Convert pthread_t to NSThread

Question

I need check whether pthread_t is main thread. I want do it from current thread (not from pthread_t which I need check and not from main thread).

My code (pt is pthread_t)

NSThread *thread = CFBridgingRelease(pt);  // it works wrong
bool isMain = thread.isMainThread;

But I can't right convert pthread_t to NSThread.

How I can convert pthread_t to NSThread?

Or how I can check whether pthread_t is main thread?

@CodeBender I don't need thread id. I need check whether pthread_t is main thread — Katya, Nov 01 '16 at 17:22

score 0 · Answer 1 · answered May 21 '21 at 13:22

There is no documented way to obtain an NSThread object for a thread identified by a pthread_t, so if ...

I need check whether pthread_t is main thread.

... is really what you need to do then you are probably up a creek.

Some of the possible alternatives are

using NSThread instead of pthreads altogether;
ensuring that the main thread's pthread_t identifier is recorded somewhere where you can access it for comparison; and
not relying on discriminating between the main thread and others in the first place.

Note also that NSThread -- at least the one I think you mean -- is an Apple thing. If you want something more broadly portable then NSThread is a non-starter.

Convert pthread_t to NSThread

1 Answers1