********** WebCore blob hacking

WebCore/platform/network/BlobRegistryImpl.h

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 30 matching lines @@
 
 namespace WebCore {
 
 class KURL;
 class ResourceError;
 class ResourceHandle;
 class ResourceHandleClient;
 class ResourceRequest;
 class ResourceResponse;
 
-// BlobRegistryImpl is not thread-safe. It should only be called from main thread.
+#if PLATFORM(CHROMIUM)
+error error error
+#endif
+
 class BlobRegistryImpl : public BlobRegistry {
     WTF_MAKE_FAST_ALLOCATED;
 public:
     virtual ~BlobRegistryImpl() { }
 
-    virtual void registerBlobURL(const KURL&, PassOwnPtr<BlobData>);
-    virtual void registerBlobURL(const KURL&, const KURL& srcURL);
-    virtual void unregisterBlobURL(const KURL&);
-    virtual bool loadResourceSynchronously(const ResourceRequest&, ResourceError&, ResourceResponse&, Vector<char>& data);
+    // BlobData registration: may be called on any thread.
+    virtual void registerBlobData(const String& uuid, PassOwnPtr<BlobData>);
+    virtual void addBlobDataRef(const String& uuid);
+    virtual void removeBlobDataRef(const String& uuid);
 
+    // Public Blob URL registration: may be called on any thread.
+    virtual void registerPublicBlobURL(SecurityOrigin*, const KURL&, PassRefPtr<BlobDataHandle>);
+    virtual void revokePublicBlobURL(const KURL&);
+    virtual PassRefPtr<SecurityOrigin> cachedUniqueOrigin(const KURL&);
+
+    // Extra methods that are not defined in the base class to support BlobURL resource loading
+    // and Form uploads that include blobs as file input elements. In-process implementations need
+    // direct access to the underlying data for these functions, but not all ports need this.
+    // Chromium ports perform these functions out-of-process).
+    // TODO: fix up callsites that currently use FromURL that need to use FromUUID in other ports.
+    PassRefPtr<BlobStorageData> getBlobDataFromUUID(const String&) const;
     PassRefPtr<BlobStorageData> getBlobDataFromURL(const KURL&) const;
-
+    bool loadResourceSynchronously(const ResourceRequest&, ResourceError&, ResourceResponse&, Vector<char>& data);
     PassRefPtr<ResourceHandle> createResourceHandle(const ResourceRequest&, ResourceHandleClient*);
 
 private:
+    class URLRegistrationHelper;
+    typedef HashMap<String, RefPtr<BlobDataHandle> > BlobURLMap;
+    typedef HashMap<String, std::pair<int, RefPtr<BlobStorageData> > > BlobMap;
+
     bool shouldLoadResource(const ResourceRequest& request) const;
     void appendStorageItems(BlobStorageData*, const BlobDataItemList&);
     void appendStorageItems(BlobStorageData*, const BlobDataItemList&, long long offset, long long length);
 
-    HashMap<String, RefPtr<BlobStorageData> > m_blobs;
+    // The url map is only accessed on the main thread.
+    BlobURLMap m_publicURLs;
+
+    // The blob map is accessed on multiple threads, the mutex protects it from concurrent access.
+    mutable Mutex m_mutex;
+    BlobMap m_blobs;
 };
 
 } // namespace WebCore
 
 #endif // BlobRegistryImpl_h