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authorAustin Foxley <austinf@cetoncorp.com>2009-10-17 12:26:24 -0700
committerAustin Foxley <austinf@cetoncorp.com>2009-10-17 12:26:24 -0700
commitc68d0fa2d88fc2134a38d99e7e944828384a7671 (patch)
tree6596943bd1c77f18d6e49d4153ddd3f3d67b49f5 /libpthread/nptl/pthread_clock_settime.c
parent9a03e98a3b418f33c347a6023e9320f3a42cb9e4 (diff)
libpthread/nptl: core of the "Native Posix Threading Library" for uClibc
targetting arm,sh,i386,mips,sparc for now Signed-off-by: Austin Foxley <austinf@cetoncorp.com>
Diffstat (limited to 'libpthread/nptl/pthread_clock_settime.c')
-rw-r--r--libpthread/nptl/pthread_clock_settime.c56
1 files changed, 56 insertions, 0 deletions
diff --git a/libpthread/nptl/pthread_clock_settime.c b/libpthread/nptl/pthread_clock_settime.c
new file mode 100644
index 000000000..61002a8f7
--- /dev/null
+++ b/libpthread/nptl/pthread_clock_settime.c
@@ -0,0 +1,56 @@
+/* Copyright (C) 2001, 2002, 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; 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 <stdlib.h>
+#include <time.h>
+#include <libc-internal.h>
+#include "pthreadP.h"
+
+
+#if HP_TIMING_AVAIL
+int
+__pthread_clock_settime (clockid_t clock_id, hp_timing_t offset)
+{
+ /* This is the ID of the thread we are looking for. */
+ pid_t tid = ((unsigned int) clock_id) >> CLOCK_IDFIELD_SIZE;
+
+ /* Compute the offset since the start time of the process. */
+ if (tid == 0 || tid == THREAD_GETMEM (THREAD_SELF, tid))
+ /* Our own clock. */
+ THREAD_SETMEM (THREAD_SELF, cpuclock_offset, offset);
+ else
+ {
+ /* This is more complicated. We have to locate the thread based
+ on the ID. This means walking the list of existing
+ threads. */
+ struct pthread *thread = __find_thread_by_id (tid);
+ if (thread == NULL)
+ {
+ __set_errno (EINVAL);
+ return -1;
+ }
+
+ /* There is a race here. The thread might terminate and the stack
+ become unusable. But this is the user's problem. */
+ thread->cpuclock_offset = offset;
+ }
+
+ return 0;
+}
+#endif