Re: [zeromq-dev] what do I do bad with zmq_threadstart ?
Thanks both of you Pieter and Mikko,
Oh yes, this code is not the best one I tried:
threads[i] = zmq_threadstart (&client_task, (void*) args);
threads[i] = zmq_threadstart (&client_task, reinterpret_cast
(args));
Finally, in an other try, I did let client_task (void **) :-[
Le 22/10/2013 18:35, Pieter Hintjens a écrit :
You have to cast the args to (void *) when calling zmq_threadstart,
and cast the void * argument back to void ** in the child thread.
On Tue, Oct 22, 2013 at 6:29 PM, Laurent Alebarde wrote:
Hi Devs,
I am trying to use zmq_threadstart. My first test passing ctx as args works,
but I need now to pass two arguments. So I tried many ways and all the time
it ends with a compilor insult :
error: invalid conversion from 'void (*)(void**)' to 'void (*)(void*)'
[-fpermissive]
In file included from ../tests/testutil.hpp:24:0,
from ../tests/test_concurrency_parano.cpp:20:
../tests/../include/zmq_utils.h:94:18: error: initializing argument 1 of
'void* zmq_threadstart(void (*)(void*), void*)' [-fpermissive]
make: *** [tests/test_concurrency_parano.o] Error 1
Here is my code exerpt :
struct arg_t {
void* ctx;
uint8_t id[8];
};
for (int i = 0; i < QT_CLIENTS; i++)
{
arg_t* args = (arg_t*) malloc(sizeof (arg_t)); // it is up to the
thread to free it
args->ctx = ctx;
int rc = build_test_stuff(i, args->id);
assert (rc == 0);
// start client thread with id
threads[i] = zmq_threadstart (&client_task, args);
}
I read many posts on stackoverflow and elsewhere with the same problem with
pthread_create, but it has not helped me.
Any idea please ?
Laurent
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Re: [zeromq-dev] what do I do bad with zmq_threadstart ?
On Wed, Oct 23, 2013 at 12:29 AM, Laurent Alebarde wrote: > Hi Devs, > > I am trying to use zmq_threadstart. My first test passing ctx as args > works, but I need now to pass two arguments. So I tried many ways and all > the time it ends with a compilor insult : > > error: invalid conversion from 'void (*)(void**)' to 'void (*)(void*)' > [-fpermissive] > In file included from ../tests/testutil.hpp:24:0, > from ../tests/test_concurrency_parano.cpp:20: > ../tests/../include/zmq_utils.h:94:18: error: initializing argument 1 of > 'void* zmq_threadstart(void (*)(void*), void*)' [-fpermissive] > make: *** [tests/test_concurrency_parano.o] Error 1 > > Hi, looking at the compiler output: is client_task defined as client_task (void **) ? The parameter should be void *. -- Mikko ___ zeromq-dev mailing list zeromq-dev@lists.zeromq.org http://lists.zeromq.org/mailman/listinfo/zeromq-dev
Re: [zeromq-dev] what do I do bad with zmq_threadstart ?
You have to cast the args to (void *) when calling zmq_threadstart,
and cast the void * argument back to void ** in the child thread.
On Tue, Oct 22, 2013 at 6:29 PM, Laurent Alebarde wrote:
> Hi Devs,
>
> I am trying to use zmq_threadstart. My first test passing ctx as args works,
> but I need now to pass two arguments. So I tried many ways and all the time
> it ends with a compilor insult :
>
> error: invalid conversion from 'void (*)(void**)' to 'void (*)(void*)'
> [-fpermissive]
> In file included from ../tests/testutil.hpp:24:0,
> from ../tests/test_concurrency_parano.cpp:20:
> ../tests/../include/zmq_utils.h:94:18: error: initializing argument 1 of
> 'void* zmq_threadstart(void (*)(void*), void*)' [-fpermissive]
> make: *** [tests/test_concurrency_parano.o] Error 1
>
> Here is my code exerpt :
>
> struct arg_t {
> void* ctx;
> uint8_t id[8];
> };
>
> for (int i = 0; i < QT_CLIENTS; i++)
> {
> arg_t* args = (arg_t*) malloc(sizeof (arg_t)); // it is up to the
> thread to free it
> args->ctx = ctx;
>
> int rc = build_test_stuff(i, args->id);
> assert (rc == 0);
>
> // start client thread with id
> threads[i] = zmq_threadstart (&client_task, args);
> }
>
> I read many posts on stackoverflow and elsewhere with the same problem with
> pthread_create, but it has not helped me.
>
> Any idea please ?
>
> Laurent
>
>
> ___
> zeromq-dev mailing list
> zeromq-dev@lists.zeromq.org
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>
--
-
Pieter Hintjens
CEO of iMatix.com
Founder of ZeroMQ community
blog: http://hintjens.com
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[zeromq-dev] what do I do bad with zmq_threadstart ?
Hi Devs,
I am trying to use zmq_threadstart. My first test passing ctx as args
works, but I need now to pass two arguments. So I tried many ways and
all the time it ends with a compilor insult :
error: invalid conversion from 'void (*)(void**)' to 'void (*)(void*)'
[-fpermissive]
In file included from ../tests/testutil.hpp:24:0,
from ../tests/test_concurrency_parano.cpp:20:
../tests/../include/zmq_utils.h:94:18: error: initializing argument 1
of 'void* zmq_threadstart(void (*)(void*), void*)' [-fpermissive]
make: *** [tests/test_concurrency_parano.o] Error 1
Here is my code exerpt :
struct arg_t {
void* ctx;
uint8_t id[8];
};
for (int i = 0; i < QT_CLIENTS; i++)
{
arg_t* args = (arg_t*) malloc(sizeof (arg_t)); // it is up to
the thread to free it
args->ctx = ctx;
int rc = build_test_stuff(i, args->id);
assert (rc == 0);
// start client thread with id
threads[i] = zmq_threadstart (&client_task, args);
}
I read many posts on stackoverflow and elsewhere with the same problem
with pthread_create, but it has not helped me.
Any idea please ?
Laurent
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