89 lines
2.4 KiB
C
89 lines
2.4 KiB
C
/*
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+------------------------------------------------------------------------------
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| Project : Device Filesystem
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+------------------------------------------------------------------------------
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| Copyright 2004, 2005 www.fayfayspace.org.
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| All rights reserved.
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|------------------------------------------------------------------------------
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| File : dfs.c, the implementation of Device FileSystem
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|------------------------------------------------------------------------------
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| Chang Logs:
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| Date Author Notes
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| 2002-12-31 ffxz The first version.
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| 2005-01-22 ffxz Clean up the code.
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+------------------------------------------------------------------------------
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*/
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#include <dfs_def.h>
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#include <dfs_config.h>
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#include <dfs_fs.h>
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#include <dfs_raw.h>
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#include <string.h>
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/* Global variables */
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struct dfs_filesystem_operation* filesystem_operation_table[DFS_FILESYSTEM_TYPES_MAX + 1];
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struct dfs_filesystem filesystem_table[DFS_FILESYSTEMS_MAX + 1];
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/* device filesystem lock */
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struct rt_mutex dlock;
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#ifdef DFS_USING_WORKDIR
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char working_directory[DFS_PATH_MAX + 1];
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#endif
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#ifdef DFS_USING_STDIO
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struct dfs_fd fd_table[3 + DFS_FD_MAX];
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#else
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struct dfs_fd fd_table[DFS_FD_MAX];
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#endif
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/*
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+------------------------------------------------------------------------------
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| Function : dfs_init
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+------------------------------------------------------------------------------
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| Description : Inits the Device Filesystem
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| Parameters : null
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| Returns : null
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+------------------------------------------------------------------------------
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*/
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void dfs_init()
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{
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int index;
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/* clear filesystem operations table */
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for (index = 0; index < DFS_FILESYSTEM_TYPES_MAX + 1; index++)
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filesystem_operation_table[index] = RT_NULL;
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/* create device filesystem lock */
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rt_mutex_init(&dlock, "dlock", RT_IPC_FLAG_FIFO);
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/* clear filesystem table */
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rt_memset(filesystem_table, 0, sizeof(filesystem_table));
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#ifdef DFS_USING_WORKDIR
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/* set current working directory */
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strcpy(working_directory, "/");
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#endif
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/* clean fd table */
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rt_memset(fd_table, 0, sizeof(fd_table));
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#if defined(RT_USING_FINSH) && !defined(FINSH_USING_SYMTAB)
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dfs_export_finsh();
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#endif
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}
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void dfs_lock()
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{
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rt_err_t result;
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result = rt_mutex_take(&dlock, RT_WAITING_FOREVER);
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RT_ASSERT(result == RT_EOK);
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}
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void dfs_unlock()
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{
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rt_mutex_release(&dlock);
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}
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