Le vendredi 26 février 2010, Phil Thompson a écrit :
> On Fri, 26 Feb 2010 12:08:58 +0000, Phil Thompson
>
> <p...@riverbankcomputing.com> wrote:
> >
> > Unless you can provide me with a test case you'll have to experiment...
> >
> > Try adding...
> >
> > pthread_atfork(NULL, NULL, PyOS_AfterFork);
> >
> > ...after the call to PyEval_InitThreads() in siplib.c.
>
> An alternative (which I may be more comfortable with) is to add the
> /HoldGIL/ annotation to all QProcess.start() overloads. However the
> asynchronous nature of process starts may mean it has no effect.
>
> Phil
I will try the pthread_atfork() thing, which seems to me to be safer. While I
recompile sip and PyQt (I was using the linux distribution compiled version),
here is a test case, which holds after a while:
#!/usr/bin/env python
import threading
from PyQt4 import QtCore
def theotherthread():
print 'theotherthread'
while True:
a = 'turlute'
def processExited():
print 'processExited'
def readStdout():
global qprocess
print qprocess.readAllStandardOutput()
def readStderr():
global qprocess
print qprocess.readAllStandardError()
thread1 = threading.Thread( target=theotherthread )
thread1.start()
while True:
qprocess = QtCore.QProcess()
qprocess.connect( qprocess,
QtCore.SIGNAL( 'finished( int,
QProcess::ExitStatus )' ),
processExited )
qprocess.connect( qprocess, QtCore.SIGNAL( 'readyReadStandardOutput()' ),
readStdout )
qprocess.connect( qprocess, QtCore.SIGNAL( 'readyReadStandardError()' ),
readStderr )
qprocess.start( 'echo', [ 'totototototototo' ] )
qprocess.waitForFinished(-1)
--
Denis
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