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149 lines
4.4 KiB
149 lines
4.4 KiB
/************************************************************ |
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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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/************************************************************ |
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* 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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* 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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#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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* intializes 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_filedes = -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_free(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_NFILE_STREAMS */ |
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