Disk cache: Prevent obscure file corruption and deal...

net/disk_cache/disk_cache_test_base.cc

 // Copyright (c) 2006-2010 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.
 
 #include "net/disk_cache/disk_cache_test_base.h"
 
 #include "net/base/io_buffer.h"
 #include "net/base/net_errors.h"
 #include "net/base/test_completion_callback.h"
 #include "net/disk_cache/backend_impl.h"
@@ skipping 218 matching lines @@
   return cb.GetResult(rv);
 }
 
 int DiskCacheTestWithCache::WriteSparseData(disk_cache::Entry* entry,
                                             int64 offset,
                                             net::IOBuffer* buf, int len) {
   TestCompletionCallback cb;
   int rv = entry->WriteSparseData(offset, buf, len, &cb);
   return cb.GetResult(rv);
 }
+
+// Simple task to run part of a test from the cache thread.
+class TrimTask : public Task {
+ public:
+  TrimTask(disk_cache::BackendImpl* backend, bool deleted, bool empty)
+      : backend_(backend),
+        deleted_(deleted),
+        empty_(empty) {}
+
+  virtual void Run() {
+    if (deleted_)
+      backend_->TrimDeletedListForTest(empty_);
+    else
+      backend_->TrimForTest(empty_);
+  }
+
+ protected:
+  disk_cache::BackendImpl* backend_;
+  bool deleted_;
+  bool empty_;
+};
+
+void DiskCacheTestWithCache::TrimForTest(bool empty) {
+  RunTaskForTest(new TrimTask(cache_impl_, false, empty));
+}
+
+void DiskCacheTestWithCache::TrimDeletedListForTest(bool empty) {
+  RunTaskForTest(new TrimTask(cache_impl_, true, empty));
+}