Revert of Make RtcEventLogImpl to use a TaskQueue instead of a helper-thread (patchset #4 id:200001 of https://codereview.webrtc.org/3005153002/ )
Reason for revert:
Landed without CQ, which was unintended.
Original issue's description:
> Reland of Make RtcEventLogImpl to use a TaskQueue instead of a helper-thread (patchset #1 id:1 of https://codereview.webrtc.org/3010143002/ )
>
> Reason for revert:
> I will fix and reland.
>
> Original issue's description:
> > Revert of Make RtcEventLogImpl to use a TaskQueue instead of a helper-thread (patchset #18 id:340001 of https://codereview.webrtc.org/3007473002/ )
> >
> > Reason for revert:
> > Breaks google3 project.
> >
> > Original issue's description:
> > > Make RtcEventLogImpl to use a TaskQueue instead of a helper-thread
> > >
> > > Make RtcEventLogImpl to use a TaskQueue instead of a helper-thread. This will eventually allow us to run multiple log sessions on a single task-queue.
> > >
> > > BUG=webrtc:8142, webrtc:8143, webrtc:8145
> > >
> > > Review-Url: https://codereview.webrtc.org/3007473002
> > > Cr-Commit-Position: refs/heads/master@{#19666}
> > > Committed: https://chromium.googlesource.com/external/webrtc/+/f33cee7534f0469330b6b7aa57f84eec4b082598
> >
> > TBR=terelius@webrtc.org,nisse@webrtc.org,eladalon@webrtc.org
> > # Skipping CQ checks because original CL landed less than 1 days ago.
> > NOPRESUBMIT=true
> > NOTREECHECKS=true
> > NOTRY=true
> > BUG=webrtc:8142, webrtc:8143, webrtc:8145
> >
> > Review-Url: https://codereview.webrtc.org/3010143002
> > Cr-Commit-Position: refs/heads/master@{#19672}
> > Committed: https://chromium.googlesource.com/external/webrtc/+/3eac8002db8fdf5124026d5377a1f3ec1d16bb0d
>
> TBR=terelius@webrtc.org,nisse@webrtc.org,charujain@webrtc.org
> # Skipping CQ checks because original CL landed less than 1 days ago.
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
> BUG=webrtc:8142, webrtc:8143, webrtc:8145
>
> Review-Url: https://codereview.webrtc.org/3005153002
> Cr-Commit-Position: refs/heads/master@{#19690}
> Committed: https://chromium.googlesource.com/external/webrtc/+/d67cefbbeab0a092d1fa250c811c25733dced043
TBR=terelius@webrtc.org,nisse@webrtc.org,kwiberg@webrtc.org,perkj@webrtc.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=webrtc:8142, webrtc:8143, webrtc:8145
Review-Url: https://codereview.webrtc.org/3007193002
Cr-Original-Commit-Position: refs/heads/master@{#19691}
Cr-Mirrored-From: https://chromium.googlesource.com/external/webrtc
Cr-Mirrored-Commit: 23814b7df733d11d7604bf5503aa36263a5fe35c
diff --git a/logging/BUILD.gn b/logging/BUILD.gn
index fac7e3d..6b1e549 100644
--- a/logging/BUILD.gn
+++ b/logging/BUILD.gn
@@ -40,6 +40,8 @@
"rtc_event_log/rtc_event_log.cc",
"rtc_event_log/rtc_event_log_factory.cc",
"rtc_event_log/rtc_event_log_factory.h",
+ "rtc_event_log/rtc_event_log_helper_thread.cc",
+ "rtc_event_log/rtc_event_log_helper_thread.h",
]
defines = []
@@ -52,8 +54,6 @@
"../modules/rtp_rtcp",
"../rtc_base:protobuf_utils",
"../rtc_base:rtc_base_approved",
- "../rtc_base:rtc_task_queue",
- "../rtc_base:sequenced_task_checker",
"../system_wrappers",
]
diff --git a/logging/rtc_event_log/rtc_event_log.cc b/logging/rtc_event_log/rtc_event_log.cc
index d1cad89..e661e67 100644
--- a/logging/rtc_event_log/rtc_event_log.cc
