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// Copyright (C) MongoDB, Inc. 2017-present.
//
// Licensed 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
package session
import (
"sync"
"go.mongodb.org/mongo-driver/bson"
)
// ClusterClock represents a logical clock for keeping track of cluster time.
type ClusterClock struct {
clusterTime bson.Raw
lock sync.Mutex
}
// GetClusterTime returns the cluster's current time.
func (cc *ClusterClock) GetClusterTime() bson.Raw {
var ct bson.Raw
cc.lock.Lock()
ct = cc.clusterTime
cc.lock.Unlock()
return ct
}
// AdvanceClusterTime updates the cluster's current time.
func (cc *ClusterClock) AdvanceClusterTime(clusterTime bson.Raw) {
cc.lock.Lock()
cc.clusterTime = MaxClusterTime(cc.clusterTime, clusterTime)
cc.lock.Unlock()
}
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