musl - musl - an implementation of the standard library for Linux-based systems

Age	Commit message (Collapse)	Author	Lines
2014-08-16	optimize locking against vm changes for mmap/munmap	Rich Felker	-1/+1
	the whole point of this locking is to prevent munmap, or mmap with MAP_FIXED, from deallocating virtual addresses, or changing the backing a given virtual address refers to, during certain race windows involving self-synchronized unmapping or destruction of pthread synchronization objects. there is no need for exclusion in the other direction, so it suffices to take the lock momentarily and release it before making the syscall, rather than holding it across the syscall.
2013-12-12	include cleanups: remove unused headers and add feature test macros	Szabolcs Nagy	-1/+0

2011-09-27	process-shared barrier support, based on discussion with bdonlan	Rich Felker	-1/+10
	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.
2011-03-20	global cleanup to use the new syscall interface	Rich Felker	-1/+1

2011-02-12	initial check-in, version 0.5.0v0.5.0	Rich Felker	-0/+11