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goroutinequeue.go
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goroutinequeue.go
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package grqueue
import (
"sync"
)
type GoroutineQueue struct {
Number int //并发执行的任务个数
Total int //总任务数
tasks chan func() interface{}
task_end_callback func(result interface{})
finish_callback func()
wg sync.WaitGroup
}
func NewGoroutineQueue(number int, total int) *GoroutineQueue {
queue := &GoroutineQueue{
tasks: make(chan func() interface{}, total),
Number: number,
Total: total}
return queue
}
//开始执行task
func (queue *GoroutineQueue) Start() {
defer close(queue.tasks)
//加锁,锁的数量是tasks的数量
queue.wg.Add(len(queue.tasks))
for i := 0; i < queue.Number; i++ {
//分number个routine执行work
go queue.work()
}
//等待routine执行完毕
queue.wg.Wait()
//所有task完毕,若finish回调函数存在则执行则回调
if queue.finish_callback != nil {
queue.finish_callback()
}
}
func (queue *GoroutineQueue) work() {
for {
//不断取出task执行,直到chan关闭
task, ok := <-queue.tasks
if !ok {
break
}
res := task()
//完成一个task立即回调
if queue.task_end_callback != nil {
queue.task_end_callback(res)
}
//每执行完一个task,解锁一次
queue.wg.Done()
}
}
func (queue *GoroutineQueue) AddTask(task func() interface{}) {
queue.tasks <- task
}
func (queue *GoroutineQueue) SetFinishCallback(callback func()) {
queue.finish_callback = callback
}
func (queue *GoroutineQueue) SetTaskEndCallback(callback func(result interface{})) {
queue.task_end_callback = callback
}