From 3782ffaf3e6c2a071df029b96712e596b5229838 Mon Sep 17 00:00:00 2001
From: Zhaoming Luo <zhmingluo@163.com>
Date: Mon, 6 Jan 2025 12:39:07 +0800
Subject: mach: Add CLOCK_MONOTONIC case in clock_gettime()

The Mach RPC host_get_uptime64() is implemented. It returns the elapsed time
value since bootup. See

https://git.savannah.gnu.org/cgit/hurd/gnumach.git/commit/?id=fc494bfe3fb6363e1077dc035eb119970d84a9d1

In this patch, the RPC is used to implement the monotonic clock for
mach.

* config.h.in: Add HAVE_HOST_GET_UPTIME64 config entry
* sysdeps/mach/clock_gettime.c: Add CLOCK_MONOTONIC case
* sysdeps/mach/configure: Check the existence of host_get_uptime64 RPC
* sysdeps/mach/configure.ac: Check the existence of host_get_uptime64 RPC

Message-ID: <20250106043907.1046-1-zhmingluo@163.com>
---
 sysdeps/mach/configure | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

(limited to 'sysdeps/mach/configure')

diff --git a/sysdeps/mach/configure b/sysdeps/mach/configure
index abfe084..8aa6bbb 100644
--- a/sysdeps/mach/configure
+++ b/sysdeps/mach/configure
@@ -461,6 +461,36 @@ if test $libc_cv_mach_rpc_host_page_size = yes; then
 
 fi
 
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for host_get_uptime64 in mach_host.defs" >&5
+printf %s "checking for host_get_uptime64 in mach_host.defs... " >&6; }
+if test ${libc_cv_mach_rpc_host_get_uptime64+y}
+then :
+  printf %s "(cached) " >&6
+else case e in #(
+  e) cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <mach/mach_host.defs>
+
+_ACEOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+  $EGREP_TRADITIONAL "host_get_uptime64" >/dev/null 2>&1
+then :
+  libc_cv_mach_rpc_host_get_uptime64=yes
+else case e in #(
+  e) libc_cv_mach_rpc_host_get_uptime64=no ;;
+esac
+fi
+rm -rf conftest*
+ ;;
+esac
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $libc_cv_mach_rpc_host_get_uptime64" >&5
+printf "%s\n" "$libc_cv_mach_rpc_host_get_uptime64" >&6; }
+if test $libc_cv_mach_rpc_host_get_uptime64 = yes; then
+  printf "%s\n" "#define HAVE_HOST_GET_UPTIME64 1" >>confdefs.h
+
+fi
+
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for thread_set_name in gnumach.defs" >&5
 printf %s "checking for thread_set_name in gnumach.defs... " >&6; }
 if test ${libc_cv_mach_rpc_thread_set_name+y}
-- 
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