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/*
*
* 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.
*
*/
/**
* \file pmgr.cpp
*
* Qpid asynchronous store plugin library
*
* File containing code for class mrg::journal::pmgr (page manager). See
* comments in file pmgr.h for details.
*
* \author Kim van der Riet
*/
#include "qpid/legacystore/jrnl/pmgr.h"
#include <cerrno>
#include <cstdlib>
#include <cstring>
#include "qpid/legacystore/jrnl/jcfg.h"
#include "qpid/legacystore/jrnl/jcntl.h"
#include "qpid/legacystore/jrnl/jerrno.h"
#include <sstream>
namespace mrg
{
namespace journal
{
pmgr::page_cb::page_cb(u_int16_t index):
_index(index),
_state(UNUSED),
_wdblks(0),
_rdblks(0),
_pdtokl(0),
_wfh(0),
_rfh(0),
_pbuff(0)
{}
const char*
pmgr::page_cb::state_str() const
{
switch(_state)
{
case UNUSED:
return "UNUSED";
case IN_USE:
return "IN_USE";
case AIO_PENDING:
return "AIO_PENDING";
case AIO_COMPLETE:
return "AIO_COMPLETE";
}
return "<unknown>";
}
const u_int32_t pmgr::_sblksize = JRNL_SBLK_SIZE * JRNL_DBLK_SIZE;
pmgr::pmgr(jcntl* jc, enq_map& emap, txn_map& tmap):
_cache_pgsize_sblks(0),
_cache_num_pages(0),
_jc(jc),
_emap(emap),
_tmap(tmap),
_page_base_ptr(0),
_page_ptr_arr(0),
_page_cb_arr(0),
_aio_cb_arr(0),
_aio_event_arr(0),
_ioctx(0),
_pg_index(0),
_pg_cntr(0),
_pg_offset_dblks(0),
_aio_evt_rem(0),
_cbp(0),
_enq_rec(),
_deq_rec(),
_txn_rec()
{}
pmgr::~pmgr()
{
pmgr::clean();
}
void
pmgr::initialize(aio_callback* const cbp, const u_int32_t cache_pgsize_sblks, const u_int16_t cache_num_pages)
{
// As static use of this class keeps old values around, clean up first...
pmgr::clean();
_pg_index = 0;
_pg_cntr = 0;
_pg_offset_dblks = 0;
_aio_evt_rem = 0;
_cache_pgsize_sblks = cache_pgsize_sblks;
_cache_num_pages = cache_num_pages;
_cbp = cbp;
// 1. Allocate page memory (as a single block)
std::size_t cache_pgsize = _cache_num_pages * _cache_pgsize_sblks * _sblksize;
if (::posix_memalign(&_page_base_ptr, _sblksize, cache_pgsize))
{
clean();
std::ostringstream oss;
oss << "posix_memalign(): blksize=" << _sblksize << " size=" << cache_pgsize;
oss << FORMAT_SYSERR(errno);
throw jexception(jerrno::JERR__MALLOC, oss.str(), "pmgr", "initialize");
}
// 2. Allocate array of page pointers
_page_ptr_arr = (void**)std::malloc(_cache_num_pages * sizeof(void*));
MALLOC_CHK(_page_ptr_arr, "_page_ptr_arr", "pmgr", "initialize");
// 3. Allocate and initilaize page control block (page_cb) array
_page_cb_arr = (page_cb*)std::malloc(_cache_num_pages * sizeof(page_cb));
MALLOC_CHK(_page_cb_arr, "_page_cb_arr", "pmgr", "initialize");
std::memset(_page_cb_arr, 0, _cache_num_pages * sizeof(page_cb));
// 5. Allocate IO control block (iocb) array
_aio_cb_arr = (aio_cb*)std::malloc(_cache_num_pages * sizeof(aio_cb));
MALLOC_CHK(_aio_cb_arr, "_aio_cb_arr", "pmgr", "initialize");
// 6. Set page pointers in _page_ptr_arr, _page_cb_arr and iocbs to pages within page block
for (u_int16_t i=0; i<_cache_num_pages; i++)
{
_page_ptr_arr[i] = (void*)((char*)_page_base_ptr + _cache_pgsize_sblks * _sblksize * i);
_page_cb_arr[i]._index = i;
_page_cb_arr[i]._state = UNUSED;
_page_cb_arr[i]._pbuff = _page_ptr_arr[i];
_page_cb_arr[i]._pdtokl = new std::deque<data_tok*>;
_page_cb_arr[i]._pdtokl->clear();
_aio_cb_arr[i].data = (void*)&_page_cb_arr[i];
}
// 7. Allocate io_event array, max one event per cache page plus one for each file
const u_int16_t max_aio_evts = _cache_num_pages + _jc->num_jfiles();
_aio_event_arr = (aio_event*)std::malloc(max_aio_evts * sizeof(aio_event));
MALLOC_CHK(_aio_event_arr, "_aio_event_arr", "pmgr", "initialize");
// 8. Initialize AIO context
if (int ret = aio::queue_init(max_aio_evts, &_ioctx))
{
std::ostringstream oss;
oss << "io_queue_init() failed: " << FORMAT_SYSERR(-ret);
throw jexception(jerrno::JERR__AIO, oss.str(), "pmgr", "initialize");
}
}
void
pmgr::clean()
{
// clean up allocated memory here
if (_ioctx)
aio::queue_release(_ioctx);
std::free(_page_base_ptr);
_page_base_ptr = 0;
if (_page_cb_arr)
{
for (int i=0; i<_cache_num_pages; i++)
delete _page_cb_arr[i]._pdtokl;
std::free(_page_ptr_arr);
_page_ptr_arr = 0;
}
std::free(_page_cb_arr);
_page_cb_arr = 0;
std::free(_aio_cb_arr);
_aio_cb_arr = 0;
std::free(_aio_event_arr);
_aio_event_arr = 0;
}
const char*
pmgr::page_state_str(page_state ps)
{
switch (ps)
{
case UNUSED:
return "UNUSED";
case IN_USE:
return "IN_USE";
case AIO_PENDING:
return "AIO_PENDING";
case AIO_COMPLETE:
return "AIO_COMPLETE";
}
return "<page_state unknown>";
}
} // namespace journal
} // namespace mrg
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