I think the error is trying to tell you the C reopen function takes a
pointer to a function and you are passing it a Go func. Try googling "cgo
pass function pointer". That should yield documents like
https://eli.thegreenplace.net/2019/passing-callbacks-and-pointers-to-cgo/
which should point you in the right direction. I have to say, trying to do
something like this after using Go for just one month is very ambitious. I
think you are going to run into lots of problems due to your lack of
experience with Go (not Golang).
On Tue, Nov 21, 2023 at 7:28 PM ulis lee <ulis....@gmail.com> wrote:
> *Hi, all*
>
> It's been a month since I started Golang.
> But I was in a difficult situation. I need your help.
>
> *C code*
>
> int reopen (const char *fn, time_t check_interval_sec, int
> (*callback_func) (int num_entry, char **entry), int retry);
>
>
> *Go code*
>
> func _Open(fileName string, intervalSec int, f func(C.int, **C.char)
> C.int) int {
>
> cFileName := C.CString(fileName)
>
> defer C.free(unsafe.Pointer(cFileName))
>
>
> ret := C.reopen(cFileName, C.long(intervalSec), f, 1)
>
> return int(ret)
>
> }
>
> error message
> cannot use f (variable of type func(_Ctype_int, **_Ctype_char) _Ctype_int)
> as *[0]byte value in argument to (_Cfunc_reopen)
>
> --
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> .
>
--
Kurtis Rader
Caretaker of the exceptional canines Junior and Hank
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