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digitalmars.D.learn - What wrong?

reply "Fyodor Ustinov" <ufm ufm.su> writes:
Simple code:

http://pastebin.com/raw.php?i=7jVeMFXQ

This code works compiled by DMD v2.066.1 and LDC2 (0.15.1) based 
on DMD v2.066.1 and LLVM 3.5.0.

$ ./z
TUQLUE
42
11

Compiled by DMD v2.067.1 the program crashes:
$ ./aa
TUQLUE
Segmentation fault

What I'm doing wrong?
May 01 2015
next sibling parent reply "Dennis Ritchie" <dennis.ritchie mail.ru> writes:
On Saturday, 2 May 2015 at 02:51:52 UTC, Fyodor Ustinov wrote:

 Simple code:

 http://pastebin.com/raw.php?i=7jVeMFXQ

 This code works compiled by DMD v2.066.1 and LDC2 (0.15.1) 
 based on DMD v2.066.1 and LLVM 3.5.0.

 $ ./z
 TUQLUE
 42
 11

 Compiled by DMD v2.067.1 the program crashes:
 $ ./aa
 TUQLUE
 Segmentation fault

 What I'm doing wrong?



I think the problem is in these lines:

-----
receive(
	(supervisorAnswer a) => r = a.ret
);

Partially it works :)

-----
import std.variant;

private struct Exit{};
private struct supervisorAnswer {
	Variant ret;
}

private __gshared Tid supervisorTid;

private void supervisor() {
	static Variant[string] zval;
	bool done = false;
	void _store(T)(string k, T v) {
		assert(k.length > 0);
		zval[k] = v;
	}
	
	void _get(Tid id, string k) {
		id.send(supervisorAnswer(zval.get(k, Variant("NOTFOUND"))));
	}
	
	while (!done) {
		supervisorAnswer answer;
		receive(
			(Exit s) { done = true; },
			&_store!long,
			&_store!ulong,
			&_store!int,
			&_store!uint,
			&_store!float,
			&_store!double,
			&_store!string,
			&_store!Variant,
			&_get,
			(Variant e) {  writeln(e); },
			);
	}
}

Variant Get(const string s) {
	Variant r;
	supervisorTid.send(thisTid, s);
	writeln("TUQLUE");
	/*receive(
		(supervisorAnswer a) => r = a.ret
		);*/
	writeln("42");
	return r;
}

void Set(T)(const string s, T v) {
	supervisorTid.send(s, v);
}

shared static this() {
	supervisorTid = spawn(&supervisor);
}

shared static ~this() {
	send(supervisorTid, Exit());
}

void main() {
	Set("1", 11);
	writeln(Get("1"));
	send(supervisorTid, Exit());
	thread_joinAll();
}
May 02 2015
parent reply "Fyodor Ustinov" <ufm ufm.su> writes:
On Saturday, 2 May 2015 at 19:13:45 UTC, Dennis Ritchie wrote:

 On Saturday, 2 May 2015 at 02:51:52 UTC, Fyodor Ustinov wrote:

 Simple code:

 http://pastebin.com/raw.php?i=7jVeMFXQ

 This code works compiled by DMD v2.066.1 and LDC2 (0.15.1) 
 based on DMD v2.066.1 and LLVM 3.5.0.

 $ ./z
 TUQLUE
 42
 11

 Compiled by DMD v2.067.1 the program crashes:
 $ ./aa
 TUQLUE
 Segmentation fault

 What I'm doing wrong?



 I think the problem is in these lines:

 -----
 receive(
 	(supervisorAnswer a) => r = a.ret
 );

 Partially it works :)


I see it by the lack of "42". :)

But why is this "receive" breaks down?
May 02 2015
parent reply "Dennis Ritchie" <dennis.ritchie mail.ru> writes:
On Saturday, 2 May 2015 at 19:38:01 UTC, Fyodor Ustinov wrote:

 I see it by the lack of "42". :)

 But why is this "receive" breaks down?


Report, please, about it (D)evepopers :)
https://issues.dlang.org/
May 02 2015
parent reply "Fyodor Ustinov" <ufm ufm.su> writes:
On Saturday, 2 May 2015 at 20:46:32 UTC, Dennis Ritchie wrote:

 On Saturday, 2 May 2015 at 19:38:01 UTC, Fyodor Ustinov wrote:

 I see it by the lack of "42". :)

 But why is this "receive" breaks down?


