNewCap);
+ if (MOZ_UNLIKELY(!newbuf)) {
+ return false;
+ }
+ T* dst = newbuf;
+ T* src = aV.beginNoCheck();
+ for (; src < aV.endNoCheck(); ++dst, ++src) {
+ new_(dst, Move(*src));
+ }
+ VectorImpl::destroy(aV.beginNoCheck(), aV.endNoCheck());
+ aV.free_(aV.mBegin);
+ aV.mBegin = newbuf;
+ /* aV.mLength is unchanged. */
+ aV.mCapacity = aNewCap;
+ return true;
+ }
+};
+
+/*
+ * This partial template specialization provides a default implementation for
+ * vector operations when the element type is known to be a POD, as judged by
+ * IsPod.
+ */
+template<typename T, size_t N, class AP>
+struct VectorImpl<T, N, AP, true>
+{
+ template<typename... Args>
+ MOZ_NONNULL(1)
+ static inline void new_(T* aDst, Args&&... aArgs)
+ {
+ // Explicitly construct a local object instead of using a temporary since
+ // T(args...) will be treated like a C-style cast in the unary case and
+ // allow unsafe conversions. Both forms should be equivalent to an
+ // optimizing compiler.
+ T temp(Forward<Args>(aArgs)...);
+ *aDst = temp;
+ }
+
+ static inline void destroy(T*, T*) {}
+
+ static inline void initialize(T* aBegin, T* aEnd)
+ {
+ /*
+ * You would think that memset would be a big win (or even break even)
+ * when we know T is a POD. But currently it's not. This is probably
+ * because |append| tends to be given small ranges and memset requires
+ * a function call that doesn't get inlined.
+ *
+ * memset(aBegin, 0, sizeof(T) * (aEnd - aBegin));
+ */
+ MOZ_ASSERT(aBegin <= aEnd);
+ for (T* p = aBegin; p < aEnd; ++p) {
+ new_(p);
+ }
+ }
+
+ template<typename U>
+ static inline void copyConstruct(T* aDst,
+ const U* aSrcStart, const U* aSrcEnd)
+ {
+ /*
+ * See above memset comment. Also, notice that copyConstruct is
+ * currently templated (T != U), so memcpy won't work without
+ * requiring T == U.
+ *
+ * memcpy(aDst, aSrcStart, sizeof(T) * (aSrcEnd - aSrcStart));
+ */
+ MOZ_ASSERT(aSrcStart <= aSrcEnd);
+ for (const U* p = aSrcStart; p < aSrcEnd; ++p, ++aDst) {
+ new_(aDst, *p);
+ }
+ }
+
+ template<typename U>
+ static inline void moveConstruct(T* aDst,
+ const U* aSrcStart, const U* aSrcEnd)
+ {
+ copyConstruct(aDst, aSrcStart, aSrcEnd);
+ }
+
+ static inline void copyConstructN(T* aDst, size_t aN, const T& aT)
+ {
+ for (T* end = aDst + aN; aDst < end; ++aDst) {
+ new_(aDst, aT);
+ }
+ }
+
+ static inline MOZ_MUST_USE bool
+ growTo(Vector<T, N, AP>& aV, size_t aNewCap)
+ {
+ MOZ_ASSERT(!aV.usingInlineStorage());
+ MOZ_ASSERT(!CapacityHasExcessSpace<T>(aNewCap));
+ T* newbuf = aV.template pod_realloc<T>(aV.mBegin, aV.mCapacity, aNewCap);
+ if (MOZ_UNLIKELY(!newbuf)) {
+ return false;
+ }
+ aV.mBegin = newbuf;
+ /* aV.mLength is unchanged. */
+ aV.mCapacity = aNewCap;
+ return true;
+ }
+
+ static inline void
+ podResizeToFit(Vector<T, N, AP>& aV)
+ {
+ if (aV.usingInlineStorage() || aV.mLength == aV.mCapacity) {
+ return;
+ }
+ T* newbuf = aV.template pod_realloc<T>(aV.mBegin, aV.mCapacity, aV.mLength);
+ if (MOZ_UNLIKELY(!newbuf)) {
+ return;
+ }
+ aV.mBegin = newbuf;
+ aV.mCapacity = aV.mLength;
+ }
+};
+
+// A struct for TestVector.cpp to access private internal fields.
+// DO NOT DEFINE IN YOUR OWN CODE.
+struct VectorTesting;
+
+} // namespace detail
+
+/*
+ * STL-like container providing a short-lived, dynamic buffer. Vector calls the
+ * constructors/destructors of all elements stored in its internal buffer, so
+ * non-PODs may be safely used. Additionally, Vector will store the first N
+ * elements in-place before resorting to dynamic allocation.
+ *
+ * T requirements:
+ * - default and copy constructible, assignable, destructible
+ * - operations do not throw
+ * MinInlineCapacity requirements:
+ * - any value, however, MinInlineCapacity is clamped to min/max values
+ * AllocPolicy:
+ * - see "Allocation policies" in AllocPolicy.h (defaults to
+ * mozilla::MallocAllocPolicy)
+ *
+ * Vector is not reentrant: T member functions called during Vector member
+ * functions must not call back into the same object!
+ */
+template<typename T,
+ size_t MinInlineCapacity = 0,
+ class AllocPolicy = MallocAllocPolicy>
+class Vector final : private AllocPolicy
+{
+ /* utilities */
+
+ static const bool kElemIsPod = IsPod<T>::value;
+ typedef detail::VectorImpl<T, MinInlineCapacity, AllocPolicy, kElemIsPod> Impl;
+ friend struct detail::VectorImpl<T, MinInlineCapacity, AllocPolicy, kElemIsPod>;
+
+ friend struct detail::VectorTesting;
+
+ MOZ_MUST_USE bool growStorageBy(size_t aIncr);
+ MOZ_MUST_USE bool convertToHeapStorage(size_t aNewCap);
+ MOZ_MUST_USE bool maybeCheckSimulatedOOM(size_t aRequestedSize);
+
+ /* magic constants */
+
+ static const int kMaxInlineBytes = 1024;
+
+ /* compute constants */
+
+ /*
+ * Consider element size to be 1 for buffer sizing if there are 0 inline
+ * elements. This allows us to compile when the definition of the element
+ * type is not visible here.
