/*
   Copyright 2013 Google Inc.

   Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
   You may obtain a copy of the License at

        http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.
*/

// A convenient wrapper for buffers with alignment constraints

// Note that if we were on C++11, we'd use aligned_storage or somesuch.

#ifndef __ALIGNED_BUF_H
#define __ALIGNED_BUF_H

#include<stddef.h>

template<typename T, size_t size, size_t alignment = 16>
class AlignedBuf {
  public:
    T *get() {
      return (T *)((((intptr_t)storage_) + alignment - 1) & -alignment);
    }
  private:
    unsigned char storage_[size * sizeof(T) + alignment];
};

#endif  // __ALIGNED_BUF_H