Re: How to kill whole application if child thread raises an exception?
On Thursday, 27 October 2016 at 13:37:29 UTC, Steven
Schveighoffer wrote:
Hm... what about:
import std.traits: Parameters;
auto mySpawn(F)(F func, Parameters!F params)
{
static auto callIt(F func, Parameters!F params)
{
try
{
return func(params);
}
catch(Throwable t)
{
// print the exception/error, e.g.:
import std.writeln;
writeln(e.toString());
// terminate program
import core.stdc.stdlib : exit;
exit(1);
}
}
return spawn(, func, params);
}
void main()
{
auto tID = mySpawn();
...
}
-Steve
I found the solution which works with dmd and ldc2:
...
import core.stdc.stdlib: _Exit;
_Exit(exitcode);
...
Re: How to kill whole application if child thread raises an exception?
I found http://arsdnet.net/this-week-in-d/2016-aug-07.html Maybe it's helps me.
Re: How to kill whole application if child thread raises an exception?
On Friday, 28 October 2016 at 03:38:05 UTC, dm wrote: On Thursday, 27 October 2016 at 13:37:29 UTC, Steven Schveighoffer wrote: Hm... what about: ... Main thread still running. Actually it's depends on compiler. With ldc2 main thread doesn't stop, but with dmd seems all ok: root@proxytest:~# ./newthread object.Exception@newthread.d(30): Everything is bad. ??:? void newthread.func() [0x451f52] ??:? void newthread.mySpawn!(void function()*).mySpawn(void function()*).callIt(void function()*) [0x452037] ??:? void std.concurrency._spawn!(void function(void function()*)*, void function()*)._spawn(bool, void function(void function()*)*, void function()*).exec() [0x4529f4] ??:? void core.thread.Thread.run() [0x46f1f1] ??:? thread_entryPoint [0x46ef1b] ??:? [0x42d00a3] uncaught exception dwarfeh(224) fatal error Aborted
Re: How to kill whole application if child thread raises an exception?
On Thursday, 27 October 2016 at 13:37:29 UTC, Steven Schveighoffer wrote: Hm... what about: ... Main thread still running.
How to kill whole application if child thread raises an exception?
Thanks all. I gues I must rewrote my app to send exeptions to other threads, use non blocking io, etc, etc.
Re: How to kill whole application if child thread raises an exception?
On Wednesday, 26 October 2016 at 10:03:30 UTC, dm wrote: Why so strange default behavior do not kill other threads in case some of threads raise exception? But thanks anyway. AFAIK, on posix you should join the child thread, and when you do, the stored exception is rethrown in the joining thread.
Re: How to kill whole application if child thread raises an exception?
On Wednesday, 26 October 2016 at 08:42:02 UTC, dm wrote: I want to kill all my threads if it is unhandled exception. How can I do that? The spawnLinked function might help: http://dpldocs.info/experimental-docs/std.concurrency.spawnLinked.html http://dlang.org/phobos/std_concurrency.html#spawnLinked " This new thread is linked to the calling thread so that if either it or the calling thread terminates a LinkTerminated message will be sent to the other, causing a LinkTerminated exception to be thrown on receive()." At least that sounds basically right.
Re: How to kill whole application if child thread raises an exception?
On Wednesday, 26 October 2016 at 08:42:02 UTC, dm wrote:
Hi. I tried code below:
import std.concurrency;
import std.stdio;
void func()
{
throw new Exception("I'm an exception");
}
void main()
{
auto tID = spawn();
foreach(line; stdin.byLine)
send(tID, "");
}
I expect my application will die immediatly, but main thread
still running and I don't see any errors.
I want to kill all my threads if it is unhandled exception.
How can I do that?
You need to link the threads, and at least one receive after the
child thread has implicitly sent the exception to the main thread:
import std.concurrency;
import std.stdio;
---
void func()
{
throw new Exception("I'm an exception");
}
void main()
{
auto tID = spawnLinked();
receive((int dummy){});
}
---
/Paolo
Re: How to kill whole application if child thread raises an exception?
