Accessing Windows Idle Time with Go's syscall.Call() Function
In Go, accessing Windows system information like idle time requires utilizing the "syscall" package, which provides access to DLL functions. Since the Golang documentation focuses on Linux, obtaining the idle time necessitates executing godoc locally.
Using syscall.Call() to Retrieve Idle Time
To retrieve the idle time via GetLastInputInfo(), follow these steps:
- Import the "syscall" and "unsafe" packages.
- Load the user32 DLL using syscall.MustLoadDLL("user32.dll").
- Obtain the address of the GetLastInputInfo function using user32.MustFindProc("GetLastInputInfo").
- Create a struct with the same layout as the LastInputInfo struct, but with int fields converted to int32.
- Set the cbSize field of the struct to its size using lastInputInfo.cbSize = uint32(unsafe.Sizeof(lastInputInfo)).
-
Call GetLastInputInfo with a pointer to the struct:
<code class="go">r1, _, err := getLastInputInfo.Call( uintptr(unsafe.Pointer(&lastInputInfo)))</code>
- Check the r1 return value for the idle time in milliseconds.
Additional Notes:
- Call both ANSI and Unicode functions with the Unicode (W) suffix and use syscall's UTF-16 conversion functions for optimal results.
- Understand that syscall.Call() arguments and returns are uintptr.
- Respect ABI requirements by ignoring the _ return value on Windows.
The above is the detailed content of How to Retrieve Windows Idle Time Using Go\'s syscall.Call()?. For more information, please follow other related articles on the PHP Chinese website!

Goisidealforbuildingscalablesystemsduetoitssimplicity,efficiency,andbuilt-inconcurrencysupport.1)Go'scleansyntaxandminimalisticdesignenhanceproductivityandreduceerrors.2)Itsgoroutinesandchannelsenableefficientconcurrentprogramming,distributingworkloa

InitfunctionsinGorunautomaticallybeforemain()andareusefulforsettingupenvironmentsandinitializingvariables.Usethemforsimpletasks,avoidsideeffects,andbecautiouswithtestingandloggingtomaintaincodeclarityandtestability.

Goinitializespackagesintheordertheyareimported,thenexecutesinitfunctionswithinapackageintheirdefinitionorder,andfilenamesdeterminetheorderacrossmultiplefiles.Thisprocesscanbeinfluencedbydependenciesbetweenpackages,whichmayleadtocomplexinitializations

CustominterfacesinGoarecrucialforwritingflexible,maintainable,andtestablecode.Theyenabledeveloperstofocusonbehavioroverimplementation,enhancingmodularityandrobustness.Bydefiningmethodsignaturesthattypesmustimplement,interfacesallowforcodereusabilitya

The reason for using interfaces for simulation and testing is that the interface allows the definition of contracts without specifying implementations, making the tests more isolated and easy to maintain. 1) Implicit implementation of the interface makes it simple to create mock objects, which can replace real implementations in testing. 2) Using interfaces can easily replace the real implementation of the service in unit tests, reducing test complexity and time. 3) The flexibility provided by the interface allows for changes in simulated behavior for different test cases. 4) Interfaces help design testable code from the beginning, improving the modularity and maintainability of the code.

In Go, the init function is used for package initialization. 1) The init function is automatically called when package initialization, and is suitable for initializing global variables, setting connections and loading configuration files. 2) There can be multiple init functions that can be executed in file order. 3) When using it, the execution order, test difficulty and performance impact should be considered. 4) It is recommended to reduce side effects, use dependency injection and delay initialization to optimize the use of init functions.

Go'sselectstatementstreamlinesconcurrentprogrammingbymultiplexingoperations.1)Itallowswaitingonmultiplechanneloperations,executingthefirstreadyone.2)Thedefaultcasepreventsdeadlocksbyallowingtheprogramtoproceedifnooperationisready.3)Itcanbeusedforsend

ContextandWaitGroupsarecrucialinGoformanaginggoroutineseffectively.1)ContextallowssignalingcancellationanddeadlinesacrossAPIboundaries,ensuringgoroutinescanbestoppedgracefully.2)WaitGroupssynchronizegoroutines,ensuringallcompletebeforeproceeding,prev


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

WebStorm Mac version
Useful JavaScript development tools

Safe Exam Browser
Safe Exam Browser is a secure browser environment for taking online exams securely. This software turns any computer into a secure workstation. It controls access to any utility and prevents students from using unauthorized resources.

SublimeText3 Linux new version
SublimeText3 Linux latest version

MantisBT
Mantis is an easy-to-deploy web-based defect tracking tool designed to aid in product defect tracking. It requires PHP, MySQL and a web server. Check out our demo and hosting services.

SublimeText3 Mac version
God-level code editing software (SublimeText3)
