1    :  // Copyright 2014 Google Inc. All Rights Reserved.
   2    :  //
   3    :  // Licensed under the Apache License, Version 2.0 (the "License");
   4    :  // you may not use this file except in compliance with the License.
   5    :  // You may obtain a copy of the License at
   6    :  //
   7    :  //     http://www.apache.org/licenses/LICENSE-2.0
   8    :  //
   9    :  // Unless required by applicable law or agreed to in writing, software
  10    :  // distributed under the License is distributed on an "AS IS" BASIS,
  11    :  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12    :  // See the License for the specific language governing permissions and
  13    :  // limitations under the License.
  14    :  
  15    :  #include "syzygy/kasko/waitable_timer_impl.h"
  16    :  
  17    :  #include <windows.h>
  18    :  
  19    :  #include "base/time/time.h"
  20    :  #include "syzygy/common/com_utils.h"
  21    :  
  22  m :  namespace kasko {
  23    :  
  24    :  // static
  25  m :  std::unique_ptr<WaitableTimer> WaitableTimerImpl::Create(
  26  m :      const base::TimeDelta& interval) {
  27  m :    std::unique_ptr<WaitableTimer> result;
  28  m :    base::win::ScopedHandle handle(::CreateWaitableTimer(NULL, TRUE, NULL));
  29  m :    if (handle.IsValid())
  30  m :      result.reset(new WaitableTimerImpl(std::move(handle), interval));
  31  m :    return std::move(result);
  32  m :  }
  33    :  
  34  m :  WaitableTimerImpl::~WaitableTimerImpl() {}
  35    :  
  36  m :  void WaitableTimerImpl::Start() {
  37  m :    if (!::SetWaitableTimer(handle_.Get(), &interval_, 0, NULL, NULL, FALSE))
  38  m :      LOG(ERROR) << "Unexpected failure to set a timer: " << ::common::LogWe();
  39  m :  }
  40    :  
  41  m :  HANDLE WaitableTimerImpl::GetHANDLE() {
  42  m :    return handle_.Get();
  43  m :  }
  44    :  
  45  m :  WaitableTimerImpl::WaitableTimerImpl(base::win::ScopedHandle handle,
  46  m :                                       const base::TimeDelta& interval)
  47  m :      : handle_(handle.Take()), interval_() {
  48  m :    interval_.QuadPart = (-interval.InMicroseconds()) *
  49  m :                         (base::Time::kNanosecondsPerMicrosecond / 100);
  50  m :  }
  51    :  
  52  m :  }  // namespace kasko