/*
 * $Id: stdio_fflush.c,v 1.11 2006-01-08 12:04:24 obarthel Exp $
 *
 * :ts=4
 *
 * Portable ISO 'C' (1994) runtime library for the Amiga computer
 * Copyright (c) 2002-2015 by Olaf Barthel <obarthel (at) gmx.net>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *   - Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *
 *   - Neither the name of Olaf Barthel nor the names of contributors
 *     may be used to endorse or promote products derived from this
 *     software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef _STDLIB_NULL_POINTER_CHECK_H
#include "stdlib_null_pointer_check.h"
#endif /* _STDLIB_NULL_POINTER_CHECK_H */

/****************************************************************************/

#ifndef _STDIO_HEADERS_H
#include "stdio_headers.h"
#endif /* _STDIO_HEADERS_H */

/****************************************************************************/

int
fflush(FILE *stream)
{
	int result = EOF;

	ENTER();

	SHOWPOINTER(stream);

	if(__check_abort_enabled)
		__check_abort();

	/* Flush a particular stream? */
	if(stream != NULL)
	{
		struct iob * file = (struct iob *)stream;

		assert( __is_valid_iob(file) );

		flockfile(stream);

		if(__iob_write_buffer_is_valid(file) && __flush_iob_write_buffer(file) < 0)
			goto out;
	}
	else
	{
		int failed_iob = -1;
		int i;

		__stdio_lock();

		/* Flush all streams which still have unwritten data in the buffer. */
		for(i = 0 ; i < __num_iob ; i++)
		{
			if(__iob[i] != NULL &&
			   FLAG_IS_SET(__iob[i]->iob_Flags,IOBF_IN_USE) &&
			   FLAG_IS_SET(__iob[i]->iob_Flags,IOBF_WRITE) &&
			   __iob_write_buffer_is_valid(__iob[i]))
			{
				if(__flush_iob_write_buffer(__iob[i]) < 0)
				{
					failed_iob = i;
					break;
				}
			}
		}

		__stdio_unlock();

		if(failed_iob >= 0)
			goto out;
	}

	result = OK;

 out:

	if(stream != NULL)
		funlockfile(stream);

	RETURN(result);
	return(result);
}