vicente.botet wrote:
I have some innocent questions: * Is logging thread-safe? * If yes, are the lines interleaved as it is the case for output streams? * If not could you point out how and where in the implementation this is handled?
Hi again,
well i have found some anwers to my questions on the document. I'll come back later on.
I'm glad you did. :)
How a log record is recognized, i.e. I don't see std::endl neither std::flush are used in the examples. How many lines result in the following example if condifiton is true (2 or 3)
src::logger_mt& lg = my_logger::get(); if (lg.open_record()) { lg.strm() << "Hello "; lg.strm() << "world!"; }
That one is not valid in the current implementation. It should be replaced with: if (lg.open_record()) lg.strm() << "Hello "; if (lg.open_record()) lg.strm() << "world!"; This is because strm() returns a temporary object that confirms the opened log record on its destruction. Once confirmed, the record is dispatched and cannot be modified, so a new record must be opened.
// do something if (condition) { if (lg.open_record()) lg.strm() << "Bye!"; }
Every complete streaming statement is a log record. So, you emit three records in your code sample, assuming that all conditions are true and the needed corrections are made.
Can other logs be interleaved between "Hello " , "world!" and Bye in a multi threaded program?
Yes.