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

Age	Commit message (Collapse)	Author	Lines
2011-03-17	implement robust mutexes	Rich Felker	-10/+83
	some of this code should be cleaned up, e.g. using macros for some of the bit flags, masks, etc. nonetheless, the code is believed to be working and correct at this point.
2011-03-17	avoid function call to pthread_self in mutex unlock	Rich Felker	-1/+1
	if the mutex was previously locked, we can assume pthread_self was already called at the time of locking, and thus that the thread pointer is initialized.
2011-03-17	reorder mutex struct fields to make room for pointers (upcoming robust mutexes)	Rich Felker	-1/+3
	the layout has been chosen so that pointer slots 3 and 4 fit between the integer slots on 32-bit archs, and come after the integer slots on 64-bit archs.
2011-03-17	unify lock and owner fields of mutex structure	Rich Felker	-8/+6
	this change is necessary to free up one slot in the mutex structure so that we can use doubly-linked lists in the implementation of robust mutexes.
2011-03-17	optimize contended normal mutex case; add int compare-and-swap atomic	Rich Felker	-1/+1

2011-03-16	simplify logic, slightly optimize contended case for non-default mutex types	Rich Felker	-4/+2

2011-03-16	correct error returns for error-checking mutexes	Rich Felker	-2/+6

2011-03-16	cut out a syscall on thread creation in the case where guard size is 0	Rich Felker	-1/+1

2011-03-16	don't expose EAGAIN, etc. from timed futex wait to caller	Rich Felker	-1/+4

2011-03-16	optimize file locking: avoid cache-polluting writes to global storage	Rich Felker	-3/+5

2011-03-14	partially-written draft of fmemopen, still in #if 0	Rich Felker	-3/+48

2011-03-12	misplaced & in times() made it fail to work, and clobber the stack	Rich Felker	-1/+1

2011-03-12	implement flockfile api, rework stdio locking	Rich Felker	-15/+66

2011-03-11	implement dummy pthread_attr_[gs]etschedparam functions	Rich Felker	-0/+14
	for some reason these functions are not shaded by the PS/TPS option in POSIX, so presumably they are mandatory, even though the functionality they offer is optional. for now, provide them in case any programs depend on their existence, but disallow any priority except the default.
2011-03-11	fix pthread_attr_* implementations to match corrected prototypes	Rich Felker	-4/+4

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

2011-03-10	fix some semaphore wait semantics (race condition deadlock and error checking)	Rich Felker	-1/+7

2011-03-10	fix sem_open and sem_close to obey posix semantics	Rich Felker	-38/+85
	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.
2011-03-10	optimize pthread termination in the non-detached case	Rich Felker	-4/+16
	we can avoid blocking signals by simply using a flag to mark that the thread has exited and prevent it from getting counted in the rsyscall signal-pingpong. this restores the original pthread create/join throughput from before the sigprocmask call was added.
2011-03-10	fix errors in sigqueue (potential information leak, wrong behavior)	Rich Felker	-5/+7
	1. any padding in the siginfo struct was not necessarily zero-filled, so it might have contained private data off the caller's stack. 2. the uid and pid must be filled in from userspace. the previous rsyscall fix broke rsyscalls because the values were always incorrect.
2011-03-10	security fix: check that cancel/rsyscall signal was sent by the process itself	Rich Felker	-0/+3

2011-03-10	more cancellation points: tcdrain, clock_nanosleep	Rich Felker	-2/+12

2011-03-10	remove useless return value checks for functions that cannot fail	Rich Felker	-3/+2

2011-03-10	make sigsuspend a cancellation point	Rich Felker	-1/+6

2011-03-10	make sigtimedwait a cancellation point	Rich Felker	-0/+3

2011-03-10	don't fail with EINTR in sigtimedwait	Rich Felker	-6/+6
	POSIX allows either behavior, but sigwait is not allowed to fail with EINTR, so the retry loop would have to be in one or the other anyway.
2011-03-10	fix sigsuspend syscall	Rich Felker	-1/+1

2011-03-10	make sigaltstack work (missing macros in signal.h, error conditions)	Rich Felker	-1/+11

2011-03-10	fix errno behavior in clock_* functions	Rich Felker	-3/+0
	these functions are specified inconsistent in whether they're specified to return an error value, or return -1 and set errno. hopefully now they all match what POSIX requires.
2011-03-09	fix error handling for pthread_sigmask	Rich Felker	-1/+15
	it must return errno, not -1, and should reject invalud values for how.
2011-03-09	make fork properly initialize the main thread in the child process	Rich Felker	-0/+7

2011-03-09	optimize pthread initialization	Rich Felker	-2/+2
	the set_tid_address returns the tid (which is also the pid when called from the initial thread) so there is no need to make a separate syscall to get pid/tid.
2011-03-09	fix race condition in raise - just mask signals	Rich Felker	-9/+9
	a signal handler could fork after the pid/tid were read, causing the wrong process to be signalled. i'm not sure if this is supposed to have UB or not, but raise is async-signal-safe, so it probably is allowed. the current solution is slightly expensive so this implementation is likely to be changed in the future.
2011-03-09	fix raise semantics with threads.	Rich Felker	-1/+12

2011-03-08	simplify and optimize pthread_mutex_trylock	Rich Felker	-17/+16

2011-03-08	rwlock trylock functions were wrongly returning EAGAIN instead of EBUSY	Rich Felker	-3/+3

2011-03-08	fix major breakage in pthread_once (it was always deadlocking)	Rich Felker	-8/+7
	the issue was a break statement that was breaking only from the switch, not the enclosing for loop, and a failure to set the final success state.
2011-03-08	fix and optimize non-default-type mutex behavior	Rich Felker	-25/+19
	problem 1: mutex type from the attribute was being ignored by pthread_mutex_init, so recursive/errorchecking mutexes were never being used at all. problem 2: ownership of recursive mutexes was not being enforced at unlock time.
2011-03-08	implement pthread_mutexattr_[gs]etpshared functions	Rich Felker	-0/+16

2011-03-08	disallow cpu time clocks as condattr clock values	Rich Felker	-1/+1

2011-03-07	fix off-by-one error in sem_(timed)wait (using old sem value instead of new)	Rich Felker	-1/+1

2011-03-07	use the selected clock from the condattr for pthread_cond_timedwait	Rich Felker	-1/+3

2011-03-07	implement pthread_rwlockattr_* (essentially no-ops)	Rich Felker	-0/+28

2011-03-07	implement pthread_condattr_* interfaces	Rich Felker	-0/+45
	note that, while the attributes are stored, they are not used in pthread_cond_init yet.
2011-03-07	reject invalid attribute settings	Rich Felker	-0/+2
	note that this is a pedantic conformance issue and waste of code. it only affects broken code or code that is probing for conformance.
2011-03-07	implement barrier attribute functions (essentially no-ops)	Rich Felker	-0/+27

2011-03-04	enforce stack size min in pthread_attr_setstacksize	Rich Felker	-1/+1

2011-03-04	implement POSIX semaphores	Rich Felker	-0/+201

2011-03-03	optimize POSIX TSD for fast pthread_getspecific	Rich Felker	-9/+14

2011-03-03	implement POSIX shared memory	Rich Felker	-0/+42