diff options
Diffstat (limited to 'nuttx/lib/stdio/lib_fflush.c')
-rw-r--r-- | nuttx/lib/stdio/lib_fflush.c | 118 |
1 files changed, 118 insertions, 0 deletions
diff --git a/nuttx/lib/stdio/lib_fflush.c b/nuttx/lib/stdio/lib_fflush.c new file mode 100644 index 000000000..e0278d0d2 --- /dev/null +++ b/nuttx/lib/stdio/lib_fflush.c @@ -0,0 +1,118 @@ +/**************************************************************************** + * lib/stdio/lib_fflush.c + * + * Copyright (C) 2007-2009, 2011 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its 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. + * + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/config.h> + +#include <stdbool.h> +#include <stdio.h> +#include <fcntl.h> +#include <errno.h> + +#include <nuttx/fs/fs.h> + +#include "lib_internal.h" + +/**************************************************************************** + * Pre-processor Definitions + ****************************************************************************/ + +/**************************************************************************** + * Private Type Declarations + ****************************************************************************/ + +/**************************************************************************** + * Private Function Prototypes + ****************************************************************************/ + +/**************************************************************************** + * Global Constant Data + ****************************************************************************/ + +/**************************************************************************** + * Global Variables + ****************************************************************************/ + +/**************************************************************************** + * Private Constant Data + ****************************************************************************/ + +/**************************************************************************** + * Private Variables + ****************************************************************************/ + +/**************************************************************************** + * Global Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: fflush + * + * Description: + * The function fflush() forces a write of all user-space buffered data for + * the given output or update stream via the stream's underlying write + * function. The open status of the stream is unaffected. + * + * If the stream argument is NULL, fflush() flushes all open output streams. + * + * Return: + * OK on success EOF on failure (with errno set appropriately) + * + ****************************************************************************/ + +int fflush(FAR FILE *stream) +{ + /* Is the stream argument NULL? */ + + if (!stream) + { + /* Yes... then this is a request to flush all streams */ + + return lib_flushall(sched_getstreams()); + } + else if (lib_fflush(stream, true) != 0) + { + /* An error occurred during the flush AND/OR we were unable to flush all + * of the buffered write data. Return EOF on failure. + */ + + return EOF; + } + return OK; +} + |