This changes the log level for several statuses (started server,
connected to server, server status:) from CLOG_NOTE or CLOG_INFO to
CLOG_PRINT so they will be printed to stdout regardless of the log
level. This allows the GUI to accurately report the status of the
`barriers` or `barrierc` processes in src/gui/src/MainWindow.cpp#L379-L399.
Errors where the socket address is in use will keep the server from connecting
with clients. This should be reported as an ERROR instead of a warning. Also,
if the retry time is shorter issues will be more obvious, since the error will
cause the log to scroll visibly.
Sometimes -lpthread is not enough. This has caused build failures on
Gentoo Linux in the past.
The logic also seems needlessly complex. We check for HAVE_PTHREAD on
UNIX platforms even though CMake errors out if pthreads are not
found. Similarly, we have a fallback for HAVE_PTHREAD_SIGNAL being
false even though we always set it to true.
The commit a841b28 changed the condition for removing job from processing.
New flag MultiplexerJobStatus::continue_servicing become used
instead of checking pointer for NULL.
However for cases when TCPSocket::newJob() returns nullptr
the behaviour changed: earlier the job was removed, but after change
it is called again, since MultiplexerJobStatus equal to {true, nullptr}
means "run this job again".
This leads to problem with eating CPU and RAM on linux
https://github.com/debauchee/barrier/issues/470
There is similar windows problem, but not sure it is related.
https://github.com/debauchee/barrier/issues/552
Since it looks that the goal of a841b28 was only clarifying
object ownership and not changing job deletion behaviour,
this commit tries to get original behaviour and fix the bugs above
by returning {false, nullptr} instead of {true, nullptr}
when TCPSocket::newJob() returns nullptr.
Member initializers are always run in the order defined in the header.
This commit reorders them in the implementation so that their order
reflects their execution order.
Its possible poll() will return that a socket is both readable and
writable. When this happens TCPSocket::serviceConnected() is
overwriting the result from doWrite() with the result from doRead()
This can cause a situation where doWrite() tried to notify that we
should stop polling if the socket is writable, but the doRead() result
causes that to be ignored. This results in a tight loop and 100% cpu
usage in SocketMultiplexer::serviceThread() as the poll() call
instantly returns that the socket is writable, but no one cares that
it is. The issue eventually corrects itself with enough mouse
movement/clicks.
