Eberhard Fahle wrote:
> On Tuesday 23 October 2007 16:55:40 Paolo Chiarabaglio wrote:
>> Well,
>> What I'm looking for is something like a shared memory space, (like a
>> double port RAM for electronic engineers!) where the two programs place
>> their data in fixed locations and then they read it. Every single
>> locations has the same meaning for both applications.
> If your PHP _and_ C-applications will always run on the same machine shared
> memory is also an option not mentioned yet.
>
Sharing a memory space is not as simple as open a named pipe.
However for fast access to great amount of data it's better,
expecially when the random access is the most common condition.
>> I don't know it this thing exists or if it is easy to implement, otherwise
>> I'll take a better look at pipes.
> I would rather consider to go for an implementation with sockets because :
> 1) Every programming language supports sockets. If one day you need to change
> your PHP-part to Flash (Actionscript), Java, Ruby , you name it there will
> always be a way to talk to your C-applications through sockets.
>
> 2) If you have to split your application with the C-Part running on the Fox
> and the PHP-Part running somewhere else on a remote machine, this is not a
> big deal with sockets. With pipes you will find yourself rewriting a lot of
> your code (and implementing sockets for that in the end).
>
> 3) There is a wealth of information about socket-programming in every
> language. Every decent book about Linux System Programming has chapters on
> network-programming with sockets and pipes too. I never used PHP but it knows
> how to handle sockets. Don't know about support of pipes with PHP.
>
I design a system in which a daemon written in C/C++ controls and read
circuits and share information thought sockets because PHP code would
run every where and not on the same computer. Sockets are easy not as
easy like files but depends on habits.
Cheers,
Roberto
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