+++ b/logging/rtc_event_log/rtc_event_log.cc
@@ -10,14 +10,11 @@
#include "webrtc/logging/rtc_event_log/rtc_event_log.h"
-#include <atomic>
-#include <deque>
-#include <functional>
#include <limits>
-#include <memory>
#include <utility>
#include <vector>
+#include "webrtc/logging/rtc_event_log/rtc_event_log_helper_thread.h"
#include "webrtc/modules/audio_coding/audio_network_adaptor/include/audio_network_adaptor.h"
#include "webrtc/modules/remote_bitrate_estimator/include/bwe_defines.h"
#include "webrtc/modules/rtp_rtcp/include/rtp_rtcp_defines.h"
@@ -32,67 +29,30 @@
#include "webrtc/modules/rtp_rtcp/source/rtcp_packet/rtpfb.h"
#include "webrtc/modules/rtp_rtcp/source/rtcp_packet/sdes.h"
#include "webrtc/modules/rtp_rtcp/source/rtcp_packet/sender_report.h"
+#include "webrtc/rtc_base/atomicops.h"
#include "webrtc/rtc_base/checks.h"
#include "webrtc/rtc_base/constructormagic.h"
#include "webrtc/rtc_base/event.h"
-#include "webrtc/rtc_base/ignore_wundef.h"
#include "webrtc/rtc_base/logging.h"
#include "webrtc/rtc_base/protobuf_utils.h"
-#include "webrtc/rtc_base/ptr_util.h"
-#include "webrtc/rtc_base/sequenced_task_checker.h"
-#include "webrtc/rtc_base/task_queue.h"
-#include "webrtc/rtc_base/thread_annotations.h"
+#include "webrtc/rtc_base/swap_queue.h"
+#include "webrtc/rtc_base/thread_checker.h"
#include "webrtc/rtc_base/timeutils.h"
#include "webrtc/system_wrappers/include/file_wrapper.h"
-#include "webrtc/typedefs.h"
#ifdef ENABLE_RTC_EVENT_LOG
// *.pb.h files are generated at build-time by the protobuf compiler.
-RTC_PUSH_IGNORING_WUNDEF()
#ifdef WEBRTC_ANDROID_PLATFORM_BUILD
#include "external/webrtc/webrtc/logging/rtc_event_log/rtc_event_log.pb.h"
#else
#include "webrtc/logging/rtc_event_log/rtc_event_log.pb.h"
#endif
-RTC_POP_IGNORING_WUNDEF()
#endif
namespace webrtc {
#ifdef ENABLE_RTC_EVENT_LOG
-namespace {
-const int kEventsInHistory = 10000;
-
-bool IsConfigEvent(const rtclog::Event& event) {
- rtclog::Event_EventType event_type = event.type();
- return event_type == rtclog::Event::VIDEO_RECEIVER_CONFIG_EVENT ||
- event_type == rtclog::Event::VIDEO_SENDER_CONFIG_EVENT ||
- event_type == rtclog::Event::AUDIO_RECEIVER_CONFIG_EVENT ||
- event_type == rtclog::Event::AUDIO_SENDER_CONFIG_EVENT;
-}
-
-// TODO(eladalon): This class exists because C++11 doesn't allow transferring a
-// unique_ptr to a lambda (a copy constructor is required). We should get
-// rid of this when we move to C++14.
-template <typename T>
-class ResourceOwningTask final : public rtc::QueuedTask {
- public:
- ResourceOwningTask(std::unique_ptr<T> resource,
- std::function<void(std::unique_ptr<T>)> handler)
- : resource_(std::move(resource)), handler_(handler) {}
-
- bool Run() override {
- handler_(std::move(resource_));
- return true;
- }
-
- private:
- std::unique_ptr<T> resource_;
- std::function<void(std::unique_ptr<T>)> handler_;
-};
-} // namespace
-
class RtcEventLogImpl final : public RtcEventLog {
friend std::unique_ptr<RtcEventLog> RtcEventLog::Create();
@@ -135,52 +95,24 @@
ProbeFailureReason failure_reason) override;
private:
- void StartLoggingInternal(std::unique_ptr<FileWrapper> file,
- int64_t max_size_bytes);
-
- RtcEventLogImpl(); // Creation is done by RtcEventLog::Create.
+ // Private constructor to ensure that creation is done by RtcEventLog::Create.
