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

Age	Commit message (Collapse)	Author	Lines
2012-09-30	protect sem_open against cancellation	Rich Felker	-13/+19
	also fix one minor bug: failure to free the early-reserved slot when the semaphore later found to already be mapped.
2012-09-30	overhaul sem_open	Rich Felker	-105/+96
	this function was overly complicated and not even obviously correct. avoid using openat/linkat just like in shm_open, and instead expand pathname using code shared with shm_open. remove bogus (and dangerous, with priorities) use of spinlocks. this commit also heavily streamlines the code and ensures there are no failure cases that can happen after a new semaphore has been created in the filesystem, since that case is unreportable.
2012-09-29	sem_open should make process-shared semaphores	Rich Felker	-1/+1
	this did not matter because we don't yet treat process-shared special. when private futex support is added, however, it will matter.
2012-09-29	use O_CLOEXEC to open semaphore files in sem_open	Rich Felker	-2/+2

2011-06-26	fix useless use of potentially-uninitialized mode variable in sem_open	Rich Felker	-1/+1

2011-03-10	fix failure behavior of sem_open when sem does not exist	Rich Felker	-1/+5

2011-03-10	fix sem_open and sem_close to obey posix semantics	Rich Felker	-26/+80
	multiple opens of the same named semaphore must return the same pointer, and only the last close can unmap it. thus the ugly global state keeping track of mappings. the maximum number of distinct named semaphores that can be opened is limited sufficiently small that the linear searches take trivial time, especially compared to the syscall overhead of these functions.
2011-03-04	implement POSIX semaphores	Rich Felker	-0/+116