diff options
Diffstat (limited to 'REORG.TODO/nptl/pthread_condattr_setclock.c')
-rw-r--r-- | REORG.TODO/nptl/pthread_condattr_setclock.c | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/REORG.TODO/nptl/pthread_condattr_setclock.c b/REORG.TODO/nptl/pthread_condattr_setclock.c new file mode 100644 index 0000000000..cd94171002 --- /dev/null +++ b/REORG.TODO/nptl/pthread_condattr_setclock.c @@ -0,0 +1,50 @@ +/* Copyright (C) 2003-2017 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Ulrich Drepper <drepper@redhat.com>, 2003. + + 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, see + <http://www.gnu.org/licenses/>. */ + +#include <assert.h> +#include <errno.h> +#include <futex-internal.h> +#include <time.h> +#include <sysdep.h> +#include "pthreadP.h" + + +int +pthread_condattr_setclock (pthread_condattr_t *attr, clockid_t clock_id) +{ + /* Only a few clocks are allowed. */ + if (clock_id != CLOCK_MONOTONIC && clock_id != CLOCK_REALTIME) + /* If more clocks are allowed some day the storing of the clock ID + in the pthread_cond_t structure needs to be adjusted. */ + return EINVAL; + + /* If we do not support waiting using CLOCK_MONOTONIC, return an error. */ + if (clock_id == CLOCK_MONOTONIC + && !futex_supports_exact_relative_timeouts()) + return ENOTSUP; + + /* Make sure the value fits in the bits we reserved. */ + assert (clock_id < (1 << COND_CLOCK_BITS)); + + int *valuep = &((struct pthread_condattr *) attr)->value; + + *valuep = ((*valuep & ~(((1 << COND_CLOCK_BITS) - 1) << 1)) + | (clock_id << 1)); + + return 0; +} |