c++ - SOLVED: Destroying thread and exiting loop -

-

i'm creating thread this:

main.cpp

    qthread acceptorthread;     acceptorobject acceptorobject;     acceptorobject.setupconnections(acceptorthread, simulation);     acceptorobject.movetothread(&acceptorthread);

acceptorobject.cpp

void acceptorobject::setupconnections(qthread& thread, simulation * simulation) {     qobject::connect(&thread, signal(started()), this, slot(acceptnewclients())); }

acceptnewclients() method works in infinite loop. @ point if close program error: 

qthread destroyed while thread still running

i looked through similar problems @ stack , 1 guy said need break loop before finishing thread in order rid of bug. suggested use flag in infinite loop , emit signal in destructor change flag , break loop. kinda worked when did this:

qobject::connect(&thread, signal(started()), this, slot(acceptnewclients())); qobject::connect(this, signal(finishthread(bool)), this, slot(acceptnewclients(bool)));

and emited finishthread(true) signal destructor directly changed flag. of course changed slot signature won't run in new thread anymore.

destructor code:

emit finishthread(true);  this->thread()->quit(); if(!this->thread()->wait(3000)) {     this->thread()->terminate();     this->thread()->wait(); }

how can make work?

what i've tried far:

  • adding new slot change flag. result: when close program window dissapears proccess still running. think destructor destroys object before emited signal proccessed .
  • making bool argument in acceptnewclients() slot default one. result: overloads funtion 1 run in different thread , second 1 tries change flag doesn't work because different functions.

solution:

connect(this, signal(finishthread()), &thread, slot(quit())); connect(this, signal(finishthread()), this, slot(deletelater()));

it pointless change slot function signature in case. in deconstructor emit finishthread() signal, nothing more.


Comments

Post a Comment

Popular posts from this blog

Capture and play voice with Asterisk ARI -

-
there channel ari demo in wich can control channel state: ring, answer, play silence, play tone or audio-file ( https://github.com/asterisk/ari-examples/tree/master/channel-state , https://wiki.asterisk.org/wiki/display/ast/ari+and+channels%3a+manipulating+channel+state ) possible receive chunks (parts, buffers, etc.) of call voice (which created remote subscriber) or write chunks of voice, example array of bytes (not file) in audio format (alaw, ulow etc). you can use asterisk eagi interface voice data. other option use record or mixmonitor app record channel(channel have put stasis allow dialplan control ari) "write chunks of voice" can done application playback also can create own application using c/c++, compile asterisk , result want. no, can't redirect voice directly using ari.
Read more

java - Why database contraints in HSQLDB are only checked during a commit when using transactions in Hibernate? -

-
i spotted odd behavior in hsql, seems when using database transactions database contraints not checked during sql inserts during sql commits , when transaction rollbacked not checked @ all. i have spring integration test: @runwith(springjunit4classrunner.class) @transactionconfiguration(defaultrollback=true, transactionmanager="transactionmanager") @transactional public class integrationtest { with test creates new entity instance , calls hibernate's persist on it. it works fine, when change defaultrollback false fails: caught exception while allowing testexecutionlistener [org.springframework.test.context.transaction.transactionaltestexecutionlistener@517a2b0] process 'after' execution test: method [public void myintegrationtest.test()], instance [myintegrationtest@546e61d5], exception [null] org.springframework.dao.dataintegrityviolationexception: not execute statement; sql [n/a]; constraint [null]; nested exception org.hibernate.exception.const...
Read more

visual studio - Installing Packages through Nuget - "Central Directory corrupt" -

-
i'm trying add package project using nuget (in vs2015). when click "install" button see downloading missing packages... at top of screen progress bar. after moment message replaced - an error occurred while trying restore packages: central directory corrupt. with "restore" button @ end same process. anyone have idea how fix this? edit 07/2017 a far easier method of solving issue visual studio re-download package - in visual studio open tools -> options . select nuget package manager . ensure both allow nuget download missing packages , automatically check missing packages during build in visual studio both ticked. click ok . in file explorer window navigate projects' "packages" folder. two options - figure out package @ fault described in original answer , delete its' folder or (if sure packages still available in nuget) delete package folders. back in visual studio build solution. visual s...
Read more