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authorRoland McGrath <roland@gnu.org>2002-02-19 00:22:30 +0000
committerRoland McGrath <roland@gnu.org>2002-02-19 00:22:30 +0000
commit3a2832a07f0b5b72d457c788e2268232f22a1a67 (patch)
tree8e9f55d68d02df8bf654a1f4f74dfea987025654 /sysdeps/mach/msync.c
parent21297437bb37c5f1aedb615fd41e93efc12f556a (diff)
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* 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.
Diffstat (limited to 'sysdeps/mach/msync.c')
-rw-r--r--sysdeps/mach/msync.c57
1 files changed, 57 insertions, 0 deletions
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