97 lines
2.2 KiB
Go
97 lines
2.2 KiB
Go
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package cyclic_barrier
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import (
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"context"
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"fmt"
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"github.com/marusama/cyclicbarrier"
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"golang.org/x/sync/semaphore"
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"math/rand"
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"sync"
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"time"
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)
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const (
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H2OHydrogenNum = 2 // 氢原子数量
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H2OOxygenNum = 1 // 氧原子数量
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)
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// H2O 水分子结构体
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type H2O struct {
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semaH *semaphore.Weighted
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semaO *semaphore.Weighted
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cb cyclicbarrier.CyclicBarrier
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wg sync.WaitGroup
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}
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func NewH2O() *H2O {
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return &H2O{
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semaH: semaphore.NewWeighted(H2OHydrogenNum), // 氢原子的信号量
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semaO: semaphore.NewWeighted(H2OOxygenNum), // 氧原子的信号量
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cb: cyclicbarrier.New(H2OHydrogenNum + H2OOxygenNum), // 循环栅栏，用来控制合成
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}
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}
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func (h *H2O) hydrogen(releaseHydrogen func()) {
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if err := h.semaH.Acquire(context.Background(), 1); err != nil { // 占用氢原子空槽
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fmt.Println("Hydrogen Acquire err:", err)
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}
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releaseHydrogen()
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if err := h.cb.Await(context.Background()); err != nil { // 等待栅栏放行
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fmt.Println("Hydrogen Await err:", err)
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}
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h.semaH.Release(1) // 释放氢原子空槽
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}
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func (h *H2O) oxygen(releaseOxygen func()) {
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if err := h.semaO.Acquire(context.Background(), 1); err != nil { // 占用氧原子空槽
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fmt.Println("Oxygen Acquire err:", err)
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}
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releaseOxygen()
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if err := h.cb.Await(context.Background()); err != nil { // 等待栅栏放行
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fmt.Println("Oxygen Await err:", err)
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}
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h.semaO.Release(1) // 释放氧原子空槽
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}
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func (h *H2O) Gen(num uint) <-chan string {
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// 计算总共需要生成的原子数量
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sum := H2OHydrogenNum + H2OOxygenNum
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numInt := int(num)
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// 用来存放生成的原子
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ch := make(chan string, numInt*sum)
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releaseHydrogen := func() {
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ch <- "H"
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}
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releaseOxygen := func() {
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ch <- "O"
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}
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// 使用 WaitGroup 等待所有的 goroutine 完成
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h.wg.Add(numInt * sum)
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for i := 0; i < numInt*H2OHydrogenNum; i++ {
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go func() {
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time.Sleep(time.Duration(rand.Intn(100)) * time.Millisecond)
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h.hydrogen(releaseHydrogen)
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h.wg.Done()
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}()
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}
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for i := 0; i < numInt*H2OOxygenNum; i++ {
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go func() {
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time.Sleep(time.Duration(rand.Intn(100)) * time.Millisecond)
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h.oxygen(releaseOxygen)
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h.wg.Done()
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}()
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}
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go func() {
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h.wg.Wait()
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close(ch)
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}()
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return ch
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}
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