I developed a server using epoll. It works fine under Linux. But I want to give macosx support using kqueue. I heard that libevent is a abstraction layer on top of these event based libraries(epoll, kqueue).
How can i port this code using epoll to libevent? example code: https://banu.com/blog/2/how-to-use-epoll-a-complete-example-in-c/epoll-example.c Is it possible (%100 compatible)?
Yes, it is possible to alter parts of this code to use libevent instead of epoll. You will have to read libevent documentation in order to known exactly what you have to do, though.
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I'm interested is it possible to install and use Android Things(former Brillo) on custom produced hardware?
I can see from the official documentation there is preselected and certified SoMs listed, but I'm interested in using my own hardware.
Is it possible to have best of both worlds - use the familiar to me Android & Android Things but run it on proprietary hardware?
If not, what other options do I have - I researched about micropython, but apparently it seems it also comes with designated board(pyboard).
So my question is what are options to not thinks too much about the firmware on the device(and write C code), but focus on more higher-level business logic and programming languages(Java, Python).
Android Things isn't open source, so you can't put it into that isn't officially supported.
If you're looking for custom options, you will need to find a compiled language like C that works for that board. While C may be a bit intimidating, you may be able to find languages that compile to similar machine code. Rust and Go may work on microcontrollers too if you check.
I'm not too familiar with micro python. It says that it compiles to bare metal/machine code, so I believe you should be able to use it on other boards. While they may officially support the compiler for one board, the community may have support for additional microcontrollers.
Is there any way to implement MQTT protocol on Ingenico's POS devices? I am currently working on iCT220 on which I want to implement IOT project. In this project, I will be sending some bytes (may be 400-1000 bytes) of data to the broker (server).
There are lots of source codes for the library available in the internet, but all make use of Linux or Windows socket libraries, where as Ingenico's devices come with proprietary libraries.
Have anyone implemented similar project on the same devices? Can anyone guide me to the process of implementation?
Thanks in advance,
Pankaj
Surely, you will need to build it from source.
I had a look at several client libraries and it looks that dependencies come mostly from IP stack, so there's very little to be implemented to have it running.
You should expect the proprietary OS issues to be thing of the past in short time - newer terminal lines are based on linux.
I was looking for some Windows API that will give me notification for any change in the Local Area Connection Properties.I tried Searching for the Entry in the Registry which it modifies after we check or uncheck the driver name but could find it.
I have also attached an image if any one has any confusion in understanding my question.
Any guidance would be appreciated.
What you need is the Windows API for Network Awareness. It would be great if Delphi example implementations were readily available but they are not. The API's are all COM interfaces and you will have to find out how to use these within Delphi yourself. That is another question. However, for the INetworkConnection, this may get you started.
I am trying to build a very simple driver. Its sole purpose will be to register "PsSetCreateProcessNotifyRoutine" and on callbacks recieved from kernel, notify my Win32 application about which proccesses are started and stoped.
I only know how to build such a simple driver with "DriverEntry" and "DriverUnload" and compile it with DDK. But I don't know how to actually implement communication. I know it can be done with IOCTL. But beyond that I am in the dark. I cannot find simple example of how to do that in Delphi. I only know it can be done.
So what I am looking for is some simple and understandable tutorial on how to do it or event better an example delphi program with acompaniying driver code. Maybe there are even other ways of communication.
Any help would be appriciated.
Doesn't matter if in Delphi or not. You have to use the function DeviceIoControl. Read the article in MSDN about it.
In short, you'll have to choose some IOCTL codes from the available set. Then you call DeviceIoControl with one of these codes and pass some data, and in driver you handle that request and return something else.
You can also handle standard IOCTLS, such as the ones generated by calling ReadFile or WriteFile in user-mode.
Don't look for a "tutorial how to do that in Delphi", just look for any tutorial. They're all the same, no matter the language, it's pure Win32/Native api stuff. Here's one for example, just googled it out.
Every indication I have, based on my experience in embedded computing is that doing something like this would require expensive equipment to get access to the platform (ICE debuggers, JTAG probes, I2C programmers, etc, etc), but I've always wondered if some ambitious hacker out there has found a way to load native code on a Blackberry device. Anyone?
Edit: I'm aware of the published SDK and it's attendant restrictions. I'm curious if anyone has attempted to get around them, and if so, how far they got.
I've seen this question pop up in a number of different forums over time. The original Blackberries were programmable in C++ but I think that RIM ran up against the problems of trying to implement a secure platform in the C/C++ compile to native paradigm.
The devices do have JTAG ports, but unless one could get hands on the RIM code as a place to start the problem is enormous.
I also have to wonder how useful a Blackberry with a replacement FOSS operating system would be, since it would not likely have the protocols to connect to BES or BIS, send PIN's etc. If one was simply looking for a the power of the hand held computing platform I suspect there are many more likely candidates available.
No, C++ is no longer a supported RIM development tool, as they phased it out a number of years ago. Client applications can be developed in Java (or one of a few 5GL frameworks), and web + sever-side apps can be developed using standard tools.
For those looking for updated information, the new Playbook os, also known as QNX, also known as Blackberry 10 (or it will be when the phones running it come out) is in fact c/c++ based, also using QML and a C++ add on called Cascades.
Unfortunately the official SDK website only seems to mention Java. According to wikipedia, different versions of the BlackBerry use different processors. Combined with the fact that RIM uses a proprietary operating system for the devices, it becomes pretty difficult to develop native code without official tools. There is also a partial API-level security restriction which would further prohibit advanced tinkering.
Just randomly searching for an answer to this and came across http://supportforums.blackberry.com/t5/Tablet-OS-SDK-for-Adobe-AIR/Native-C-C-SDK/td-p/778009 which mentions that BB intend to release a C/C++ SDK soon, more details will be provided at the 2011 Game Developer Conference.