musl/src/thread, branch v0.7.1

implement robust mutexes

2011-03-18T00:41:37+00:00

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.

avoid function call to pthread_self in mutex unlock

2011-03-17T17:35:08+00:00

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.

unify lock and owner fields of mutex structure

2011-03-17T16:21:32+00:00

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.

optimize contended normal mutex case; add int compare-and-swap atomic

2011-03-17T16:14:40+00:00

simplify logic, slightly optimize contended case for non-default mutex types

2011-03-16T20:49:42+00:00

correct error returns for error-checking mutexes

2011-03-16T20:25:00+00:00

cut out a syscall on thread creation in the case where guard size is 0

2011-03-16T15:36:21+00:00

don't expose EAGAIN, etc. from timed futex wait to caller

2011-03-16T15:35:46+00:00

implement flockfile api, rework stdio locking

2011-03-13T02:55:45+00:00

implement dummy pthread_attr_[gs]etschedparam functions

2011-03-11T14:51:54+00:00

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.