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Diffstat (limited to 'NEWS')
| -rw-r--r-- | NEWS | 66 |
1 files changed, 66 insertions, 0 deletions
@@ -1,3 +1,69 @@ +SNAPSHOT 2004-11-03 +------------------- + +DLLs produced from this snapshot cannot be used with older applications without +recompiling the application, due to a change to pthread_t to provide unique POSIX +thread IDs. + +Although this snapshot passes the extended test suite, many of the changes are +fairly major, and some applications may show different behaviour than previously, +so adopt with care. Hopefully, any changed behaviour will be due to the library +being better at it's job, not worse. + +Bug fixes +--------- + +* pthread_create() no longer accepts NULL as the thread reference arg. +A segfault (memory access fault) will result, and no thread will be +created. + +* pthread_barrier_wait() no longer acts as a cancelation point. + +* Fix potential race condition in pthread_once() +- Tristan Savatier <tristan at mpegtv.com> + +* Changes to pthread_cond_destroy() exposed some coding weaknesses in several +test suite mini-apps because pthread_cond_destroy() now returns EBUSY if the CV +is still in use. + +New features +------------ + +* Added for compatibility: +PTHREAD_RECURSIVE_MUTEX_INITIALIZER, +PTHREAD_ERRORCHECK_MUTEX_INITIALIZER, +PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP, +PTHREAD_ERRORCHECK_MUTEX_INITIALIZER_NP + +* Initial support for Digital Mars compiler +- Anuj Goyal <anuj.goyal at gmail.com> + +* Faster Mutexes. These have been been rewritten following a model provided by +Alexander Terekhov that reduces kernel space checks, and eliminates some additional +critical sections used to manage a race between timedlock expiration and unlock. +Please be aware that the new mutexes do not enforce strict absolute FIFO scheduling +of mutexes, however any out-of-order lock acquisition should be very rare. + +* Faster semaphores. Following a similar model to mutexes above, these have been +rewritten to use preliminary users space checks. + +* sem_getvalue() now returns the number of waiters. + +* The POSIX thread ID now has much stronger uniqueness characteristics. The library +garrantees not to reuse the same thread ID for at least 2^(wordsize) thread +destruction/creation cycles. + +New tests +--------- + +* semaphore4.c: Tests cancelation of the new sem_wait(). + +* semaphore4t.c: Likewise for sem_timedwait(). + +* rwlock8.c: Tests and times the slow execution paths of r/w locks, and the CVs, +mutexes, and semaphores that they're built on. + + SNAPSHOT 2004-05-16 ------------------- |