5 Commits

Author	SHA1	Message	Date
Rich Felker	4750cf4202	ditch the priority inheritance locks; use malloc's version of lock ... i did some testing trying to switch malloc to use the new internal lock with priority inheritance, and my malloc contention test got 20-100 times slower. if priority inheritance futexes are this slow, it's simply too high a price to pay for avoiding priority inversion. maybe we can consider them somewhere down the road once the kernel folks get their act together on this (and perferably don't link it to glibc's inefficient lock API)... as such, i've switch __lock to use malloc's implementation of lightweight locks, and updated all the users of the code to use an array with a waiter count for their locks. this should give optimal performance in the vast majority of cases, and it's simple. malloc is still using its own internal copy of the lock code because it seems to yield measurably better performance with -O3 when it's inlined (20% or more difference in the contention stress test).	2012-04-24 16:32:23 -04:00
Rich Felker	14f2e115c2	add dummy __cxa_finalize ... musl's dynamic linker does not support unloading dsos, so there's nothing for this function to do. adding the symbol in case anything depends on its presence..	2011-10-14 23:31:04 -04:00
Rich Felker	b7c683be35	support __cxa_atexit, and registering atexit functions from atexit handlers ... mildly tested; may have bugs. the locking should be updated not to use spinlocks but that's outside the scope of this one module.	2011-10-14 23:21:54 -04:00
Rich Felker	f753049a50	simplify atexit and fflush-on-exit handling	2011-10-14 23:00:24 -04:00
Rich Felker	0b44a0315b	initial check-in, version 0.5.0	2011-02-12 00:22:29 -05:00