2013-04-19 02:52:48 +00:00
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////////////////////////////////////////////////////////////////////////////////////////
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// RAVEN STANDARD TEMPLATE LIBRARY
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// (c) 2002 Activision
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//
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//
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// Queue Template
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// --------------
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// The queue is a circular buffer of objects which supports a push at the "front" and a
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// pop at the "back". Therefore it is:
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//
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// First In, First Out
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//
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// As the pointers to the push and pop locations are changed it wrapps around the end
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// of the array and back to the front. There are asserts to make sure it never goes
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// beyond the capacity of the object.
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//
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//
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//
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// NOTES:
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//
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//
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//
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////////////////////////////////////////////////////////////////////////////////////////
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#if !defined(RATL_QUEUE_VS_INC)
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#define RATL_QUEUE_VS_INC
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////////////////////////////////////////////////////////////////////////////////////////
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// Includes
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////////////////////////////////////////////////////////////////////////////////////////
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#if !defined(RATL_COMMON_INC)
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#include "ratl_common.h"
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#endif
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namespace ratl
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{
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////////////////////////////////////////////////////////////////////////////////////////
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// The Queue Class
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////////////////////////////////////////////////////////////////////////////////////////
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template <class T>
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class queue_base : public ratl_base
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{
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public:
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2013-04-21 05:00:23 +00:00
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typedef T TStorageTraits;
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2013-04-19 02:52:48 +00:00
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typedef typename T::TValue TTValue;
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////////////////////////////////////////////////////////////////////////////////////
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// Capacity Enum
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////////////////////////////////////////////////////////////////////////////////////
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enum
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{
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CAPACITY = T::CAPACITY
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};
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private:
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////////////////////////////////////////////////////////////////////////////////////
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// Data
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////////////////////////////////////////////////////////////////////////////////////
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array_base<TStorageTraits> mData; // The Memory
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int mPush; // Address Of Next Add Location
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int mPop; // Address Of Next Remove Location
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int mSize;
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int push_low()
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{
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assert(size()<CAPACITY);
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// Add It
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//--------
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mPush++;
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mSize++;
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// Update Push Location
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//----------------------
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if (mPush>=CAPACITY)
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{
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mPush=0;
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return CAPACITY-1;
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}
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return mPush-1;
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}
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public:
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////////////////////////////////////////////////////////////////////////////////////
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// Constructor
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////////////////////////////////////////////////////////////////////////////////////
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queue_base() : mPush(0), mPop(0), mSize(0)
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{
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}
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////////////////////////////////////////////////////////////////////////////////////
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// Get The Size (The Difference Between The Push And Pop "Pointers")
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////////////////////////////////////////////////////////////////////////////////////
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int size() const
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{
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return mSize;
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}
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////////////////////////////////////////////////////////////////////////////////////
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// Check To See If The Size Is Zero
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////////////////////////////////////////////////////////////////////////////////////
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bool empty() const
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{
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return !mSize;
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}
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////////////////////////////////////////////////////////////////////////////////////
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// Check To See If The Size Is Full
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////////////////////////////////////////////////////////////////////////////////////
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bool full() const
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{
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return mSize>=CAPACITY;
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}
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////////////////////////////////////////////////////////////////////////////////////
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// Empty Out The Entire Queue
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////////////////////////////////////////////////////////////////////////////////////
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void clear()
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{
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mPush = 0;
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mPop = 0;
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mSize = 0;
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mData.clear();
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}
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////////////////////////////////////////////////////////////////////////////////////
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// Add A Value, returns a reference to the value in place
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////////////////////////////////////////////////////////////////////////////////////
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TTValue & push()
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{
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int idx=push_low();
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mData.construct(idx);
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return mData[idx];
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}
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////////////////////////////////////////////////////////////////////////////////////
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// Add A Value to the Queue
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////////////////////////////////////////////////////////////////////////////////////
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void push(const TTValue& v)
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{
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mData.construct(push_low(),v);
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}
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////////////////////////////////////////////////////////////////////////////////////
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// Add A Value to the Queue, returning a void * to the memory
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////////////////////////////////////////////////////////////////////////////////////
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TRatlNew *push_raw()
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{
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return mData.alloc_raw(push_low());
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}
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////////////////////////////////////////////////////////////////////////////////////
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// Remove A Value From The Queue
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////////////////////////////////////////////////////////////////////////////////////
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void pop()
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{
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assert(size()>0);
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mData.destruct(mPop);
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// Update Pop Location
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//---------------------
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mPop++;
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if (mPop>=CAPACITY)
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{
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mPop=0;
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}
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mSize--;
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}
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TTValue & top()
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{
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assert(size()>0);
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return mData[mPop];
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}
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const TTValue & top() const
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{
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assert(size()>0);
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return mData[mPop];
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}
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template<class CAST_TO>
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CAST_TO *verify_alloc(CAST_TO *p) const
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{
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return mData.verify_alloc(p);
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}
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};
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template<class T, int ARG_CAPACITY>
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class queue_vs : public queue_base<storage::value_semantics<T,ARG_CAPACITY> >
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{
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public:
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typedef typename storage::value_semantics<T,ARG_CAPACITY> TStorageTraits;
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typedef typename TStorageTraits::TValue TTValue;
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enum
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{
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CAPACITY = ARG_CAPACITY
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};
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queue_vs() {}
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};
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template<class T, int ARG_CAPACITY>
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class queue_os : public queue_base<storage::object_semantics<T,ARG_CAPACITY> >
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{
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public:
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typedef typename storage::object_semantics<T,ARG_CAPACITY> TStorageTraits;
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typedef typename TStorageTraits::TValue TTValue;
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enum
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{
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CAPACITY = ARG_CAPACITY
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};
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queue_os() {}
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};
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template<class T, int ARG_CAPACITY, int ARG_MAX_CLASS_SIZE>
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class queue_is : public queue_base<storage::virtual_semantics<T,ARG_CAPACITY,ARG_MAX_CLASS_SIZE> >
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{
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public:
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typedef typename storage::virtual_semantics<T,ARG_CAPACITY,ARG_MAX_CLASS_SIZE> TStorageTraits;
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typedef typename TStorageTraits::TValue TTValue;
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enum
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{
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CAPACITY = ARG_CAPACITY,
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MAX_CLASS_SIZE = ARG_MAX_CLASS_SIZE
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};
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queue_is() {}
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};
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}
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2013-04-04 22:35:38 +00:00
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|
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#endif
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