// Copyright 2019 PingCAP, Inc.
//
// 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
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// See the License for the specific language governing permissions and
// limitations under the License.

package worker

var conditionHub *ConditionHub

// ConditionHub holds a DM-worker and it is used for wait condition detection.
type ConditionHub struct {
	w *SourceWorker
}

// InitConditionHub inits the singleton instance of ConditionHub.
func InitConditionHub(w *SourceWorker) {
	conditionHub = &ConditionHub{
		w: w,
	}
}

// GetConditionHub returns singleton instance of ConditionHub.
func GetConditionHub() *ConditionHub {
	return conditionHub
}