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Diffstat (limited to 'nuttx/libc/stdio/lib_vfprintf.c')
-rw-r--r-- | nuttx/libc/stdio/lib_vfprintf.c | 102 |
1 files changed, 102 insertions, 0 deletions
diff --git a/nuttx/libc/stdio/lib_vfprintf.c b/nuttx/libc/stdio/lib_vfprintf.c new file mode 100644 index 000000000..cd117ddc3 --- /dev/null +++ b/nuttx/libc/stdio/lib_vfprintf.c @@ -0,0 +1,102 @@ +/**************************************************************************** + * libc/stdio/lib_vfprintf.c + * + * Copyright (C) 2007-2009, 2011 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <gnutt@nuttx.org> + * + * 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 <stdio.h> +#include <semaphore.h> + +#include "lib_internal.h" + +/**************************************************************************** + * Pre-processor Definitions + ****************************************************************************/ + +/**************************************************************************** + * Private Type Declarations + ****************************************************************************/ + +/**************************************************************************** + * Private Function Prototypes + ****************************************************************************/ + +/**************************************************************************** + * Global Constant Data + ****************************************************************************/ + +/**************************************************************************** + * Global Variables + ****************************************************************************/ + +/**************************************************************************** + * Private Constant Data + ****************************************************************************/ + +/**************************************************************************** + * Private Variables + ****************************************************************************/ + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +int vfprintf(FAR FILE *stream, FAR const char *fmt, va_list ap) +{ + struct lib_stdoutstream_s stdoutstream; + int n = ERROR; + + if (stream) + { + /* Wrap the stream in a stream object and let lib_vsprintf + * do the work. + */ + + lib_stdoutstream(&stdoutstream, stream); + + /* Hold the stream semaphore throughout the lib_vsprintf + * call so that this thread can get its entire message out + * before being pre-empted by the next thread. + */ + + lib_take_semaphore(stream); + n = lib_vsprintf(&stdoutstream.public, fmt, ap); + lib_give_semaphore(stream); + } + return n; +} |