+ *
+ * Explicit specialization is only allowed at namespace scope, so in order
+ * to keep everything here, we use a dummy template parameter with partial
+ * specialization.
+ */
+ template<int M, int Dummy>
+ struct ElemSize
+ {
+ static const size_t value = sizeof(T);
+ };
+ template<int Dummy>
+ struct ElemSize<0, Dummy>
+ {
+ static const size_t value = 1;
+ };
+
+ static const size_t kInlineCapacity =
+ tl::Min<MinInlineCapacity, kMaxInlineBytes / ElemSize<MinInlineCapacity, 0>::value>::value;
+
+ /* Calculate inline buffer size; avoid 0-sized array. */
+ static const size_t kInlineBytes =
+ tl::Max<1, kInlineCapacity * ElemSize<MinInlineCapacity, 0>::value>::value;
+
+ /* member data */
+
+ /*
+ * Pointer to the buffer, be it inline or heap-allocated. Only [mBegin,
+ * mBegin + mLength) hold valid constructed T objects. The range [mBegin +
+ * mLength, mBegin + mCapacity) holds uninitialized memory. The range
+ * [mBegin + mLength, mBegin + mReserved) also holds uninitialized memory
+ * previously allocated by a call to reserve().
+ */
+ T* mBegin;
+
+ /* Number of elements in the vector. */
+ size_t mLength;
+
+ /* Max number of elements storable in the vector without resizing. */
+ size_t mCapacity;
+
+#ifdef DEBUG
+ /* Max elements of reserved or used space in this vector. */
+ size_t mReserved;
+#endif
+
+ /* Memory used for inline storage. */
+ AlignedStorage<kInlineBytes> mStorage;
+
+#ifdef DEBUG
+ friend class ReentrancyGuard;
+ bool mEntered;
+#endif
+
+ /* private accessors */
+
+ bool usingInlineStorage() const
+ {
+ return mBegin == const_cast<Vector*>(this)->inlineStorage();
+ }
+
+ T* inlineStorage()
+ {
+ return static_cast<T*>(mStorage.addr());
+ }
+
+ T* beginNoCheck() const
+ {
+ return mBegin;
+ }
+
+ T* endNoCheck()
+ {
+ return mBegin + mLength;
+ }
+
+ const T* endNoCheck() const
+ {
+ return mBegin + mLength;
+ }
+
+#ifdef DEBUG
+ /**
+ * The amount of explicitly allocated space in this vector that is immediately
+ * available to be filled by appending additional elements. This value is
+ * always greater than or equal to |length()| -- the vector's actual elements
+ * are implicitly reserved. This value is always less than or equal to
+ * |capacity()|. It may be explicitly increased using the |reserve()| method.
+ */
+ size_t reserved() const
+ {
+ MOZ_ASSERT(mLength <= mReserved);
+ MOZ_ASSERT(mReserved <= mCapacity);
+ return mReserved;
+ }
+#endif
+
+ /* Append operations guaranteed to succeed due to pre-reserved space. */
+ template<typename U> void internalAppend(U&& aU);
+ template<typename U, size_t O, class BP>
+ void internalAppendAll(const Vector<U, O, BP>& aU);
+ void internalAppendN(const T& aT, size_t aN);
+ template<typename U> void internalAppend(const U* aBegin, size_t aLength);
+
+public:
+ static const size_t sMaxInlineStorage = MinInlineCapacity;
+
+ typedef T ElementType;
+
+ explicit Vector(AllocPolicy = AllocPolicy());
+ Vector(Vector&&); /* Move constructor. */
+ Vector& operator=(Vector&&); /* Move assignment. */
+ ~Vector();
+
+ /* accessors */
+
+ const AllocPolicy& allocPolicy() const { return *this; }
+
+ AllocPolicy& allocPolicy() { return *this; }
+
+ enum { InlineLength = MinInlineCapacity };
+
+ size_t length() const { return mLength; }
+
+ bool empty() const { return mLength == 0; }
+
+ size_t capacity() const { return mCapacity; }
+
+ T* begin()
+ {
+ MOZ_ASSERT(!mEntered);
+ return mBegin;
+ }
+
+ const T* begin() const
+ {
+ MOZ_ASSERT(!mEntered);
+ return mBegin;
+ }
+
+ T* end()
+ {
+ MOZ_ASSERT(!mEntered);
+ return mBegin + mLength;
+ }
+
+ const T* end() const
+ {
+ MOZ_ASSERT(!mEntered);
+ return mBegin + mLength;
+ }
+
+ T& operator[](size_t aIndex)
+ {
+ MOZ_ASSERT(!mEntered);
+ MOZ_ASSERT(aIndex < mLength);
+ return begin()[aIndex];
+ }
+
+ const T& operator[](size_t aIndex) const
+ {
+ MOZ_ASSERT(!mEntered);
+ MOZ_ASSERT(aIndex < mLength);
+ return begin()[aIndex];
+ }
+
+ T& back()
+ {
+ MOZ_ASSERT(!mEntered);
+ MOZ_ASSERT(!empty());
+ return *(end() - 1);
+ }
+
+ const T& back() const
+ {
+ MOZ_ASSERT(!mEntered);
+ MOZ_ASSERT(!empty());
+ return *(end() - 1);
+ }
+
+ class Range
+ {
+ friend class Vector;
+ T* mCur;
+ T* mEnd;
+ Range(T* aCur, T* aEnd)
+ : mCur(aCur)
+ , mEnd(aEnd)
+ {
+ MOZ_ASSERT(aCur <= aEnd);
+ }
+
+ public:
+ bool empty() const { return mCur == mEnd; }
+ size_t remain() const { return PointerRangeSize(mCur, mEnd); }
+ T& front() const { MOZ_ASSERT(!empty()); return *mCur; }
+ void popFront() { MOZ_ASSERT(!empty()); ++mCur; }
+ T popCopyFront() { MOZ_ASSERT(!empty()); return *mCur++; }
+ };
+
+ class ConstRange
+ {
+ friend class Vector;
+ const T* mCur;
+ const T* mEnd;
+ ConstRange(const T* aCur, const T* aEnd)
+ : mCur(aCur)
+ , mEnd(aEnd)
+ {
+ MOZ_ASSERT(aCur <= aEnd);
+ }
+
+ public:
+ bool empty() const { return mCur == mEnd; }
+ size_t remain() const { return PointerRangeSize(mCur, mEnd); }
+ const T& front() const { MOZ_ASSERT(!empty()); return *mCur; }
+ void popFront() { MOZ_ASSERT(!empty()); ++mCur; }
+ T popCopyFront() { MOZ_ASSERT(!empty()); return *mCur++; }
+ };
+
+ Range all() { return Range(begin(), end()); }
+ ConstRange all() const { return ConstRange(begin(), end()); }
+
+ /* mutators */
+
+ /**
+ * Reverse the order of the elements in the vector in place.
