From 3a2832a07f0b5b72d457c788e2268232f22a1a67 Mon Sep 17 00:00:00 2001
From: Roland McGrath <roland@gnu.org>
Date: Tue, 19 Feb 2002 00:22:30 +0000
Subject: * sysdeps/mach/hurd/times.c: Fix typo in last change.

	* sysdeps/mach/hurd/setpriority.c [POLICY_TIMESHARE_BASE_COUNT]:
	Use task_policy in place of task_priority.

	* sysdeps/generic/bits/mman.h
	(MS_ASYNC, MS_SYNC, MS_INVALIDATE): New macros.
	* sysdeps/mach/msync.c: New file.

	* sysdeps/mach/powerpc/syscall.S: New file.

	* mach/msg.c [MACH_MSG_OVERWRITE]
	(__mach_msg_trap, __mach_msg_overwrite): New functions.
	* mach/Versions (libc: GLIBC_2.0): Add mach_msg_overwrite and __ name.

	* sysdeps/mach/configure.in: Check for clock.defs to put into
	mach_interface_list.
	* sysdeps/mach/configure: Regenerated.

	* mach/Makefile (mach-machine): New variable, set from $(base-machine).
	($(objpfx)mach-syscalls.mk): Use it in place of $(base-machine).
	($(mach-syscalls:%=$(objpfx)%.S) static pattern rule):
	Use <mach/machine/syscall_sw.h> instead of <sysdep.h>.
	(mach-shortcuts): Add device_read_overwrite_request,
	device_read_overwrite, vm_read_overwrite, thread_switch.

	* configure.in (base_machine): Set to $machine by default.
	* configure: Regenerated.
---
 sysdeps/mach/msync.c | 57 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 57 insertions(+)
 create mode 100644 sysdeps/mach/msync.c

(limited to 'sysdeps/mach/msync.c')

diff --git a/sysdeps/mach/msync.c b/sysdeps/mach/msync.c
new file mode 100644
index 0000000000..cf62960b4f
--- /dev/null
+++ b/sysdeps/mach/msync.c
@@ -0,0 +1,57 @@
+/* msync -- Synchronize mapped memory to external storage.  Mach version.
+   Copyright (C) 2002 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; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#include <sys/types.h>
+#include <sys/mman.h>
+#include <errno.h>
+#include <mach.h>
+
+/* Some Mach variants have vm_msync and some don't.  Those that have it
+   define the VM_SYNC_* bits when we include <mach/mach_types.h>.  */
+
+#ifndef VM_SYNC_SYNCHRONOUS
+# include <sysdeps/generic/msync.c>
+#else
+
+/* Synchronize the region starting at ADDR and extending LEN bytes with the
+   file it maps.  Filesystem operations on a file being mapped are
+   unpredictable before this is done.  */
+
+int
+msync (__ptr_t addr, size_t len, int flags)
+{
+  vm_sync_t sync_flags = 0;
+  kern_return_t err;
+
+  if (flags & MS_SYNC)
+    sync_flags |= VM_SYNC_SYNCHRONOUS;
+  if (flags & MS_ASYNC)
+    sync_flags |= VM_SYNC_ASYNCHRONOUS;
+  if (flags & MS_INVALIDATE)
+    sync_flags |= VM_SYNC_INVALIDATE;
+
+  if (err = __vm_msync (__mach_task_self (),
+			(vm_address_t) addr, (vm_size_t) len, sync_flags))
+    {
+      errno = err;
+      return -1;
+    }
+  return 0;
+}
+#endif
-- 
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