01:54 <triangle345> hey guys if I wanted to pass a pointer to a windows function how would i do it? I tried to pass in [Pointer[_myprimitive]] but didnt work

11:03 <triangle345> hey anyone feel like helping me out with some windows ffi issues?

11:03 <triangle345> :)

11:04 <doublec> triangle345: sure

11:08 <triangle345> haha hey doublec how you doing

11:09 <triangle345> this is a similar but different issue

11:09 <triangle345> so i'm trying to make createprocess work https://msdn.microsoft.com/en-us/library/windows/desktop/ms682425(v=vs.85).aspx

11:09 <triangle345> im obviously now using createprocessA for ascii version

11:10 <triangle345> im setting everything to U8(0) except for the last two values (processinfo) and (startupinfo) which i have as primitives

11:10 <triangle345> like so

11:10 <triangle345> var pi:Pointer[_PROCESSINFORMATION] = Pointer[_PROCESSINFORMATION] var si:Pointer[_STARTUPINFO] = Pointer[_STARTUPINFO]

11:10 <triangle345> which then i go like so:

11:10 <triangle345> @CreateProcessA[Bool]( U8(0), // No module name (use command line) "notepad.exe".cstring(), // Command line U8(0), // Process handle not inheritable U8(0), // Thread handle not inheritable false, // Set handle inheritance to FALSE U32(0), // No creation flags U8(0), // Use parent's environment block U8(0),

11:10 <triangle345> wondering if I'm passing in the pointer properly the way pony intended?

11:10 <doublec> I think it got chopped off

11:11 <triangle345> let me put it up on pastebin

11:11 <doublec> But that last parameter, being an out parameter, should use addressof

11:11 <triangle345> http://pastebin.com/iCU3y5DB

11:11 <triangle345> addressof the primitive right?

11:11 <triangle345> or do i need actual structs?

11:12 <doublec> triangle345: addressf the actual struct

11:12 <triangle345> i have a working example

11:13 <triangle345> let me put it up on pastebin

11:13 <triangle345> for c

11:13 <triangle345> http://pastebin.com/UGcWbBG0

11:13 <triangle345> this is my working c example

11:15 <doublec> So you need to map the C structures for STARTUPINFO and PROCESS_INFORMATION info Pony objects

11:16 <triangle345> oh man

11:16 <doublec> One way is describe here, using tuples: https://tutorial.ponylang.org/c-ffi/calling-c.html

11:16 <triangle345> startup info is huge lol

11:16 <triangle345> so i tried doing that as well.. let me paste how i mapped them

11:16 <doublec> Another way is using 'Struct'

11:16 <triangle345> yep

11:16 <triangle345> http://pastebin.com/AsLpYyZD

11:17 <triangle345> exactly what i did

11:17 <doublec> Ah, good

11:17 <triangle345> atleast the way with the primitives it crashes but with these structs i get nothing

11:17 <doublec> so then: var si: Startupinfo

11:17 <doublec> and pass to CreateProcessas: addressof si

11:18 <triangle345> nothing happens

11:18 <triangle345> no crash or anything

11:18 <Praetonus> triangle345: What is the parameter declaration in C?

11:18 <triangle345> addressof si,

11:19 <triangle345> var si:StartupInfo = StartupInfo

11:19 <triangle345> maybe i messed up some type mapping in that struct?

11:20 <Praetonus> addressof somestruct yields a somestruct** in C

11:20 <doublec> Hmm, is it MaybePointer that is needed?

11:20 <Praetonus> If the C parameter is a pointer to a struct, you shouldn't use addressof in Pony

11:20 <Praetonus> Just pass the struct as is

11:21 <Praetonus> doublec: MaybePointer is needed for C functions returning potentialy NULL pointers

11:21 <doublec> Praetonus: C func is taking a SomeStruct*

11:21 <doublec> Praetonus: so looks like you're right about just passing the struct var

11:22 <triangle345> yea still nothing

11:22 <triangle345> same result

11:23 <doublec> triangle345: So no crash, just createprocess not doing what you expect?

11:23 <triangle345> its doing nothing , yea

11:23 <triangle345> so startupinfo struct in c

11:23 <triangle345> has stuff like lpcstr(constant string)

11:23 <triangle345> and handle

11:23 <triangle345> in pony can i just zero those out with U8?

11:23 <triangle345> or do i actually need Ponter[U8] for string?

11:23 <triangle345> and for handle

11:24 <triangle345> handle is like a void*

11:24 <doublec> Have you mapped the structures correctly?

11:25 <doublec> triangle345: you have lpReserved2 as an U8, but it's a pointer in the C structure

11:25 <triangle345> right so i thought i would just zero it out

11:25 <triangle345> with U8 zero

11:25 <doublec> triangle345: So in your structure it's size 1 byte, in the real structure it's size of a pointer

11:27 <doublec> ditto with the handles

11:27 <triangle345> lpbyte is just a pointer to a byte

11:27 <triangle345> so all of that would get mapped to Pointer[U8] in pony?

11:28 <doublec> I assume that works in Pony struct definitions

11:28 <doublec> You also need to set the 'cb' member of the structure to its size

11:29 <doublec> Try calling GetLastError to find out why createprocess if failing

11:29 <triangle345> thats a good point

11:29 <triangle345> will def try that.

11:29 <triangle345> well i need to head out to work.. thanks a ton for your help

11:29 <doublec> I suspect it's errors in the structure setup

11:29 <doublec> np

11:29 <doublec> good luck!

12:07 <Candle> doublec: You were asking about package management for pony the other day: https://github.com/CandleCandle/pony-maven-plugin / http://search.maven.org/#search%7Cga%7C1%7Ca%3A%22pony-maven-plugin%22

12:23 <doublec> Candle: nice, I'll give it a try

12:27 <Candle> doublec: Certainly has rough edges and missing bits. I should get issue #2 done this weekend.

15:32 <TwoNotes> No crashes yet on ARM regarding issue #1000

15:41 <Praetonus> Great

16:34 <jemc> cool!

17:10 <TwoNotes> So is the mutex gone now, replaced by just proper atomic ops?

17:13 <Praetonus> Yes, no mutex here