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/**
* @copyright
* ====================================================================
* 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.
* ====================================================================
* @endcopyright
*/
#ifndef SVN_CXXHL_PRIVATE_APRWRAP_POOL_H
#define SVN_CXXHL_PRIVATE_APRWRAP_POOL_H
#include <cstdlib>
#include "svncxxhl/exception.hpp"
#include "svncxxhl/_compat.hpp"
#include "svn_pools.h"
#undef TRUE
#undef FALSE
namespace apache {
namespace subversion {
namespace cxxhl {
namespace apr {
// Forward declaration
class IterationPool;
/**
* Encapsulates an APR pool.
*/
class Pool : compat::noncopyable
{
public:
/**
* Create a pool as a child of the applications' root pool.
*/
Pool()
: m_pool(svn_pool_create(get_root_pool()))
{}
/**
* Create a pool as a child of @a parent.
*/
explicit Pool(Pool* parent) throw()
: m_pool(svn_pool_create(parent->m_pool))
{}
/**
* Destroy the pool.
*/
~Pool() throw()
{
svn_pool_destroy(m_pool);
}
/**
* Clear the pool.
*/
void clear() throw()
{
apr_pool_clear(m_pool);
}
/**
* Retuurn a pool pointer that can be used by the C APIs.
*/
apr_pool_t* get() const throw()
{
return m_pool;
}
/**
* Allocate space for @a count elements of type @a T from the pool.
* The contents of the allocated buffer will contain unspecified data.
*/
template<typename T>
T* alloc(std::size_t count) throw()
{
return static_cast<T*>(apr_palloc(m_pool, count * sizeof(T)));
}
/**
* Allocate space for @a count elements of type @a T from the pool.
* The contents of the allocated buffer will be initialized to zero.
*/
template<typename T>
T* allocz(std::size_t count) throw()
{
return static_cast<T*>(apr_pcalloc(m_pool, count * sizeof(T)));
}
private:
static apr_pool_t* get_root_pool();
apr_pool_t* const m_pool;
public:
/**
* Pool proxy used for iteration scratch pools.
*
* Construct this object inside a loop body in order to clear the
* proxied pool on every iteration.
*/
class Iteration : compat::noncopyable
{
public:
/**
* The constructor clears the proxied pool.
*/
explicit Iteration(IterationPool& iterbase) throw();
/**
* Returns a reference to the proxied pool.
*/
Pool& pool() const throw()
{
return m_pool;
}
/**
* Proxy method for Pool::get
*/
apr_pool_t* get() const throw()
{
return m_pool.get();
}
/**
* Proxy method for Pool::alloc
*/
template<typename T>
T* alloc(std::size_t count) throw()
{
return m_pool.alloc<T>(count);
}
/**
* Proxy method for Pool::allocz
*/
template<typename T>
T* allocz(std::size_t count) throw()
{
return m_pool.allocz<T>(count);
}
private:
Pool& m_pool;
};
};
/**
* Pool wrapper that hides the pool implementation, except for construction.
*
* Construct this object outside a loop body, then within the body,
* use Pool::Iteration to access the wrapped pool.
*/
class IterationPool : compat::noncopyable
{
public:
IterationPool() {}
explicit IterationPool(Pool* parent) throw()
: m_pool(parent)
{}
private:
friend class Pool::Iteration;
Pool m_pool;
};
// Pool::Iteration constructor implementation
inline Pool::Iteration::Iteration(IterationPool& iterbase) throw()
: m_pool(iterbase.m_pool)
{
m_pool.clear();
}
} // namespace apr
} // namespace cxxhl
} // namespace subversion
} // namespace apache
#endif // SVN_CXXHL_PRIVATE_APRWRAP_POOL_H
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