Is there a portable way to statically initialise a recursive mutex?

Question

According to POSIX, I can statically initialise a mutex this way:

pthread_mutex_t m = PTHREAD_MUTEX_INITIALIZER;

However, what if I want the mutex to be recursive? Mutexes are non-recursive be default and there's no way to supply mutex attributes to the static initialisation.

Is that C or C++? Suggestions might differ depending on which language you're using. — NPE, Dec 07 '12 at 08:03

score 0 · Answer 1 · edited May 13 '16 at 08:07

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Try :

pthread_mutex_t mutex = PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP;

edited May 13 '16 at 08:07

jotik

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answered Dec 07 '12 at 09:04

O.C.

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_NP suffix means non portable. It works for linux. Try with PTHREAD_RECURSIVE_MUTEX_INITIALIZER as described here http://www.sourceware.org/pthreads-win32/manual/pthread_mutex_init.html if you care for portability – O.C. Dec 07 '12 at 09:35
PTHREAD_RECURSIVE_MUTEX_INITIALIZER is not defined by POSIX. What operating systems it is supported in? – Martin Sustrik Dec 07 '12 at 11:38

score 0 · Accepted Answer · answered Dec 09 '12 at 20:51

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It seems there is no portable way to do this. A workaround may be initialise the mutex dynamically when it is first used. To prevent race conditions while doing the initialisation another non-recursive statically initialised mutex can be used.

answered Dec 09 '12 at 20:51

Martin Sustrik

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Is there a portable way to statically initialise a recursive mutex?

2 Answers2