+ RtcEventLogImpl();
void StoreEvent(std::unique_ptr<rtclog::Event> event);
void LogProbeResult(int id,
rtclog::BweProbeResult::ResultType result,
int bitrate_bps);
- // Appends an event to the output protobuf string, returning true on success.
- // Fails and returns false in case the limit on output size prevents the
- // event from being added; in this case, the output string is left unchanged.
- bool AppendEventToString(rtclog::Event* event,
- ProtoString* output_string) RTC_WARN_UNUSED_RESULT;
+ static volatile int log_count_;
- void LogToMemory(std::unique_ptr<rtclog::Event> event);
+ // Message queue for passing control messages to the logging thread.
+ SwapQueue<RtcEventLogHelperThread::ControlMessage> message_queue_;
- void StartLogFile();
- void LogToFile(std::unique_ptr<rtclog::Event> event);
- void StopLogFile(int64_t stop_time);
+ // Message queue for passing events to the logging thread.
+ SwapQueue<std::unique_ptr<rtclog::Event> > event_queue_;
- // Observe a limit on the number of concurrent logs, so as not to run into
- // OS-imposed limits on open files and/or threads/task-queues.
- // TODO(eladalon): Known issue - there's a race over |log_count_|.
- static std::atomic<int> log_count_;
-
- // Make sure that the event log is "managed" - created/destroyed, as well
- // as started/stopped - from the same thread/task-queue.
- rtc::SequencedTaskChecker owner_sequence_checker_;
-
- // History containing all past configuration events.
- std::vector<std::unique_ptr<rtclog::Event>> config_history_
- ACCESS_ON(task_queue_);
-
- // History containing the most recent (non-configuration) events (~10s).
- std::deque<std::unique_ptr<rtclog::Event>> history_ ACCESS_ON(task_queue_);
-
- std::unique_ptr<FileWrapper> file_ ACCESS_ON(task_queue_);
-
- size_t max_size_bytes_ ACCESS_ON(task_queue_);
- size_t written_bytes_ ACCESS_ON(task_queue_);
-
- // Keep this last to ensure it destructs first, or else tasks living on the
- // queue might access other members after they've been torn down.
- rtc::TaskQueue task_queue_;
+ RtcEventLogHelperThread helper_thread_;
+ rtc::ThreadChecker thread_checker_;
RTC_DISALLOW_COPY_AND_ASSIGN(RtcEventLogImpl);
};
@@ -232,46 +164,66 @@
return rtclog::BweProbeResult::SUCCESS;
}
+// The RTP and RTCP buffers reserve space for twice the expected number of
+// sent packets because they also contain received packets.
+static const int kEventsPerSecond = 1000;
+static const int kControlMessagesPerSecond = 10;
} // namespace
-std::atomic<int> RtcEventLogImpl::log_count_(0);
+volatile int RtcEventLogImpl::log_count_ = 0;
+// RtcEventLogImpl member functions.
RtcEventLogImpl::RtcEventLogImpl()
- : file_(FileWrapper::Create()),
- max_size_bytes_(std::numeric_limits<decltype(max_size_bytes_)>::max()),
- written_bytes_(0),
- task_queue_("rtc_event_log") {}
+ // Allocate buffers for roughly one second of history.
+ : message_queue_(kControlMessagesPerSecond),
+ event_queue_(kEventsPerSecond),
+ helper_thread_(&message_queue_, &event_queue_),
+ thread_checker_() {
+ thread_checker_.DetachFromThread();
+}
RtcEventLogImpl::~RtcEventLogImpl() {
- RTC_DCHECK_CALLED_SEQUENTIALLY(&owner_sequence_checker_);
-
- // If we're logging to the file, this will stop that. Blocking function.
- StopLogging();
-
- int count = std::atomic_fetch_sub(&RtcEventLogImpl::log_count_, 1) - 1;
+ // The RtcEventLogHelperThread destructor closes the file
+ // and waits for the thread to terminate.