+ */
+ void reverse();
+
+ /**
+ * Given that the vector is empty, grow the internal capacity to |aRequest|,
+ * keeping the length 0.
+ */
+ MOZ_MUST_USE bool initCapacity(size_t aRequest);
+
+ /**
+ * Given that the vector is empty, grow the internal capacity and length to
+ * |aRequest| leaving the elements' memory completely uninitialized (with all
+ * the associated hazards and caveats). This avoids the usual allocation-size
+ * rounding that happens in resize and overhead of initialization for elements
+ * that are about to be overwritten.
+ */
+ MOZ_MUST_USE bool initLengthUninitialized(size_t aRequest);
+
+ /**
+ * If reserve(aRequest) succeeds and |aRequest >= length()|, then appending
+ * |aRequest - length()| elements, in any sequence of append/appendAll calls,
+ * is guaranteed to succeed.
+ *
+ * A request to reserve an amount less than the current length does not affect
+ * reserved space.
+ */
+ MOZ_MUST_USE bool reserve(size_t aRequest);
+
+ /**
+ * Destroy elements in the range [end() - aIncr, end()). Does not deallocate
+ * or unreserve storage for those elements.
+ */
+ void shrinkBy(size_t aIncr);
+
+ /**
+ * Destroy elements in the range [aNewLength, end()). Does not deallocate
+ * or unreserve storage for those elements.
+ */
+ void shrinkTo(size_t aNewLength);
+
+ /** Grow the vector by aIncr elements. */
+ MOZ_MUST_USE bool growBy(size_t aIncr);
+
+ /** Call shrinkBy or growBy based on whether newSize > length(). */
+ MOZ_MUST_USE bool resize(size_t aNewLength);
+
+ /**
+ * Increase the length of the vector, but don't initialize the new elements
+ * -- leave them as uninitialized memory.
+ */
+ MOZ_MUST_USE bool growByUninitialized(size_t aIncr);
+ void infallibleGrowByUninitialized(size_t aIncr);
+ MOZ_MUST_USE bool resizeUninitialized(size_t aNewLength);
+
+ /** Shorthand for shrinkBy(length()). */
+ void clear();
+
+ /** Clears and releases any heap-allocated storage. */
+ void clearAndFree();
+
+ /**
+ * Calls the AllocPolicy's pod_realloc to release excess capacity. Since
+ * realloc is only safe on PODs, this method fails to compile if IsPod<T>
+ * is false.
+ */
+ void podResizeToFit();
+
+ /**
+ * If true, appending |aNeeded| elements won't reallocate elements storage.
+ * This *doesn't* mean that infallibleAppend may be used! You still must
+ * reserve the extra space, even if this method indicates that appends won't
+ * need to reallocate elements storage.
+ */
+ bool canAppendWithoutRealloc(size_t aNeeded) const;
+
+ /** Potentially fallible append operations. */
+
+ /**
+ * This can take either a T& or a T&&. Given a T&&, it moves |aU| into the
+ * vector, instead of copying it. If it fails, |aU| is left unmoved. ("We are
+ * not amused.")
+ */
+ template<typename U> MOZ_MUST_USE bool append(U&& aU);
+
+ /**
+ * Construct a T in-place as a new entry at the end of this vector.
+ */
+ template<typename... Args>
+ MOZ_MUST_USE bool emplaceBack(Args&&... aArgs)
+ {
+ if (!growByUninitialized(1))
+ return false;
+ Impl::new_(&back(), Forward<Args>(aArgs)...);
+ return true;
+ }
+
+ template<typename U, size_t O, class BP>
+ MOZ_MUST_USE bool appendAll(const Vector<U, O, BP>& aU);
+ MOZ_MUST_USE bool appendN(const T& aT, size_t aN);
+ template<typename U> MOZ_MUST_USE bool append(const U* aBegin, const U* aEnd);
+ template<typename U> MOZ_MUST_USE bool append(const U* aBegin, size_t aLength);
+
+ /*
+ * Guaranteed-infallible append operations for use upon vectors whose
+ * memory has been pre-reserved. Don't use this if you haven't reserved the
+ * memory!
