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      1 /*
      2  * libjingle
      3  * Copyright 2004--2005, Google Inc.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions are met:
      7  *
      8  *  1. Redistributions of source code must retain the above copyright notice,
      9  *     this list of conditions and the following disclaimer.
     10  *  2. Redistributions in binary form must reproduce the above copyright notice,
     11  *     this list of conditions and the following disclaimer in the documentation
     12  *     and/or other materials provided with the distribution.
     13  *  3. The name of the author may not be used to endorse or promote products
     14  *     derived from this software without specific prior written permission.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
     17  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
     18  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
     19  * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     20  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     21  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
     22  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
     23  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
     24  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
     25  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     26  */
     27 
     28 #include "talk/p2p/client/socketmonitor.h"
     29 
     30 #include "talk/base/common.h"
     31 
     32 namespace cricket {
     33 
     34 enum {
     35   MSG_MONITOR_POLL,
     36   MSG_MONITOR_START,
     37   MSG_MONITOR_STOP,
     38   MSG_MONITOR_SIGNAL
     39 };
     40 
     41 SocketMonitor::SocketMonitor(TransportChannel* channel,
     42                              talk_base::Thread* worker_thread,
     43                              talk_base::Thread* monitor_thread) {
     44   channel_ = channel;
     45   channel_thread_ = worker_thread;
     46   monitoring_thread_ = monitor_thread;
     47   monitoring_ = false;
     48 }
     49 
     50 SocketMonitor::~SocketMonitor() {
     51   channel_thread_->Clear(this);
     52   monitoring_thread_->Clear(this);
     53 }
     54 
     55 void SocketMonitor::Start(int milliseconds) {
     56   rate_ = milliseconds;
     57   if (rate_ < 250)
     58     rate_ = 250;
     59   channel_thread_->Post(this, MSG_MONITOR_START);
     60 }
     61 
     62 void SocketMonitor::Stop() {
     63   channel_thread_->Post(this, MSG_MONITOR_STOP);
     64 }
     65 
     66 void SocketMonitor::OnMessage(talk_base::Message *message) {
     67   talk_base::CritScope cs(&crit_);
     68   switch (message->message_id) {
     69     case MSG_MONITOR_START:
     70       ASSERT(talk_base::Thread::Current() == channel_thread_);
     71       if (!monitoring_) {
     72         monitoring_ = true;
     73         PollSocket(true);
     74       }
     75       break;
     76 
     77     case MSG_MONITOR_STOP:
     78       ASSERT(talk_base::Thread::Current() == channel_thread_);
     79       if (monitoring_) {
     80         monitoring_ = false;
     81         channel_thread_->Clear(this);
     82       }
     83       break;
     84 
     85     case MSG_MONITOR_POLL:
     86       ASSERT(talk_base::Thread::Current() == channel_thread_);
     87       PollSocket(true);
     88       break;
     89 
     90     case MSG_MONITOR_SIGNAL: {
     91       ASSERT(talk_base::Thread::Current() == monitoring_thread_);
     92       std::vector<ConnectionInfo> infos = connection_infos_;
     93       crit_.Leave();
     94       SignalUpdate(this, infos);
     95       crit_.Enter();
     96       break;
     97     }
     98   }
     99 }
    100 
    101 void SocketMonitor::PollSocket(bool poll) {
    102   ASSERT(talk_base::Thread::Current() == channel_thread_);
    103   talk_base::CritScope cs(&crit_);
    104 
    105   // Gather connection infos
    106   channel_->GetStats(&connection_infos_);
    107 
    108   // Signal the monitoring thread, start another poll timer
    109   monitoring_thread_->Post(this, MSG_MONITOR_SIGNAL);
    110   if (poll)
    111     channel_thread_->PostDelayed(rate_, this, MSG_MONITOR_POLL);
    112 }
    113 
    114 }  // namespace cricket
    115