Changeset 317 for trunk/kernel/vfs/vfs.h

Timestamp:

Aug 4, 2017, 2:03:44 PM (6 years ago)

Author:

alain

Message:

1) Introduce the TSAR hal_cpu_context_switch() function.
2) Introduce the generic vfs_kernel_move() function.

File:

• trunk/kernel/vfs/vfs.h (modified) (3 diffs)

trunk/kernel/vfs/vfs.h

@@ -735 +735 @@
  * <file_xp> argument, and a - possibly distributed - user space <buffer>, taken into 
  * account the offset in <file_xp>. The transfer direction is defined by <to_buffer>.
- * This function is called by the sys_read() and sys_write() system calls.
+ * This function is called by the elf_load_process() function.
  ******************************************************************************************
  * @ to_buffer : mapper -> buffer if true / buffer -> mapper if false. 
@@ -741 +741 @@
  * @ buffer    : user space pointer on buffer (can be physically distributed).
  * @ size      : requested number of bytes from offset.
- * @ returns number of bytes actually transfered / -1 if error.
+ * @ returns 0 f success / -1 if error.
  *****************************************************************************************/
 error_t vfs_user_move( bool_t   to_buffer,
@@ -747 +747 @@
                        void   * buffer,
                        uint32_t size );
+
+/****************************************************************************************** 
+ * This function moves <size> bytes between a remote file mapper, identified by the 
+ * <file_xp> argument, and a - possibly remote - kernel <buffer_xp>, taken into 
+ * account the offset in <file_xp>. The transfer direction is defined by <to_buffer>.
+ * This function is called by the  system calls.
+ ******************************************************************************************
+ * @ to_buffer : mapper -> buffer if true / buffer -> mapper if false. 
+ * @ file_xp   : extended pointer on the remote file descriptor.
+ * @ buffer_xp : user space pointer on buffer (can be physically distributed).
+ * @ size      : requested number of bytes from offset.
+ * @ returns number of bytes actually transfered / -1 if error.
+ *****************************************************************************************/
+error_t vfs_kernel_move( bool_t   to_buffer,
+                         xptr_t   file_xp, 
+                         xptr_t   buffer_xp,
+                         uint32_t size );
 
 /******************************************************************************************