cc/resources/texture_mailbox_deleter.h

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CC_RESOURCES_TEXTURE_MAILBOX_DELETER_H_
   6 #define CC_RESOURCES_TEXTURE_MAILBOX_DELETER_H_
   7
   8 #include "base/memory/weak_ptr.h"
   9 #include "cc/base/cc_export.h"
  10 #include "cc/base/scoped_ptr_vector.h"
  11
  12 namespace base {
  13 class SingleThreadTaskRunner;
  14 }
  15
  16 namespace cc {
  17 class ContextProvider;
  18 class SingleReleaseCallback;
  19
  20 class CC_EXPORT TextureMailboxDeleter {
  21  public:
  22   explicit TextureMailboxDeleter(
  23       const scoped_refptr<base::SingleThreadTaskRunner>& task_runner);
  24   ~TextureMailboxDeleter();
  25
  26   // Returns a Callback that can be used as the ReleaseCallback for a
  27   // TextureMailbox attached to the |texture_id|. The ReleaseCallback can
  28   // be passed to other threads and will destroy the texture, once it is
  29   // run, on the impl thread. If the TextureMailboxDeleter is destroyed
  30   // due to the compositor shutting down, then the ReleaseCallback will
  31   // become a no-op and the texture will be deleted immediately on the
  32   // impl thread, along with dropping the reference to the ContextProvider.
  33   scoped_ptr<SingleReleaseCallback> GetReleaseCallback(
  34       const scoped_refptr<ContextProvider>& context_provider,
  35       unsigned texture_id);
  36
  37  private:
  38   // Runs the |impl_callback| to delete the texture and removes the callback
  39   // from the |impl_callbacks_| list.
  40   void RunDeleteTextureOnImplThread(SingleReleaseCallback* impl_callback,
  41                                     uint32 sync_point,
  42                                     bool is_lost);
  43
  44   scoped_refptr<base::SingleThreadTaskRunner> impl_task_runner_;
  45   ScopedPtrVector<SingleReleaseCallback> impl_callbacks_;
  46   base::WeakPtrFactory<TextureMailboxDeleter> weak_ptr_factory_;
  47 };
  48
  49 }  // namespace cc
  50
  51 #endif  // CC_RESOURCES_TEXTURE_MAILBOX_DELETER_H_