+ */
+ template<typename U> void infallibleAppend(U&& aU)
+ {
+ internalAppend(Forward<U>(aU));
+ }
+ void infallibleAppendN(const T& aT, size_t aN)
+ {
+ internalAppendN(aT, aN);
+ }
+ template<typename U> void infallibleAppend(const U* aBegin, const U* aEnd)
+ {
+ internalAppend(aBegin, PointerRangeSize(aBegin, aEnd));
+ }
+ template<typename U> void infallibleAppend(const U* aBegin, size_t aLength)
+ {
+ internalAppend(aBegin, aLength);
+ }
+ template<typename... Args>
+ void infallibleEmplaceBack(Args&&... aArgs)
+ {
+ infallibleGrowByUninitialized(1);
+ Impl::new_(&back(), Forward<Args>(aArgs)...);
+ }
+
+ void popBack();
+
+ T popCopy();
+
+ /**
+ * If elements are stored in-place, return nullptr and leave this vector
+ * unmodified.
+ *
+ * Otherwise return this vector's elements buffer, and clear this vector as if
+ * by clearAndFree(). The caller now owns the buffer and is responsible for
+ * deallocating it consistent with this vector's AllocPolicy.
+ *
+ * N.B. Although a T*, only the range [0, length()) is constructed.
+ */
+ MOZ_MUST_USE T* extractRawBuffer();
+
+ /**
+ * If elements are stored in-place, allocate a new buffer, move this vector's
+ * elements into it, and return that buffer.
+ *
+ * Otherwise return this vector's elements buffer. The caller now owns the
+ * buffer and is responsible for deallocating it consistent with this vector's
+ * AllocPolicy.
+ *
+ * This vector is cleared, as if by clearAndFree(), when this method
+ * succeeds. This method fails and returns nullptr only if new elements buffer
+ * allocation fails.
+ *
+ * N.B. Only the range [0, length()) of the returned buffer is constructed.
+ * If any of these elements are uninitialized (as growByUninitialized
+ * enables), behavior is undefined.
+ */
+ MOZ_MUST_USE T* extractOrCopyRawBuffer();
+
+ /**
+ * Transfer ownership of an array of objects into the vector. The caller
+ * must have allocated the array in accordance with this vector's
+ * AllocPolicy.
+ *
+ * N.B. This call assumes that there are no uninitialized elements in the
+ * passed array.
+ */
+ void replaceRawBuffer(T* aP, size_t aLength);
+
+ /**
+ * Places |aVal| at position |aP|, shifting existing elements from |aP| onward
+ * one position higher. On success, |aP| should not be reused because it'll
+ * be a dangling pointer if reallocation of the vector storage occurred; the
+ * return value should be used instead. On failure, nullptr is returned.
+ *
+ * Example usage:
+ *
+ * if (!(p = vec.insert(p, val))) {
+ * <handle failure>
+ * }
+ * <keep working with p>
+ *
+ * This is inherently a linear-time operation. Be careful!
+ */
+ template<typename U>
+ MOZ_MUST_USE T* insert(T* aP, U&& aVal);
+
+ /**
+ * Removes the element |aT|, which must fall in the bounds [begin, end),
+ * shifting existing elements from |aT + 1| onward one position lower.
+ */
+ void erase(T* aT);
+
+ /**
+ * Removes the elements [|aBegin|, |aEnd|), which must fall in the bounds
+ * [begin, end), shifting existing elements from |aEnd + 1| onward to aBegin's
+ * old position.
+ */
+ void erase(T* aBegin, T* aEnd);
+
+ /**
+ * Measure the size of the vector's heap-allocated storage.
+ */
+ size_t sizeOfExcludingThis(MallocSizeOf aMallocSizeOf) const;
+
+ /**
+ * Like sizeOfExcludingThis, but also measures the size of the vector
+ * object (which must be heap-allocated) itself.
+ */
+ size_t sizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const;
+
+ void swap(Vector& aOther);
+
+private:
+ Vector(const Vector&) = delete;
+ void operator=(const Vector&) = delete;
+};
+
+/* This does the re-entrancy check plus several other sanity checks. */
+#define MOZ_REENTRANCY_GUARD_ET_AL \
+ ReentrancyGuard g(*this); \
+ MOZ_ASSERT_IF(usingInlineStorage(), mCapacity == kInlineCapacity); \
+ MOZ_ASSERT(reserved() <= mCapacity); \
+ MOZ_ASSERT(mLength <= reserved()); \
+ MOZ_ASSERT(mLength <= mCapacity)
+
+/* Vector Implementation */
+
+template<typename T, size_t N, class AP>
+MOZ_ALWAYS_INLINE
+Vector<T, N, AP>::Vector(AP aAP)
+ : AP(aAP)
+ , mLength(0)
+ , mCapacity(kInlineCapacity)
+#ifdef DEBUG
+ , mReserved(0)
+ , mEntered(false)
+#endif
+{
+ mBegin = static_cast<T*>(mStorage.addr());
+}
+
+/* Move constructor. */
+template<typename T, size_t N, class AllocPolicy>
+MOZ_ALWAYS_INLINE
+Vector<T, N, AllocPolicy>::Vector(Vector&& aRhs)
+ : AllocPolicy(Move(aRhs))
+#ifdef DEBUG
+ , mEntered(false)
+#endif
+{
+ mLength = aRhs.mLength;
+ mCapacity = aRhs.mCapacity;
+#ifdef DEBUG
+ mReserved = aRhs.mReserved;
+#endif
+
+ if (aRhs.usingInlineStorage()) {
+ /* We can't move the buffer over in this case, so copy elements. */
+ mBegin = static_cast<T*>(mStorage.addr());
+ Impl::moveConstruct(mBegin, aRhs.beginNoCheck(), aRhs.endNoCheck());
+ /*
+ * Leave aRhs's mLength, mBegin, mCapacity, and mReserved as they are.
+ * The elements in its in-line storage still need to be destroyed.
+ */
+ } else {
+ /*
+ * Take src's buffer, and turn src into an empty vector using
+ * in-line storage.
