pthread_mutex_init

I'm trying to find out if there is a way to init a pthread_mutex so that he starts locked.

With pthread_mutex_init() it starts unlocked by default and I don't know how to change that.

Any suggestions?

Thanks in advance.

why not call pthread_mutex_lock() after pthread_mutex_init(), this is not atomic but as you're in the initialization phase, only one thread/process is doing it, right? this is done once

I thought of that but isn't that bad programming?

Not in of itself. In fact, that's your only option.

The next question is "why?".

gg

Quote:

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Originally Posted by kotoko

I thought of that but isn't that bad programming?

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No, it's fine. There is a macro, PTHREAD_MUTEX_INITIALIZER, which you can use to statically initialize a mutex, but it initializes it to an unlocked state. There is no initializer macro which initializes to a locked state.

I sort of wonder why the mutex should begin its life in a locked state...

The question really was why was I doing it.

It turns out I should use a posix semaphore instead.

Thanks for all the help anyway.