我的c++头文件：
#ifdef __cplusplus
extern "C" {
#endif
typedef void (__stdcall *CallBackEvent)(const char* call_event,const char* ext_id,const char* visitor_id, \
const char* from,const char* to ,const char* caller_id, int duration);
//port
int __stdcall Connect(const char* ip, short port);
//
void __stdcall DisConnect();
//
int __stdcall SetEventCallBack(CallBackEvent eventcb);
.........
使用go调用的代码
import (
"fmt"
"github.com/ant0ine/go-json-rest/rest"
"github.com/astaxie/beego/config"
"log"
"strconv"
"syscall"
"unsafe"
)
var (
_Connect_lpcc uintptr
)
func abort(funcname string, err error) {
panic(funcname + " failed: " + err.Error())
}
func connect_server(ipstring string, port int) bool {
lpcclib, err := syscall.LoadLibrary("libLPCC.dll")
if err != nil {
fmt.Println("load libLPCC.dll failed")
}
defer syscall.FreeLibrary(lpcclib)
_Connect_lpcc, _ = syscall.GetProcAddress(lpcclib, "Connect")
fmt.Print("ip: ", ipstring, " port: ", port)
fmt.Println(" ")
ret, _, callErr := syscall.Syscall(_Connect_lpcc, 2, uintptr(unsafe.Pointer(&ipstring)), uintptr(unsafe.Pointer(&port)), 0)
if callErr != 0 {
fmt.Println("callErr", callErr)
}
//return int(ret)
log.Println("ret:", ret)
return true
}
func main() {
iniconf, errc := config.NewConfig("ini", "restconf.conf")
//var result int64
if errc != nil {
//log.Fatal(errc)
fmt.Println("config file fatal")
}
ipstring := iniconf.String("ip")
fmt.Println(ipstring)
port := iniconf.String("port")
fmt.Println(port)
nPort, err := strconv.Atoi(port)
if err != nil {
nPort = 9020
}
bres := connect_server(ipstring, nPort)
if bres == true {
fmt.Println("connected")
} else {
fmt.Println("connect failed")
}
}
在go build后运行的结果
C:\works\Go>LPCCRest.exe
127.0.0.1
9020
ip: 127.0.0.1port: 9020
Exception 0xc0000005 0x0 0xc 0x310e414d
PC=0x310e414d
signal arrived during cgo execution
main.connect_server(0x10eb25d0, 0x9, 0x233c, 0x0)
C:/works/Go/LPCCRest.go:40 +0x387
main.main()
C:/works/Go/LPCCRest.go:67 +0x2c2
eax 0x0
ebx 0x10ef3e94
ecx 0x7239
edx 0x0
edi 0x31076e30
esi 0x0
ebp 0x6fec0
esp 0x6fc18
eip 0x310e414d
eflags 0x10246
cs 0x1b
fs 0x3b
gs 0x0
C:\works\Go>
而网友的调用win32 api的则可以正常地连接
package main
/*
* title:golang调用kernel32.dll 设置console标题，获取系统磁盘列表以及容量
* author:tjzaimee@163.com
* date:2013-12-27
*/
import (
"fmt"
"syscall"
"unsafe"
"runtime"
"os"
"strconv"
)
var(
_SetConsoleTitle uintptr
_GetLogicalDriveStrings uintptr
_GetDiskFreeSpaceEx uintptr
)
func init(){
kernel32, loadErr := syscall.LoadLibrary("kernel32.dll")
if loadErr != nil{
fmt.Println("loadErr",loadErr)
}
defer syscall.FreeLibrary(kernel32)
_SetConsoleTitle,_ = syscall.GetProcAddress(kernel32,"SetConsoleTitleW")
_GetLogicalDriveStrings,_ = syscall.GetProcAddress(kernel32,"GetLogicalDriveStringsW")
_GetDiskFreeSpaceEx, _ = syscall.GetProcAddress(kernel32,"GetDiskFreeSpaceExW")
}
func FormatSpace(str string,pos int) string{
if pos > len(str){
var space string
for i:= 0; i < pos-len(str); i++{
space += " "
}
str = space+str
}
return str
}
func SetConsoleTitle(title string) int {
ret, _, callErr := syscall.Syscall(_SetConsoleTitle,1,uintptr(unsafe.Pointer(syscall.StringToUTF16Ptr(title))),0,0)
if callErr != 0 {
fmt.Println("callErr", callErr)
}
return int(ret)
}
func GetLogicalDriveStrings() []string{
lpBuffer := make([]byte,256)
_,_,callErr := syscall.Syscall(_GetLogicalDriveStrings,2,uintptr(len(lpBuffer)),uintptr(unsafe.Pointer(&lpBuffer[0])),0)
if callErr != 0 {
fmt.Println("callErr", callErr)
}
disk := []string{}
for _,v := range lpBuffer{
if v >= 65 && v <= 90{
disk = append(disk,string(v)+":")
}
}
return disk
}
func GetDiskFreeSpaceEx(disk []string){
fmt.Println("-------------------------------------")
fmt.Println("驱动器 可用(MB) 总共(MB) 已用(MB)")
fmt.Println("-------------------------------------")
for _,v := range disk{
lpFreeBytesAvailable := int64(0)
lpTotalNumberOfBytes := int64(0)
lpTotalNumberOfFreeBytes := int64(0)
ret, _, _ := syscall.Syscall6(uintptr(_GetDiskFreeSpaceEx), 4, uintptr(unsafe.Pointer(syscall.StringToUTF16Ptr(v))), uintptr(unsafe.Pointer(&lpFreeBytesAvailable)), uintptr(unsafe.Pointer(&lpTotalNumberOfBytes)), uintptr(unsafe.Pointer(&lpTotalNumberOfFreeBytes)), 0, 0)
if ret != 0{
totalNumberOfFree := strconv.Itoa(int(lpTotalNumberOfFreeBytes/1024/1024))
totalNumberOfFree = FormatSpace(totalNumberOfFree,6)
totalNumber := strconv.Itoa(int(lpTotalNumberOfBytes/1024/1024))
totalNumber = FormatSpace(totalNumber,6)
noFreeNumber := strconv.Itoa(int((lpTotalNumberOfBytes-lpTotalNumberOfFreeBytes)/1024/1024))
noFreeNumber = FormatSpace(noFreeNumber,6)
fmt.Printf("%s %s %s %s\n", v,totalNumberOfFree,totalNumber,noFreeNumber)
}
}
fmt.Println("-------------------------------------")
}
func main() {
hostname,_ := os.Hostname()
SetConsoleTitle(hostname+"计算机详细参数")
fmt.Printf("%s/%s\n",hostname,os.Getenv("username"))
fmt.Printf("%s %s CPU：
%d\n",os.Getenv("OS"),os.Getenv("PROCESSOR_ARCHITECTURE"),runtime.NumCPU())
disk := GetLogicalDriveStrings()
GetDiskFreeSpaceEx(disk)
fmt.Scanln()
}
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