lib/libc_r/uthread/uthread_msync.c

   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: src/lib/libc_r/uthread/uthread_msync.c,v 1.3.2.2 2002/10/22 14:44:03 fjoe Exp $
   7  * $DragonFly: src/lib/libc_r/uthread/uthread_msync.c,v 1.2 2003/06/17 04:26:48 dillon Exp $
   8  */
   9
  10 #include <sys/types.h>
  11 #include <sys/mman.h>
  12 #include <pthread.h>
  13 #include "pthread_private.h"
  14
  15 int
  16 _msync(void *addr, size_t len, int flags)
  17 {
  18         int ret;
  19
  20         ret = __sys_msync(addr, len, flags);
  21
  22         return (ret);
  23 }
  24
  25 int
  26 msync(void *addr, size_t len, int flags)
  27 {
  28         int     ret;
  29
  30         /*
  31          * XXX This is quite pointless unless we know how to get the
  32          * file descriptor associated with the memory, and lock it for
  33          * write. The only real use of this wrapper is to guarantee
  34          * a cancellation point, as per the standard. sigh.
  35          */
  36         _thread_enter_cancellation_point();
  37         ret = _msync(addr, len, flags);
  38         _thread_leave_cancellation_point();
  39
  40         return ret;
  41 }