From a334319f6530564d22e775935d9c91663623a1b4 Mon Sep 17 00:00:00 2001 From: Ulrich Drepper Date: Wed, 22 Dec 2004 20:10:10 +0000 Subject: (CFLAGS-tst-align.c): Add -mpreferred-stack-boundary=4. --- linuxthreads/sysdeps/pthread/getcpuclockid.c | 49 ++++++++++++++++++++++++++++ 1 file changed, 49 insertions(+) create mode 100644 linuxthreads/sysdeps/pthread/getcpuclockid.c (limited to 'linuxthreads/sysdeps/pthread/getcpuclockid.c') diff --git a/linuxthreads/sysdeps/pthread/getcpuclockid.c b/linuxthreads/sysdeps/pthread/getcpuclockid.c new file mode 100644 index 0000000000..032caeb081 --- /dev/null +++ b/linuxthreads/sysdeps/pthread/getcpuclockid.c @@ -0,0 +1,49 @@ +/* Copyright (C) 2000, 2001, 2004 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + 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; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#include +#include +#include +#include +#include + +int +pthread_getcpuclockid (pthread_t thread_id, clockid_t *clock_id) +{ +#ifdef CLOCK_THREAD_CPUTIME_ID + /* We need to store the thread ID in the CLOCKID variable together + with a number identifying the clock. We reserve the low 3 bits + for the clock ID and the rest for the thread ID. This is + problematic if the thread ID is too large. But 29 bits should be + fine. + + If some day more clock IDs are needed the ID part can be + enlarged. The IDs are entirely internal. */ + if (2 * PTHREAD_THREADS_MAX + >= 1 << (8 * sizeof (*clock_id) - CLOCK_IDFIELD_SIZE)) + return ERANGE; + + /* Store the number. */ + *clock_id = CLOCK_THREAD_CPUTIME_ID | (thread_id << CLOCK_IDFIELD_SIZE); + + return 0; +#else + /* We don't have a timer for that. */ + return ENOENT; +#endif +} -- cgit v1.2.3-70-g09d2