ipc/ipc_forwarding_message_filter.cc

   1 // Copyright (c) 2012 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 "ipc/ipc_forwarding_message_filter.h"
   6
   7 #include "base/bind.h"
   8 #include "base/location.h"
   9 #include "ipc/ipc_message.h"
  10
  11 namespace IPC {
  12
  13 ForwardingMessageFilter::ForwardingMessageFilter(
  14     const uint32* message_ids_to_filter,
  15     size_t num_message_ids_to_filter,
  16     base::TaskRunner* target_task_runner)
  17     : target_task_runner_(target_task_runner) {
  18   DCHECK(target_task_runner_.get());
  19   for (size_t i = 0; i < num_message_ids_to_filter; i++)
  20     message_ids_to_filter_.insert(message_ids_to_filter[i]);
  21 }
  22
  23 void ForwardingMessageFilter::AddRoute(int routing_id, const Handler& handler) {
  24   DCHECK(!handler.is_null());
  25   base::AutoLock locked(handlers_lock_);
  26   handlers_.insert(std::make_pair(routing_id, handler));
  27 }
  28
  29 void ForwardingMessageFilter::RemoveRoute(int routing_id) {
  30   base::AutoLock locked(handlers_lock_);
  31   handlers_.erase(routing_id);
  32 }
  33
  34 bool ForwardingMessageFilter::OnMessageReceived(const Message& message) {
  35   if (message_ids_to_filter_.find(message.type()) ==
  36       message_ids_to_filter_.end())
  37     return false;
  38
  39
  40   Handler handler;
  41
  42   {
  43     base::AutoLock locked(handlers_lock_);
  44     std::map<int, Handler>::iterator it = handlers_.find(message.routing_id());
  45     if (it == handlers_.end())
  46       return false;
  47     handler = it->second;
  48   }
  49
  50   target_task_runner_->PostTask(FROM_HERE, base::Bind(handler, message));
  51   return true;
  52 }
  53
  54 ForwardingMessageFilter::~ForwardingMessageFilter() {
  55 }
  56
  57 }  // namespace IPC