andrew babanin wrote:
2009/1/21 Joel Sherrill <joel.sherr...@oarcorp.com>:
I think this would have been useful on at least one project
in my history. :)
Ian mentioned embedded systems in an earlier question
and I am still unsure what you require of the OS in terms
of services to work. Cygwin is very close to a "real UNIX"
from a programming viewpoint.
+ What do you require of the threading support?
+ Network services?
+ filesystem?
+ etc
Hello.
To work wrapper-compiler requires only libc, you can see it in the source.
Compiler input/output implemented using mmap system call, and
the process of language extension is like filtering the source -
reading from one place of image and writing to another place of memory image.
So I think compiler can compiled on every platform.
(The problem with CygWin is that, my compiler requires file metadata
in one place,
but dirent struct is different on Win platform, but it is not hard to
reimplement).
Threading support is only deal with POSIX threads. You can create __threaded
functions and __mutual varibles, wрich will be automatically locked
and unlocked,
before addressing.
CRPC has it's own network protocol, based on BSD sockets and implemented in
CRPC library. It is very easy, no external servicies are needed, as
compiler helps
with distinguishing remote functions
(using 32-bit checksum calculated from the prototype text).
Is the marshalling and encoding based upon anything
standard?
Does it support RPC's across heterogeneous hosts?
RTEMS is a single process, multithreaded RTOS with
a port of the FreeBSD TCP/IP stack. Do you think that
would that be sufficient to run on?
I thing it will be sufficient to run on it, but I have not ever tested
on this systems.
I will try to test on it.
Am I answered you questions?
I think so. The run-time assumes POSIX threads and BSD sockets
and (I assume) POSIX mutex for the locking.
Depending on how things go with the merge, it probably makes
sense to switch to the gcc portability wrappers for threading
and mutexes. But it is up to others on merging. I was just
trying to clarify the run-time requirements. :)
Thanks.
--
Joel Sherrill, Ph.D. Director of Research & Development
joel.sherr...@oarcorp.com On-Line Applications Research
Ask me about RTEMS: a free RTOS Huntsville AL 35805
Support Available (256) 722-9985
