Asynchronous initialization in Simple Index.

net/disk_cache/simple/simple_disk_format.cc

Index: net/disk_cache/simple/simple_disk_format.cc
diff --git a/net/disk_cache/simple/simple_disk_format.cc b/net/disk_cache/simple/simple_disk_format.cc
index 0a254dd30a38ce311bef5ef9d9c6dc9f4bf4b4c1..d9379a6f5a8c161cb9814f784ea3c0128ede222e 100644
--- a/net/disk_cache/simple/simple_disk_format.cc
+++ b/net/disk_cache/simple/simple_disk_format.cc
@@ -71,6 +71,15 @@ void EntryMetadata::DeSerialize(const char* in_buffer,
   memcpy(out_entry_metadata, in_buffer, kEntryMetadataSize);
 }
 
+// static
+void EntryMetadata::Merge(const EntryMetadata& entry_metadata,
+                          EntryMetadata* out_entry_metadata) {
+  if (out_entry_metadata->last_used_time == 0)
+    out_entry_metadata->last_used_time = entry_metadata.last_used_time;
+  if (out_entry_metadata->entry_size == 0)

[gavinp, 2013/04/10 10:51:56]

So 0 is both an invalid size, and the size of a 0 length datum?

[felipeg, 2013/04/10 14:21:45]

You said there should never be a valid entry with a 0 lenght datum

Since the size also includes the header, metadata, etc...

+    out_entry_metadata->entry_size = entry_metadata.entry_size;
+}
+
 }  // namespace SimpleIndexFile
 
 }  // namespace disk_cache