diff options
author | Eric Andersen <andersen@codepoet.org> | 2005-05-20 19:02:51 +0000 |
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committer | Eric Andersen <andersen@codepoet.org> | 2005-05-20 19:02:51 +0000 |
commit | 124af9f4b2b77b1510d88cfc8092c788d7e513c7 (patch) | |
tree | ccce720bef4c1c604417e2082cf9997a8d6dd7ab /libpthread/nptl/DESIGN-barrier.txt | |
parent | 8028f35dbe29c5ace3883005e08ac91d873553b2 (diff) |
Back out nptl changes, which for now will be done in branches/uClibc-nptl
Diffstat (limited to 'libpthread/nptl/DESIGN-barrier.txt')
-rw-r--r-- | libpthread/nptl/DESIGN-barrier.txt | 44 |
1 files changed, 0 insertions, 44 deletions
diff --git a/libpthread/nptl/DESIGN-barrier.txt b/libpthread/nptl/DESIGN-barrier.txt deleted file mode 100644 index 23463c6b7..000000000 --- a/libpthread/nptl/DESIGN-barrier.txt +++ /dev/null @@ -1,44 +0,0 @@ -Barriers pseudocode -=================== - - int pthread_barrier_wait(barrier_t *barrier); - -struct barrier_t { - - unsigned int lock: - - internal mutex - - unsigned int left; - - current barrier count, # of threads still needed. - - unsigned int init_count; - - number of threads needed for the barrier to continue. - - unsigned int curr_event; - - generation count -} - -pthread_barrier_wait(barrier_t *barrier) -{ - unsigned int event; - result = 0; - - lll_lock(barrier->lock); - if (!--barrier->left) { - barrier->curr_event++; - futex_wake(&barrier->curr_event, INT_MAX) - - result = BARRIER_SERIAL_THREAD; - } else { - event = barrier->curr_event; - lll_unlock(barrier->lock); - do { - futex_wait(&barrier->curr_event, event) - } while (event == barrier->curr_event); - } - - if (atomic_increment_val (barrier->left) == barrier->init_count) - lll_unlock(barrier->lock); - - return result; -} |