// Copyright 2022 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,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package util

import (
	"time"

	"go.uber.org/atomic"
)

var (
	// MinSchedulerInterval is the minimum interval between two scheduling.
	MinSchedulerInterval = atomic.NewDuration(200 * time.Millisecond)

	// MaxOverclockCount is the maximum number of overclock goroutine.
	MaxOverclockCount = int32(1)
)

// GoroutinePool is a pool interface
type GoroutinePool interface {
	ReleaseAndWait()
	Tune(size int32)
	LastTunerTs() time.Time
	Cap() int32
	Running() int32
	Name() string
	GetOriginConcurrency() int32
}

// PoolContainer is a pool container
type PoolContainer struct {
	Pool      GoroutinePool
	Component Component
}

// Component is ID for difference component
type Component int

const (
	// UNKNOWN is for unknown component. It is only for test
	UNKNOWN Component = iota
	// DDL is for ddl component
	DDL
	// DistTask is for disttask component.
	DistTask
	// CheckTable is for admin check table component.
	CheckTable
	// ImportInto is for import into component.
	ImportInto
)