D Language 2.0

["Jérôme M. Berger"]

Andrei Alexandrescu wrote:
> Andrei Alexandrescu wrote:
>> Nick Sabalausky wrote:
>> [snip]
>>> It's been no worse at threading than C/C++ for quite some time. It's
>>> just starting to have a threading model that kicks the crap out of
>>> the threading in the vast majority of languages out there.
>>
>> BTW, that effort is going quite well. For example, a producer-consumer
>> file copy program using the proposed API has 20 lines, correctness and
>> all.
>>
>> import std.algorithm, std.concurrency, std.stdio;
>>
>> void main() {
>>    enum bufferSize = 1024 * 100;
>>    auto tid = spawn(&writer);
>>    // Read loop
>>    auto src = stdin.by!(ubyte)();
>>    for (;;) {
>>       auto buffer = UniqueArray!(ubyte)(bufferSize);
>>       auto length = copy(take(src, bufferSize), buffer).length;
>>       send(tid, move(buffer));
>>       if (length == 0) break;
>>    }
>> }
>>
>> void writer() {
>>    // Write loop
>>    auto tgt = stdout.by!(ubyte)();
>>    for (;;) {
>>       auto buffer = receiveOnly!(UniqueArray!ubyte)();
>>       copy(buffer, tgt);
>>    }
>> }
>>
>>
>> Andrei
> 
> Sorry for the monologue. Actually I reworked the example into the even
> simpler:
> 
> import std.concurrency, std.stdio;
> 
> void main() {
>    enum bufferSize = 1024 * 100;
>    auto tid = spawn(&writer);
>    // Read loop
>    foreach (immutable(ubyte)[] buffer; stdin.byChunk(bufferSize)) {
>       send(tid, buffer);
>    }
> }
> 
> void writer() {
>    // Write loop
>    for (;;) {
>       auto buffer = receiveOnly!(immutable(ubyte)[])();
>       tgt.rawWrite(buffer);
>    }
> }
> 
> We actually have implemented all the pieces to make this work.
> 
	Shouldn't you declare "tgt" somewhere (you did in your first example...

		Jerome
-- 
mailto:jeberger at free.fr
http://jeberger.free.fr
Jabber: jeberger at jabber.fr

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