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/** @file
A brief file description
@section license License
Licensed to the Apache Software Foundation (ASF) under one
or more contributor license agreements. See the NOTICE file
distributed with this work for additional information
regarding copyright ownership. The ASF licenses this file
to you 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 __INK_POOL_H_INCLUDED__
#define __INK_POOL_H_INCLUDED__
//
// Template of a static size pool of objects.
//
//
template<class C> class InkStaticPool {
public:
InkStaticPool(int size):sz1(size + 1), head(0), tail(0)
{
pool = new C *[sz1];
}
virtual ~ InkStaticPool() {
cleanUp();
delete[]pool;
}
C *get();
bool put(C * newObj);
void put_or_delete(C * newObj)
{
if (!put(newObj))
delete newObj;
}
protected:
void cleanUp(void);
private:
const int sz1;
int head;
int tail;
C **pool;
};
template<class C> inline C * InkStaticPool<C>::get()
{
if (head != tail) {
C *res = pool[head++];
head %= sz1;
return (res);
}
return (NULL);
}
template<class C> inline bool InkStaticPool<C>::put(C * newObj)
{
if (newObj == NULL)
return (false); // cannot put NULL pointer
int newTail = (tail + 1) % sz1;
bool res = (newTail != head);
if (res) {
pool[tail] = newObj;
tail = newTail;
}
return (res);
}
template<class C> inline void InkStaticPool<C>::cleanUp(void)
{
while (true) {
C *tp = get();
if (tp == NULL)
break;
delete tp;
}
}
#endif // #ifndef __INK_POOL_H_INCLUDED__
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