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gary-rowe / hid4java

A cross-platform Java Native Access (JNA) wrapper for the libusb/hidapi library. Works out of the box on Windows/Mac/Linux.
MIT License
229 stars 71 forks source link

Memory leak #68

Closed NeacsuCristian closed 4 years ago

NeacsuCristian commented 6 years ago

Hello,

First I want to congratulate you for this awesome project. Secondly, I want to report you a small bug (maybe a naive usage from my side of the package). Let's assume we have have a dumb function like this: public static void test(HidDevice usbDevice) { usbDevice.open(); usbDevice.close(); }

If this will be called in a while(true) loop, after some hundreds of iterations will fail with

A fatal error has been detected by the Java Runtime Environment: SIGSEGV (0xb) at pc=0x00007f9e35a7e75f, pid=26086, tid=0x00007f9e1572e700

I figure out this, due to the fact that every time I was sending a command through USB I was opening and closing the port. (not practical at all, but still it should work). If you open/close the port only once, the reading and writing commands are working flow-less.

Hopefully this observation might help in the future. Cristian-Stefan

gary-rowe commented 6 years ago

Hi! I'll be working on this library starting Mon 16th April in order to release version 0.6.0. I can take a look at this issue then.

darrazo commented 5 years ago

Hi Gary, thanks a lot for the work on this great library! is the 0.6.0 release still planned?

gary-rowe commented 4 years ago

@darrazo Yes, I've finally cleared my schedule enough to get back to work on this project. Lots of clearing up to do.

This might be related to #81 since it's a native issue. I'll treat it as a duplicate and handle issues there.