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authorMike Frysinger <vapier@gentoo.org>2006-01-31 05:05:15 +0000
committerMike Frysinger <vapier@gentoo.org>2006-01-31 05:05:15 +0000
commitcccc549ced940c85039c8ce263c8bb571f244afd (patch)
treeef77a870db7211ad6f511867fc56ee1a1a8b4c18 /libpthread/linuxthreads/ptclock_gettime.c
parente73b1211737842732951f9b9049294ef732e1ef0 (diff)
initial import of latest linuxthreads
Diffstat (limited to 'libpthread/linuxthreads/ptclock_gettime.c')
-rw-r--r--libpthread/linuxthreads/ptclock_gettime.c69
1 files changed, 69 insertions, 0 deletions
diff --git a/libpthread/linuxthreads/ptclock_gettime.c b/libpthread/linuxthreads/ptclock_gettime.c
new file mode 100644
index 000000000..755f83d10
--- /dev/null
+++ b/libpthread/linuxthreads/ptclock_gettime.c
@@ -0,0 +1,69 @@
+/* Copyright (C) 2001, 2004 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; 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 <errno.h>
+#include <time.h>
+#include <libc-internal.h>
+#include "internals.h"
+#include "spinlock.h"
+
+
+#if HP_TIMING_AVAIL
+int
+__pthread_clock_gettime (clockid_t clock_id, hp_timing_t freq,
+ struct timespec *tp)
+{
+ hp_timing_t tsc, cpuclock_offset;
+ pthread_descr self = thread_self ();
+ pthread_t thread = ((unsigned int) clock_id) >> CLOCK_IDFIELD_SIZE;
+ const unsigned int mask = ~0U >> CLOCK_IDFIELD_SIZE;
+
+ if (thread == 0 || (THREAD_GETMEM (self, p_tid) & mask) == thread)
+ cpuclock_offset = THREAD_GETMEM (self, p_cpuclock_offset);
+ else
+ {
+ pthread_descr th;
+ pthread_handle handle = thread_handle (thread);
+ __pthread_lock (&handle->h_lock, NULL);
+ th = handle->h_descr;
+ if (th == NULL || (th->p_tid & mask) != thread || th->p_terminated)
+ {
+ __pthread_unlock (&handle->h_lock);
+ __set_errno (EINVAL);
+ return -1;
+ }
+ cpuclock_offset = th->p_cpuclock_offset;
+ __pthread_unlock (&handle->h_lock);
+ }
+
+ /* Get the current counter. */
+ HP_TIMING_NOW (tsc);
+
+ /* Compute the offset since the start time of the process. */
+ tsc -= cpuclock_offset;
+
+ /* Compute the seconds. */
+ tp->tv_sec = tsc / freq;
+
+ /* And the nanoseconds. This computation should be stable until
+ we get machines with about 16GHz frequency. */
+ tp->tv_nsec = ((tsc % freq) * 1000000000ull) / freq;
+
+ return 0;
+}
+#endif