| /* |
| * Copyright 2010 Google Inc. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| // Author: jmaessen@google.com (Jan Maessen) |
| |
| #ifndef PAGESPEED_KERNEL_UTIL_WORK_BOUND_H_ |
| #define PAGESPEED_KERNEL_UTIL_WORK_BOUND_H_ |
| |
| namespace net_instaweb { |
| |
| // A WorkBound represents permission to do work bounded by some upper bound. |
| // Roughly speaking we can represent this as a bounded shared counter, but |
| // how we realize the counter implementation must vary from system to system. |
| class WorkBound { |
| public: |
| virtual ~WorkBound(); |
| virtual bool TryToWork() = 0; |
| virtual void WorkComplete() = 0; |
| }; |
| |
| } // namespace net_instaweb |
| |
| #endif // PAGESPEED_KERNEL_UTIL_WORK_BOUND_H_ |