The creation and life cycle of Golang coroutines
Apr 15, 2024 pm 05:06 PM
Coroutine is a lightweight thread that reuses execution units in the same call stack through explicit switching. Its life cycle includes creation, execution, suspension, recovery and completion. Use the go keyword to create a coroutine, which can be used for parallel calculations (such as calculating Fibonacci numbers) in practice.
The creation and life cycle of Golang coroutines
Introduction
Coroutines It is a lightweight thread. Coroutines are similar to threads and are independent execution units. But unlike threads, coroutines do not need to have independent call stacks like threads. Instead, they reuse the call stacks of coroutine creation functions by explicitly suspending (yield) or resuming (resume) the coroutine. Make the switch.
Create a coroutine
In Go, use the go keyword to create a coroutine. The syntax is as follows:
go <協(xié)程體>
Among them, <coroutine body> represents the code block to be executed by the coroutine.
The life cycle of the coroutine
The life cycle of the coroutine is mainly divided into the following stages:
- Creation: Coroutines are created using the
gokeyword. - Execution: The coroutine starts executing its code block.
- Suspension: The coroutine is suspended by calling the
chan <-orselectstatement. - Recovery: The coroutine is restored through the
<-chanorselectstatement. - Complete: Coroutine execution is completed, or
close(chan)is called.
Practical case
The following is an example of using coroutine to calculate the Fibonacci sequence:
package main
import "fmt"
func main() {
// 創(chuàng)建一個協(xié)程計算斐波那契數(shù)列
go func() {
first, second := 0, 1
for i := 0; i < 10; i++ {
fmt.Println(first)
temp := first
first = second
second = temp + second
}
}()
// 主協(xié)程等待其他協(xié)程執(zhí)行完成
<-make(chan bool)
}In this example, We create a goroutine to calculate the Fibonacci sequence. The main coroutine uses make(chan bool) to create an unbuffered channel and waits for the channel to be closed. When the goroutine completes its computation, it closes the channel, thereby notifying the main goroutine of the end.
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