mildly tested; may have bugs. the locking should be updated not to use
spinlocks but that's outs...

the fcntl syscall can return a negative value when the command is
F_GETOWN, and this is not an e...

no idea why these 4 are permuted and the rest are standard/generic

...and still be valid in #if directives.

right now it's questionable whether this change is an improvement or
not, but if we later want t...

this is valid for error-checking mutexes; otherwise it invokes UB and
would be justified in cras...

this simplifies the code paths slightly, but perhaps what's nicer is
that it makes recursive mut...

a reader unlocking the lock need only wake one waiter (necessarily a
writer, but a writer unlock...

mildly tested, seems to work

passing null pointer for %s is UB but lots of broken programs do it anyway

there is no need to send a wake when the lock count does not hit zero,
but when it does, all wai...

seeking back can be performed by the caller, but if the caller doesn't
expect it, it will result...

eliminate the sequence number field and instead use the counter as the
futex because of the way ...

i think this works, but it can be simplified. (next step)

the vm lock only waits for threads in the same process exiting.
actually this fix is not enough,...

it was assuming the result of the condition it was supposed to be
checking for, i.e. that the th...

we're not required to check this except for error-checking mutexes,
but it doesn't hurt. the new...

when used with error-checking mutexes, pthread_cond_wait is required
to fail with EPERM if the m...

i set the return value but then never used it... oops!

not sure if this is correct/ideal. it needs further attention.

this implementation is rather heavy-weight, but it's the first
solution i've found that's actual...

mmap returns MAP_FAILED not 0 because some idiot thought the ability
to mmap the null pointer pa...

issue reported by nsz, but it's actually not just pedantic. the
functions can take input of any ...

lock out new waiters during the broadcast. otherwise the wait count
added to the mutex might be ...

due to moving waiters from the cond var to the mutex in bcast, these
waiters upon wakeup would s...

the changes to syscall_ret are mostly no-ops in the generated code,
just cleanup of type issues ...

testing revealed that the old implementation, while correct, was
giving way too many spurious wa...

using swap has a race condition: the waiters must be added to the
mutex waiter count *before* th...

somehow i forgot that normal-type mutexes don't store the owner tid.

this avoids the "stampede effect" where pthread_cond_broadcast would
result in all waiters wakin...

previously, a waiter could miss the 1->0 transition of block if
another thread set block to 1 ag...

casting to int would not be correct because high bits could be lost.
mapping the high bits down ...

actually this is just to avoid gcc being stupid and refusing to inline
the function version, eve...

it's amazing none of the conformance tests i've run even bothered to
check whether something so ...

if the file descriptor resource limit has been increased past
FD_SETSIZE, this is actually a sec...

for now this is just a tiny optimization, but later if we support
cancellation from __stdio_read...

the arm syscall abi requires 64-bit arguments to be aligned on an even
register boundary. these ...

this is a case of poorly written man pages not matching the actual
implementation, and why i hat...

this bug was introduced in a recent patch. the problem we're working
around is that broken GNU s...

at the same time, make struct statfs match the traditional definition
and make it more useful, e...

really wchar_t should never vary, but the ARM EABI defines it as an
unsigned 32-bit int instead ...

this was the cause of crashes in printf when attempting to print
floating point values.

this port assumes eabi calling conventions, eabi linux syscall
convention, and presence of the k...

it does not work, but some configure scripts will falsely detect
support then generate programs ...

several things are changed. first, i have removed the old __uniclone
function signature and repl...

eventually we may have a working "generic" implementation for archs
that don't need anything spe...

i blame this one on posix for using hideous const-qualified double
pointers which are unusable w...

previous fix was backwards and propagated the wrong type rather than
the right one...