How to use golang to disable system hibernation

In recent years, Golang has been accepted by more and more programmers, and has gradually become one of the mainstream development languages ​​​​in major Internet companies. But when dealing with programs that need to run continuously, system hibernation can become a headache. This article will introduce readers to how to disable system hibernation so that the program will not be interrupted when it continues to run.

Golang system hibernation problem

In Golang, when the program runs for a long time, the operating system will automatically enter the hibernation state in order to save power and protect the hardware. This means that the system in the hibernation state suspends all operations, including the running of programs. If the program needs to run continuously for a long time, the system's sleep state will become a huge problem.

In traditional C language development, programmers can call system functions to prevent the system from entering sleep state. But in Golang, due to its own runtime environment and garbage collection mechanism, the program cannot freely control system behavior. So this becomes a headache.

Use system API to disable hibernation

We can use system API to disable system hibernation during Golang runtime. Use the syscall library in Golang to call the API implemented in C language, and prohibit the system from sleeping when the program is running.

The following is a simple example that shows how to use the syscall library and the SetThreadExecutionState function in C language to create an infinite loop program and reset the system execution state every minute to ensure that the computer does not enter sleep state. :

package main

import (
    "syscall"
    "time"
)

func main() {
    for {
        time.Sleep(time.Minute)
        syscall.SetThreadExecutionState(syscall.ES_CONTINUOUS | syscall.ES_SYSTEM_REQUIRED | syscall.ES_AWAYMODE_REQUIRED | syscall.ES_DISPLAY_REQUIRED)
    }
}

In this example, we use the Sleep function to let the program wait for one minute, and then call the SetThreadExecutionState function. It is a function in the Windows API that can change the system execution state of the computer.

In the code, the parameter syscall.ES_CONTINUOUS instructs the system to continue working regardless of whether an input event occurs, syscall.ES_SYSTEM_REQUIRED instructs the system not to enter hibernation, and syscall.ES_AWAYMODE_REQUIRED instructs the computer to enter regular hibernation instead of deep sleep. Hibernation, which saves power when input is inactive, syscall.ES_DISPLAY_REQUIRED indicates that the computer device cannot enter the display-off state. Together, these parameters will tell the operating system not to go to sleep, but to stay on.

Risks of doing so

Disabling system hibernation may have an impact on the computer's power consumption. Because the computer cannot go to sleep like normal, it will always stay on. Therefore, programs that run continuously for long periods of time will continue to consume power, potentially causing the computer to become hotter or draining the battery faster.

In addition, disabling system hibernation will affect the night task schedule. Many scheduled tasks require the system to sleep or hibernate when the computer is away. If the system cannot enter hibernation, these scheduled tasks will not be able to execute, which may cause unexpected problems and errors.

Therefore, before disabling system hibernation, programmers should carefully consider the usage scenarios of the computer, and if necessary, reduce the total time the program continues to run through program logic optimization and other methods to avoid potential risks.

Conclusion

Golang programs that run continuously for a long time need to adjust the behavior of the program according to the specific situation on the premise of ensuring that it does not enter system sleep. For some special occasions, we can call the system API to limit system sleep to achieve long-term program running. Of course, in order to avoid potential risks, we need to consider logic adjustments and system optimization so that the program can maintain better stability and security when running for a long time.

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