+ int count = rtc::AtomicOps::Decrement(&RtcEventLogImpl::log_count_);
RTC_DCHECK_GE(count, 0);
}
bool RtcEventLogImpl::StartLogging(const std::string& file_name,
int64_t max_size_bytes) {
- RTC_DCHECK_CALLED_SEQUENTIALLY(&owner_sequence_checker_);
-
- auto file = rtc::WrapUnique<FileWrapper>(FileWrapper::Create());
- if (!file->OpenFile(file_name.c_str(), false)) {
+ RTC_DCHECK(thread_checker_.CalledOnValidThread());
+ RtcEventLogHelperThread::ControlMessage message;
+ message.message_type = RtcEventLogHelperThread::ControlMessage::START_FILE;
+ message.max_size_bytes = max_size_bytes <= 0
+ ? std::numeric_limits<int64_t>::max()
+ : max_size_bytes;
+ message.start_time = rtc::TimeMicros();
+ message.stop_time = std::numeric_limits<int64_t>::max();
+ message.file.reset(FileWrapper::Create());
+ if (!message.file->OpenFile(file_name.c_str(), false)) {
LOG(LS_ERROR) << "Can't open file. WebRTC event log not started.";
return false;
}
-
- StartLoggingInternal(std::move(file), max_size_bytes);
-
+ if (!message_queue_.Insert(&message)) {
+ LOG(LS_ERROR) << "Message queue full. Can't start logging.";
+ return false;
+ }
+ helper_thread_.SignalNewEvent();
+ LOG(LS_INFO) << "Starting WebRTC event log.";
return true;
}
bool RtcEventLogImpl::StartLogging(rtc::PlatformFile platform_file,
int64_t max_size_bytes) {
- RTC_DCHECK_CALLED_SEQUENTIALLY(&owner_sequence_checker_);
-
- auto file = rtc::WrapUnique<FileWrapper>(FileWrapper::Create());
+ RTC_DCHECK(thread_checker_.CalledOnValidThread());
+ RtcEventLogHelperThread::ControlMessage message;
+ message.message_type = RtcEventLogHelperThread::ControlMessage::START_FILE;
+ message.max_size_bytes = max_size_bytes <= 0
+ ? std::numeric_limits<int64_t>::max()
+ : max_size_bytes;
+ message.start_time = rtc::TimeMicros();
+ message.stop_time = std::numeric_limits<int64_t>::max();
+ message.file.reset(FileWrapper::Create());
FILE* file_handle = rtc::FdopenPlatformFileForWriting(platform_file);
if (!file_handle) {
LOG(LS_ERROR) << "Can't open file. WebRTC event log not started.";
@@ -282,36 +234,37 @@
}
return false;
}
- if (!file->OpenFromFileHandle(file_handle)) {
+ if (!message.file->OpenFromFileHandle(file_handle)) {
LOG(LS_ERROR) << "Can't open file. WebRTC event log not started.";
return false;
}
-
- StartLoggingInternal(std::move(file), max_size_bytes);
-
+ if (!message_queue_.Insert(&message)) {
+ LOG(LS_ERROR) << "Message queue full. Can't start logging.";
+ return false;
+ }
+ helper_thread_.SignalNewEvent();
+ LOG(LS_INFO) << "Starting WebRTC event log.";
return true;
}
void RtcEventLogImpl::StopLogging() {
- RTC_DCHECK_CALLED_SEQUENTIALLY(&owner_sequence_checker_);
-
+ RTC_DCHECK(thread_checker_.CalledOnValidThread());
+ RtcEventLogHelperThread::ControlMessage message;
+ message.message_type = RtcEventLogHelperThread::ControlMessage::STOP_FILE;
+ message.stop_time = rtc::TimeMicros();
+ while (!message_queue_.Insert(&message)) {
+ // TODO(terelius): We would like to have a blocking Insert function in the
+ // SwapQueue, but for the time being we will just clear any previous
+ // messages.
+ // Since StopLogging waits for the thread, it is essential that we don't
+ // clear any STOP_FILE messages. To ensure that there is only one call at a
+ // time, we require that all calls to StopLogging are made on the same
+ // thread.
