Golang调用C/C++方法

go文件中直接写c/c++代码，并调用

    package main  

    /* 
    #include <stdio.h> 
    #include <stdlib.h> 
    #include <unistd.h> 
    void hello(const char *str)
    {
        printf("%s(%d): %s\n", __FUNCTION__, __LINE__, str);
    }
    */  
    import "C"  

    func main() {  

        C.hello(C.CString("call C hello func"))  
    }

编译运行

[root@localhost test]# go build main.go
[root@localhost test]# ./main 
hello(9): call C hello func

go调用c/c++动态库中的方法。

.
./hello.c
./hello.h
./main.go

hello.h

#ifndef ___HELLO___
#define __HELLO___
void hello(const char *str);
#endif

hello.c

#include "hello.h"
#include <stdio.h>

void hello(const char *str)
{
    printf("%s(%d): %s\n", __FUNCTION__, __LINE__, str);
}

main.go

package main  

/* 
#include <stdio.h> 
#include <stdlib.h> 
#include <unistd.h> 
#include "hello.h" 

// intentionally write the same LDFLAGS differently 
#cgo linux LDFLAGS: -L. -lhello 
#cgo darwin LDFLAGS: -L. -lhello 
*/  
import "C"  

func main() {  

    C.hello(C.CString("call C hello func"))  
}

编译运行:

[root@localhost demo]# gcc -fPIC -shared hello.c -o libhello.so
[root@localhost demo]# go build main.go
[root@localhost demo]# ./main 
hello(6): call C hello func
[root@localhost demo]#

go 使用线程库

仅修改hello.c文件

[root@localhost demo1]# cat hello.c 
#include "hello.h"
#include <stdio.h>
#include <pthread.h>

void *func(void *arg)
{
    int i = 0;
    for (i = 0; i < 10; i++){
        printf("%d ", i);
    }
    printf("\n");
}

void hello(const char *str)
{
    pthread_t pthread;
    pthread_create(&pthread, NULL, &func, NULL);
    printf("%s(%d): %s\n", __FUNCTION__, __LINE__, str);
    pthread_join(pthread, NULL);
}

编译运行:

[root@localhost demo1]# gcc -fPIC -shared hello.c -o libhello.so 
[root@localhost demo1]# go build main.go
[root@localhost demo1]# ./main 
hello(18): call C hello func
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