tree 1a873a5b5671d2600ed5c1b579b94452b7a5593b
parent 4c7e100910cb1b40fc3aed0a21abe0806645c02a
author Shawn O. Pearce <spearce@spearce.org> 1287086814 -0700
committer Shawn O. Pearce <spearce@spearce.org> 1288193851 -0700

Call ProgressMonitor.update() from main thread

Don't permit transient worker threads to access the underlying output
stream of a ProgressMonitor, as they might get marked as the stream's
writer thread.  Instead proxy update events from the workers back onto
the application's real work thread.  This ensures that the stream only
sees a single thread, and its the thread that will remain alive for
the entire life cycle of the operation.

This fixes IOException("Write end dead") during local repository fetch
when threaded delta search is enabled.  One of the transient delta
search threads became the designated writer for the pipe, and when it
terminated the reader end thought the writer was dead, even though the
main writer thread was still executing in PackWriter.

Bug: 326557
Change-Id: I01d1b20a3d7be1c0b480c7fb5c9773c161fe5c15
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>