Changes between Version 54 and Version 55 of file_system

Timestamp:

Feb 4, 2016, 12:13:57 PM (10 years ago)

Author:

alain

Comment:

--

file_system

@@ -189 +189 @@
 This function returns in the <desc> argument a pointer on a buffer descriptor contained in a File_Cache, handling the possible miss.
 The searched file or directory is identified by the <inode> argument. The <cluster_id> argument is the buffer index in the File-Cache. The <writable> argument define the behaviour in case of miss in the File-Cache:
- * if [all clusters (from 0 to cluster_id) are already allocated in FAT] it scan the FAT to find the cluster index on device, and load the missing cluster in the File-Cache, marked as dirty if writable is set.
- * if [writable and all clusters (from 0 to cluster_id) are not allocated], it allocates in FAT the required cluster, it updates the size attribute (for a file), or the is_dir attribute (for a directory), and load the missing cluster in the File-Cache, marked as dirty.
- * if [not writable and all clusters (from 0 to cluster_id) are not allocated] it returns an error.
+ * if [cluster_id already allocated in FAT] it scan the FAT to find the cluster index on device, and load the missing cluster in the File-Cache, marked as dirty if writable is set.
+ * if [writable and cluster_id not allocated in FAT], it allocates in FAT the required cluster, it updates the size attribute (for a file), or the is_dir attribute (for a directory), and load the missing cluster in the File-Cache, marked as dirty.
+ * if [not writable and cluster_id not allocated in FAT] it returns an error.
 This function is called by various FAT functions to access a file or a directory, but is also called by the _sys_fat_mmap() function.
 It does not take the FAT lock, that must be taken by the caller.