/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ /* vim: set ts=8 sts=4 et sw=4 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/. */ #ifndef HEAPCOPYOFSTACKARRAY_H_ #define HEAPCOPYOFSTACKARRAY_H_ #include "mozilla/Attributes.h" #include "mozilla/UniquePtr.h" #include <string.h> namespace mozilla { // Takes a stack array and copies it into a heap buffer. // Useful to retain the convenience of declaring static arrays, while // avoiding passing stack pointers to the GL (see bug 1005658). template <typename ElemType> class HeapCopyOfStackArray { public: template<size_t N> MOZ_IMPLICIT HeapCopyOfStackArray(ElemType (&array)[N]) : mArrayLength(N) , mArrayData(MakeUnique<ElemType[]>(N)) { memcpy(mArrayData.get(), &array[0], N * sizeof(ElemType)); } ElemType* Data() const { return mArrayData.get(); } size_t ArrayLength() const { return mArrayLength; } size_t ByteLength() const { return mArrayLength * sizeof(ElemType); } private: HeapCopyOfStackArray() = delete; HeapCopyOfStackArray(const HeapCopyOfStackArray&) = delete; const size_t mArrayLength; UniquePtr<ElemType[]> const mArrayData; }; } // namespace mozilla #endif // HEAPCOPYOFSTACKARRAY_H_