summaryrefslogtreecommitdiff
path: root/lib/libc_r/uthread/uthread_msync.c
blob: 246cdde7226e25783999eea45f16060484747240 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
/*
 * David Leonard <d@openbsd.org>, 1999. Public Domain.
 *
 * $OpenBSD: uthread_msync.c,v 1.1 1999/01/17 23:43:18 d Exp $
 */

#include <sys/types.h>
#include <sys/mman.h>
#ifdef _THREAD_SAFE
#include <pthread.h>
#include "pthread_private.h"

int
msync(addr, len, flags)
	void *addr;
	size_t len;
	int flags;
{
	int ret;

	/*
	 * XXX This is quite pointless unless we know how to get the
	 * file descriptor associated with the memory, and lock it for
	 * write. The only real use of this wrapper is to guarantee
	 * a cancellation point, as per the standard. sigh.
	 */
	_thread_enter_cancellation_point();
	ret = _thread_sys_msync(addr, len, flags);
	_thread_leave_cancellation_point();
	return (ret);
}
#endif