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// Copyright 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CC_SCOPED_PTR_DEQUE_H_
#define CC_SCOPED_PTR_DEQUE_H_
#include "base/basictypes.h"
#include "base/logging.h"
#include "base/memory/scoped_ptr.h"
#include "base/stl_util.h"
#include <deque>
namespace cc {
// This type acts like a deque<scoped_ptr> based on top of std::deque. The
// ScopedPtrDeque has ownership of all elements in the deque.
template <typename T>
class ScopedPtrDeque {
public:
typedef typename std::deque<T*>::iterator iterator;
typedef typename std::deque<T*>::const_iterator const_iterator;
typedef typename std::deque<T*>::reverse_iterator reverse_iterator;
typedef typename std::deque<T*>::const_reverse_iterator const_reverse_iterator;
ScopedPtrDeque() {}
~ScopedPtrDeque() { clear(); }
size_t size() const {
return data_.size();
}
T* Peek(size_t index) const {
DCHECK(index < size());
return data_[index];
}
T* operator[](size_t index) const {
return Peek(index);
}
T* first() const {
DCHECK(!isEmpty());
return Peek(0);
}
T* last() const {
DCHECK(!isEmpty());
return Peek(size() - 1);
}
bool isEmpty() const {
return size() == 0;
}
scoped_ptr<T> takeFirst() {
scoped_ptr<T> ret(first());
data_.pop_front();
return ret.Pass();
}
scoped_ptr<T> takeLast() {
scoped_ptr<T> ret(last());
data_.pop_back();
return ret.Pass();
}
void clear() {
STLDeleteElements(&data_);
}
void append(scoped_ptr<T> item) {
data_.push_back(item.release());
}
void insert(size_t index, scoped_ptr<T> item) {
DCHECK(index < size());
data_.insert(data_.begin() + index, item.release());
}
iterator begin() { return data_.begin(); }
const_iterator begin() const { return data_.begin(); }
iterator end() { return data_.end(); }
const_iterator end() const { return data_.end(); }
reverse_iterator rbegin() { return data_.rbegin(); }
const_reverse_iterator rbegin() const { return data_.rbegin(); }
reverse_iterator rend() { return data_.rend(); }
const_reverse_iterator rend() const { return data_.rend(); }
private:
std::deque<T*> data_;
DISALLOW_COPY_AND_ASSIGN(ScopedPtrDeque);
};
} // namespace cc
#endif // CC_SCOPED_PTR_DEQUE_H_
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