#34650 [Opn->Fbk]: pcntl with classes doesn't work as it should

[sniper]

 ID:               34650
 Updated by:       [EMAIL PROTECTED]
 Reported By:      dcpiper at indiana dot edu
-Status:           Open
+Status:           Feedback
 Bug Type:         PCNTL related
 Operating System: Linux 2.6.13.1 (Debian Sarge)
 PHP Version:      4.4.0
 New Comment:

Please try using this CVS snapshot:

  http://snaps.php.net/php5-latest.tar.gz
 
For Windows:
 
  http://snaps.php.net/win32/php5-win32-latest.zip




Previous Comments:
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[2005-09-26 21:23:09] dcpiper at indiana dot edu

Description:
------------
I have noticed that even though a class function can be registered as a
callback, it is not possible to set/update a class variable from within
the signal handler and get it to be set within the actual 'live'
instance of that object.

Is this a bug? It seems cumbersome to have to resort to global
variables in order to actually DO something with the signal other than
print out strings saying 'I got one!'

Reproduce code:
---------------
class SigTest {
  var $myvalue;
  
  function SignalHandler($signo) {
    echo "Got signal $signo \n";
    $this->myvalue = $signo;
    echo "in SignalHandler:\n";
    var_dump($this);
  }
  
  function SigTest() {
    declare (ticks = 1);
    $this->myvalue = 'some initial state';
    echo "Setting signal handlers ... ";
    pcntl_signal(SIGTERM, array(&$this, 'SignalHandler'));
    pcntl_signal(SIGINT, array(&$this, 'SignalHandler'));
    pcntl_signal(SIGHUP, array(&$this, 'SignalHandler'));
    $this->something = 'This data was set after the handler was
instantiated';
    echo "Done\n";
  }
}
$jm = new SigTest;
sleep(2);
echo "Generating signal to self...\n";
posix_kill(posix_getpid(), SIGTERM);
echo "Main execution, looking at \$jm object:\n";
var_dump($jm);

Expected result:
----------------
Expected that 'myvalue' class variable change from within signal
handler was visible outside of that function, i.e. a change made, not
reverted to the state it was in previously before the signal was
handled.


Actual result:
--------------
Setting signal handlers ... Done
Generating signal to self...
Got signal 15
in SignalHandler:
object(sigtest)(2) {
  ["myvalue"]=>
  int(15)
  ["something"]=>
  string(52) "This data was set after the handler was instantiated"
}
Main execution, looking at $jm object:
object(sigtest)(2) {
  ["myvalue"]=>
  string(18) "some initial state"
  ["something"]=>
  string(52) "This data was set after the handler was instantiated"
}

Last 'var_dump' SHOULD be the same as the first one, in my opinion.


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Edit this bug report at http://bugs.php.net/?id=34650&edit=1