diff options
Diffstat (limited to 'libc/nptl/pthread_mutexattr_getprioceiling.c')
-rw-r--r-- | libc/nptl/pthread_mutexattr_getprioceiling.c | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/libc/nptl/pthread_mutexattr_getprioceiling.c b/libc/nptl/pthread_mutexattr_getprioceiling.c new file mode 100644 index 000000000..792e9a43d --- /dev/null +++ b/libc/nptl/pthread_mutexattr_getprioceiling.c @@ -0,0 +1,48 @@ +/* Get priority ceiling setting from pthread_mutexattr_t. + Copyright (C) 2006 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Jakub Jelinek <jakub@redhat.com>, 2006. + + 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 <pthreadP.h> + + +int +pthread_mutexattr_getprioceiling (attr, prioceiling) + const pthread_mutexattr_t *attr; + int *prioceiling; +{ + const struct pthread_mutexattr *iattr; + int ceiling; + + iattr = (const struct pthread_mutexattr *) attr; + + ceiling = ((iattr->mutexkind & PTHREAD_MUTEXATTR_PRIO_CEILING_MASK) + >> PTHREAD_MUTEXATTR_PRIO_CEILING_SHIFT); + + if (! ceiling) + { + if (__sched_fifo_min_prio == -1) + __init_sched_fifo_prio (); + if (ceiling < __sched_fifo_min_prio) + ceiling = __sched_fifo_min_prio; + } + + *prioceiling = ceiling; + + return 0; +} |