 Report, please, about it (D)evepopers :)
 https://issues.dlang.org/


I'm not sure that it's not my fault. So I hope that will come by 
knowledgeable people and say "Hey, buddy, your mistake is..." :)
May 03 2015
next sibling parent "Dennis Ritchie" <dennis.ritchie mail.ru> writes:
On Monday, 4 May 2015 at 01:03:43 UTC, Fyodor Ustinov wrote:

 I'm not sure that it's not my fault. So I hope that will come 
 by knowledgeable people and say "Hey, buddy, your mistake 
 is..." :)


OK. But if one does not come within three days :), duplicate 
topic in this section:
http://forum.dlang.org/group/digitalmars.D
May 03 2015
prev sibling parent reply "sclytrack" <sclytrack fake.com> writes:
On Monday, 4 May 2015 at 01:03:43 UTC, Fyodor Ustinov wrote:

 On Saturday, 2 May 2015 at 20:46:32 UTC, Dennis Ritchie wrote:

 On Saturday, 2 May 2015 at 19:38:01 UTC, Fyodor Ustinov wrote:

 I see it by the lack of "42". :)

 But why is this "receive" breaks down?







import std.stdio;
import std.concurrency;

struct Answer
{
         int number = 10;
         ~this()
         {
                 writeln(number);
         }
}

void threadRoutine()
{
   receive(
        (int value){ }          //handle question
   );

   ownerTid.send( Answer() );   //answer
}

void main()
{
         Tid childId = spawn(&threadRoutine);
         childId.send(100);              //question
         receive((Answer t) {});         //answer
}


//DMD64 D Compiler v2.067.1

/*
10
10
10
10
10
10
10
10
10
10
10
7080544
10
10
10
*/
May 05 2015
parent "sclytrack" <sclytrack fake.com> writes:
On Tuesday, 5 May 2015 at 07:41:04 UTC, sclytrack wrote:

 On Monday, 4 May 2015 at 01:03:43 UTC, Fyodor Ustinov wrote:

 On Saturday, 2 May 2015 at 20:46:32 UTC, Dennis Ritchie wrote:

 On Saturday, 2 May 2015 at 19:38:01 UTC, Fyodor Ustinov wrote:

 I see it by the lack of "42". :)

 But why is this "receive" breaks down?









import std.stdio;
import std.variant;

struct SoMany
{
         int number = 10;
         ~this()
         {
                 writeln(number);
         }
}

void main()
{
         Variant v = SoMany();
}


DMD64 D Compiler v2.067.1
10
10
10
10
gdc (Debian 4.9.2-10) 4.9.2
10
10


For DMD I'm getting 4x10 and for gdc 2x10
May 14 2015
prev sibling next sibling parent reply "thedeemon" <dlang thedeemon.com> writes:
On Saturday, 2 May 2015 at 02:51:52 UTC, Fyodor Ustinov wrote:

 Simple code:

 http://pastebin.com/raw.php?i=7jVeMFXQ

 What I'm doing wrong?


Try using class instead of struct.
Last time I played with std.concurrency it used Variants to store 
the messages, so when something bigger than a little basic value 
or a reference, like a class object, is sent it behaves 
unpredictably: can crash or shit garbage. Trying to send structs 
larger than ~20 bytes usually caused problems.
May 15 2015
parent reply "Gary Willoughby" <dev nomad.so> writes:
On Friday, 15 May 2015 at 07:51:29 UTC, thedeemon wrote:

 On Saturday, 2 May 2015 at 02:51:52 UTC, Fyodor Ustinov wrote:

 Simple code:

 http://pastebin.com/raw.php?i=7jVeMFXQ

 What I'm doing wrong?


 Try using class instead of struct.
 Last time I played with std.concurrency it used Variants to 
 store the messages, so when something bigger than a little 
 basic value or a reference, like a class object, is sent it 
 behaves unpredictably: can crash or shit garbage. Trying to 
 send structs larger than ~20 bytes usually caused problems.


Please raise a bugzilla issue for this.
May 15 2015
parent "Daniel Kozak" <kozzi11 gmail.com> writes:
On Friday, 15 May 2015 at 09:20:32 UTC, Gary Willoughby wrote:

 On Friday, 15 May 2015 at 07:51:29 UTC, thedeemon wrote:

 On Saturday, 2 May 2015 at 02:51:52 UTC, Fyodor Ustinov wrote:

 Simple code:

 http://pastebin.com/raw.php?i=7jVeMFXQ

 What I'm doing wrong?


 Try using class instead of struct.
 Last time I played with std.concurrency it used Variants to 
 store the messages, so when something bigger than a little 
 basic value or a reference, like a class object, is sent it 
 behaves unpredictably: can crash or shit garbage. Trying to 
 send structs larger than ~20 bytes usually caused problems.


 Please raise a bugzilla issue for this.


this commit cause the issue:
https://github.com/D-Programming-Language/phobos/commit/45fda72192ff5b878ebe915db0ffb9f6504cca8f

but it is probably just a trigger not a real cause.
May 15 2015
prev sibling parent "anonymous" <anonymous example.com> writes:
On Saturday, 2 May 2015 at 02:51:52 UTC, Fyodor Ustinov wrote:

 Simple code:

 http://pastebin.com/raw.php?i=7jVeMFXQ

 This code works compiled by DMD v2.066.1 and LDC2 (0.15.1) 
 based on DMD v2.066.1 and LLVM 3.5.0.

 $ ./z
 TUQLUE
 42
 11

 Compiled by DMD v2.067.1 the program crashes:
 $ ./aa
 TUQLUE
 Segmentation fault

 What I'm doing wrong?


(Copying my reply to the post in the main group here:)

I investigated this further. std.variant is to blame. I filed an 
issue an made a pull request to fix it:

https://issues.dlang.org/show_bug.cgi?id=14585
https://github.com/D-Programming-Language/phobos/pull/3284
May 15 2015