The appcache system uses two threads, an IO thread and a DB thread.

It does not create these threads, the embedder is responsible for
providing them to the appcache library by implementing the class
declared in appcache_thread.h.

Also in this CL are two implementations, one for Chrome and another for test_shell.

TEST=none
BUG=none

Review URL: http://codereview.chromium.org/409005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@32846 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 44 insertions, 0 deletions

diff --git a/webkit/appcache/appcache_thread.h b/webkit/appcache/appcache_thread.h
new file mode 100644
index 0000000..9f14b1c
--- /dev/null
+++ b/webkit/appcache/appcache_thread.h
@@ -0,0 +1,44 @@
+// Copyright (c) 2009 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef WEBKIT_APPCACHE_APPCACHE_THREAD_H_
+#define WEBKIT_APPCACHE_APPCACHE_THREAD_H_
+
+namespace tracked_objects {
+class Location;
+}
+class Task;
+
+namespace appcache {
+
+// The appcache system uses two threads, an IO thread and a DB thread.
+// It does not create these threads, the embedder is responsible for
+// providing them to the appcache library by providing a concrete
+// implementation of the PostTask and CurrentlyOn methods declared here,
+// and by calling the InitIDs method prior to using the appcache library.
+class AppCacheThread {
+ public:
+  static void InitIDs(int db, int io) {
+    db_ = db;
+    io_ = io;
+  }
+  static int db() { return db_; }
+  static int io() { return io_; }
+
+  static bool PostTask(int id,
+                       const tracked_objects::Location& from_here,
+                       Task* task);
+  static bool CurrentlyOn(int id);
+
+ private:
+  AppCacheThread();
+  ~AppCacheThread();
+
+  static int db_;
+  static int io_;
+};
+
+}  // namespace appcache
+
+#endif  // WEBKIT_APPCACHE_APPCACHE_THREAD_H_