gfx/2d/StackArray.h
author Sebastian Hengst <archaeopteryx@coole-files.de>
Mon, 22 Oct 2018 16:33:06 +0300
changeset 442291 c44fbdd5173548c9035256dda8fd3512f67118a8
parent 389027 5f74d262924171a8fa0b4483a64f4cac34c4c9b8
child 448947 6f3709b3878117466168c40affa7bca0b60cf75b
permissions -rw-r--r--
Bug 1496764 - Disable browser_UsageTelemetry_searchbar.js until telemetry probe has been extended to fix permafail on version increase. a=version-increase-fix

/* -*- 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 handy class that will allocate data for size*T objects on the stack and
 * otherwise allocate them on the heap. It is similar in purpose to AutoTArray */

template <class T, size_t size>
class StackArray
{
public:
  explicit StackArray(size_t count) {
    if (count > size) {
      mData = new T[count];
    } else {
      mData = mStackData;
    }
  }
  ~StackArray() {
    if (mData != mStackData) {
      delete[] mData;
    }
  }
  T& operator[](size_t n) { return mData[n]; }
  const T& operator[](size_t n) const { return mData[n]; }
  T* data() { return mData; };
private:
  T mStackData[size];
  T* mData;
};