diff options
Diffstat (limited to 'libc/nptl/pthread_mutexattr_setprioceiling.c')
-rw-r--r-- | libc/nptl/pthread_mutexattr_setprioceiling.c | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/libc/nptl/pthread_mutexattr_setprioceiling.c b/libc/nptl/pthread_mutexattr_setprioceiling.c new file mode 100644 index 000000000..9b7874f73 --- /dev/null +++ b/libc/nptl/pthread_mutexattr_setprioceiling.c @@ -0,0 +1,47 @@ +/* Change priority ceiling setting in 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 <errno.h> +#include <pthreadP.h> + + +int +pthread_mutexattr_setprioceiling (attr, prioceiling) + pthread_mutexattr_t *attr; + int prioceiling; +{ + if (__sched_fifo_min_prio == -1) + __init_sched_fifo_prio (); + + if (__builtin_expect (prioceiling < __sched_fifo_min_prio, 0) + || __builtin_expect (prioceiling > __sched_fifo_max_prio, 0) + || __builtin_expect ((prioceiling + & (PTHREAD_MUTEXATTR_PRIO_CEILING_MASK + >> PTHREAD_MUTEXATTR_PRIO_CEILING_SHIFT)) + != prioceiling, 0)) + return EINVAL; + + struct pthread_mutexattr *iattr = (struct pthread_mutexattr *) attr; + + iattr->mutexkind = ((iattr->mutexkind & ~PTHREAD_MUTEXATTR_PRIO_CEILING_MASK) + | (prioceiling << PTHREAD_MUTEXATTR_PRIO_CEILING_SHIFT)); + + return 0; +} |