+ */
+ mBegin = aRhs.mBegin;
+ aRhs.mBegin = static_cast<T*>(aRhs.mStorage.addr());
+ aRhs.mCapacity = kInlineCapacity;
+ aRhs.mLength = 0;
+#ifdef DEBUG
+ aRhs.mReserved = 0;
+#endif
+ }
+}
+
+/* Move assignment. */
+template<typename T, size_t N, class AP>
+MOZ_ALWAYS_INLINE Vector<T, N, AP>&
+Vector<T, N, AP>::operator=(Vector&& aRhs)
+{
+ MOZ_ASSERT(this != &aRhs, "self-move assignment is prohibited");
+ this->~Vector();
+ new(KnownNotNull, this) Vector(Move(aRhs));
+ return *this;
+}
+
+template<typename T, size_t N, class AP>
+MOZ_ALWAYS_INLINE
+Vector<T, N, AP>::~Vector()
+{
+ MOZ_REENTRANCY_GUARD_ET_AL;
+ Impl::destroy(beginNoCheck(), endNoCheck());
+ if (!usingInlineStorage()) {
+ this->free_(beginNoCheck());
+ }
+}
+
+template<typename T, size_t N, class AP>
+MOZ_ALWAYS_INLINE void
+Vector<T, N, AP>::reverse() {
+ MOZ_REENTRANCY_GUARD_ET_AL;
+ T* elems = mBegin;
+ size_t len = mLength;
+ size_t mid = len / 2;
+ for (size_t i = 0; i < mid; i++) {
+ Swap(elems[i], elems[len - i - 1]);
+ }
+}
+
+/*
+ * This function will create a new heap buffer with capacity aNewCap,
+ * move all elements in the inline buffer to this new buffer,
+ * and fail on OOM.
+ */
+template<typename T, size_t N, class AP>
+inline bool
+Vector<T, N, AP>::convertToHeapStorage(size_t aNewCap)
+{
+ MOZ_ASSERT(usingInlineStorage());
+
+ /* Allocate buffer. */
+ MOZ_ASSERT(!detail::CapacityHasExcessSpace<T>(aNewCap));
+ T* newBuf = this->template pod_malloc<T>(aNewCap);
+ if (MOZ_UNLIKELY(!newBuf)) {
+ return false;
+ }
+
+ /* Copy inline elements into heap buffer. */
+ Impl::moveConstruct(newBuf, beginNoCheck(), endNoCheck());
+ Impl::destroy(beginNoCheck(), endNoCheck());
+
+ /* Switch in heap buffer. */
+ mBegin = newBuf;
+ /* mLength is unchanged. */
+ mCapacity = aNewCap;
+ return true;
+}
+
+template<typename T, size_t N, class AP>
+MOZ_NEVER_INLINE bool
+Vector<T, N, AP>::growStorageBy(size_t aIncr)
+{
+ MOZ_ASSERT(mLength + aIncr > mCapacity);
+
+ /*
+ * When choosing a new capacity, its size should is as close to 2**N bytes
+ * as possible. 2**N-sized requests are best because they are unlikely to
+ * be rounded up by the allocator. Asking for a 2**N number of elements
+ * isn't as good, because if sizeof(T) is not a power-of-two that would
+ * result in a non-2**N request size.
+ */
+
+ size_t newCap;
+
+ if (aIncr == 1) {
+ if (usingInlineStorage()) {
+ /* This case occurs in ~70--80% of the calls to this function. */
+ size_t newSize =
+ tl::RoundUpPow2<(kInlineCapacity + 1) * sizeof(T)>::value;
+ newCap = newSize / sizeof(T);
+ goto convert;
+ }
+
+ if (mLength == 0) {
+ /* This case occurs in ~0--10% of the calls to this function. */
+ newCap = 1;
+ goto grow;
+ }
+
+ /* This case occurs in ~15--20% of the calls to this function. */
+
+ /*
+ * Will mLength * 4 *sizeof(T) overflow? This condition limits a vector
+ * to 1GB of memory on a 32-bit system, which is a reasonable limit. It
+ * also ensures that
+ *
+ * static_cast<char*>(end()) - static_cast<char*>(begin())
+ *
+ * doesn't overflow ptrdiff_t (see bug 510319).
+ */
+ if (MOZ_UNLIKELY(mLength & tl::MulOverflowMask<4 * sizeof(T)>::value)) {
+ this->reportAllocOverflow();
+ return false;
+ }
+
+ /*
+ * If we reach here, the existing capacity will have a size that is already
+ * as close to 2^N as sizeof(T) will allow. Just double the capacity, and
+ * then there might be space for one more element.
