mng/test_prefetch_pool.cpp

/***************************************************************************
 * mng/test_prefetch_pool.cpp
 *
 * Part of the STXXL. See http://stxxl.sourceforge.net
 *
 * Copyright (C) 2003 Roman Dementiev <[email protected]>
 * Copyright (C) 2009 Andreas Beckmann <[email protected]>
 *
 * Distributed under the Boost Software License, Version 1.0.
 * (See accompanying file LICENSE_1_0.txt or copy at
 * http://www.boost.org/LICENSE_1_0.txt)
 **************************************************************************/


#include <iostream>
#include <stxxl/mng>
#include <stxxl/bits/mng/prefetch_pool.h>

#define BLOCK_SIZE (1024 * 512)

struct MyType
{
 int integer;
 char chars[5];
};

typedef stxxl::typed_block<BLOCK_SIZE, MyType> block_type;

int main()
{
 stxxl::prefetch_pool<block_type> pool(2);
 pool.resize(10);
 pool.resize(5);

 block_type * blk = new block_type;
 (*blk)[0].integer = 42;
 block_type::bid_type bids[2];
 stxxl::block_manager::get_instance()->new_blocks(stxxl::single_disk(), bids, bids + 2);
 blk->write(bids[0])->wait();
 blk->write(bids[1])->wait();

 pool.hint(bids[0]);
 pool.read(blk, bids[0])->wait();
 pool.read(blk, bids[1])->wait();

 delete blk;
}