Library: File system utilities (OMVFS) Import: omvfs.xmd

Declaration

export external function unlock
                value file file-ref
        id      value integer lock-id optional

Argument definitions

file-ref

The vfs.file object associated with the file to be unlocked.

lock-id

The identifier returned by vfs.lock.

You can use vfs.unlock to unlock a file or a section of a file that was locked using vfs.lock.

This program shows a lock being set and then removed.

    import "omvfs.xmd" prefixed by vfs.
  
    process
       local vfs.file test-file
       local integer test-lock
       set test-file to vfs.open "test.txt"
       vfs.lock test-file
        from vfs.start-offset to 800
        id test-lock
  
        ;process the file
  
       vfs.unlock test-file
       id test-lock

If you have locked multiple sections of a file, you can use the lock identifier to specify the section to unlock. If the lock identifier is not specified, all the locks on the file will be released.

Exceptions

The following exceptions may occur:

• VFS200 The vfsFile object must be opened before it can be used
• VFS218 An invalid lock ID was specified
• VFS300 Generic operating system error

Related Topics vfs.open vfs.lock vfs.file

Other Library Functions vfs.change-directory vfs.change-owner vfs.change-permissions vfs.close vfs.connect vfs.connect-directory vfs.copy vfs.cursor-position vfs.default-certificates-file vfs.delete-directory vfs.delete-file vfs.describe vfs.describe-file vfs.directory vfs.directory-name vfs.disconnect vfs.file vfs.file-directory vfs.file-name vfs.link vfs.list vfs.lock vfs.make-directory vfs.move vfs.move-cursor vfs.omvfs-version vfs.open vfs.open-file-system vfs.open-ftp vfs.open-http vfs.open-https vfs.reader vfs.set-default-certificates-file vfs.truncate vfs.unlock vfs.writer

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