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author | Ulrich Drepper <drepper@redhat.com> | 2001-04-23 19:01:10 +0000 |
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committer | Ulrich Drepper <drepper@redhat.com> | 2001-04-23 19:01:10 +0000 |
commit | 3b5c1b57d3a2de7955eed21f01cb80e663473491 (patch) | |
tree | 3adc1685dfb18a5b08067aaa4b4143f31c2d84e7 /sysdeps/unix/sysv/linux/ia64/get_clockfreq.c | |
parent | bc183edc4e9fb3bd3bf68a99592e5b9e6a850d79 (diff) | |
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Update.
* sysdeps/unix/i386/i586/clock_getres.c: Removed.
* sysdeps/unix/i386/i586/clock_gettime.c: Removed.
* sysdeps/unix/i386/i586/clock_nanosleep.c: Removed.
* sysdeps/unix/i386/i586/clock_settime.c: Removed.
* sysdeps/unix/i386/i586/cpuclock-init.h: Removed.
* sysdeps/generic/cpuclock-init.h: Removed.
* sysdeps/unix/i386/i686/Implies: Removed.
* sysdeps/unix/i386/i686/tempname.c: Removed.
* sysdeps/i386/i686/Versions: New file.
* sysdeps/unix/i386/i586/Versions: Removed.
* sysdeps/posix/clock_getres.c: If HP_TIMING_AVAIL is nonzero handle
CLOCK_PROCESS_CPUTIME_ID and CLOCK_THREAD_CPUTIME_ID.
* sysdeps/unix/clock_gettime.c: Likewise.
* sysdeps/unix/clock_nanosleep.c: Likewise.
* sysdeps/unix/clock_settime.c: Likewise.
* sysdeps/posix/tempname.c: Is HP_TIMING_AVAIL is nonzero define
RANDOM_BITS use CPU clock.
* sysdeps/unix/sysv/linux/sparc/sparc32/sparcv9/bits/time.h: New file.
* sysdeps/unix/sysv/linux/sparc/sparc32/sparcv9b/bits/time.h: New file.
* sysdeps/unix/sysv/linux/sparc/sparc64/bits/time.h: New file.
* sysdeps/sparc/Versions: New file.
* elf/dl-support.c: Don't use cpuclock-init.h definitions, use
hp-timing.h definitions.
* sysdeps/generic/dl-sysdep.c: Likewise.
* include/libc-internal.h: Include hp-timing.h. Use hp_timing_t in
__get_clockfreq prototype.
* sysdeps/unix/sysv/linux/i386/get_clockfreq.c (__get_clockfreq):
Use hp_timing_t type.
* sysdeps/unix/sysv/linux/ia64/get_clockfreq.c: New file.
Diffstat (limited to 'sysdeps/unix/sysv/linux/ia64/get_clockfreq.c')
-rw-r--r-- | sysdeps/unix/sysv/linux/ia64/get_clockfreq.c | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/ia64/get_clockfreq.c b/sysdeps/unix/sysv/linux/ia64/get_clockfreq.c new file mode 100644 index 0000000000..77106eadb7 --- /dev/null +++ b/sysdeps/unix/sysv/linux/ia64/get_clockfreq.c @@ -0,0 +1,89 @@ +/* Get frequency of the system processor. IA-64/Linux version. + Copyright (C) 2001 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 Library General Public License as + published by the Free Software Foundation; either version 2 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library 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 <ctype.h> +#include <fcntl.h> +#include <string.h> +#include <unistd.h> +#include <libc-internal.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; +} |