Hi All,

How to configure ACE/TAO traces to have them working in multithreaded application?
It works fine in single threaded application, but If I want other threads to produce debug information it does not work.

To show what I mean I modified slightly the ACE_wrappers/examples/APG/Logging/Use_Callback.cpp code
and added pthread_create to them:


#include <stdio.h>
#include <iostream>
#include <pthread.h>
#include "ace/Log_Msg.h"
#include "ace/Log_Msg_Callback.h"
#include "ace/Log_Record.h"
using namespace std;
class Callback : public ACE_Log_Msg_Callback
{
public:
void log (ACE_Log_Record &log_record)
{
cout << "CALLBACK " << log_record.msg_data() << flush;
}
};

static void * my_thread(void *arg)
{
cout << "my_thread started" << endl << flush;
while (1)
{
ACE_DEBUG ((LM_DEBUG, "(%P|%t) <%N %l> my_thread loop debug\n")); // <- I never see this entry
cout << "my_thread loop cout" << endl << flush;
sleep(10);
}
}

int main (int argc, char *argv[] )
{
Callback *callback = new Callback;
ACE_LOG_MSG->set_flags (ACE_Log_Msg::MSG_CALLBACK);
ACE_LOG_MSG->clr_flags (ACE_Log_Msg::STDERR);
ACE_LOG_MSG->msg_callback (callback);

cout << "main" << endl << flush;
ACE_TRACE ("main");

pthread_t thId;
pthread_create( &thId , NULL, my_thread , NULL);

while (1)
{
ACE_DEBUG ((LM_DEBUG, "(%P|%t) <%N %l> main loop debug\n"));
cout << "main loop cout" << endl << flush;
sleep(10);
}
return 0;
}


When I run the application the output is as follows:
main
my_thread started
CALLBACK (25501|1) <My_Use_Callback.cpp 43> main loop debug
main loop coutmy_thread loop cout

CALLBACK (25501|1) <My_Use_Callback.cpp 43> main loop debug
main loop cout
my_thread loop cout
CALLBACK (25501|1) <My_Use_Callback.cpp 43> main loop debug
main loop cout
my_thread loop cout

The entry "my_thread loop debug" never appears.

The same situation is when I use the Logging_strategy configuration.


Could anyone help?
Should I initialize my thread in some special way?

Thanks in advance!
Tomek

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