Falcon prog'lang features support concurrency

3.11: adda/lang/falcon:


choice of Falcon-ada over Python-c:

Falcon supports many programming paradigms,
including those supported by Python,
but additionally message oriented and tabular.
Finally, it seems to have builtin in concurrency support,
rather than supporting it as an after-thought
like Python
- and concurrency was one of AuroraUX's stated goals.

[3.29: AuroraUX Operating system:
AuroraUX operating system is robust via
Ada-coded Unix Shell Interpreter,
and OpenGL library toolkit .
. user can access software from
DragonFly BSD, Solaris, GNU/Linux 2.6
via ABI system call emulation .
. scripting with FalconPL, Perl and Lua
. user space coding with Clang/LLVM tool chain .]

Falcon's creator Giancarlo Niccolai 2009:

. went open source in 2009;
falcon is based on C++, whose Virtual Calls
are actually more efficient than
the switches [needed by objectified c coding] .
[3.29: supported by Kross?
Kross is the scripting framework for KDE 4;
a scripting framework allows binding of
arbitrary scripting languages
to the object system .
. kde's currently available scripting engines
include Python, Ruby, JavaScript and Falcon PL .]
BlastWave's Dennis Clarke is Falcon-coding the
BlastWave open source package repository Web interface
and is helping in porting all the Falcon codebase
to Sun platforms – the AuroraUX SunOS distro
has adopted Falcon as its official scripting language .

. many no-way-back points in the design,
[and at least one reversal:]
. dropped support for stateful functions,
(for building stateful machines)
because every function's {enter, exit}
was spending time checking whether
its instance was stateful .

a brief tutorial:
. comprehensive overview .

Falcon applauds AuroraUX:
. try out AuroraUX, an emerging Open Solaris
distribution that comes with Falcon .

falcon vs python, lua, ...:

. like php it supports [Document Templates]:
ie, embeds scripts into text document.
(basis for server-side dynamic page generation) .
. like lua it has coroutines,
and prototype-orientation .
. uniquely provides "compile-time metaprogramming",
full multi-threading,
native internationalization,
{functional, tabular, message} programming

--[ . they wouldn't call python even partially functional?
. the facts page calls coroutines
lightweight parallelism -- where the vm provides
time slicing and context switches;
I thought that was what threads were .
. according to lua, coroutines are
cooperative multitasking featuring yields,
where it yields control to a particular sub:
instead of calling that sub,
it is resuming where that sub last yielded .]

3.16: bk,web:
. wikipedia.org's Falcon concurrency .

explore falcon's groups:
. includes interfaces supporting various orientations:
. the mop ( message-oriented programming) interface
is this:

VMSlot: VM Interface for mop operations.
getSlot: Retreives a MOP Message slot.
subscribe: Registers a callback to a message slot.
unsubscribe(a callback): Unregisters from a slot.
assert(on a msg`slot): Creates assertion .
retract: Removes a previous assertion on a message.
getAssert: an assertion.
consume: use the currently broadcasted signal .
broadcast: to every callable item subscribed to a message.