From 092eb73ca2507c29adb37cd8075730e43c1e3794 Mon Sep 17 00:00:00 2001 From: Ulrich Drepper Date: Thu, 11 Dec 2003 20:46:47 +0000 Subject: Update. 2003-12-01 Jes Sorensen * rt/tst-clock.c (do_test): Print message when skipping CLOCK_PROCESS_CPUTIME_ID test. * sysdeps/unix/sysv/linux/ia64/clock_getcpuclockid.c: New file. Provide CLOCK_PROCESS_CPUTIME_ID only if /proc/sal/itc_drift is 0. peek_token. This avoids some copying and reduces code size. (init_dfa): Initialize map_notascii. (build_wcs_upper_buffer): If map_notascii is zero use simplified --- sysdeps/unix/sysv/linux/ia64/clock_getcpuclockid.c | 65 ++++++++++++++++++++++ 1 file changed, 65 insertions(+) create mode 100644 sysdeps/unix/sysv/linux/ia64/clock_getcpuclockid.c (limited to 'sysdeps/unix/sysv/linux/ia64/clock_getcpuclockid.c') diff --git a/sysdeps/unix/sysv/linux/ia64/clock_getcpuclockid.c b/sysdeps/unix/sysv/linux/ia64/clock_getcpuclockid.c new file mode 100644 index 0000000000..68e5763a8c --- /dev/null +++ b/sysdeps/unix/sysv/linux/ia64/clock_getcpuclockid.c @@ -0,0 +1,65 @@ +/* Copyright (C) 2000, 2001, 2003 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; 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 + + +int +clock_getcpuclockid (pid_t pid, clockid_t *clock_id) +{ + /* We don't allow any process ID but our own. */ + if (pid != 0 && pid != getpid ()) + return EPERM; + + static int itc_usable; + int retval = ENOENT; + + if (__builtin_expect (itc_usable == 0, 0)) + { + int newval = 1; + int fd = open ("/proc/sal/itc_drift", O_RDONLY); + if (__builtin_expect (fd != -1, 1)) + { + char buf[16]; + /* We expect the file to contain a single digit followed by + a newline. If the format changes we better not rely on + the file content. */ + if (read (fd, buf, sizeof buf) != 2 || buf[0] != '0' + || buf[1] != '\n') + newval = -1; + + close (fd); + } + + itc_usable = newval; + } + + if (itc_usable > 0) + { + /* Store the number. */ + *clock_id = CLOCK_PROCESS_CPUTIME_ID; + retval = 0; + } + + return retval; +} -- cgit 1.4.1