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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