ok, can you reload development version and try again? ps: this is easier on slack ;)
> On 01 Jul 2016, at 14:00, Esteban Lorenzano <esteba...@gmail.com> wrote: > > yes, I made a mistake… the problem of not being capable of test here :( > > 1 minute. > > Esteban > >> On 01 Jul 2016, at 13:56, Julien Delplanque <jul...@tamere.eu> wrote: >> >> Ok, now I get a different exception! :-) >> >> "MessageNotUnderstood: LUDevice class>>fromHandle:" >> >> when executing: "array first." >> >> Where LUDevice is defined like this: >> >> FFIOpaqueObject subclass: #LUDevice >> instanceVariableNames: '' >> classVariableNames: '' >> package: 'LibUsb-Kernel' >> >> Julien >> >> >> On 01/07/16 13:51, Esteban Lorenzano wrote: >>> I need you to test :) >>> >>> can you execute this: >>> >>> (ConfigurationOfUnifiedFFI project version: #development) load. >>> >>> and then retry your example? >>> >>> thanks, >>> Esteban >>> >>> ps: this became pharo-dev, but well… still here :) >>> >>>> On 01 Jul 2016, at 13:48, Julien Delplanque <jul...@tamere.eu> wrote: >>>> >>>> Oh, ok :p >>>> >>>> Can you notify me know when the bug will be resolved? >>>> >>>> Thanks, >>>> >>>> Julien >>>> >>>> >>>> On 01/07/16 13:36, Esteban Lorenzano wrote: >>>>> … and now you hit a bug. >>>>> bah, an “non implemented feature” :P >>>>> >>>>> I never tested arrays with complex types. >>>>> it should not be hard… I will provide a fix. >>>>> >>>>> Esteban >>>>> >>>>> >>>>>> On 01 Jul 2016, at 13:30, Julien Delplanque <jul...@tamere.eu> wrote: >>>>>> >>>>>> Ok, the ffi call is done without problem with your method thanks. :) >>>>>> >>>>>> But now that I have the array, when I try to access the first element >>>>>> using: >>>>>> >>>>>> array first. >>>>>> >>>>>> I get a exception saying I need to override a method: >>>>>> >>>>>> "SubclassResponsibility: FFIOpaqueObjectType had the subclass >>>>>> responsibility to implement #basicHandle:at:" >>>>>> >>>>>> I looked at others implementors but I am not sure of how I should >>>>>> override it, nor if I should. >>>>>> >>>>>> Thanks for the time your taking to answer me. :-) >>>>>> >>>>>> Julien >>>>>> >>>>>> On 01/07/16 12:29, Esteban Lorenzano wrote: >>>>>>>> On 01 Jul 2016, at 12:27, Esteban Lorenzano <esteba...@gmail.com> >>>>>>>> wrote: >>>>>>>> >>>>>>>> hi, >>>>>>>> >>>>>>>> this is because you want to get an array with opaque objects. Do not >>>>>>>> let the *** confuses you… cwhat you actually want, conceptually is >>>>>>>> something like this: >>>>>>>> >>>>>>>> *((FFIOpaqueObject*)[]) >>>>>>>> >>>>>>>> means: you pass the address of an array of opaque types (who are >>>>>>>> always pointers). >>>>>>>> >>>>>>>> So, what you need to pass is the address of an array… you will need to >>>>>>>> work a bit here, since translation is not automatic. >>>>>>>> >>>>>>>> 1) you need to declare your type. Let’ say it will be: >>>>>>>> >>>>>>>> FFIOpaqueObject subclass: USBDevice. >>>>>>>> >>>>>>>> 2) then you need to get the pointer to this array. You need to rewrite >>>>>>>> you code as this: >>>>>>>> >>>>>>>> arrayPtr := ExternalAddress