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authorUlrich Drepper <drepper@redhat.com>2001-04-23 19:01:10 +0000
committerUlrich Drepper <drepper@redhat.com>2001-04-23 19:01:10 +0000
commit3b5c1b57d3a2de7955eed21f01cb80e663473491 (patch)
tree3adc1685dfb18a5b08067aaa4b4143f31c2d84e7 /sysdeps/unix/clock_settime.c
parentbc183edc4e9fb3bd3bf68a99592e5b9e6a850d79 (diff)
downloadglibc-3b5c1b57d3a2de7955eed21f01cb80e663473491.tar.gz
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/clock_settime.c')
-rw-r--r--sysdeps/unix/clock_settime.c58
1 files changed, 55 insertions, 3 deletions
diff --git a/sysdeps/unix/clock_settime.c b/sysdeps/unix/clock_settime.c
index 9155d4607d..69d6802b38 100644
--- a/sysdeps/unix/clock_settime.c
+++ b/sysdeps/unix/clock_settime.c
@@ -19,12 +19,26 @@
#include <errno.h>
#include <time.h>
#include <sys/time.h>
+#include <libc-internal.h>
-#ifndef EXTRA_CLOCK_CASES
-# define EXTRA_CLOCK_CASES
+#if HP_TIMING_AVAIL
+/* Clock frequency of the processor. We make it a 64-bit variable
+ because some jokers are already playing with processors with more
+ than 4GHz. */
+static hp_timing_t freq;
+
+
+/* We need the starting time for the process. */
+extern hp_timing_t _dl_cpuclock_offset;
+
+
+/* This function is defined in the thread library. */
+extern void __pthread_clock_settime (hp_timing_t offset)
+ __attribute__ ((__weak__));
#endif
+
/* Set CLOCK to value TP. */
int
clock_settime (clockid_t clock_id, const struct timespec *tp)
@@ -47,7 +61,45 @@ clock_settime (clockid_t clock_id, const struct timespec *tp)
retval = settimeofday (&tv, NULL);
break;
- EXTRA_CLOCK_CASES
+#if HP_TIMING_AVAIL
+ case CLOCK_PROCESS_CPUTIME_ID:
+ case CLOCK_THREAD_CPUTIME_ID:
+ {
+ hp_timing_t tsc;
+ hp_timing_t usertime;
+
+ /* First thing is to get the current time. */
+ HP_TIMING_NOW (tsc);
+
+ if (__builtin_expect (freq == 0, 0))
+ {
+ /* This can only happen if we haven't initialized the `freq'
+ variable yet. Do this now. We don't have to protect this
+ code against multiple execution since all of them should
+ lead to the same result. */
+ freq = __get_clockfreq ();
+ if (__builtin_expect (freq == 0, 0))
+ {
+ /* Something went wrong. */
+ retval = -1;
+ break;
+ }
+ }
+
+ /* Convert the user-provided time into CPU ticks. */
+ usertime = tp->tv_sec * freq + (tp->tv_nsec * freq) / 1000000000ull;
+
+ /* Determine the offset and use it as the new base value. */
+ if (clock_id != CLOCK_THREAD_CPUTIME_ID
+ || __pthread_clock_settime == NULL)
+ _dl_cpuclock_offset = tsc - usertime;
+ else
+ __pthread_clock_settime (tsc - usertime);
+
+ retval = 0;
+ }
+ break;
+#endif
default:
__set_errno (EINVAL);