6a1899ed5c
pthread_cond_t) internaly in addition to the low-level spinlock_t. The garbage collector mutex and condition variable are two such examples. This might lead to critical sections nested within critical sections. Implement a reference counting mechanism so that signals are masked only on the first entry and unmasked on the last exit. I'm not sure I like the idea of nested critical sections, but if the library is going to use the pthread primitives it might be necessary. Approved by: re/blanket libthr
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