new. >>>>>>>> size := self getDevice: ctx list: arrayPtr. >>>>>>>> >>>>>>>> getDevice: ctx list: list >>>>>>>> ^ self ffiCall: #(size_t libusb_get_device_list (libusb_context >>>>>>>> *ctx, void **list)) >>>>>>>> >>>>>>>> NOTE that we change the type to "void **”. This is because this is >>>>>>>> what you actually want: the array of devices >>>>>>>> >>>>>>>> 3) now you will have size and arrayPtr. Then you declare the array: >>>>>>>> >>>>>>>> array := FFIExternalArray fromPointer: arrayPtr type: USBDevice >>>>>>> sorry, this expression (while possible) does not stops in “size”… it >>>>>>> has to be like this, instead: >>>>>>> >>>>>>> array := FFIExternalArray fromPointer: arrayPtr type: USBDevice size: >>>>>>> size. “you already has the size for the result" >>>>>>> >>>>>>>> … and you should be able to iterate this array normally :) >>>>>>>> >>>>>>>> let me know if this works for you… I’m “coding in mail client”, so it >>>>>>>> can fail :P >>>>>>>> >>>>>>>> cheers, >>>>>>>> Esteban >>>>>>>> >>>>>>>> >>>>>>>>> On 01 Jul 2016, at 12:02, Julien Delplanque <jul...@tamere.eu> wrote: >>>>>>>>> >>>>>>>>> Thanks, it works I get an instance of FFIOpaqueObject. >>>>>>>>> >>>>>>>>> But how do I get a specific libusb_device object from the list? >>>>>>>>> >>>>>>>>> Thanks again for you quick answer :-). >>>>>>>>> >>>>>>>>> Julien >>>>>>>>> >>>>>>>>> On 01/07/16 11:44, Esteban Lorenzano wrote: >>>>>>>>>> Hi, >>>>>>>>>> >>>>>>>>>> an opaque structure is not an FFIExternalObject but an >>>>>>>>>> FFIOpaqueObject. >>>>>>>>>> in that case, something like (simplified): >>>>>>>>>> >>>>>>>>>> ctx := (your context). >>>>>>>>>> list := FFIOpaqueObject new. >>>>>>>>>> size := self getDevice: ctx list: list. >>>>>>>>>> >>>>>>>>>> getDevice: ctx list: list >>>>>>>>>> ^ self ffiCall: #(size_t libusb_get_device_list (libusb_context >>>>>>>>>> *ctx, FFIOpaqueObject ***list)) >>>>>>>>>> >>>>>>>>>> should work (note that of course you can make libusb_device an alias >>>>>>>>>> for your type… that does not matters much, this is just a >>>>>>>>>> simplification). >>>>>>>>>> >>>>>>>>>> if this does not works, if you can provide me code to reproduce it, >>>>>>>>>> I can give it a shot and see what happens :) >>>>>>>>>> >>>>>>>>>> Esteban >>>>>>>>>> >>>>>>>>>>> On 01 Jul 2016, at 11:19, Julien Delplanque <jul...@tamere.eu> >>>>>>>>>>> wrote: >>>>>>>>>>> >>>>>>>>>>> Hello everyone, >>>>>>>>>>> >>>>>>>>>>> I have a question about the UFFI API. I have the following function: >>>>>>>>>>> >>>>>>>>>>> ssize_t libusb_get_device_list (libusb_context *ctx, libusb_device >>>>>>>>>>> ***list) >>>>>>>>>>> >>>>>>>>>>> where libusb_device is an opaque structure. >>>>>>>>>>> >>>>>>>>>>> I made a type mapping "ssize_t" -> "int" and an object inheriting >>>>>>>>>>> from FFIExternalObject for the "libusb_context" (others methods >>>>>>>>>>> using it are working). >>>>>>>>>>> >>>>>>>>>>> I can not find how to get an array filled with libusb_device using >>>>>>>>>>> UFFI from Pharo. :-( >>>>>>>>>>> >>>>>>>>>>> Thanks in advance, >>>>>>>>>>> >>>>>>>>>>> Julien >>>>>>>>>>> >>>> >>> >> >> >