+ LOG(LS_ERROR) << "Message queue full. Clearing queue to stop logging.";
+ message_queue_.Clear();
+ }
LOG(LS_INFO) << "Stopping WebRTC event log.";
-
- const int64_t stop_time = rtc::TimeMicros();
-
- rtc::Event file_finished(true, false);
-
- task_queue_.PostTask([this, stop_time, &file_finished]() {
- RTC_DCHECK_RUN_ON(&task_queue_);
- if (file_->is_open()) {
- StopLogFile(stop_time);
- }
- file_finished.Set();
- });
-
- file_finished.Wait(rtc::Event::kForever);
-
- LOG(LS_INFO) << "WebRTC event log successfully stopped.";
+ helper_thread_.WaitForFileFinished();
}
void RtcEventLogImpl::LogVideoReceiveStreamConfig(
@@ -612,197 +565,12 @@
StoreEvent(std::move(event));
}
-void RtcEventLogImpl::StartLoggingInternal(std::unique_ptr<FileWrapper> file,
- int64_t max_size_bytes) {
- LOG(LS_INFO) << "Starting WebRTC event log.";
-
- max_size_bytes = (max_size_bytes <= 0)
- ? std::numeric_limits<decltype(max_size_bytes)>::max()
- : max_size_bytes;
- auto file_handler = [this,
- max_size_bytes](std::unique_ptr<FileWrapper> file) {
- RTC_DCHECK_RUN_ON(&task_queue_);
- if (!file_->is_open()) {
- max_size_bytes_ = max_size_bytes;
- file_ = std::move(file);
- StartLogFile();
- } else {
- // Already started. Ignore message and close file handle.
- file->CloseFile();
- }
- };
- task_queue_.PostTask(rtc::MakeUnique<ResourceOwningTask<FileWrapper>>(
- std::move(file), file_handler));
-}
-
void RtcEventLogImpl::StoreEvent(std::unique_ptr<rtclog::Event> event) {
- RTC_DCHECK(event);
-
- auto event_handler = [this](std::unique_ptr<rtclog::Event> rtclog_event) {
- RTC_DCHECK_RUN_ON(&task_queue_);
- if (file_->is_open()) {
- LogToFile(std::move(rtclog_event));
- } else {
- LogToMemory(std::move(rtclog_event));
- }
- };
-
- task_queue_.PostTask(rtc::MakeUnique<ResourceOwningTask<rtclog::Event>>(
- std::move(event), event_handler));
-}
-
-bool RtcEventLogImpl::AppendEventToString(rtclog::Event* event,
- ProtoString* output_string) {
- RTC_DCHECK_RUN_ON(&task_queue_);
-
- // Even though we're only serializing a single event during this call, what
- // we intend to get is a list of events, with a tag and length preceding
- // each actual event. To produce that, we serialize a list of a single event.
- // If we later serialize additional events, the resulting ProtoString will
- // be a proper concatenation of all those events.
-
- rtclog::EventStream event_stream;
- event_stream.add_stream();
-
- // As a tweak, we swap the new event into the event-stream, write that to
- // file, then swap back. This saves on some copying.
- rtclog::Event* output_event = event_stream.mutable_stream(0);
- output_event->Swap(event);
-
- bool appended;
- size_t potential_new_size =
- written_bytes_ + output_string->size() + event_stream.ByteSize();
- if (potential_new_size <= max_size_bytes_) {
- event_stream.AppendToString(output_string);
- appended = true;
- } else {
- appended = false;
+ RTC_DCHECK(event.get() != nullptr);
+ if (!event_queue_.Insert(&event)) {
+ LOG(LS_ERROR) << "WebRTC event log queue full. Dropping event.";
}
-
- // When the function returns, the original Event will be unchanged.
- output_event->Swap(event);
-
- return appended;
-}
-
-void RtcEventLogImpl::LogToMemory(std::unique_ptr<rtclog::Event> event) {
- RTC_DCHECK_RUN_ON(&task_queue_);
- RTC_DCHECK(!file_->is_open());
-
- if (IsConfigEvent(*event.get())) {
- config_history_.push_back(std::move(event));
- } else {
- history_.push_back(std::move(event));
- if (history_.size() > kEventsInHistory) {
- history_.pop_front();
- }
- }
-}
-
-void RtcEventLogImpl::StartLogFile() {
- RTC_DCHECK_RUN_ON(&task_queue_);
- RTC_DCHECK(file_->is_open());
-
- ProtoString output_string;
-
- // Create and serialize the LOG_START event.
- // The timestamp used will correspond to when logging has started. The log
- // may contain events earlier than the LOG_START event. (In general, the
- // timestamps in the log are not monotonic.)
- rtclog::Event start_event;
- start_event.set_timestamp_us(rtc::TimeMicros());
- start_event.set_type(rtclog::Event::LOG_START);
- bool appended = AppendEventToString(&start_event, &output_string);
-
- // Serialize the config information for all old streams, including streams
- // which were already logged to previous files.
