From c68d0fa2d88fc2134a38d99e7e944828384a7671 Mon Sep 17 00:00:00 2001 From: Austin Foxley Date: Sat, 17 Oct 2009 12:26:24 -0700 Subject: libpthread/nptl: core of the "Native Posix Threading Library" for uClibc targetting arm,sh,i386,mips,sparc for now Signed-off-by: Austin Foxley --- libpthread/nptl/pthread_cond_destroy.c | 59 ++++++++++++++++++++++++++++++++++ 1 file changed, 59 insertions(+) create mode 100644 libpthread/nptl/pthread_cond_destroy.c (limited to 'libpthread/nptl/pthread_cond_destroy.c') diff --git a/libpthread/nptl/pthread_cond_destroy.c b/libpthread/nptl/pthread_cond_destroy.c new file mode 100644 index 000000000..b7842d258 --- /dev/null +++ b/libpthread/nptl/pthread_cond_destroy.c @@ -0,0 +1,59 @@ +/* Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Ulrich Drepper , 2002. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include +#include "pthreadP.h" + + +int +__pthread_cond_destroy (cond) + pthread_cond_t *cond; +{ + /* Make sure we are alone. */ + lll_mutex_lock (cond->__data.__lock); + + if (cond->__data.__total_seq > cond->__data.__wakeup_seq) + { + /* If there are still some waiters which have not been + woken up, this is an application bug. */ + lll_mutex_unlock (cond->__data.__lock); + return EBUSY; + } + + /* Tell pthread_cond_*wait that this condvar is being destroyed. */ + cond->__data.__total_seq = -1ULL; + + /* If there are waiters which have been already signalled or + broadcasted, but still are using the pthread_cond_t structure, + pthread_cond_destroy needs to wait for them. */ + unsigned int nwaiters = cond->__data.__nwaiters; + while (nwaiters >= (1 << COND_CLOCK_BITS)) + { + lll_mutex_unlock (cond->__data.__lock); + + lll_futex_wait (&cond->__data.__nwaiters, nwaiters); + + lll_mutex_lock (cond->__data.__lock); + + nwaiters = cond->__data.__nwaiters; + } + + return 0; +} +weak_alias(__pthread_cond_destroy, pthread_cond_destroy) -- cgit v1.2.3