From 6bf0a5cb5034a7e684dcc3500e841785237ce2dd Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 19:32:43 +0200 Subject: Adding upstream version 1:115.7.0. Signed-off-by: Daniel Baumann --- gfx/gl/HeapCopyOfStackArray.h | 44 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 44 insertions(+) create mode 100644 gfx/gl/HeapCopyOfStackArray.h (limited to 'gfx/gl/HeapCopyOfStackArray.h') diff --git a/gfx/gl/HeapCopyOfStackArray.h b/gfx/gl/HeapCopyOfStackArray.h new file mode 100644 index 0000000000..ffcadde461 --- /dev/null +++ b/gfx/gl/HeapCopyOfStackArray.h @@ -0,0 +1,44 @@ +/* -*- 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/. */ + +#ifndef HEAPCOPYOFSTACKARRAY_H_ +#define HEAPCOPYOFSTACKARRAY_H_ + +#include "mozilla/Attributes.h" +#include "mozilla/UniquePtr.h" + +#include + +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 +class HeapCopyOfStackArray { + public: + template + MOZ_IMPLICIT HeapCopyOfStackArray(const ElemType (&array)[N]) + : mArrayLength(N), mArrayData(MakeUnique(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 const mArrayData; +}; + +} // namespace mozilla + +#endif // HEAPCOPYOFSTACKARRAY_H_ -- cgit v1.2.3