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/*
* Copyright (C) 2006 The Android Open Source Project
*
* 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.
*/
#ifndef SkDeque_DEFINED
#define SkDeque_DEFINED
#include "SkTypes.h"
class SkDeque : SkNoncopyable {
public:
explicit SkDeque(size_t elemSize);
SkDeque(size_t elemSize, void* storage, size_t storageSize);
~SkDeque();
bool empty() const { return 0 == fCount; }
int count() const { return fCount; }
size_t elemSize() const { return fElemSize; }
const void* front() const;
const void* back() const;
void* front() {
return (void*)((const SkDeque*)this)->front();
}
void* back() {
return (void*)((const SkDeque*)this)->back();
}
void* push_front();
void* push_back();
void pop_front();
void pop_back();
private:
struct Head;
public:
class F2BIter {
public:
/**
* Creates an uninitialized iterator. Must be reset()
*/
F2BIter();
F2BIter(const SkDeque& d);
void* next();
void reset(const SkDeque& d);
private:
SkDeque::Head* fHead;
char* fPos;
size_t fElemSize;
};
private:
Head* fFront;
Head* fBack;
size_t fElemSize;
void* fInitialStorage;
int fCount;
friend class Iter;
};
#endif
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