musl/src/thread/pthread_mutex_timedlock.c, branch v0.8.0 musl - an implementation of the standard library for Linux-based systems unify and overhaul timed futex waits 2011-08-03T01:11:36+00:00 Rich Felker dalias@aerifal.cx 2011-08-03T01:11:36+00:00 ec381af90208a5675183202cf05078eac208edfb new features: - FUTEX_WAIT_BITSET op will be used for timed waits if available. this saves a call to clock_gettime. - error checking for the timespec struct is now inside __timedwait so it doesn't need to be duplicated everywhere. cond_timedwait still needs to duplicate it to avoid unlocking the mutex, though. - pushing and popping the cancellation handler is delegated to __timedwait, and cancellable/non-cancellable waits are unified. 
new features:

- FUTEX_WAIT_BITSET op will be used for timed waits if available. this
  saves a call to clock_gettime.

- error checking for the timespec struct is now inside __timedwait so
  it doesn't need to be duplicated everywhere. cond_timedwait still
  needs to duplicate it to avoid unlocking the mutex, though.

- pushing and popping the cancellation handler is delegated to
  __timedwait, and cancellable/non-cancellable waits are unified.
avoid accessing mutex memory after atomic unlock 2011-08-03T00:31:15+00:00 Rich Felker dalias@aerifal.cx 2011-08-03T00:31:15+00:00 c68de0be2fb649f91b31080224fb6e48084eaaee this change is needed to fix a race condition and ensure that it's possible to unlock and destroy or unmap the mutex as soon as pthread_mutex_lock succeeds. POSIX explicitly gives such an example in the rationale and requires an implementation to allow such usage. 
this change is needed to fix a race condition and ensure that it's
possible to unlock and destroy or unmap the mutex as soon as
pthread_mutex_lock succeeds. POSIX explicitly gives such an example in
the rationale and requires an implementation to allow such usage.
implement robust mutexes 2011-03-18T00:41:37+00:00 Rich Felker dalias@aerifal.cx 2011-03-18T00:41:37+00:00 047e434ef5fd5437a74f98f63c40a77a683f7f3f 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. 
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.
reorganize pthread data structures and move the definitions to alltypes.h 2011-02-17T22:16:20+00:00 Rich Felker dalias@aerifal.cx 2011-02-17T22:16:20+00:00 e882756311c7b06e59fcc8e582f03852b7dcfd30 this allows sys/types.h to provide the pthread types, as required by POSIX. this design also facilitates forcing ABI-compatible sizes in the arch-specific alltypes.h, while eliminating the need for developers changing the internals of the pthread types to poke around with arch-specific headers they may not be able to test. 
this allows sys/types.h to provide the pthread types, as required by
POSIX. this design also facilitates forcing ABI-compatible sizes in
the arch-specific alltypes.h, while eliminating the need for
developers changing the internals of the pthread types to poke around
with arch-specific headers they may not be able to test.
initial check-in, version 0.5.0 2011-02-12T05:22:29+00:00 Rich Felker dalias@aerifal.cx 2011-02-12T05:22:29+00:00 0b44a0315b47dd8eced9f3b7f31580cf14bbfc01