On Wednesday, 26 October 2016 at 10:09:05 UTC, rikki cattermole wrote: If you throw an error it should crash the entire application. But really you need to set up sync points within your application to allow it to die gracefully. I tried throw new Error... But main thread still working. Tried with dmd v2.071.2 and ldc2 0.17.2. OS - Linux.
Re: How to kill whole application if child thread raises an exception?
On 26/10/2016 11:03 PM, dm wrote:
On Wednesday, 26 October 2016 at 09:43:10 UTC, rikki cattermole wrote:
```D
void entryPoint(alias func)() {
try {
func();
} catch (Exception e) {
import std.stdio;
writeln(e.toString());
}
}
void main() {
auto tid = spawn(!someFunc);
// ...
}
```
Well... This code shows me:
object.Exception@thread.d(6): I'm an exception
But my main thread still working :(
Why so strange default behavior do not kill other threads in case some
of threads raise exception?
But thanks anyway.
If you throw an error it should crash the entire application.
But really you need to set up sync points within your application to
allow it to die gracefully.
Re: How to kill whole application if child thread raises an exception?
On Wednesday, 26 October 2016 at 09:43:10 UTC, rikki cattermole
wrote:
```D
void entryPoint(alias func)() {
try {
func();
} catch (Exception e) {
import std.stdio;
writeln(e.toString());
}
}
void main() {
auto tid = spawn(!someFunc);
// ...
}
```
Well... This code shows me:
object.Exception@thread.d(6): I'm an exception
But my main thread still working :(
Why so strange default behavior do not kill other threads in case
some of threads raise exception?
But thanks anyway.
Re: How to kill whole application if child thread raises an exception?
On Wednesday, 26 October 2016 at 09:43:10 UTC, rikki cattermole
wrote:
Basically when you spawn a thread giving the function, you pass
it through another function which will catch any exceptions not
normally caught.
Of course this really should be the default behavior but
somebody else may be more of a help here.
And it is pseudo code, so please don't expect it to 100% work
as I have written it.
```D
void entryPoint(alias func)() {
try {
func();
} catch (Exception e) {
import std.stdio;
writeln(e.toString());
}
}
void main() {
auto tid = spawn(!someFunc);
// ...
}
```
It doesn't return. It still have to be killed by hand. (at least
on Linux)
Re: How to kill whole application if child thread raises an exception?
Basically when you spawn a thread giving the function, you pass it
through another function which will catch any exceptions not normally
caught.
Of course this really should be the default behavior but somebody else
may be more of a help here.
And it is pseudo code, so please don't expect it to 100% work as I have
written it.
```D
void entryPoint(alias func)() {
try {
func();
} catch (Exception e) {
import std.stdio;
writeln(e.toString());
}
}
void main() {
auto tid = spawn(!someFunc);
// ...
}
```
Re: How to kill whole application if child thread raises an exception?
On Wednesday, 26 October 2016 at 08:53:13 UTC, rikki cattermole wrote: Simple, handle the exceptions on each thread. I don't want handle exceptions. I want my application crash with exception description. Can you change my code above to show how it can be made?
Re: How to kill whole application if child thread raises an exception?
On 26/10/2016 9:42 PM, dm wrote:
Hi. I tried code below:
import std.concurrency;
import std.stdio;
void func()
{
throw new Exception("I'm an exception");
}
void main()
{
auto tID = spawn();
foreach(line; stdin.byLine)
send(tID, "");
}
I expect my application will die immediatly, but main thread still
running and I don't see any errors.
I want to kill all my threads if it is unhandled exception.
How can I do that?
Simple, handle the exceptions on each thread.
How to kill whole application if child thread raises an exception?
Hi. I tried code below:
import std.concurrency;
import std.stdio;
void func()
{
throw new Exception("I'm an exception");
}
void main()
{
auto tID = spawn();
foreach(line; stdin.byLine)
send(tID, "");
}
I expect my application will die immediatly, but main thread
still running and I don't see any errors.
I want to kill all my threads if it is unhandled exception.
How can I do that?
