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path: root/src/thread/pthread_barrierattr_setpshared.c
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2011-09-27process-shared barrier support, based on discussion with bdonlanRich Felker-1/+1
this implementation is rather heavy-weight, but it's the first solution i've found that's actually correct. all waiters actually wait twice at the barrier so that they can synchronize exit, and they hold a "vm lock" that prevents changes to virtual memory mappings (and blocks pthread_barrier_destroy) until all waiters are finished inspecting the barrier. thus, it is safe for any thread to destroy and/or unmap the barrier's memory as soon as pthread_barrier_wait returns, without further synchronization.
2011-03-07implement barrier attribute functions (essentially no-ops)Rich Felker-0/+7