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* mq_timedsend, mq_timedreceive: add time64, decouple 32-bit time_tRich Felker2019-07-281-0/+17
| | | | | | | | | | | time64 syscall is used only if it's the only one defined for the arch, or if the requested absolute timeout does not fit in 32 bits. on current 32-bit archs where time_t is a 32-bit type, this makes it statically unreachable. on 64-bit archs, there is no change to the code after preprocessing. on current 32-bit archs, the timeout is passed via an intermediate copy to remove the assumption that time_t is a 32-bit type.
* mq send/recv functions are cancellation pointsRich Felker2011-06-071-1/+1
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* add support for POSIX message queues, except mq_notifyRich Felker2011-06-071-0/+7