digitalmars.D.learn - Endless static this call when used a thread in it
- tcak (39/39) Jan 13 2015 I have written the following code:
- tcak (5/44) Jan 13 2015 When I defined static init with shared
- ketmar via Digitalmars-d-learn (3/5) Jan 13 2015 yes.
- Daniel =?UTF-8?B?S296w6Fr?= via Digitalmars-d-learn (7/64) Jan 13 2015 V Tue, 13 Jan 2015 13:56:05 +0000
- Daniel Kozak (9/76) Jan 13 2015 And here is better explanation
- Steven Schveighoffer (8/12) Jan 15 2015 In case it's not clear -- shared static this runs ONCE at the beginning
- Daniel =?UTF-8?B?S296w6Fr?= via Digitalmars-d-learn (8/57) Jan 13 2015 V Tue, 13 Jan 2015 13:53:09 +0000
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
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
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
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 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 againI 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
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: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.On Tuesday, 13 January 2015 at 13:53:11 UTC, tcak wrote: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 againI 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
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
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