- for (auto& event : config_history_) {
- if (!appended) {
- break;
- }
- appended = AppendEventToString(event.get(), &output_string);
- }
-
- // Serialize the events in the event queue.
- while (appended && !history_.empty()) {
- appended = AppendEventToString(history_.front().get(), &output_string);
- if (appended) {
- // Known issue - if writing to the file fails, these events will have
- // been lost. If we try to open a new file, these events will be missing
- // from it.
- history_.pop_front();
- }
- }
-
- // Write to file.
- if (!file_->Write(output_string.data(), output_string.size())) {
- LOG(LS_ERROR) << "FileWrapper failed to write WebRtcEventLog file.";
- // The current FileWrapper implementation closes the file on error.
- RTC_DCHECK(!file_->is_open());
- return;
- }
- written_bytes_ += output_string.size();
-
- if (!appended) {
- RTC_DCHECK(file_->is_open());
- StopLogFile(rtc::TimeMicros());
- }
-}
-
-void RtcEventLogImpl::LogToFile(std::unique_ptr<rtclog::Event> event) {
- RTC_DCHECK_RUN_ON(&task_queue_);
- RTC_DCHECK(file_->is_open());
-
- ProtoString output_string;
-
- bool appended = AppendEventToString(event.get(), &output_string);
-
- if (IsConfigEvent(*event.get())) {
- config_history_.push_back(std::move(event));
- }
-
- if (!appended) {
- RTC_DCHECK(file_->is_open());
- history_.push_back(std::move(event));
- StopLogFile(rtc::TimeMicros());
- return;
- }
-
- // Write string to file.
- if (file_->Write(output_string.data(), output_string.size())) {
- written_bytes_ += output_string.size();
- } else {
- LOG(LS_ERROR) << "FileWrapper failed to write WebRtcEventLog file.";
- // The current FileWrapper implementation closes the file on error.
- RTC_DCHECK(!file_->is_open());
- }
-}
-
-void RtcEventLogImpl::StopLogFile(int64_t stop_time) {
- RTC_DCHECK_RUN_ON(&task_queue_);
- RTC_DCHECK(file_->is_open());
-
- ProtoString output_string;
-
- rtclog::Event end_event;
- end_event.set_timestamp_us(stop_time);
- end_event.set_type(rtclog::Event::LOG_END);
- bool appended = AppendEventToString(&end_event, &output_string);
-
- if (appended) {
- if (!file_->Write(output_string.data(), output_string.size())) {
- LOG(LS_ERROR) << "FileWrapper failed to write WebRtcEventLog file.";
- // The current FileWrapper implementation closes the file on error.
- RTC_DCHECK(!file_->is_open());
- }
- written_bytes_ += output_string.size();
- }
-
- max_size_bytes_ = std::numeric_limits<decltype(max_size_bytes_)>::max();
- written_bytes_ = 0;
-
- file_->CloseFile();
- RTC_DCHECK(!file_->is_open());
+ helper_thread_.SignalNewEvent();
}
bool RtcEventLog::ParseRtcEventLog(const std::string& file_name,
@@ -826,18 +594,17 @@
// RtcEventLog member functions.
std::unique_ptr<RtcEventLog> RtcEventLog::Create() {
#ifdef ENABLE_RTC_EVENT_LOG
- // TODO(eladalon): Known issue - there's a race over |log_count_| here.
constexpr int kMaxLogCount = 5;
- int count = 1 + std::atomic_fetch_add(&RtcEventLogImpl::log_count_, 1);
+ int count = rtc::AtomicOps::Increment(&RtcEventLogImpl::log_count_);
if (count > kMaxLogCount) {
LOG(LS_WARNING) << "Denied creation of additional WebRTC event logs. "
<< count - 1 << " logs open already.";
- std::atomic_fetch_sub(&RtcEventLogImpl::log_count_, 1);
+ rtc::AtomicOps::Decrement(&RtcEventLogImpl::log_count_);
return std::unique_ptr<RtcEventLog>(new RtcEventLogNullImpl());
}
return std::unique_ptr<RtcEventLog>(new RtcEventLogImpl());
#else
- return CreateNull();
+ return std::unique_ptr<RtcEventLog>(new RtcEventLogNullImpl());
#endif // ENABLE_RTC_EVENT_LOG
}
diff --git a/logging/rtc_event_log/rtc_event_log.h b/logging/rtc_event_log/rtc_event_log.h
index 087f5d9..d26dccb 100644
--- a/logging/rtc_event_log/rtc_event_log.h
+++ b/logging/rtc_event_log/rtc_event_log.h
@@ -98,17 +98,16 @@
int64_t max_size_bytes) = 0;
// Deprecated. Pass an explicit file size limit.
