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digitalmars.D.learn - Endless static this call when used a thread in it

reply "tcak" <tcak gmail.com> writes:
I have written the following code:

test.d
==============================
import core.thread;
import std.stdio;

void threadFunc(){
	writeln("Thread func");
}

public static this(){
	auto t = new Thread( &threadFunc );
	t.start();

	writeln("Static init");
}

void main(){
      writeln("End of main");
}


run
======================
rdmd test.d


result
======================
Static init
Thread func
Static init
Thread func
Static init
Thread func
Static init
Thread func
Static init
Thread func
Static init
Thread func
Static init
Thread func
Static init
Thread func
Sta...

Is this normal, what's happening?
Jan 13 2015
next sibling parent reply "tcak" <tcak gmail.com> writes:
On Tuesday, 13 January 2015 at 13:53:11 UTC, tcak wrote:
 I have written the following code:

 test.d
 ==============================
 import core.thread;
 import std.stdio;

 void threadFunc(){
 	writeln("Thread func");
 }

 public static this(){
 	auto t = new Thread( &threadFunc );
 	t.start();

 	writeln("Static init");
 }

 void main(){
      writeln("End of main");
 }


 run
 ======================
 rdmd test.d


 result
 ======================
 Static init
 Thread func
 Static init
 Thread func
 Static init
 Thread func
 Static init
 Thread func
 Static init
 Thread func
 Static init
 Thread func
 Static init
 Thread func
 Static init
 Thread func
 Sta...

 Is this normal, what's happening?
When I defined static init with shared public shared static this() it works normal now. But it doesn't explain above issue. What's the relation between a new thread and a module's initialiser?
Jan 13 2015
next sibling parent ketmar via Digitalmars-d-learn <digitalmars-d-learn puremagic.com> writes:
On Tue, 13 Jan 2015 13:56:05 +0000
tcak via Digitalmars-d-learn <digitalmars-d-learn puremagic.com> wrote:

 it works normal now. But it doesn't explain above issue. What's=20
 the relation between a new thread and a module's initialiser?
yes.
Jan 13 2015
prev sibling next sibling parent reply Daniel =?UTF-8?B?S296w6Fr?= via Digitalmars-d-learn writes:
V Tue, 13 Jan 2015 13:56:05 +0000
tcak via Digitalmars-d-learn <digitalmars-d-learn puremagic.com>
napsáno:

 On Tuesday, 13 January 2015 at 13:53:11 UTC, tcak wrote:
 I have written the following code:

 test.d
 ==============================
 import core.thread;
 import std.stdio;

 void threadFunc(){
 	writeln("Thread func");
 }

 public static this(){
 	auto t = new Thread( &threadFunc );
 	t.start();

 	writeln("Static init");
 }

 void main(){
      writeln("End of main");
 }


 run
 ======================
 rdmd test.d


 result
 ======================
 Static init
 Thread func
 Static init
 Thread func
 Static init
 Thread func
 Static init
 Thread func
 Static init
 Thread func
 Static init
 Thread func
 Static init
 Thread func
 Static init
 Thread func
 Sta...

 Is this normal, what's happening?
When I defined static init with shared public shared static this() it works normal now. But it doesn't explain above issue. What's the relation between a new thread and a module's initialiser?
I am not sure but my guess is static this needs to be called before anything else in module so when you try call threadFunc it looks if static this has been called and finished which is not true so it call it again
Jan 13 2015
parent "Daniel Kozak" <kozzi11 gmail.com> writes:
On Tuesday, 13 January 2015 at 14:02:45 UTC, Daniel Kozák via 
Digitalmars-d-learn wrote:
 V Tue, 13 Jan 2015 13:56:05 +0000
 tcak via Digitalmars-d-learn <digitalmars-d-learn puremagic.com>
 napsáno:

 On Tuesday, 13 January 2015 at 13:53:11 UTC, tcak wrote:
 I have written the following code:

 test.d
 ==============================
 import core.thread;
 import std.stdio;

 void threadFunc(){
 	writeln("Thread func");
 }

 public static this(){
 	auto t = new Thread( &threadFunc );
 	t.start();

 	writeln("Static init");
 }

 void main(){
      writeln("End of main");
 }


 run
 ======================
 rdmd test.d


 result
 ======================
 Static init
 Thread func
 Static init
 Thread func
 Static init
 Thread func
 Static init
 Thread func
 Static init
 Thread func
 Static init
 Thread func
 Static init
 Thread func
 Static init
 Thread func
 Sta...

 Is this normal, what's happening?
When I defined static init with shared public shared static this() it works normal now. But it doesn't explain above issue. What's the relation between a new thread and a module's initialiser?
I am not sure but my guess is static this needs to be called before anything else in module so when you try call threadFunc it looks if static this has been called and finished which is not true so it call it again
And here is better explanation http://dlang.org/module.html#staticorder Static constructors are code that gets executed to initialize a module or a class before the main() function gets called. ... Static constructors and static destructors run on thread local data, and are run whenever threads are created or destroyed.
Jan 13 2015
prev sibling parent Steven Schveighoffer <schveiguy yahoo.com> writes:
On 1/13/15 8:56 AM, tcak wrote:
 When I defined static init with shared

 public shared static this()

 it works normal now. But it doesn't explain above issue. What's the
 relation between a new thread and a module's initialiser?
In case it's not clear -- shared static this runs ONCE at the beginning of the program (before main() starts), static this runs for EVERY thread that starts, before the thread starts execution. The reason is that "static this" initializes thread local data. "shared static this" initializes global data (i.e. shared and __gshared). Hope this helps. -Steve
Jan 15 2015
prev sibling parent Daniel =?UTF-8?B?S296w6Fr?= via Digitalmars-d-learn writes:
V Tue, 13 Jan 2015 13:53:09 +0000
tcak via Digitalmars-d-learn <digitalmars-d-learn puremagic.com>
napsáno:

 I have written the following code:
 
 test.d
 ==============================
 import core.thread;
 import std.stdio;
 
 void threadFunc(){
 	writeln("Thread func");
 }
 
 public static this(){
 	auto t = new Thread( &threadFunc );
 	t.start();
 
 	writeln("Static init");
 }
 
 void main(){
       writeln("End of main");
 }
 
 
 run
 ======================
 rdmd test.d
 
 
 result
 ======================
 Static init
 Thread func
 Static init
 Thread func
 Static init
 Thread func
 Static init
 Thread func
 Static init
 Thread func
 Static init
 Thread func
 Static init
 Thread func
 Static init
 Thread func
 Sta...
 
 Is this normal, what's happening?
try shared static this(){ ... instead of public static this(){
Jan 13 2015