+ */
+ newCap = mLength * 2;
+ if (detail::CapacityHasExcessSpace<T>(newCap)) {
+ newCap += 1;
+ }
+ } else {
+ /* This case occurs in ~2% of the calls to this function. */
+ size_t newMinCap = mLength + aIncr;
+
+ /* Did mLength + aIncr overflow? Will newCap * sizeof(T) overflow? */
+ if (MOZ_UNLIKELY(newMinCap < mLength ||
+ newMinCap & tl::MulOverflowMask<2 * sizeof(T)>::value))
+ {
+ this->reportAllocOverflow();
+ return false;
+ }
+
+ size_t newMinSize = newMinCap * sizeof(T);
+ size_t newSize = RoundUpPow2(newMinSize);
+ newCap = newSize / sizeof(T);
+ }
+
+ if (usingInlineStorage()) {
+convert:
+ return convertToHeapStorage(newCap);
+ }
+
+grow:
+ return Impl::growTo(*this, newCap);
+}
+
+template<typename T, size_t N, class AP>
+inline bool
+Vector<T, N, AP>::initCapacity(size_t aRequest)
+{
+ MOZ_ASSERT(empty());
+ MOZ_ASSERT(usingInlineStorage());
+ if (aRequest == 0) {
+ return true;
+ }
+ T* newbuf = this->template pod_malloc<T>(aRequest);
+ if (MOZ_UNLIKELY(!newbuf)) {
+ return false;
+ }
+ mBegin = newbuf;
+ mCapacity = aRequest;
+#ifdef DEBUG
+ mReserved = aRequest;
+#endif
+ return true;
+}
+
+template<typename T, size_t N, class AP>
+inline bool
+Vector<T, N, AP>::initLengthUninitialized(size_t aRequest)
+{
+ if (!initCapacity(aRequest)) {
+ return false;
+ }
+ infallibleGrowByUninitialized(aRequest);
+ return true;
+}
+
+template<typename T, size_t N, class AP>
+inline bool
+Vector<T, N, AP>::maybeCheckSimulatedOOM(size_t aRequestedSize)
+{
+ if (aRequestedSize <= N) {
+ return true;
+ }
+
+#ifdef DEBUG
+ if (aRequestedSize <= mReserved) {
+ return true;
+ }
+#endif
+
+ return allocPolicy().checkSimulatedOOM();
+}
+
+template<typename T, size_t N, class AP>
+inline bool
+Vector<T, N, AP>::reserve(size_t aRequest)
+{
+ MOZ_REENTRANCY_GUARD_ET_AL;
+ if (aRequest > mCapacity) {
+ if (MOZ_UNLIKELY(!growStorageBy(aRequest - mLength))) {
+ return false;
+ }
+ } else if (!maybeCheckSimulatedOOM(aRequest)) {
+ return false;
+ }
+#ifdef DEBUG
+ if (aRequest > mReserved) {
+ mReserved = aRequest;
+ }
+ MOZ_ASSERT(mLength <= mReserved);
+ MOZ_ASSERT(mReserved <= mCapacity);
+#endif
+ return true;
+}
+
+template<typename T, size_t N, class AP>
+inline void
+Vector<T, N, AP>::shrinkBy(size_t aIncr)
+{
+ MOZ_REENTRANCY_GUARD_ET_AL;
+ MOZ_ASSERT(aIncr <= mLength);
+ Impl::destroy(endNoCheck() - aIncr, endNoCheck());
+ mLength -= aIncr;
+}
+
+template<typename T, size_t N, class AP>
+MOZ_ALWAYS_INLINE void
+Vector<T, N, AP>::shrinkTo(size_t aNewLength)
+{
+ MOZ_ASSERT(aNewLength <= mLength);
+ shrinkBy(mLength - aNewLength);
+}
+
+template<typename T, size_t N, class AP>
+MOZ_ALWAYS_INLINE bool
+Vector<T, N, AP>::growBy(size_t aIncr)
+{
+ MOZ_REENTRANCY_GUARD_ET_AL;
+ if (aIncr > mCapacity - mLength) {
+ if (MOZ_UNLIKELY(!growStorageBy(aIncr))) {
+ return false;
+ }
+ } else if (!maybeCheckSimulatedOOM(mLength + aIncr)) {
+ return false;
+ }
+ MOZ_ASSERT(mLength + aIncr <= mCapacity);
+ T* newend = endNoCheck() + aIncr;
+ Impl::initialize(endNoCheck(), newend);
+ mLength += aIncr;
+#ifdef DEBUG
+ if (mLength > mReserved) {
+ mReserved = mLength;
+ }
+#endif
+ return true;
+}
+
+template<typename T, size_t N, class AP>
+MOZ_ALWAYS_INLINE bool
+Vector<T, N, AP>::growByUninitialized(size_t aIncr)
+{
+ MOZ_REENTRANCY_GUARD_ET_AL;
+ if (aIncr > mCapacity - mLength) {
+ if (MOZ_UNLIKELY(!growStorageBy(aIncr))) {
+ return false;
+ }
+ } else if (!maybeCheckSimulatedOOM(mLength + aIncr)) {
+ return false;
+ }
+#ifdef DEBUG
+ if (mLength + aIncr > mReserved) {
+ mReserved = mLength + aIncr;
+ }
+#endif
+ infallibleGrowByUninitialized(aIncr);
+ return true;
+}
+
+template<typename T, size_t N, class AP>
+MOZ_ALWAYS_INLINE void
+Vector<T, N, AP>::infallibleGrowByUninitialized(size_t aIncr)
+{
+ MOZ_ASSERT(mLength + aIncr <= reserved());
+ mLength += aIncr;
+}
+
+template<typename T, size_t N, class AP>
+inline bool
+Vector<T, N, AP>::resize(size_t aNewLength)
+{
+ size_t curLength = mLength;
+ if (aNewLength > curLength) {
+ return growBy(aNewLength - curLength);
+ }
+ shrinkBy(curLength - aNewLength);
+ return true;
+}
+
+template<typename T, size_t N, class AP>
+MOZ_ALWAYS_INLINE bool
+Vector<T, N, AP>::resizeUninitialized(size_t aNewLength)
+{
+ size_t curLength = mLength;
+ if (aNewLength > curLength) {
+ return growByUninitialized(aNewLength - curLength);
+ }
+ shrinkBy(curLength - aNewLength);
+ return true;
+}
+
+template<typename T, size_t N, class AP>
+inline void
+Vector<T, N, AP>::clear()
+{
+ MOZ_REENTRANCY_GUARD_ET_AL;
+ Impl::destroy(beginNoCheck(), endNoCheck());
+ mLength = 0;
+}
+
+template<typename T, size_t N, class AP>
+inline void
+Vector<T, N, AP>::clearAndFree()
+{
+ clear();
+
+ if (usingInlineStorage()) {
+ return;
+ }
+ this->free_(beginNoCheck());
+ mBegin = static_cast<T*>(mStorage.addr());
+ mCapacity = kInlineCapacity;
+#ifdef DEBUG
+ mReserved = 0;
+#endif
+}
+
+template<typename T, size_t N, class AP>
+inline void
+Vector<T, N, AP>::podResizeToFit()
+{
+ // This function is only defined if IsPod is true and will fail to compile
+ // otherwise.
