Changeset 761 for soft/giet_vm/giet_fat32/fat32.h

Timestamp:

Jan 19, 2016, 11:34:45 AM (8 years ago)

Author:

alain

Message:

Replace the _get_buffer_from_cache() function by

• _get_file_cache_buffer() : external
• _get_fat_cache_buffer() : internal

File:

• soft/giet_vm/giet_fat32/fat32.h (modified) (5 diffs)

soft/giet_vm/giet_fat32/fat32.h

@@ -88 +88 @@
 #define DIR_WRT_DATE              24 ,  2   // date of last write
 #define DIR_FST_CLUS_LO           26 ,  2   // cluster index 16 LSB bit
-#define DIR_FILE_SIZE             28 ,  4   // file size (up to 4 giga bytes)
+#define DIR_FILE_SIZE             28 ,  4   // dir_entry size (up to 4 Gbytes)
 /*******************************************************************************/
 
@@ -126 +126 @@
 /*******************************************************************************/
 
-#define FAT_INITIALIZED         0xBABEF00D
-#define FAT_PADDR_MODE          0x00000001    // mask for physical address mode
-#define FAT_FORCED_OFFSET       0X00000002    // mask for forced offset mode
+#define FAT_INITIALIZED           0xBABEF00D
+#define FAT_PADDR_MODE            0x00000001  // mask for physical address mode
+#define FAT_FORCED_OFFSET         0X00000002  // mask for forced offset mode
 
 /********************************************************************************
@@ -168 +168 @@
     fat_cache_node_t*    cache;                  // pointer on the file_cache root
     unsigned int         cluster;                // first cluster index in FAT
-    unsigned int         size;                   // number of bytes (file only)
-    unsigned int         count;                  // number open if file / 0 if dir
+    unsigned int         size;                   // number of bytes
+    unsigned int         count;                  // reference count / 0 if dir
     unsigned short       dentry;                 // directory entry index in parent
     unsigned char        levels;                 // number of levels in file_cache
@@ -215 +215 @@
 
 
-/*********************** Extern Functions  *************************************/
+/*******************************************************************************
+                     Extern global variables
+*******************************************************************************/
+
+extern fat_desc_t     _fat; 
+
+/******************************************************************************* 
+                     Extern Functions
+*******************************************************************************/
 
 extern int _fat_init();         
@@ -263 +271 @@
                                unsigned int buffer_size );      // buffer size
 
-extern int _fat_buffer_from_cache( fat_inode_t*        inode,   // inode pointer
-                                   unsigned int        cluster, // cluster index
-                                   fat_cache_desc_t**  desc );  // buffer descriptor
-
-/*******************************************************************************/
-
-
+extern int _get_file_cache_buffer( fat_inode_t*    inode,       // inode pointer
+                                   unsigned int    cluster_id,  // cluster index
+                                   unsigned int     writable,   // writable mmap
+                                   fat_cache_desc_t** desc );   // buffer descriptor
 #endif