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/*
* sync() - XXX ??? where is this defined
*
* This function operates by as follows:
* for all threads
* for all FILE *
* fsync()
* fdatasync()
*
* COPYRIGHT (c) 1989-2008.
* On-Line Applications Research Corporation (OAR).
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.com/license/LICENSE.
*/
#if HAVE_CONFIG_H
#include "config.h"
#endif
/* Since we compile with strict ANSI we need to undef it to get
* prototypes for extensions
*/
#undef __STRICT_ANSI__
int fdatasync(int); /* still not always prototyped */
#include <unistd.h>
#include <stdio.h>
#include <rtems.h>
/*
#define __RTEMS_VIOLATE_KERNEL_VISIBILITY__
#include <rtems/libio_.h>
#include <rtems/seterr.h>
*/
/* XXX check standards -- Linux version appears to be void */
void _fwalk(struct _reent *, void *);
static void sync_wrapper(FILE *f)
{
int fn = fileno(f);
/*
* We are explicitly NOT checking the return values as it does not
* matter if they succeed. We are just making a best faith attempt
* at both and trusting that we were passed a good FILE pointer.
*/
fsync(fn);
fdatasync(fn);
}
/* iterate over all FILE *'s for this thread */
static void sync_per_thread(Thread_Control *t)
{
struct _reent *current_reent;
struct _reent *this_reent;
/*
* The sync_wrapper() function will operate on the current thread's
* reent structure so we will temporarily use that.
*/
this_reent = t->libc_reent;
if ( this_reent ) {
current_reent = _Thread_Executing->libc_reent;
_Thread_Executing->libc_reent = this_reent;
_fwalk (t->libc_reent, sync_wrapper);
_Thread_Executing->libc_reent = current_reent;
}
}
/*
* _global_impure_ptr is not prototyped in any .h files.
* We have to extern it here.
*/
extern struct _reent * const _global_impure_ptr __ATTRIBUTE_IMPURE_PTR__;
void sync(void)
{
/*
* Walk the one used initially by RTEMS.
*/
_fwalk(_global_impure_ptr, sync_wrapper);
/*
* XXX Do we walk the one used globally by newlib?
* XXX Do we need the RTEMS global one?
*/
/*
* Now walk all the per-thread reentrancy structures.
*/
rtems_iterate_over_all_threads(sync_per_thread);
}
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