+ Impl::podResizeToFit(*this);
+}
+
+template<typename T, size_t N, class AP>
+inline bool
+Vector<T, N, AP>::canAppendWithoutRealloc(size_t aNeeded) const
+{
+ return mLength + aNeeded <= mCapacity;
+}
+
+template<typename T, size_t N, class AP>
+template<typename U, size_t O, class BP>
+MOZ_ALWAYS_INLINE void
+Vector<T, N, AP>::internalAppendAll(const Vector<U, O, BP>& aOther)
+{
+ internalAppend(aOther.begin(), aOther.length());
+}
+
+template<typename T, size_t N, class AP>
+template<typename U>
+MOZ_ALWAYS_INLINE void
+Vector<T, N, AP>::internalAppend(U&& aU)
+{
+ MOZ_ASSERT(mLength + 1 <= mReserved);
+ MOZ_ASSERT(mReserved <= mCapacity);
+ Impl::new_(endNoCheck(), Forward<U>(aU));
+ ++mLength;
+}
+
+template<typename T, size_t N, class AP>
+MOZ_ALWAYS_INLINE bool
+Vector<T, N, AP>::appendN(const T& aT, size_t aNeeded)
+{
+ MOZ_REENTRANCY_GUARD_ET_AL;
+ if (mLength + aNeeded > mCapacity) {
+ if (MOZ_UNLIKELY(!growStorageBy(aNeeded))) {
+ return false;
+ }
+ } else if (!maybeCheckSimulatedOOM(mLength + aNeeded)) {
+ return false;
+ }
+#ifdef DEBUG
+ if (mLength + aNeeded > mReserved) {
+ mReserved = mLength + aNeeded;
+ }
+#endif
+ internalAppendN(aT, aNeeded);
+ return true;
+}
+
+template<typename T, size_t N, class AP>
+MOZ_ALWAYS_INLINE void
+Vector<T, N, AP>::internalAppendN(const T& aT, size_t aNeeded)
+{
+ MOZ_ASSERT(mLength + aNeeded <= mReserved);
+ MOZ_ASSERT(mReserved <= mCapacity);
+ Impl::copyConstructN(endNoCheck(), aNeeded, aT);
+ mLength += aNeeded;
+}
+
+template<typename T, size_t N, class AP>
+template<typename U>
+inline T*
+Vector<T, N, AP>::insert(T* aP, U&& aVal)
+{
+ MOZ_ASSERT(begin() <= aP);
+ MOZ_ASSERT(aP <= end());
+ size_t pos = aP - begin();
+ MOZ_ASSERT(pos <= mLength);
+ size_t oldLength = mLength;
+ if (pos == oldLength) {
+ if (!append(Forward<U>(aVal))) {
+ return nullptr;
+ }
+ } else {
+ T oldBack = Move(back());
+ if (!append(Move(oldBack))) { /* Dup the last element. */
+ return nullptr;
+ }
+ for (size_t i = oldLength; i > pos; --i) {
+ (*this)[i] = Move((*this)[i - 1]);
+ }
+ (*this)[pos] = Forward<U>(aVal);
+ }
+ return begin() + pos;
+}
+
+template<typename T, size_t N, class AP>
+inline void
+Vector<T, N, AP>::erase(T* aIt)
+{
+ MOZ_ASSERT(begin() <= aIt);
+ MOZ_ASSERT(aIt < end());
+ while (aIt + 1 < end()) {
+ *aIt = Move(*(aIt + 1));
+ ++aIt;
+ }
+ popBack();
+}
+
+template<typename T, size_t N, class AP>
+inline void
+Vector<T, N, AP>::erase(T* aBegin, T* aEnd)
+{
+ MOZ_ASSERT(begin() <= aBegin);
+ MOZ_ASSERT(aBegin <= aEnd);
+ MOZ_ASSERT(aEnd <= end());
+ while (aEnd < end()) {
+ *aBegin++ = Move(*aEnd++);
+ }
+ shrinkBy(aEnd - aBegin);
+}
+
+template<typename T, size_t N, class AP>
+template<typename U>
+MOZ_ALWAYS_INLINE bool
+Vector<T, N, AP>::append(const U* aInsBegin, const U* aInsEnd)
+{
+ MOZ_REENTRANCY_GUARD_ET_AL;
+ size_t aNeeded = PointerRangeSize(aInsBegin, aInsEnd);
+ if (mLength + aNeeded > mCapacity) {
+ if (MOZ_UNLIKELY(!growStorageBy(aNeeded))) {
+ return false;
+ }
+ } else if (!maybeCheckSimulatedOOM(mLength + aNeeded)) {
+ return false;
+ }
+#ifdef DEBUG
+ if (mLength + aNeeded > mReserved) {
+ mReserved = mLength + aNeeded;
+ }
+#endif
+ internalAppend(aInsBegin, aNeeded);
+ return true;
+}
+
+template<typename T, size_t N, class AP>
+template<typename U>
+MOZ_ALWAYS_INLINE void
+Vector<T, N, AP>::internalAppend(const U* aInsBegin, size_t aInsLength)
+{
+ MOZ_ASSERT(mLength + aInsLength <= mReserved);
+ MOZ_ASSERT(mReserved <= mCapacity);
+ Impl::copyConstruct(endNoCheck(), aInsBegin, aInsBegin + aInsLength);
+ mLength += aInsLength;
+}
+
+template<typename T, size_t N, class AP>
+template<typename U>
+MOZ_ALWAYS_INLINE bool
+Vector<T, N, AP>::append(U&& aU)
+{
+ MOZ_REENTRANCY_GUARD_ET_AL;
+ if (mLength == mCapacity) {
+ if (MOZ_UNLIKELY(!growStorageBy(1))) {
+ return false;
+ }
+ } else if (!maybeCheckSimulatedOOM(mLength + 1)) {
+ return false;
+ }
+#ifdef DEBUG
+ if (mLength + 1 > mReserved) {
