/
identifier_collector.h
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/
identifier_collector.h
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// Copyright (c) 2013, Cornell University
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// * Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
// * Neither the name of HyperDex nor the names of its contributors may be
// used to endorse or promote products derived from this software without
// specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
#ifndef hyperdex_daemon_identifier_collector_h_
#define hyperdex_daemon_identifier_collector_h_
// e
#include <e/ao_hash_map.h>
#include <e/compat.h>
#include <e/seqno_collector.h>
// HyperDex
#include "namespace.h"
#include "common/ids.h"
BEGIN_HYPERDEX_NAMESPACE
class identifier_collector
{
public:
identifier_collector(e::garbage_collector* gc);
~identifier_collector() throw ();
// concurrent methods
// these methods return "true" if ri is a managed region_id, else "false"
public:
// force the lower bound for "ri" to be "lb" or more
// equivalent to calling collect on 0 through lb - 1
void bump(const region_id& ri, uint64_t lb);
// mark the identifier as collected
void collect(const region_id& ri, uint64_t id);
// store a value in "*lb" such that ids "< *lb" have been collected
uint64_t lower_bound(const region_id& ri);
// external synchronization required; nothing can call other methods
public:
void adopt(region_id* ris, size_t ris_sz);
private:
identifier_collector(const identifier_collector&);
identifier_collector& operator = (const identifier_collector&);
static uint64_t id(region_id ri) { return ri.get(); }
private:
const static region_id defaultri;
typedef e::ao_hash_map<region_id, e::compat::shared_ptr<e::seqno_collector>, id, defaultri> collector_map_t;
e::garbage_collector* m_gc;
collector_map_t m_collectors;
};
END_HYPERDEX_NAMESPACE
#endif // hyperdex_daemon_identifier_collector_h_