mirror of
https://github.com/matrix-construct/construct
synced 2024-06-28 23:08:20 +02:00
134 lines
2.5 KiB
C++
134 lines
2.5 KiB
C++
// Matrix Construct
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//
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// Copyright (C) Matrix Construct Developers, Authors & Contributors
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// Copyright (C) 2016-2018 Jason Volk <jason@zemos.net>
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//
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// Permission to use, copy, modify, and/or distribute this software for any
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// purpose with or without fee is hereby granted, provided that the above
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// copyright notice and this permission notice is present in all copies. The
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// full license for this software is available in the LICENSE file.
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using namespace ircd;
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mapi::header
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IRCD_MODULE
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{
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"Matrix state library; modular components."
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};
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namespace ircd::m::state
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{
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extern "C" void ircd__m__state__clear(void);
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extern "C" size_t ircd__m__state__gc(void);
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}
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size_t
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ircd::m::state::ircd__m__state__gc()
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{
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std::set<id_buffer> heads;
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{
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const db::gopts opts{db::get::NO_CACHE};
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//opts.readahead = 4_MiB;
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db::column &column{m::dbs::room_events};
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for(auto it(column.begin(opts)); it; ++it)
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{
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const auto &root(it->second);
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id_buffer buf;
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copy(buf, root);
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heads.emplace(buf);
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}
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}
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std::set<id_buffer> active;
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for(auto it(begin(heads)); it != end(heads); it = heads.erase(it))
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{
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const auto &root(*it);
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std::cout << "root: " << string_view{root} << std::endl;
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state::for_each(root, state::iter_bool_closure{[&active]
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(const json::array &key, const string_view &val)
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{
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std::cout << "key: " << key << std::endl;
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std::cout << "val: " << val << std::endl;
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return true;
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}});
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break;
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}
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/*
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static const db::gopts opts
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{
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db::get::NO_CACHE
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};
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auto &column{m::dbs::state_node};
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for(auto it(column.begin(opts)); it; ++it)
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{
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id_buffer buf;
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const auto &root(it->second);
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copy(buf, root);
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active.emplace(buf);
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}
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*/
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size_t ret(active.size());
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return ret;
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}
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void
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ircd::m::state::ircd__m__state__clear()
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{
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auto &column
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{
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m::dbs::state_node
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};
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// Find the key range for the column. The key is copied here so we don't
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// hold an iterator on it and prevent its demise.
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std::pair<std::string, std::string> range;
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{
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const auto front
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{
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column.begin()
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};
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const auto back
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{
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column.rbegin()
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};
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// If these iterators are invalid there is nothing to delete
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if(!front || !back)
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return;
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range =
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{
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front->first, back->first
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};
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};
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db::txn txn
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{
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*m::dbs::events
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};
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db::txn::append
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{
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txn, column, db::column::delta
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{
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db::op::DELETE_RANGE, range.first, range.second
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}
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};
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// DELETE_RANGE second key is exclusive and won't be included in the
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// range so we have to add a single delete for it.
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db::txn::append
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{
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txn, column, db::column::delta
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{
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db::op::DELETE, range.second
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}
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};
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txn();
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}
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