89 lines
2.3 KiB
Go
89 lines
2.3 KiB
Go
// Copyright 2021 PingCAP, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package util
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import (
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"sync"
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"go.uber.org/atomic"
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)
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// WaitGroupWrapper is a wrapper for sync.WaitGroup
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type WaitGroupWrapper struct {
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sync.WaitGroup
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}
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// Run runs a function in a goroutine, adds 1 to WaitGroup
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// and calls done when function returns. Please DO NOT use panic
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// in the cb function.
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func (w *WaitGroupWrapper) Run(exec func()) {
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w.Add(1)
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go func() {
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defer w.Done()
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exec()
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}()
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}
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// RunWithRecover wraps goroutine startup call with force recovery, add 1 to WaitGroup
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// and call done when function return. it will dump current goroutine stack into log if catch any recover result.
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// exec is that execute logic function. recoverFn is that handler will be called after recover and before dump stack,
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// passing `nil` means noop.
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func (w *WaitGroupWrapper) RunWithRecover(exec func(), recoverFn func(r interface{})) {
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w.Add(1)
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go func() {
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defer func() {
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r := recover()
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if r != nil && recoverFn != nil {
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recoverFn(r)
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}
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w.Done()
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}()
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exec()
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}()
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}
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// NotifyErrorWaitGroupWrapper is a wrapper for sync.WaitGroup
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type NotifyErrorWaitGroupWrapper struct {
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sync.WaitGroup
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notify chan error
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cnt atomic.Uint64
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}
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// NewNotifyErrorWaitGroupWrapper is to create NotifyErrorWaitGroupWrapper
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func NewNotifyErrorWaitGroupWrapper(notify chan error) *NotifyErrorWaitGroupWrapper {
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return &NotifyErrorWaitGroupWrapper{
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notify: notify,
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cnt: *atomic.NewUint64(0),
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}
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}
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// Run runs a function in a goroutine, adds 1 to WaitGroup
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// and calls done when function returns. Please DO NOT use panic
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// in the cb function.
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func (w *NotifyErrorWaitGroupWrapper) Run(exec func()) {
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w.Add(1)
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old := w.cnt.Inc() - 1
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go func(cnt uint64) {
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defer func() {
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w.Done()
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if cnt == 0 {
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w.Wait()
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close(w.notify)
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}
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}()
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exec()
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}(old)
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}
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