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/*
* Copyright 2009, Google Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
// A MemoryBuffer object represents an array of type T.
// Please note that T is really intended to be used
// for integral types (char, int, float, double)
// It's very useful when used as a stack-based object or
// member variable, offering a cleaner, more direct alternative,
// in some cases, to using smart-pointers in conjunction with operator new
//
// Example usage:
//
// MemoryBuffer<int> buffer(1024);
// for (int i = 0; i < 1024; ++i) {
// buffer[i] = i;
// }
#ifndef O3D_IMPORT_CROSS_MEMORY_BUFFER_H_
#define O3D_IMPORT_CROSS_MEMORY_BUFFER_H_
#include <string.h>
#include <stdlib.h>
#include <vector>
#include "base/basictypes.h"
// Allocates an array of type T
template <class T>
class MemoryBuffer {
public:
MemoryBuffer() {};
explicit MemoryBuffer(size_t num_elems) : vector_(num_elems, 0) { }
void Allocate(size_t num_elems) { AllocateClear(num_elems); }
void AllocateClear(size_t num_elems) { vector_.assign(num_elems, 0); }
void Deallocate() { vector_.clear(); }
void Clear() { AllocateClear(vector_.size()); } // sets to all zero values
void Resize(size_t n) { vector_.resize(n); }
size_t GetLength() { return vector_.size(); }
operator T *() { return &vector_[0]; }
private:
std::vector<T> vector_;
DISALLOW_COPY_AND_ASSIGN(MemoryBuffer);
};
#endif // O3D_IMPORT_CROSS_MEMORY_BUFFER_H_
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