GoLang之调用C接口的使用方法

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2014-06-10 wcdj


摘要:本文主要介绍在GoLang中如何实现调用C接口。由于Go的官网经常被墙,导致无法浏览官方的详细文档,偶然间在浏览GoLang的源码中找到了一些关于cgo的用法,具体路径在go/misc/cgo目录下。


例如,在go/misc/cgo/gmp/gmp.go文件中可以找到如何在GoLang中引用C Library的方法:

An example of wrapping a C library in Go. This is the GNU multiprecision library gmp's integer type mpz_t wrapped to look like the Go package big's integer type Int.


下面是一个简单的例子:hello.go

完整的代码可以浏览这里:https://github.com/gerryyang/goinaction/blob/master/src/cgo/src/hello.go

package main/*#include <stdio.h>#include <stdlib.h>#include <unistd.h>#include "../inc/hello.h"// intentionally write the same LDFLAGS differently#cgo linux LDFLAGS: -L../lib -lhello#cgo darwin LDFLAGS: -L../lib -lhello#if 0void hello(const char *name){printf("%s\n", name);return;}#endif*/import "C"import ("fmt""time")func Hello(s string) {cs := C.CString(s)C.hello(cs)}func main() {Seed(1000)fmt.Println(int(C.random()))time.Sleep(time.Duration(1) * time.Second)fmt.Println(int(C.random()))fmt.Println("getpid:", int(C.getpid()))C.puts(C.CString("call C puts"))Hello("call C's go wrapper func")C.hello(C.CString("call C hello func"))}func Seed(i int) {C.srandom(C.uint(i))}


参考

[1] http://www.cnblogs.com/yjf512/archive/2012/07/19/2599304.html

[2] http://tonybai.com/tag/cgo/




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