StackArray.h (1066B)
1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ 2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */ 3 /* This Source Code Form is subject to the terms of the Mozilla Public 4 * License, v. 2.0. If a copy of the MPL was not distributed with this 5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ 6 7 /* A handy class that will allocate data for size*T objects on the stack and 8 * otherwise allocate them on the heap. It is similar in purpose to AutoTArray 9 */ 10 11 #ifndef MOZILLA_GFX_STACKARRAY_H_ 12 #define MOZILLA_GFX_STACKARRAY_H_ 13 14 template <class T, size_t size> 15 class StackArray final { 16 public: 17 explicit StackArray(size_t count) { 18 if (count > size) { 19 mData = new T[count]; 20 } else { 21 mData = mStackData; 22 } 23 } 24 ~StackArray() { 25 if (mData != mStackData) { 26 delete[] mData; 27 } 28 } 29 T& operator[](size_t n) { return mData[n]; } 30 const T& operator[](size_t n) const { return mData[n]; } 31 T* data() { return mData; }; 32 33 private: 34 T mStackData[size]; 35 T* mData; 36 }; 37 38 #endif // MOZILLA_GFX_STACKARRAY_H_