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_condattr_setclock.c | 72 +++++++++++++++++++++++++++++ 1 file changed, 72 insertions(+) create mode 100644 libpthread/nptl/pthread_condattr_setclock.c (limited to 'libpthread/nptl/pthread_condattr_setclock.c') diff --git a/libpthread/nptl/pthread_condattr_setclock.c b/libpthread/nptl/pthread_condattr_setclock.c new file mode 100644 index 000000000..6dc25636a --- /dev/null +++ b/libpthread/nptl/pthread_condattr_setclock.c @@ -0,0 +1,72 @@ +/* Copyright (C) 2003, 2004 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Ulrich Drepper , 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, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include +#include +#include +#include +#include +#include "pthreadP.h" +#include + + +int +pthread_condattr_setclock (attr, clock_id) + pthread_condattr_t *attr; + clockid_t clock_id; +{ + /* Only a few clocks are allowed. CLOCK_REALTIME is always allowed. + CLOCK_MONOTONIC only if the kernel has the necessary support. */ + if (clock_id == CLOCK_MONOTONIC) + { +#ifndef __ASSUME_POSIX_TIMERS +# ifdef __NR_clock_getres + /* Check whether the clock is available. */ + static int avail; + + if (avail == 0) + { + struct timespec ts; + + INTERNAL_SYSCALL_DECL (err); + int val; + val = INTERNAL_SYSCALL (clock_getres, err, 2, CLOCK_MONOTONIC, &ts); + avail = INTERNAL_SYSCALL_ERROR_P (val, err) ? -1 : 1; + } + + if (avail < 0) +# endif + /* Not available. */ + return EINVAL; +#endif + } + else if (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; + + /* 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; +} -- cgit v1.2.3