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* clean up pthread_sigmask/sigprocmask dependency orderRich Felker2011-07-301-8/+4
| | | | | | it's nicer for the function that doesn't use errno to be independent, and have the other one call it. saves some time and avoids clobbering errno.
* overhaul implementation-internal signal protectionsRich Felker2011-05-071-18/+2
| | | | | | | | | | | | | | | | | | | the new approach relies on the fact that the only ways to create sigset_t objects without invoking UB are to use the sig*set() functions, or from the masks returned by sigprocmask, sigaction, etc. or in the ucontext_t argument to a signal handler. thus, as long as sigfillset and sigaddset avoid adding the "protected" signals, there is no way the application will ever obtain a sigset_t including these bits, and thus no need to add the overhead of checking/clearing them when sigprocmask or sigaction is called. note that the old code actually *failed* to remove the bits from sa_mask when sigaction was called. the new implementations are also significantly smaller, simpler, and faster due to ignoring the useless "GNU HURD signals" 65-1024, which are not used and, if there's any sanity in the world, never will be used.
* use a separate signal from SIGCANCEL for SIGEV_THREAD timersRich Felker2011-04-141-0/+1
| | | | | | otherwise we cannot support an application's desire to use asynchronous cancellation within the callback function. this change also slightly debloats pthread_create.c.
* global cleanup to use the new syscall interfaceRich Felker2011-03-201-1/+1
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* fix error handling for pthread_sigmaskRich Felker2011-03-091-1/+5
| | | | it must return errno, not -1, and should reject invalud values for how.
* fix null pointer dereference introduced in last sigprocmask commitRich Felker2011-02-201-1/+1
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* prevent sigprocmask/pthread_sigmask from blocking implementation signalsRich Felker2011-02-191-3/+5
| | | | | | this code was wrongly disabled because the old version was trying to be too clever and didn't work. replaced it with a simple version for now.
* initial check-in, version 0.5.0 v0.5.0Rich Felker2011-02-121-0/+23