+ mReserved = mLength + 1;
+ }
+#endif
+ internalAppend(Forward<U>(aU));
+ return true;
+}
+
+template<typename T, size_t N, class AP>
+template<typename U, size_t O, class BP>
+MOZ_ALWAYS_INLINE bool
+Vector<T, N, AP>::appendAll(const Vector<U, O, BP>& aOther)
+{
+ return append(aOther.begin(), aOther.length());
+}
+
+template<typename T, size_t N, class AP>
+template<class U>
+MOZ_ALWAYS_INLINE bool
+Vector<T, N, AP>::append(const U* aInsBegin, size_t aInsLength)
+{
+ return append(aInsBegin, aInsBegin + aInsLength);
+}
+
+template<typename T, size_t N, class AP>
+MOZ_ALWAYS_INLINE void
+Vector<T, N, AP>::popBack()
+{
+ MOZ_REENTRANCY_GUARD_ET_AL;
+ MOZ_ASSERT(!empty());
+ --mLength;
+ endNoCheck()->~T();
+}
+
+template<typename T, size_t N, class AP>
+MOZ_ALWAYS_INLINE T
+Vector<T, N, AP>::popCopy()
+{
+ T ret = back();
+ popBack();
+ return ret;
+}
+
+template<typename T, size_t N, class AP>
+inline T*
+Vector<T, N, AP>::extractRawBuffer()
+{
+ MOZ_REENTRANCY_GUARD_ET_AL;
+
+ if (usingInlineStorage()) {
+ return nullptr;
+ }
+
+ T* ret = mBegin;
+ mBegin = static_cast<T*>(mStorage.addr());
+ mLength = 0;
+ mCapacity = kInlineCapacity;
+#ifdef DEBUG
+ mReserved = 0;
+#endif
+ return ret;
+}
+
+template<typename T, size_t N, class AP>
+inline T*
+Vector<T, N, AP>::extractOrCopyRawBuffer()
+{
+ if (T* ret = extractRawBuffer()) {
+ return ret;
+ }
+
+ MOZ_REENTRANCY_GUARD_ET_AL;
+
+ T* copy = this->template pod_malloc<T>(mLength);
+ if (!copy) {
+ return nullptr;
+ }
+
+ Impl::moveConstruct(copy, beginNoCheck(), endNoCheck());
+ Impl::destroy(beginNoCheck(), endNoCheck());
+ mBegin = static_cast<T*>(mStorage.addr());
+ mLength = 0;
+ mCapacity = kInlineCapacity;
+#ifdef DEBUG
+ mReserved = 0;
+#endif
+ return copy;
+}
+
+template<typename T, size_t N, class AP>
+inline void
+Vector<T, N, AP>::replaceRawBuffer(T* aP, size_t aLength)
+{
+ MOZ_REENTRANCY_GUARD_ET_AL;
+
+ /* Destroy what we have. */
+ Impl::destroy(beginNoCheck(), endNoCheck());
+ if (!usingInlineStorage()) {
+ this->free_(beginNoCheck());
+ }
+
+ /* Take in the new buffer. */
+ if (aLength <= kInlineCapacity) {
+ /*
+ * We convert to inline storage if possible, even though aP might
+ * otherwise be acceptable. Maybe this behaviour should be
+ * specifiable with an argument to this function.
+ */
+ mBegin = static_cast<T*>(mStorage.addr());
+ mLength = aLength;
+ mCapacity = kInlineCapacity;
+ Impl::moveConstruct(mBegin, aP, aP + aLength);
+ Impl::destroy(aP, aP + aLength);
+ this->free_(aP);
+ } else {
+ mBegin = aP;
+ mLength = aLength;
+ mCapacity = aLength;
+ }
+#ifdef DEBUG
+ mReserved = aLength;
+#endif
+}
+
+template<typename T, size_t N, class AP>
+inline size_t
+Vector<T, N, AP>::sizeOfExcludingThis(MallocSizeOf aMallocSizeOf) const
+{
+ return usingInlineStorage() ? 0 : aMallocSizeOf(beginNoCheck());
+}
+
+template<typename T, size_t N, class AP>
+inline size_t
+Vector<T, N, AP>::sizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const
+{
+ return aMallocSizeOf(this) + sizeOfExcludingThis(aMallocSizeOf);
+}
+
+template<typename T, size_t N, class AP>
+inline void
+Vector<T, N, AP>::swap(Vector& aOther)
+{
+ static_assert(N == 0,
+ "still need to implement this for N != 0");
+
+ // This only works when inline storage is always empty.
+ if (!usingInlineStorage() && aOther.usingInlineStorage()) {
+ aOther.mBegin = mBegin;
+ mBegin = inlineStorage();
+ } else if (usingInlineStorage() && !aOther.usingInlineStorage()) {
+ mBegin = aOther.mBegin;
+ aOther.mBegin = aOther.inlineStorage();
+ } else if (!usingInlineStorage() && !aOther.usingInlineStorage()) {
+ Swap(mBegin, aOther.mBegin);
+ } else {
+ // This case is a no-op, since we'd set both to use their inline storage.
+ }
+
+ Swap(mLength, aOther.mLength);
+ Swap(mCapacity, aOther.mCapacity);
+#ifdef DEBUG
+ Swap(mReserved, aOther.mReserved);
+#endif
+}
+
+} // namespace mozilla
+
+#ifdef _MSC_VER
+#pragma warning(pop)
+#endif
+
+#endif /* mozilla_Vector_h */