8b9fcf354e
by many pthreads (tasks did not have this probablem because they have separate stdout streams). git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@174 42af7a65-404d-4744-a932-0658087f49c3
102 lines
3.7 KiB
C
102 lines
3.7 KiB
C
/************************************************************
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* lib_vfprintf.c
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*
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* Copyright (C) 2007 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name Gregory Nutt nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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************************************************************/
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/************************************************************
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* Included Files
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************************************************************/
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#include <sys/types.h>
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#include <stdio.h>
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#include <semaphore.h>
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#include "lib_internal.h"
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/************************************************************
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* Definitions
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************************************************************/
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/************************************************************
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* Private Type Declarations
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************************************************************/
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/************************************************************
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* Private Function Prototypes
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************************************************************/
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/************************************************************
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* Global Constant Data
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************************************************************/
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/************************************************************
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* Global Variables
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************************************************************/
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/************************************************************
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* Private Constant Data
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************************************************************/
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/************************************************************
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* Private Variables
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************************************************************/
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/************************************************************
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* Public Functions
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************************************************************/
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int vfprintf(FILE *stream, const char *fmt, va_list ap)
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{
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struct lib_stdstream_s stdstream;
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int n = ERROR;
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if (stream)
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{
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/* Wrap the stream in a stream object and let lib_vsprintf
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* do the work.
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*/
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lib_stdstream(&stdstream, stream);
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/* Hold the stream semaphore throughout the lib_vsprintf
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* call so that this thread can get its entire message out
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* before being pre-empted by the next thread.
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*/
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lib_take_semaphore(stream);
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n = lib_vsprintf(&stdstream.public, fmt, ap);
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lib_give_semaphore(stream);
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}
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return n;
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}
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