riscv/musl - musl - Gitea: Git with a cup of tea

Author	SHA1	Message	Date
Rich Felker	e44849f5cf	protect sem_open against cancellation also fix one minor bug: failure to free the early-reserved slot when the semaphore later found to already be mapped.	14 years ago
Rich Felker	bf258341b7	overhaul sem_open 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.	14 years ago
Rich Felker	3d8d90c5cc	sem_open should make process-shared semaphores this did not matter because we don't yet treat process-shared special. when private futex support is added, however, it will matter.	14 years ago
Rich Felker	39f296a95b	use O_CLOEXEC to open semaphore files in sem_open	14 years ago
Rich Felker	6e53a6eca4	fix useless use of potentially-uninitialized mode variable in sem_open	15 years ago
Rich Felker	682a0f271f	fix failure behavior of sem_open when sem does not exist	15 years ago
Rich Felker	81af503610	fix sem_open and sem_close to obey posix semantics 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.	15 years ago
Rich Felker	6fc5fdbdc7	implement POSIX semaphores	15 years ago