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/**
* Copyright (C) 2018-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/transport/session.h"
#include "mongo/platform/atomic_word.h"
#include "mongo/transport/transport_layer.h"
#include "mongo/util/net/ssl_types.h"
namespace mongo {
namespace transport {
namespace {
AtomicWord<unsigned long long> sessionIdCounter(0);
} // namespace
Session::Session() : _id(sessionIdCounter.addAndFetch(1)), _tags(kPending) {}
void Session::setTags(TagMask tagsToSet) {
mutateTags([tagsToSet](TagMask originalTags) { return (originalTags | tagsToSet); });
}
void Session::unsetTags(TagMask tagsToUnset) {
mutateTags([tagsToUnset](TagMask originalTags) { return (originalTags & ~tagsToUnset); });
}
void Session::mutateTags(const stdx::function<TagMask(TagMask)>& mutateFunc) {
TagMask oldValue, newValue;
do {
oldValue = _tags.load();
newValue = mutateFunc(oldValue);
// Any change to the session tags automatically clears kPending status.
newValue &= ~kPending;
} while (_tags.compareAndSwap(oldValue, newValue) != oldValue);
}
Session::TagMask Session::getTags() const {
return _tags.load();
}
} // namespace transport
} // namespace mongo
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