Sync!
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golang sync test
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| package main | |
| import ( | |
| "fmt" | |
| "runtime" | |
| "sync" | |
| "time" | |
| ) | |
| func main() { | |
| runtime.GOMAXPROCS(runtime.NumCPU()) | |
| l := new(sync.Mutex) | |
| c := sync.NewCond(l) | |
| for i := 0; i < 10; i++ { | |
| go func(i int) { | |
| fmt.Printf("waiting %d\n", i) | |
| l.Lock() | |
| defer l.Unlock() | |
| c.Wait() | |
| fmt.Printf("go %d\n", i) | |
| }(i) | |
| } | |
| for i := 3; i >= 0; i-- { | |
| time.Sleep(1 * time.Second) | |
| fmt.Println(i) | |
| } | |
| c.Broadcast() | |
| time.Sleep(3 * time.Second) | |
| } |
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| package main | |
| import ( | |
| "fmt" | |
| "runtime" | |
| "sync" | |
| "time" | |
| ) | |
| func main() { | |
| runtime.GOMAXPROCS(runtime.NumCPU()) | |
| l := new(sync.Mutex) | |
| c := sync.NewCond(l) | |
| for i := 0; i < 10; i++ { | |
| go func(i int) { | |
| fmt.Printf("waiting %d\n", i) | |
| l.Lock() | |
| defer l.Unlock() | |
| c.Wait() | |
| fmt.Printf("go %d\n", i) | |
| }(i) | |
| } | |
| for i := 0; i < 10; i++ { | |
| time.Sleep(1 * time.Second) | |
| c.Signal() | |
| } | |
| time.Sleep(1 * time.Second) | |
| } |
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| package main | |
| import ( | |
| "fmt" | |
| "runtime" | |
| "sync" | |
| "time" | |
| ) | |
| func main() { | |
| runtime.GOMAXPROCS(runtime.NumCPU()) | |
| wg := new(sync.WaitGroup) | |
| wg,Add(2) | |
| go func() { | |
| wg.Done() | |
| }() | |
| go func() { | |
| } | |
| } |
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| package main | |
| import ( | |
| "fmt" | |
| "runtime" | |
| "sync" | |
| "time" | |
| ) | |
| func parallel(wg *sync.WaitGroup, m *sync.Mutex) { | |
| m.Lock() | |
| defer m.Unlock() | |
| fmt.Println("博") | |
| time.Sleep(100 * time.Millisecond) | |
| fmt.Println("多") | |
| time.Sleep(100 * time.Millisecond) | |
| fmt.Println("の") | |
| time.Sleep(100 * time.Millisecond) | |
| fmt.Println("塩") | |
| wg.Done() | |
| } | |
| func main() { | |
| runtime.GOMAXPROCS(runtime.NumCPU()) | |
| wg := new(sync.WaitGroup) | |
| m := new(sync.Mutex) | |
| for i := 0; i < 3; i++ { | |
| wg.Add(1) | |
| go parallel(wg, m) | |
| } | |
| wg.Wait() | |
| } |
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| package main | |
| import ( | |
| "fmt" | |
| "runtime" | |
| "sync" | |
| "time" | |
| ) | |
| func parallel(wg *sync.WaitGroup) { | |
| fmt.Println("博") | |
| time.Sleep(100 * time.Millisecond) | |
| fmt.Println("多") | |
| time.Sleep(100 * time.Millisecond) | |
| fmt.Println("の") | |
| time.Sleep(100 * time.Millisecond) | |
| fmt.Println("塩") | |
| wg.Done() | |
| } | |
| func main() { | |
| runtime.GOMAXPROCS(runtime.NumCPU()) | |
| wg := new(sync.WaitGroup) | |
| for i := 0; i < 3; i++ { | |
| wg.Add(1) | |
| go parallel(wg) | |
| } | |
| wg.Wait() | |
| } |
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| package main | |
| import ( | |
| "fmt" | |
| "runtime" | |
| "sync" | |
| ) | |
| var once = new(sync.Once) | |
| func greeting(wg *sync.WaitGroup) { | |
| once.Do(func() { | |
| fmt.Println("こんにちわ") | |
| }) | |
| fmt.Println("ごきげんいかがですか") | |
| wg.Done() | |
| } | |
| func main() { | |
| runtime.GOMAXPROCS(runtime.NumCPU()) | |
| defer fmt.Println("さようなら") | |
| wg := new(sync.WaitGroup) | |
| for i := 0; i < 5; i++ { | |
