signals

问题 When I use this module in a script, the if ( $size_changed ) { remains false when I've changed the terminal size. When I copy the code from the module directly in a script (so that I don't have to load the module) it works as expected. What could it be that loading the code as a module doesn't work? use warnings; use 5.014; package My_Package; use Exporter 'import'; our @EXPORT = qw(choose); my $size_changed; $SIG{WINCH} = sub { $size_changed = 1; }; sub choose { # ... # ... while ( 1 ) { my

问题 I'm writing a c# component that will only be used internally at my company. The component encapsulates communication with a number of servers that particular desktop applications need to communicate with. The servers can send unsolicited messages to the component, which are 'caught' in a separate thread. I want the majority of this component to execute under the context of its creating thread. I do not wish the separate message thread to do any message processing. Instead, I would like to

问题 I am trying to compare the FFT of exp(-t^2) to the function's analytical fourier transform, exp(-(w^2)/4)/sqrt(2), over the frequency range -3 to 3. I have written the following matlab code and have iterated on it MANY times now with no success. fs = 100; %sampling frequency dt = 1/fs; t = 0:dt:10-dt; %time vector L = length(t); %number of sample points %N = 2^nextpow2(L); %necessary? y = exp(-(t.^2)); Y=dt*ifftshift(abs(fft(y))); freq = (-L/2:L/2-1)*fs/L; %freq vector F = (exp(-(freq.^2)/4))

问题 I'm trying to make my own application that will listen to the media-keys in gnome using dbus. I have found a script that works in python and I'm trying to make it work by converting it to C. My c-code builds and runs correctly but it doesn't respond to the dbus signal. this python code works: #!/usr/bin/env python """Printing out gnome multi media keys via dbus-python. """ import gobject import dbus import dbus.service import dbus.mainloop.glib def on_mediakey(comes_from, what): """ gets

问题 QT 5.1.0rc2 , msvc 2010 , Microsoft Visual Studio 2010 It is working code on Qt 4.8.4 , msvc 2008 I have compile error at #if defined( HANDLE_PROCESSING_IN_MAIN_THREAD ) if(QThread::currentThread() != this) emit started(); #endif inherited::run(); and #if defined( HANDLE_PROCESSING_IN_MAIN_THREAD ) if(QThread::currentThread() != this) emit finished(); #endif error C2660: 'QThread::started' : function does not take 0 arguments error C2660: 'QThread::finished' : function does not take 0

问题 I would like to catch a signal ( let's focus on INT ) and not finish the currently running command so that it finishes after running signal handler. Let's say I have the following script: #!/bin/bash READY=0 ctrl_c(){ READY=1 } trap ctrl_c INT while true; do echo first sleep sleep 1 echo second sleep sleep 1 if [ $READY -ne 0 ] ; then echo -e "\n$READY" echo Exit exit fi done When I hit Ctrl C after first sleep then I get immediately dropped down to second sleep , second sleep 1 and script

问题 Introduction I'm trying to update QT GUI element basing on the state of calculations in embedded python script. I'm able to extract required values from python, but can't set a reference to c++ object to make it work. The details Let's assume python code is called (in calc.cpp) this way: void class_name::transfer(varA, varB, varC) { Py_Initialize(); emit inprogress(70); //HERE IT WORKS object module = import("__main__"); object name_space = module.attr("__dict__"); exec_file("MyModule.py",

问题 I need handle the SIGSEGV in my Linux app. The reason is some clean up(3-partry lib) must be done before generate core-dump. What is more, the clean up must be performed in the context of calling thread, cannot do in signal handler. So I plan in signal handler to pass the control to the calling thread, after the clean up finished, then use raise(SIGSEGV) to generate the core-dump. The real problem seems the signal_handler cannot pass the control to calling thread, no matter I use post_sem or

问题 I have a Tastypie ModelResource defining various endpoints which work as expected. I've now configured this ModelResource to have BasicAuthentication : class Meta: authentication = BasicAuthentication() I've defined a couple of test users through the Django Admin Interface. As per the Django 1.7 Documentation, I've created a signals.py in which I register a couple of test signals: from django.core.signals import request_finished from django.contrib.auth.signals import user_logged_in from

问题 For a custom server I intent to use the int zmq::poll( zmq_pollitemt_t * items , int nitems, long timeout = -1) . function which is I think is a wrapper around the unix poll function but includes zmq::socket_t next to file descriptors. The function works as I expected until I press ctrl+x or run $kill my_server_pid in the terminal. I would expect that the poll to terminate with -1 or throws a zmq::error_t (which derives from std::exception ) which includes a errno and the strerr message. This