7285bccf1a
eischen (Daniel Eischen) added wrappers to protect against cancled threads orphaning internal resources. the cancelability code is still a bit fuzzy but works for test programs of my own, OpenBSD's and some examples from ORA's books. add readdir_r to both libc and libc_r add some 'const' attributes to function parameters Reviewed by: eischen, jasone
41 lines
814 B
C
41 lines
814 B
C
/*
|
|
* David Leonard <d@openbsd.org>, 1999. Public Domain.
|
|
*
|
|
* $OpenBSD: uthread_msync.c,v 1.2 1999/06/09 07:16:17 d Exp $
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#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.
|
|
*/
|
|
|
|
/* This is a cancellation point: */
|
|
_thread_enter_cancellation_point();
|
|
|
|
ret = _thread_sys_msync(addr, len, flags);
|
|
|
|
/* No longer in a cancellation point: */
|
|
_thread_leave_cancellation_point();
|
|
|
|
return (ret);
|
|
}
|
|
#endif
|