thr_msync.c revision 103388 
1/*
2 * David Leonard <d@openbsd.org>, 1999. Public Domain.
3 *
4 * $OpenBSD: uthread_msync.c,v 1.2 1999/06/09 07:16:17 d Exp $
5 *
6 * $FreeBSD: head/lib/libkse/thread/thr_msync.c 103388 2002-09-16 08:45:36Z mini $
7 */
8
9#include <sys/types.h>
10#include <sys/mman.h>
11#include <pthread.h>
12#include "thr_private.h"
13
14__weak_reference(__msync, msync);
15
16int
17_msync(void *addr, size_t len, int flags)
18{
19	int ret;
20
21	ret = __sys_msync(addr, len, flags);
22
23	return (ret);
24}
25
26int
27__msync(void *addr, size_t len, int flags)
28{
29	int	ret;
30
31	/*
32	 * XXX This is quite pointless unless we know how to get the
33	 * file descriptor associated with the memory, and lock it for
34	 * write. The only real use of this wrapper is to guarantee
35	 * a cancellation point, as per the standard. sigh.
36	 */
37	_thread_enter_cancellation_point();
38	ret = _msync(addr, len, flags);
39	_thread_leave_cancellation_point();
40
41	return ret;
42}
43