//
// mp::mt_source
//
// Copyright (C) 2008 FURUHASHI Sadayuki
//
//    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 MP_MT_SOURCE_IMPL_H__
#define MP_MT_SOURCE_IMPL_H__

namespace mp {

template <size_t EstimatedAllocationSize, size_t OptimalLotsInChunk>
mt_source<EstimatedAllocationSize, OptimalLotsInChunk>::mt_source() { }

template <size_t EstimatedAllocationSize, size_t OptimalLotsInChunk>
mt_source<EstimatedAllocationSize, OptimalLotsInChunk>::~mt_source() { }

template <size_t EstimatedAllocationSize, size_t OptimalLotsInChunk>
void* mt_source<EstimatedAllocationSize, OptimalLotsInChunk>::malloc(size_t sz)
{
	char* bf = (char*)m_src.malloc(sz);
	bf[0] = 1;
	try {
		mark(bf);
	} catch(...) {
		m_src.free(bf);
		throw std::bad_alloc();
	}
	return (void*)(bf+1);
}

template <size_t EstimatedAllocationSize, size_t OptimalLotsInChunk>
void mt_source<EstimatedAllocationSize, OptimalLotsInChunk>::mark(char* bf)
{
	for(blocks_t::iterator it(m_blocks.begin()), it_end(m_blocks.end());
			it != it_end;
			++it) {
		if(!*it) {
			*it = bf;
			return;
		}
	}
	m_blocks.push_back(bf);
}

template <size_t EstimatedAllocationSize, size_t OptimalLotsInChunk>
void mt_source<EstimatedAllocationSize, OptimalLotsInChunk>::collect()
{
	for(blocks_t::iterator it(m_blocks.begin()), it_end(m_blocks.end());
			it != it_end;
			++it) {
		if(*it && **it == 0) {
			m_src.free((void*)*it);
			*it = NULL;
		}
	}
}

template <size_t EstimatedAllocationSize, size_t OptimalLotsInChunk>
void mt_source<EstimatedAllocationSize, OptimalLotsInChunk>::free(void* x)
{
	char* bf = ((char*)x) - 1;
	*bf = 0;
}


}  // namespace mp

#endif /* mp/mt_source.h */