Detailed explanation of Golang compiled into DLL file
The following column golang tutorial will introduce to you the method of compiling Golang into a DLL file. I hope it will be helpful to friends in need!
Golang requires gcc when compiling dll, so install MinGW first.
Windows 64-bit system should download the 64-bit version of MinGW: https://sourceforge.net/projects/mingw-w64/
After downloading, run mingw-w64-install.exe and complete MingGW installation.
First write the golang program exportgo.go:
package main import "C" import "fmt" //export PrintBye func PrintBye() { fmt.Println("From DLL: Bye!") } //export Sum func Sum(a int, b int) int { return a + b; } func main() { // Need a main function to make CGO compile package as C shared library }
Compile it into a DLL file:
go build -buildmode=c-shared -o exportgo.dll exportgo.go
After compilation, you get two files, exportgo.dll and exportgo.h.
Refer to the function definition in the exportgo.h file and write the C# file importgo.cs:
using System; using System.Runtime.InteropServices; namespace HelloWorld { class Hello { [DllImport("exportgo.dll", EntryPoint="PrintBye")] static extern void PrintBye(); [DllImport("exportgo.dll", EntryPoint="Sum")] static extern int Sum(int a, int b); static void Main() { Console.WriteLine("Hello World!"); PrintBye(); Console.WriteLine(Sum(33, 22)); }
Compile the CS file to get the exe
csc importgo.cs
Put the exe and dll In the same directory, run.
>importgo.exe Hello World! From DLL: Bye! 55
The string parameters in golang can be referenced as follows in C#:
public struct GoString { public string Value { get; set; } public int Length { get; set; } public static implicit operator GoString(string s) { return new GoString() { Value = s, Length = s.Length }; } public static implicit operator string(GoString s) => s.Value; }
// func.go package main import "C" import "fmt" //export Add func Add(a C.int, b C.int) C.int { return a + b } //export Print func Print(s *C.char) { /* 函数参数可以用 string, 但是用*C.char更通用一些。 由于string的数据结构,是可以被其它go程序调用的, 但其它语言(如 python)就不行了 */ print("Hello ", C.GoString(s)) //这里不能用fmt包,会报错,调了很久... } func main() { }
Compile
go build -ldflags " -s -w" -buildmode=c-shared -o func.dll func.go
is still a bit big, 880KB. The pure C version is only 48KB. It should not contain all the dependencies. , go is all-inclusive
Go call
package main import ( "fmt" "syscall" ) func main() { dll := syscall.NewLazyDLL("func.dll") add := dll.NewProc("Add") prt := dll.NewProc("Print") r, err, msg := add.Call(32, 44) fmt.Println(r) fmt.Println(err) fmt.Println(msg) name := C.CString("Andy") prt.Call(uintptr(unsafe.Pointer(name))) }
out: 76 0 The operation completed successfully. Hello Andy
Python call
from ctypes import CDLL, c_char_p dll = CDLL("func.dll") dll.Add(32, 33) dll.Print(c_char_p(bytes("Andy", "utf8")))
C call
#include <iostream> #include <windows.h> using namespace std; typedef int(*pAdd)(int a, int b); typedef void(*pPrt)(char* s); int main(int argc, char *argv[]) { HMODULE dll= LoadLibraryA("func.dll"); pAdd add = (pAdd)GetProcAddress(dll, "Add"); pPrt prt = (pPrt)GetProcAddress(dll, "Print"); cout << add(321, 33) << endl; prt("Andy"); FreeLibrary(dll); return 0; }
For more related technical articles, please Visit the go language tutorial column!
The above is the detailed content of Detailed explanation of Golang compiled into DLL file. For more information, please follow other related articles on the PHP Chinese website!

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

AI Hentai Generator
Generate AI Hentai for free.

Hot Article

Hot Tools

Notepad++7.3.1
Easy-to-use and free code editor

SublimeText3 Chinese version
Chinese version, very easy to use

Zend Studio 13.0.1
Powerful PHP integrated development environment

Dreamweaver CS6
Visual web development tools

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

Hot Topics

Reading and writing files safely in Go is crucial. Guidelines include: Checking file permissions Closing files using defer Validating file paths Using context timeouts Following these guidelines ensures the security of your data and the robustness of your application.

How to configure connection pooling for Go database connections? Use the DB type in the database/sql package to create a database connection; set MaxOpenConns to control the maximum number of concurrent connections; set MaxIdleConns to set the maximum number of idle connections; set ConnMaxLifetime to control the maximum life cycle of the connection.

The Go framework stands out due to its high performance and concurrency advantages, but it also has some disadvantages, such as being relatively new, having a small developer ecosystem, and lacking some features. Additionally, rapid changes and learning curves can vary from framework to framework. The Gin framework is a popular choice for building RESTful APIs due to its efficient routing, built-in JSON support, and powerful error handling.

Best practices: Create custom errors using well-defined error types (errors package) Provide more details Log errors appropriately Propagate errors correctly and avoid hiding or suppressing Wrap errors as needed to add context

Common problems and solutions in Go framework dependency management: Dependency conflicts: Use dependency management tools, specify the accepted version range, and check for dependency conflicts. Vendor lock-in: Resolved by code duplication, GoModulesV2 file locking, or regular cleaning of the vendor directory. Security vulnerabilities: Use security auditing tools, choose reputable providers, monitor security bulletins and keep dependencies updated.

In Go framework development, common challenges and their solutions are: Error handling: Use the errors package for management, and use middleware to centrally handle errors. Authentication and authorization: Integrate third-party libraries and create custom middleware to check credentials. Concurrency processing: Use goroutines, mutexes, and channels to control resource access. Unit testing: Use gotest packages, mocks, and stubs for isolation, and code coverage tools to ensure sufficiency. Deployment and monitoring: Use Docker containers to package deployments, set up data backups, and track performance and errors with logging and monitoring tools.

The difference between the GoLang framework and the Go framework is reflected in the internal architecture and external features. The GoLang framework is based on the Go standard library and extends its functionality, while the Go framework consists of independent libraries to achieve specific purposes. The GoLang framework is more flexible and the Go framework is easier to use. The GoLang framework has a slight advantage in performance, and the Go framework is more scalable. Case: gin-gonic (Go framework) is used to build REST API, while Echo (GoLang framework) is used to build web applications.

JSON data can be saved into a MySQL database by using the gjson library or the json.Unmarshal function. The gjson library provides convenience methods to parse JSON fields, and the json.Unmarshal function requires a target type pointer to unmarshal JSON data. Both methods require preparing SQL statements and performing insert operations to persist the data into the database.
