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/***************************************************************************
* lib/io/serving_request.cpp
*
* Part of the STXXL. See http://stxxl.sourceforge.net
*
* Copyright (C) 2002 Roman Dementiev <dementiev@mpi-sb.mpg.de>
* Copyright (C) 2008 Andreas Beckmann <beckmann@cs.uni-frankfurt.de>
*
* 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 <stxxl/bits/common/exceptions.h>
#include <stxxl/bits/common/state.h>
#include <stxxl/bits/io/file.h>
#include <stxxl/bits/io/request_interface.h>
#include <stxxl/bits/io/request_with_state.h>
#include <stxxl/bits/io/serving_request.h>
#include <stxxl/bits/namespace.h>
#include <stxxl/bits/verbose.h>
#include <iomanip>
STXXL_BEGIN_NAMESPACE
serving_request::serving_request(
const completion_handler& on_cmpl,
file* f,
void* buf,
offset_type off,
size_type b,
request_type t)
: request_with_state(on_cmpl, f, buf, off, b, t)
{
#ifdef STXXL_CHECK_BLOCK_ALIGNING
// Direct I/O requires file system block size alignment for file offsets,
// memory buffer addresses, and transfer(buffer) size must be multiple
// of the file system block size
check_alignment();
#endif
}
void serving_request::serve()
{
check_nref();
STXXL_VERBOSE2_THIS(
"serving_request::serve(): " <<
m_buffer << " @ [" <<
m_file << "|" << m_file->get_allocator_id() << "]0x" <<
std::hex << std::setfill('0') << std::setw(8) <<
m_offset << "/0x" << m_bytes <<
((m_type == request::READ) ? " READ" : " WRITE"));
try
{
m_file->serve(m_buffer, m_offset, m_bytes, m_type);
}
catch (const io_error& ex)
{
error_occured(ex.what());
}
check_nref(true);
completed(false);
}
const char* serving_request::io_type() const
{
return m_file->io_type();
}
STXXL_END_NAMESPACE
// vim: et:ts=4:sw=4
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