You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
50 lines
1.4 KiB
50 lines
1.4 KiB
// Copyright 2017 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 kv
|
|
|
|
// Variables defines the variables used by KV storage.
|
|
type Variables struct {
|
|
// BackoffLockFast specifies the LockFast backoff base duration in milliseconds.
|
|
BackoffLockFast int
|
|
|
|
// BackOffWeight specifies the weight of the max back off time duration.
|
|
BackOffWeight int
|
|
|
|
// Hook is used for test to verify the variable take effect.
|
|
Hook func(name string, vars *Variables)
|
|
|
|
// Pointer to SessionVars.Killed
|
|
// Killed is a flag to indicate that this query is killed.
|
|
Killed *uint32
|
|
}
|
|
|
|
// NewVariables create a new Variables instance with default values.
|
|
func NewVariables(killed *uint32) *Variables {
|
|
return &Variables{
|
|
BackoffLockFast: DefBackoffLockFast,
|
|
BackOffWeight: DefBackOffWeight,
|
|
Killed: killed,
|
|
}
|
|
}
|
|
|
|
var ignoreKill uint32
|
|
|
|
// DefaultVars is the default variables instance.
|
|
var DefaultVars = NewVariables(&ignoreKill)
|
|
|
|
// Default values
|
|
const (
|
|
DefBackoffLockFast = 100
|
|
DefBackOffWeight = 2
|
|
)
|
|
|