将指针从go传递到c-dll
我试图传递一个指向dll的双指针,该dll是由C在制作dll包装包时创建的 下面是C代码将指针从go传递到c-dll,go,system-calls,Go,System Calls,我试图传递一个指向dll的双指针,该dll是由C在制作dll包装包时创建的 下面是C代码 int getData(uint32_t ** buffer, uint32* sizeofBuffer) { //... *sizeofBuffer = n; *buffer = new uint32_t[n]; //do something return 0; } void releaseBuf(void* buffer) { delete buffer; }
int getData(uint32_t ** buffer, uint32* sizeofBuffer) {
//...
*sizeofBuffer = n;
*buffer = new uint32_t[n];
//do something
return 0;
}
void releaseBuf(void* buffer) {
delete buffer;
}
下面是go代码。我希望下面的代码运行良好,但事实并非如此
var (
Handle = syscall.LoadLibrary(`library\myDll.dll`)
procGet,_ = syscall.GetProcAddress(Handle, "getData")
procRelease,_ = syscall.GetProcAddress(Handle, "releaseBuf")
)
func main() {
var bufferPtr *uint32
var size uint32
_,_,err := syscall.Syscall(proc,uintptr(2), uintptr(unsafe.Pointer(&bufferPtr )), uintptr(unsafe.Pointer(&size)),uintptr(0))
if 0 != err {log.Fatal(syscall.Errno(err))}
var i uintptr = 0
for ; i<(uintptr)(size); i++ {
log.Printf("%d", (**uint32)(uintptr(unsafe.Pointer(bufferPtr ))+uintptr(i)*unsafe.Sizeof(*bufferPtr )))
}
_,_,err := syscall.Syscall(proc,uintptr(1), uintptr(unsafe.Pointer(bufferPtr)), uintptr(0), uintptr(0))
if 0 != err {log.Fatal(syscall.Errno(err))}
}
var(
Handle=syscall.LoadLibrary(`library\myDll.dll`)
procGet,U8;=syscall.GetProcAddress(句柄,“getData”)
ProcleLase,u=syscall.GetProcAddress(句柄,“releaseBuf”)
)
func main(){
var bufferPtr*uint32
变量大小uint32
_,_389;,err:=syscall.syscall(proc,uintpttr(2),uintpttr(unsafe.Pointer(&bufferPtr)),uintpttr(unsafe.Pointer(&size)),uintpttr(0))
如果0!=err{log.Fatal(syscall.Errno(err))}
变量i uintpttr=0
例如,我重新检查并发现了我的错误
将例行程序替换为以下内容
log.Printf("%d", *(*uint32)(unsaef.Pointer(uintptr(unsafe.Pointer(buffer))+i*unsafe.Sizeof(*buffer))))
:)