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Re: snap-2004-11-03 breakage
Alexander Terekhov wrote:
Code like (from Ettercap)
pthread_t pid = ec_thread_getpid("golem");
if (pid != 0)
Code it like
But how does ec_thread_getpid() portably determine if the thread
exists or not?
Don't rely on idiotic pthread_kill() "testing". The standard
doesn't preclude the use of pointers for thread IDs (e.g.
inside pthread_t structure).Oops. I should have recognised that because ...
Pointers become indeterminate and... that's exactly why pthread_t was changed in pthreads-win32.
trigger undefined behavior for any nonassignment access once
the reference storage gets freed. Conforming implementations
are allowed to reclaim/free that referenced storage when
detached thread is terminated or joinable thread is terminated
and joined. Use of "retired" pthread_t values (e.g. as
pthread_kill() argument) after that moment will trigger
Every function that takes a thread ID argument has the same problem
as pthread_kill() if pointers are used.