155 lines
4.7 KiB
C
155 lines
4.7 KiB
C
/************************************************************
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* libc/misc/lib_init.c
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*
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* Copyright (C) 2007, 2011, 2013 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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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 NuttX 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 <nuttx/config.h>
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#include <stdio.h>
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#include <string.h>
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#include <errno.h>
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#include <nuttx/kmalloc.h>
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#include <nuttx/fs/fs.h>
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#include <nuttx/lib.h>
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#include "lib_internal.h"
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#if !defined(CONFIG_NUTTX_KERNEL) || defined(__KERNEL__)
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/************************************************************
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* Pre-processor Definitions
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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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* Private Functions
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************************************************************/
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/************************************************************
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* Public Functions
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************************************************************/
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/************************************************************
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* Name: lib_initialize
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************************************************************/
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/* General library initialization hook */
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void weak_const_function lib_initialize(void)
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{
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}
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/************************************************************
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* Name: lib_streaminit
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************************************************************/
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#if CONFIG_NFILE_STREAMS > 0
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/* The following function is called when a new task is allocated. It
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* initializees the streamlist instance that is stored in the task group.
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*/
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void lib_streaminit(FAR struct streamlist *list)
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{
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int i;
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/* Initialize the list access mutex */
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(void)sem_init(&list->sl_sem, 0, 1);
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/* Initialize each FILE structure */
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for (i = 0; i < CONFIG_NFILE_STREAMS; i++)
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{
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/* Clear the IOB */
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memset(&list->sl_streams[i], 0, sizeof(FILE));
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/* Indicate not opened */
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list->sl_streams[i].fs_fd = -1;
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/* Initialize the stream semaphore to one to support one-at-
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* a-time access to private data sets.
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*/
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lib_sem_initialize(&list->sl_streams[i]);
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}
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}
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/* this function is called when a TCB is destroyed. Note that is
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* does not close the file by release this inode. This happens
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* separately when the file descriptor list is freed.
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*/
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void lib_releaselist(FAR struct streamlist *list)
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{
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#if CONFIG_STDIO_BUFFER_SIZE > 0
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int i;
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#endif
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DEBUGASSERT(list);
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/* Destroy the semaphore and release the filelist */
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(void)sem_destroy(&list->sl_sem);
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/* Release each stream in the list */
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#if CONFIG_STDIO_BUFFER_SIZE > 0
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for (i = 0; i < CONFIG_NFILE_STREAMS; i++)
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{
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/* Destroy the semaphore that protects the IO buffer */
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(void)sem_destroy(&list->sl_streams[i].fs_sem);
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/* Release the IO buffer */
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if (list->sl_streams[i].fs_bufstart)
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{
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sched_ufree(list->sl_streams[i].fs_bufstart);
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}
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}
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#endif
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}
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#endif /* !CONFIG_NUTTX_KERNEL || __KERNEL__ */
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#endif /* CONFIG_NFILE_STREAMS */
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