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/**
* Copyright (C) 2020-present MongoDB, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the Server Side Public License, version 1,
* as published by MongoDB, Inc.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* Server Side Public License for more details.
*
* You should have received a copy of the Server Side Public License
* along with this program. If not, see
* <http://www.mongodb.com/licensing/server-side-public-license>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the Server Side Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
#include "mongo/platform/basic.h"
#include "mongo/db/client_strand.h"
#include "mongo/logv2/log.h"
#include "mongo/util/concurrency/thread_name.h"
#define MONGO_LOGV2_DEFAULT_COMPONENT ::mongo::logv2::LogComponent::kDefault
namespace mongo {
namespace {
struct ClientStrandData {
ClientStrand* strand = nullptr;
};
auto getClientStrandData = Client::declareDecoration<ClientStrandData>();
} // namespace
boost::intrusive_ptr<ClientStrand> ClientStrand::make(ServiceContext::UniqueClient client) {
auto strand = make_intrusive<ClientStrand>(std::move(client));
getClientStrandData(strand->getClientPointer()).strand = strand.get();
return strand;
}
boost::intrusive_ptr<ClientStrand> ClientStrand::get(Client* client) {
return getClientStrandData(client).strand;
}
void ClientStrand::_setCurrent() noexcept {
invariant(_isBound.load());
invariant(_client);
LOGV2_DEBUG(
5127801, kDiagnosticLogLevel, "Setting the Client", "client"_attr = _client->desc());
// Set the Client for this thread so calls to Client::getCurrent() works as expected.
Client::setCurrent(std::move(_client));
// Set up the thread name.
_oldThreadName = setThreadNameRef(_threadName);
if (_oldThreadName) {
LOGV2_DEBUG(5127802, kDiagnosticLogLevel, "Set thread name", "name"_attr = *_threadName);
}
}
void ClientStrand::_releaseCurrent() noexcept {
invariant(_isBound.load());
invariant(!_client);
// Reclaim the client.
_client = Client::releaseCurrent();
invariant(_client.get() == _clientPtr, kUnableToRecoverClient);
if (_oldThreadName) {
// Reset the last thread name because it was previously set in the OS.
setThreadNameRef(std::move(_oldThreadName));
} else {
// Release the thread name for reuse.
releaseThreadNameRef();
}
LOGV2_DEBUG(
5127803, kDiagnosticLogLevel, "Released the Client", "client"_attr = _client->desc());
}
} // namespace mongo
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