When a job was cancelled after its runThread() method finished, but before the
main thread noticed this and reacted, we would just run runMain() before and
pretend the job finished normally.
However, with CModuleJob this means that runMain() might get called for a module
which is currently being destructed. This has bad effects with virtual functions
and thus causes problems. It's better to just really cancel the job instead.
Signed-off-by: Uli Schlachter <psychon@znc.in>
This adds CThreadPool::cancelJob() and cancelJobs() which can cancel a set of
jobs synchronously. These functions only return when the job was successfully
cancelled.
It tries to cancel the jobs as quickly as possible, skipping any callbacks on
CJob that were not yet called. A job that is already running can use
CJob::wasCancelled() to check if it should quit.
Signed-off-by: Uli Schlachter <psychon@znc.in>
