93 lines
2.8 KiB
C
93 lines
2.8 KiB
C
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/*
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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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rt_sem_t filesystem_table_lock;
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rt_sem_t filesystem_operation_table_lock;
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#ifdef RT_USING_WORKDIR
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char working_directory[DFS_PATH_MAX + 1];
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rt_sem_t working_directory_lock;
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#endif
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struct dfs_fd fd_table[DFS_FD_MAX + 1];
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rt_sem_t fd_table_lock;
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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 filesystem operations table lock */
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filesystem_operation_table_lock = rt_sem_create("sem_fot", 1, RT_IPC_FLAG_FIFO);
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/* clear filesystem table */
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for (index = 0; index < DFS_FILESYSTEMS_MAX + 1; index++)
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{
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rt_memset(filesystem_table[index].path, 0, DFS_PATH_MAX + 1);
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filesystem_table[index].ops = RT_NULL;
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filesystem_table[index].dev_id = 0;
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filesystem_table[index].block_id = 0;
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filesystem_table[index].data = RT_NULL;
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}
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/* create filesystem table lock */
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filesystem_table_lock = rt_sem_create("sem_fst", 1, RT_IPC_FLAG_FIFO);
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#ifdef RT_USING_WORKDIR
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/* set current working directory */
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strcpy(working_directory, "/");
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working_directory_lock = rt_sem_create("sem_wd", 1, RT_IPC_FLAG_FIFO);
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#endif
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/* clean fd table */
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for ( index = 0; index < DFS_FD_MAX; index ++)
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{
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rt_memset(&fd_table[index], 0, sizeof(struct dfs_fd));
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}
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/* create fd table lock */
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fd_table_lock = rt_sem_create("sem_fdt", 1, RT_IPC_FLAG_FIFO);
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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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