From 9939a13667567dd4b0c3496953d99b87a6995208 Mon Sep 17 00:00:00 2001
From: David Xu <davidxu@FreeBSD.org>
Date: Sat, 22 Mar 2008 09:59:20 +0000
Subject: [PATCH] Add POSIX pthread API pthread_getcpuclockid() to get a
 thread's cpu time clock id.

---
 include/pthread.h                     |  1 +
 include/time.h                        |  1 +
 lib/libthr/pthread.map                |  2 ++
 lib/libthr/thread/Makefile.inc        |  1 +
 lib/libthr/thread/thr_getcpuclockid.c | 47 +++++++++++++++++++++++++++
 5 files changed, 52 insertions(+)
 create mode 100644 lib/libthr/thread/thr_getcpuclockid.c

diff --git a/include/pthread.h b/include/pthread.h
index 361b45ce91e0..215b88258fec 100644
--- a/include/pthread.h
+++ b/include/pthread.h
@@ -185,6 +185,7 @@ int		pthread_detach(pthread_t);
 int		pthread_equal(pthread_t, pthread_t);
 void		pthread_exit(void *) __dead2;
 void		*pthread_getspecific(pthread_key_t);
+int		pthread_getcpuclockid(pthread_t, clockid_t *);
 int		pthread_join(pthread_t, void **);
 int		pthread_key_create(pthread_key_t *,
 			void (*) (void *));
diff --git a/include/time.h b/include/time.h
index 69a41c2451ee..d28d9b48b905 100644
--- a/include/time.h
+++ b/include/time.h
@@ -108,6 +108,7 @@ typedef	__timer_t	timer_t;
 #define CLOCK_MONOTONIC_PRECISE	11	/* FreeBSD-specific. */
 #define CLOCK_MONOTONIC_FAST	12	/* FreeBSD-specific. */
 #define CLOCK_SECOND	13		/* FreeBSD-specific. */
+#define CLOCK_THREAD_CPUTIME_ID	14
 #endif /* !defined(CLOCK_REALTIME) && __POSIX_VISIBLE >= 200112 */
 
 #if !defined(TIMER_ABSTIME) && __POSIX_VISIBLE >= 200112
diff --git a/lib/libthr/pthread.map b/lib/libthr/pthread.map
index 3cc3927aa4bf..21a013590845 100644
--- a/lib/libthr/pthread.map
+++ b/lib/libthr/pthread.map
@@ -271,6 +271,7 @@ FBSDprivate_1.0 {
 	_pthread_exit;
 	_pthread_getaffinity_np;
 	_pthread_getconcurrency;
+	_pthread_getcpuclockid;
 	_pthread_getprio;
 	_pthread_getschedparam;
 	_pthread_getspecific;
@@ -395,6 +396,7 @@ FBSD_1.1 {
 	pthread_attr_getaffinity_np;
 	pthread_attr_setaffinity_np;
 	pthread_getaffinity_np;
+	pthread_getcpuclockid;
 	pthread_setaffinity_np;
 	pthread_mutex_getspinloops_np;
 	pthread_mutex_getyieldloops_np;
diff --git a/lib/libthr/thread/Makefile.inc b/lib/libthr/thread/Makefile.inc
index 6a5105ff0c97..4ce90b55dcae 100644
--- a/lib/libthr/thread/Makefile.inc
+++ b/lib/libthr/thread/Makefile.inc
@@ -20,6 +20,7 @@ SRCS+= \
 	thr_exit.c \
 	thr_fork.c \
 	thr_getprio.c \
+	thr_getcpuclockid.c \
 	thr_getschedparam.c \
 	thr_info.c \
 	thr_init.c \
diff --git a/lib/libthr/thread/thr_getcpuclockid.c b/lib/libthr/thread/thr_getcpuclockid.c
new file mode 100644
index 000000000000..68f88d52a7e0
--- /dev/null
+++ b/lib/libthr/thread/thr_getcpuclockid.c
@@ -0,0 +1,47 @@
+/*
+ * Copyright (c) 2008 David Xu <davidxu@freebsd.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+#include "namespace.h"
+#include <errno.h>
+#include <pthread.h>
+#include <sys/time.h>
+#include "un-namespace.h"
+
+#include "thr_private.h"
+
+__weak_reference(_pthread_getcpuclockid, pthread_getcpuclockid);
+
+int
+_pthread_getcpuclockid(pthread_t pthread, clockid_t *clock_id)
+{
+	if (pthread == NULL)
+		return (EINVAL);
+
+	*clock_id = CLOCK_THREAD_CPUTIME_ID;
+	return (0);
+}