content/child/quota_message_filter.cc

   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 #include "content/child/quota_message_filter.h"
   6
   7 #include "content/child/quota_dispatcher.h"
   8 #include "content/common/quota_messages.h"
   9
  10 namespace content {
  11
  12 QuotaMessageFilter::QuotaMessageFilter(ThreadSafeSender* thread_safe_sender)
  13     : WorkerThreadMessageFilter(thread_safe_sender), next_request_id_(0) {
  14 }
  15
  16 QuotaMessageFilter::~QuotaMessageFilter() {}
  17
  18 int QuotaMessageFilter::GenerateRequestID(int thread_id) {
  19   base::AutoLock lock(request_id_map_lock_);
  20   request_id_map_[next_request_id_] = thread_id;
  21   return next_request_id_++;
  22 }
  23
  24 void QuotaMessageFilter::ClearThreadRequests(int thread_id) {
  25   base::AutoLock lock(request_id_map_lock_);
  26   for (RequestIdToThreadId::iterator iter = request_id_map_.begin();
  27        iter != request_id_map_.end();) {
  28     if (iter->second == thread_id)
  29       request_id_map_.erase(iter++);
  30     else
  31       iter++;
  32   }
  33 }
  34
  35 bool QuotaMessageFilter::ShouldHandleMessage(const IPC::Message& msg) const {
  36   return IPC_MESSAGE_CLASS(msg) == QuotaMsgStart;
  37 }
  38
  39 void QuotaMessageFilter::OnFilteredMessageReceived(const IPC::Message& msg) {
  40   QuotaDispatcher::ThreadSpecificInstance(thread_safe_sender(), this)
  41       ->OnMessageReceived(msg);
  42 }
  43
  44 bool QuotaMessageFilter::GetWorkerThreadIdForMessage(const IPC::Message& msg,
  45                                                      int* ipc_thread_id) {
  46   int request_id = -1;
  47   const bool success = base::PickleIterator(msg).ReadInt(&request_id);
  48   DCHECK(success);
  49
  50   base::AutoLock lock(request_id_map_lock_);
  51   RequestIdToThreadId::iterator found = request_id_map_.find(request_id);
  52   if (found != request_id_map_.end()) {
  53     *ipc_thread_id = found->second;
  54     request_id_map_.erase(found);
  55     return true;
  56   }
  57   return false;
  58 }
  59
  60 }  // namespace content