WebCore/ThreadableLoader.h

   1 /*
   2  * Copyright (c) 2009, Google Inc. All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions are
   6  * met:
   7  *
   8  *     * Redistributions of source code must retain the above copyright
   9  * notice, this list of conditions and the following disclaimer.
  10  *     * Redistributions in binary form must reproduce the above
  11  * copyright notice, this list of conditions and the following disclaimer
  12  * in the documentation and/or other materials provided with the
  13  * distribution.
  14  *     * Neither the name of Google Inc. nor the names of its
  15  * contributors may be used to endorse or promote products derived from
  16  * this software without specific prior written permission.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  21  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  22  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  23  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  24  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  28  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  29  */
  30
  31 #ifndef ThreadableLoader_h
  32 #define ThreadableLoader_h
  33
  34 #include <wtf/Noncopyable.h>
  35 #include <wtf/PassRefPtr.h>
  36 #include <wtf/Vector.h>
  37
  38 namespace WebCore {
  39
  40     class ResourceError;
  41     class ResourceRequest;
  42     class ResourceResponse;
  43     class ScriptExecutionContext;
  44     class ThreadableLoaderClient;
  45
  46     enum LoadCallbacks {
  47         SendLoadCallbacks,
  48         DoNotSendLoadCallbacks
  49     };
  50
  51     enum ContentSniff {
  52         SniffContent,
  53         DoNotSniffContent
  54     };
  55
  56     // Useful for doing loader operations from any thread (not threadsafe,
  57     // just able to run on threads other than the main thread).
  58     class ThreadableLoader : Noncopyable {
  59     public:
  60         static PassRefPtr<ThreadableLoader> create(ScriptExecutionContext*, ThreadableLoaderClient*, const ResourceRequest&, LoadCallbacks, ContentSniff);
  61         static unsigned long loadResourceSynchronously(ScriptExecutionContext*, const ResourceRequest&, ResourceError&, ResourceResponse&, Vector<char>& data);
  62
  63         virtual void cancel() = 0;
  64         void ref() { refThreadableLoader(); }
  65         void deref() { derefThreadableLoader(); }
  66
  67     protected:
  68         virtual ~ThreadableLoader() { }
  69         virtual void refThreadableLoader() = 0;
  70         virtual void derefThreadableLoader() = 0;
  71     };
  72
  73 } // namespace WebCore
  74
  75 #endif // ThreadableLoader_h