text: /*
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF licenses this file
   * to you 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.
   */
  
  
  #include "pagespeed/kernel/base/mock_timer.h"
  
  #include "pagespeed/kernel/base/abstract_mutex.h"
  #include "pagespeed/kernel/base/basictypes.h"
  #include "pagespeed/kernel/base/scoped_ptr.h"
  #include "pagespeed/kernel/base/function.h"
  
  namespace net_instaweb {
  
  const int64 MockTimer::kApr_5_2010_ms = 1270493486000LL;
  
  MockTimer::MockTimer(AbstractMutex* mutex, int64 time_ms)
      : time_us_(1000 * time_ms),
        mutex_(mutex),
        next_delta_(0) {
  }
  
  MockTimer::~MockTimer() {
    while (next_delta_ < deltas_us_.size()) {
      TimeAndCallback time_and_callback = deltas_us_[next_delta_++];
      if (time_and_callback.callback) {
        time_and_callback.callback->CallCancel();
      }
    }
  }
  
  void MockTimer::SetTimeUs(int64 new_time_us) {
    mutex_->Lock();
  
    // If an Alarm::Run function moved us forward in time, don't move us back.
    if (time_us_ < new_time_us) {
      time_us_ = new_time_us;
    }
    mutex_->Unlock();
  }
  
  void MockTimer::SetTimeDeltaUsWithCallback(int64 delta_us,
                                             Function* callback) {
    TimeAndCallback time_and_callback;
    time_and_callback.time = delta_us;
    time_and_callback.callback = callback;
    {
      ScopedMutex lock(mutex_.get());
      deltas_us_.push_back(time_and_callback);
    }
  }
  
  int64 MockTimer::NowUs() const {
    ScopedMutex lock(mutex_.get());
    if (next_delta_ < deltas_us_.size()) {
      TimeAndCallback time_and_callback = deltas_us_[next_delta_++];
      if (time_and_callback.callback) {
        time_and_callback.callback->CallRun();
      }
      const_cast<MockTimer*>(this)->AdvanceUs(time_and_callback.time);
    }
    return time_us_;
  }
  
  }  // namespace net_instaweb
  