Re: Tasks and C/C++ code.

[Mats Weber <Mats.Weber@elca-matrix.ch>]

"Barry L. Dorough" wrote:
> 
>     I am working on a project where we need to call the same C function
> from multiple tasks.  I am wondering how to do this safely.  Can I make
> a generic with my C pragma defined there are do I need to define the
> prama in the task type so each task will have its own copy of the C
> function.

Doing it either way won't change anything, the result will be exactly
the same: there will be only one copy of the C function, possibly being
called concurrently by more than one Ada task.

What you have to make sure is that your C function is task-safe, or
thread-safe in the pthreads terminology. Look at its use of global
variables and non thread-safe system calls, among others (e.g.
gethostbyname is generally not thread-safe).