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author | Ulrich Drepper <drepper@redhat.com> | 2003-12-11 20:46:47 +0000 |
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committer | Ulrich Drepper <drepper@redhat.com> | 2003-12-11 20:46:47 +0000 |
commit | 092eb73ca2507c29adb37cd8075730e43c1e3794 (patch) | |
tree | 3898bbd02791720be314b47950e2c19a06c68a4c /sysdeps/unix | |
parent | 209454572369b17c5c038e2bf5295b789799e072 (diff) | |
download | glibc-092eb73ca2507c29adb37cd8075730e43c1e3794.tar.gz glibc-092eb73ca2507c29adb37cd8075730e43c1e3794.tar.xz glibc-092eb73ca2507c29adb37cd8075730e43c1e3794.zip |
Update.
2003-12-01 Jes Sorensen <jes@wildopensource.com> * 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
Diffstat (limited to 'sysdeps/unix')
-rw-r--r-- | sysdeps/unix/sysv/linux/ia64/clock_getcpuclockid.c | 65 |
1 files changed, 65 insertions, 0 deletions
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 <errno.h> +#include <time.h> +#include <unistd.h> +#include <sys/stat.h> +#include <sys/types.h> +#include <fcntl.h> + + +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; +} |