diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/ia64/get_clockfreq.c')
-rw-r--r-- | sysdeps/unix/sysv/linux/ia64/get_clockfreq.c | 87 |
1 files changed, 0 insertions, 87 deletions
diff --git a/sysdeps/unix/sysv/linux/ia64/get_clockfreq.c b/sysdeps/unix/sysv/linux/ia64/get_clockfreq.c deleted file mode 100644 index 581f87f3e6..0000000000 --- a/sysdeps/unix/sysv/linux/ia64/get_clockfreq.c +++ /dev/null @@ -1,87 +0,0 @@ -/* Get frequency of the system processor. IA-64/Linux version. - Copyright (C) 2001-2019 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, see - <http://www.gnu.org/licenses/>. */ - -#include <ctype.h> -#include <fcntl.h> -#include <string.h> -#include <unistd.h> - - -hp_timing_t -__get_clockfreq (void) -{ - /* We read the information from the /proc filesystem. It contains at - least one line like - itc MHz : 733.390988 - We search for this line and convert the number in an integer. */ - static hp_timing_t result; - int fd; - - /* If this function was called before, we know the result. */ - if (result != 0) - return result; - - fd = __open ("/proc/cpuinfo", O_RDONLY); - if (__builtin_expect (fd != -1, 1)) - { - /* XXX AFAIK the /proc filesystem can generate "files" only up - to a size of 4096 bytes. */ - char buf[4096]; - ssize_t n; - - n = __read (fd, buf, sizeof buf); - if (__builtin_expect (n, 1) > 0) - { - char *mhz = memmem (buf, n, "itc MHz", 7); - - if (__builtin_expect (mhz != NULL, 1)) - { - char *endp = buf + n; - int seen_decpoint = 0; - int ndigits = 0; - - /* Search for the beginning of the string. */ - while (mhz < endp && (*mhz < '0' || *mhz > '9') && *mhz != '\n') - ++mhz; - - while (mhz < endp && *mhz != '\n') - { - if (*mhz >= '0' && *mhz <= '9') - { - result *= 10; - result += *mhz - '0'; - if (seen_decpoint) - ++ndigits; - } - else if (*mhz == '.') - seen_decpoint = 1; - - ++mhz; - } - - /* Compensate for missing digits at the end. */ - while (ndigits++ < 6) - result *= 10; - } - } - - __close (fd); - } - - return result; -} |