[SyncFS] Introduce CallbackTracker to handle callback abortion

chrome/browser/sync_file_system/drive_backend/callback_tracker_internal.h

+// This file was GENERATED by command:
+//     pump.py callback_tracker_internal.h.pump
+// DO NOT EDIT BY HAND!!!
+
+
+// Copyright 2014 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 CHROME_BROWSER_SYNC_FILE_SYSTEM_DRIVE_BACKEND_CALLBACK_TRACKER_INTERNAL_H_
+#define CHROME_BROWSER_SYNC_FILE_SYSTEM_DRIVE_BACKEND_CALLBACK_TRACKER_INTERNAL_H_
+
+#include "base/callback.h"
+#include "base/callback_internal.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/memory/weak_ptr.h"
+
+namespace sync_file_system {
+namespace drive_backend {
+
+class CallbackTracker;
+
+namespace internal {
+
+class AbortHelper {
+ public:
+  explicit AbortHelper(CallbackTracker* tracker);
+  ~AbortHelper();
+  base::WeakPtr<AbortHelper> AsWeakPtr();
+
+  static scoped_ptr<AbortHelper> TakeOwnership(
+      const base::WeakPtr<AbortHelper>& abort_helper);
+
+ private:
+  CallbackTracker* tracker_;  // Not owned.
+  base::WeakPtrFactory<AbortHelper> weak_ptr_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(AbortHelper);
+};
+
+template <typename>
+struct InvokeAndInvalidateHelper;
+
+template <>
+struct InvokeAndInvalidateHelper<void()> {
+  static void Run(const base::WeakPtr<AbortHelper>& abort_helper,
+                  const base::Callback<void()>& callback) {
+    scoped_ptr<AbortHelper> deleter = AbortHelper::TakeOwnership(abort_helper);
+    if (deleter) {
+      callback.Run();
+    }
+  }
+};
+
+template <typename A1>
+struct InvokeAndInvalidateHelper<void(A1)> {
+  static void Run(const base::WeakPtr<AbortHelper>& abort_helper,
+                  const base::Callback<void(A1)>& callback, A1 a1) {
+    scoped_ptr<AbortHelper> deleter = AbortHelper::TakeOwnership(abort_helper);
+    if (deleter) {
+      callback.Run(base::internal::CallbackForward(a1));
+    }
+  }
+};
+
+template <typename A1, typename A2>
+struct InvokeAndInvalidateHelper<void(A1, A2)> {
+  static void Run(const base::WeakPtr<AbortHelper>& abort_helper,
+                  const base::Callback<void(A1, A2)>& callback, A1 a1, A2 a2) {
+    scoped_ptr<AbortHelper> deleter = AbortHelper::TakeOwnership(abort_helper);
+    if (deleter) {
+      callback.Run(base::internal::CallbackForward(a1),
+          base::internal::CallbackForward(a2));
+    }
+  }
+};
+
+template <typename A1, typename A2, typename A3>
+struct InvokeAndInvalidateHelper<void(A1, A2, A3)> {
+  static void Run(const base::WeakPtr<AbortHelper>& abort_helper,
+                  const base::Callback<void(A1, A2, A3)>& callback, A1 a1,
+                      A2 a2, A3 a3) {
+    scoped_ptr<AbortHelper> deleter = AbortHelper::TakeOwnership(abort_helper);
+    if (deleter) {
+      callback.Run(base::internal::CallbackForward(a1),
+          base::internal::CallbackForward(a2),
+          base::internal::CallbackForward(a3));
+    }
+  }
+};
+
+template <typename A1, typename A2, typename A3, typename A4>
+struct InvokeAndInvalidateHelper<void(A1, A2, A3, A4)> {
+  static void Run(const base::WeakPtr<AbortHelper>& abort_helper,
+                  const base::Callback<void(A1, A2, A3, A4)>& callback, A1 a1,
+                      A2 a2, A3 a3, A4 a4) {
+    scoped_ptr<AbortHelper> deleter = AbortHelper::TakeOwnership(abort_helper);
+    if (deleter) {
+      callback.Run(base::internal::CallbackForward(a1),
+          base::internal::CallbackForward(a2),
+          base::internal::CallbackForward(a3),
+          base::internal::CallbackForward(a4));
+    }
+  }
+};
+
+template <typename A1, typename A2, typename A3, typename A4, typename A5>
+struct InvokeAndInvalidateHelper<void(A1, A2, A3, A4, A5)> {
+  static void Run(const base::WeakPtr<AbortHelper>& abort_helper,
+                  const base::Callback<void(A1, A2, A3, A4, A5)>& callback,
+                      A1 a1, A2 a2, A3 a3, A4 a4, A5 a5) {
+    scoped_ptr<AbortHelper> deleter = AbortHelper::TakeOwnership(abort_helper);
+    if (deleter) {
+      callback.Run(base::internal::CallbackForward(a1),
+          base::internal::CallbackForward(a2),
+          base::internal::CallbackForward(a3),
+          base::internal::CallbackForward(a4),
+          base::internal::CallbackForward(a5));
+    }
+  }
+};
+
+template <typename A1, typename A2, typename A3, typename A4, typename A5,
+    typename A6>
+struct InvokeAndInvalidateHelper<void(A1, A2, A3, A4, A5, A6)> {
+  static void Run(const base::WeakPtr<AbortHelper>& abort_helper,
+                  const base::Callback<void(A1, A2, A3, A4, A5, A6)>& callback,
+                      A1 a1, A2 a2, A3 a3, A4 a4, A5 a5, A6 a6) {
+    scoped_ptr<AbortHelper> deleter = AbortHelper::TakeOwnership(abort_helper);
+    if (deleter) {
+      callback.Run(base::internal::CallbackForward(a1),
+          base::internal::CallbackForward(a2),
+          base::internal::CallbackForward(a3),
+          base::internal::CallbackForward(a4),
+          base::internal::CallbackForward(a5),
+          base::internal::CallbackForward(a6));
+    }
+  }
+};
+
+template <typename A1, typename A2, typename A3, typename A4, typename A5,
+    typename A6, typename A7>
+struct InvokeAndInvalidateHelper<void(A1, A2, A3, A4, A5, A6, A7)> {
+  static void Run(const base::WeakPtr<AbortHelper>& abort_helper,
+                  const base::Callback<void(A1, A2, A3, A4, A5, A6,
+                      A7)>& callback, A1 a1, A2 a2, A3 a3, A4 a4, A5 a5, A6 a6,
+                      A7 a7) {
+    scoped_ptr<AbortHelper> deleter = AbortHelper::TakeOwnership(abort_helper);
+    if (deleter) {
+      callback.Run(base::internal::CallbackForward(a1),
+          base::internal::CallbackForward(a2),
+          base::internal::CallbackForward(a3),
+          base::internal::CallbackForward(a4),
+          base::internal::CallbackForward(a5),
+          base::internal::CallbackForward(a6),
+          base::internal::CallbackForward(a7));
+    }
+  }
+};
+
+}  // namespace internal
+}  // namespace drive_backend
+}  // namespace sync_file_system
+
+#endif  // CHROME_BROWSER_SYNC_FILE_SYSTEM_DRIVE_BACKEND_CALLBACK_TRACKER_INTERNAL_H_