| wg.Add(1) | |
| go greeting(wg) | |
| } | |
| wg.Wait() | |
| } |
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| package main | |
| import ( | |
| "fmt" | |
| "runtime" | |
| "sync" | |
| "time" | |
| ) | |
| func main() { | |
| runtime.GOMAXPROCS(runtime.NumCPU()) | |
| p := sync.Pool{ | |
| New: func() interface{} { | |
| return "定時作業" | |
| }, | |
| } | |
| wg := new(sync.WaitGroup) | |
| for i := 0; i < 5; i++ { | |
| p.Put("割込作業") | |
| time.Sleep(100 * time.Millisecond) | |
| } | |
| runtime.GC() | |
| wg.Add(1) | |
| go func() { | |
| for i := 0; i < 10; i++ { | |
| fmt.Println(p.Get()) | |
| time.Sleep(50 * time.Millisecond) | |
| } | |
| wg.Done() | |
| }() | |
| wg.Wait() | |
| } |
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| package main | |
| import ( | |
| "fmt" | |
| "runtime" | |
| "sync" | |
| "time" | |
| ) | |
| func main() { | |
| runtime.GOMAXPROCS(runtime.NumCPU()) | |
| p := sync.Pool{ | |
| New: func() interface{} { | |
| return "定時作業" | |
| }, | |
| } | |
| wg := new(sync.WaitGroup) | |
| wg.Add(1) | |
| go func() { | |
| for i := 0; i < 10; i++ { | |
| p.Put("割込作業") | |
| time.Sleep(100 * time.Millisecond) | |
| } | |
| wg.Done() | |
| }() | |
| wg.Add(1) | |
| go func() { | |
| for i := 0; i < 10; i++ { | |
| fmt.Println(p.Get()) | |
| time.Sleep(50 * time.Millisecond) | |
| } | |
| wg.Done() | |
| }() | |
| wg.Wait() | |
| } |
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| package main | |
| import ( | |
| "fmt" | |
| "runtime" | |
| "sync" | |
| "time" | |
| ) | |
| func writeParallel(wg *sync.WaitGroup, m *sync.RWMutex) { | |
| m.Lock() | |
| defer m.Unlock() | |
| fmt.Println("博") | |
| time.Sleep(100 * time.Millisecond) | |
| fmt.Println("多") | |
| time.Sleep(100 * time.Millisecond) | |
| fmt.Println("の") | |
| time.Sleep(100 * time.Millisecond) | |
| fmt.Println("塩") | |
| wg.Done() | |
| } | |
| func readParallel(wg *sync.WaitGroup, m *sync.RWMutex) { | |
| m.RLock() | |
| defer m.RUnlock() | |
| fmt.Println("博") | |
| time.Sleep(100 * time.Millisecond) | |
| fmt.Println("多") | |
| time.Sleep(100 * time.Millisecond) | |
| fmt.Println("の") | |
| time.Sleep(100 * time.Millisecond) | |
| fmt.Println("塩") | |
| wg.Done() | |
| } | |
| func main() { | |
| runtime.GOMAXPROCS(runtime.NumCPU()) | |
| wg := new(sync.WaitGroup) | |
| m := new(sync.RWMutex) | |
| fmt.Println("Read vs Read") | |
| wg.Add(2) | |
| go readParallel(wg, m) | |
| go readParallel(wg, m) | |
| wg.Wait() | |
| fmt.Println("") | |
| fmt.Println("Write vs Write") | |
| wg.Add(2) | |
| go writeParallel(wg, m) | |
| go writeParallel(wg, m) | |
| wg.Wait() | |
| fmt.Println("") | |
| fmt.Println("Write vs Read") | |
| wg.Add(2) | |
| go writeParallel(wg, m) | |
| go readParallel(wg, m) | |
| wg.Wait() | |
| fmt.Println("") | |
| } |
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| package main | |
| import ( | |
| "fmt" | |
| "runtime" | |
| "sync" | |
| "time" | |
| ) | |
| func sleep(wg *sync.WaitGroup, number int) { | |
| time.Sleep(time.Duration(number) * time.Second) | |
| fmt.Println(number) | |
| wg.Done() | |
| } | |
| func main() { | |
| runtime.GOMAXPROCS(runtime.NumCPU()) | |
| items := []int{3, 1, 4, 1, 5, 9, 2, 6, 5, 3, 5} | |
| wg := new(sync.WaitGroup) | |
| for _, i := range items { | |
| wg.Add(1) | |
| go sleep(wg, i) | |
| } | |
| wg.Wait() | |
| } |
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