Re: integer in ostringstream
cerr wrote:
Hi Chris,
Thanks for your reply!
getPriorityNeed() looks is just a simple method to read an integer in
a thread safe manner:
int GPSData::getPriorityNeed()
{
int value;
novax_thread_lock(&priorityNeed_mtx);
//calculate priority with data from config file and deviation
from
INIT!
value = GPSData::priorityNeed;
novax_thread_unlock(&priorityNeed_mtx);
return value;
}
GPSData::priorityNeed gets set by
void GPSData::setPriorityNeed(int value)
{
novax_thread_lock(&priorityNeed_mtx);
GPSData::priorityNeed = value;
novax_thread_unlock(&priorityNeed_mtx);
}
which gets called regularly from a thread.
The object GPSData::priorityNeed is declared as a private integer.
So why would getPriorityNeed return a correct value most of the times
but every now and then it seems to mess it up... Not very often tho
and as said, I can't really figure out any regularity... :o
There are two possible causes for that wrong value to turn up:
1. An incorrect value gets passed to setPriorityNeed. This should be
caught with an assert in setPriorityNeed, after which you can trace back
in the debugger who is responsible for that wrong value.
2. You have a rogue pointer in your program that causes the value of
GPSData::priorityNeed to be overwritten. This is a very serious problem
that can only be located with a lot of hard effort and critically
looking at ALL of the code.
Thanks for help!
Bart v Ingen Schenau
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