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digitalmars.D.learn - close program by code

reply "pgtkda" <dlang byom.de> writes:
How can i close my application by code?
Jun 26 2014
parent reply "FreeSlave" <freeslave93 gmail.com> writes:
On Thursday, 26 June 2014 at 09:05:23 UTC, pgtkda wrote:

 How can i close my application by code?


Do you mean exit status? Just call exit function from C library.

import std.c.stdlib;

void main()
{
     exit(0);
}
Jun 26 2014
next sibling parent "pgtkda" <dlang byom.de> writes:
On Thursday, 26 June 2014 at 09:58:50 UTC, FreeSlave wrote:

 On Thursday, 26 June 2014 at 09:05:23 UTC, pgtkda wrote:

 How can i close my application by code?


 Do you mean exit status? Just call exit function from C library.

 import std.c.stdlib;

 void main()
 {
     exit(0);
 }


wow, thank you very much :)
Jun 26 2014
prev sibling parent reply "John Colvin" <john.loughran.colvin gmail.com> writes:
On Thursday, 26 June 2014 at 09:58:50 UTC, FreeSlave wrote:

 On Thursday, 26 June 2014 at 09:05:23 UTC, pgtkda wrote:

 How can i close my application by code?


 Do you mean exit status? Just call exit function from C library.

 import std.c.stdlib;

 void main()
 {
     exit(0);
 }


Will destructors and/or scope statements be executed if you exit 
this way?
Jun 26 2014
parent reply "Rene Zwanenburg" <renezwanenburg gmail.com> writes:
On Thursday, 26 June 2014 at 10:40:00 UTC, John Colvin wrote:

 On Thursday, 26 June 2014 at 09:58:50 UTC, FreeSlave wrote:

 On Thursday, 26 June 2014 at 09:05:23 UTC, pgtkda wrote:

 How can i close my application by code?


 Do you mean exit status? Just call exit function from C 
 library.

 import std.c.stdlib;

 void main()
 {
    exit(0);
 }


 Will destructors and/or scope statements be executed if you 
 exit this way?


They won't. Same for module destructors.

If you need those to work, another option is to throw some custom 
Exception type which is only caught in main.
Jun 26 2014
next sibling parent reply "Chris Nicholson-Sauls" <ibisbasenji gmail.com> writes:
On Thursday, 26 June 2014 at 11:07:37 UTC, Rene Zwanenburg wrote:

 They won't. Same for module destructors.

 If you need those to work, another option is to throw some 
 custom Exception type which is only caught in main.


I really wish this wasn't the answer, but for some programs I've 
had to resort to it myself.  For at least one I've defined an 
Exception type that carries a status code payload to be returned 
by main.  D needs its own exit().

There's been this request in the bugzilla since 2009:
https://issues.dlang.org/show_bug.cgi?id=3462
Jun 26 2014
parent "H. S. Teoh via Digitalmars-d-learn" <digitalmars-d-learn puremagic.com> writes:
On Thu, Jun 26, 2014 at 01:23:17PM +0000, Chris Nicholson-Sauls via
Digitalmars-d-learn wrote:

 On Thursday, 26 June 2014 at 11:07:37 UTC, Rene Zwanenburg wrote:

They won't. Same for module destructors.

If you need those to work, another option is to throw some custom
Exception type which is only caught in main.


 
 I really wish this wasn't the answer, but for some programs I've had
 to resort to it myself.  For at least one I've defined an Exception
 type that carries a status code payload to be returned by main.  D
 needs its own exit().


I've done the same for my own programs:

	class ExitException : Exception
	{
		int status;
		this(int _status, string file=__FILE__,
			size_t line=__LINE__)
		{
			super(file,line);
			status = _status;
		}
	}
	void exit(int status=0) {
		throw new ExitException(status);
	}
	int main(string[] args) {
		try {
			...
			return 0;
		} catch(ExitException e) {
			return e.status;
		} catch(Exception e) {
			... // real exception here
			return 1;
		}
	}

It works reasonably well for single-threaded program, but as the
following bug states, there's no nice way to terminate a multithreaded
program:



 There's been this request in the bugzilla since 2009:
 https://issues.dlang.org/show_bug.cgi?id=3462


If you have any good ideas, please chime in on the bug report!


T

-- 
"I'm not childish; I'm just in touch with the child within!" - RL
Jun 26 2014
prev sibling parent "FreeSlave" <freeslave93 gmail.com> writes:
On Thursday, 26 June 2014 at 11:07:37 UTC, Rene Zwanenburg wrote:

 On Thursday, 26 June 2014 at 10:40:00 UTC, John Colvin wrote:

 On Thursday, 26 June 2014 at 09:58:50 UTC, FreeSlave wrote:

 On Thursday, 26 June 2014 at 09:05:23 UTC, pgtkda wrote:

 How can i close my application by code?


 Do you mean exit status? Just call exit function from C 
 library.

 import std.c.stdlib;

 void main()
 {
   exit(0);
 }


 Will destructors and/or scope statements be executed if you 
 exit this way?


 They won't. Same for module destructors.


Module destructors are called. At least in DMD v2.065. I believe 
d runtime automatically register this with atexit function.
Jun 26 2014