- RTC_DEPRECATED bool StartLogging(const std::string& file_name) {
+ bool StartLogging(const std::string& file_name) {
return StartLogging(file_name, 10000000);
}
// Deprecated. Pass an explicit file size limit.
- RTC_DEPRECATED bool StartLogging(rtc::PlatformFile platform_file) {
+ bool StartLogging(rtc::PlatformFile platform_file) {
return StartLogging(platform_file, 10000000);
}
- // Stops logging to file and waits until the file has been closed, after
- // which it would be permissible to read and/or modify it.
+ // Stops logging to file and waits until the thread has finished.
virtual void StopLogging() = 0;
// Logs configuration information for a video receive stream.
diff --git a/logging/rtc_event_log/rtc_event_log_helper_thread.cc b/logging/rtc_event_log/rtc_event_log_helper_thread.cc
new file mode 100644
index 0000000..a98336f
--- /dev/null
+++ b/logging/rtc_event_log/rtc_event_log_helper_thread.cc
@@ -0,0 +1,315 @@
+/*
+ * Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "webrtc/logging/rtc_event_log/rtc_event_log_helper_thread.h"
+
+#include <algorithm>
+
+#include "webrtc/rtc_base/checks.h"
+#include "webrtc/rtc_base/logging.h"
+#include "webrtc/rtc_base/timeutils.h"
+
+#ifdef ENABLE_RTC_EVENT_LOG
+
+namespace webrtc {
+
+namespace {
+const int kEventsInHistory = 10000;
+
+bool IsConfigEvent(const rtclog::Event& event) {
+ rtclog::Event_EventType event_type = event.type();
+ return event_type == rtclog::Event::VIDEO_RECEIVER_CONFIG_EVENT ||
+ event_type == rtclog::Event::VIDEO_SENDER_CONFIG_EVENT ||
+ event_type == rtclog::Event::AUDIO_RECEIVER_CONFIG_EVENT ||
+ event_type == rtclog::Event::AUDIO_SENDER_CONFIG_EVENT;
+}
+} // namespace
+
+// RtcEventLogImpl member functions.
+RtcEventLogHelperThread::RtcEventLogHelperThread(
+ SwapQueue<ControlMessage>* message_queue,
+ SwapQueue<std::unique_ptr<rtclog::Event>>* event_queue)
+ : message_queue_(message_queue),
+ event_queue_(event_queue),
+ file_(FileWrapper::Create()),
+ thread_(&ThreadOutputFunction, this, "RtcEventLog thread"),
+ max_size_bytes_(std::numeric_limits<int64_t>::max()),
+ written_bytes_(0),
+ start_time_(0),
+ stop_time_(std::numeric_limits<int64_t>::max()),
+ has_recent_event_(false),
+ wake_periodically_(false, false),
+ wake_from_hibernation_(false, false),
+ file_finished_(false, false) {
+ RTC_DCHECK(message_queue_);
+ RTC_DCHECK(event_queue_);
+ thread_.Start();
+}
+
+RtcEventLogHelperThread::~RtcEventLogHelperThread() {
+ ControlMessage message;
+ message.message_type = ControlMessage::TERMINATE_THREAD;
+ message.stop_time = rtc::TimeMicros();
+ while (!message_queue_->Insert(&message)) {
+ // We can't destroy the event log until we have stopped the thread,
+ // so clear the message queue and try again. Note that if we clear
+ // any STOP_FILE events, then the threads calling StopLogging would likely
+ // wait indefinitely. However, there should not be any such calls as we
+ // are executing the destructor.
+ LOG(LS_WARNING) << "Clearing message queue to terminate thread.";
+ message_queue_->Clear();
+ }
+ wake_from_hibernation_.Set();
+ wake_periodically_.Set(); // Wake up the output thread.
+ thread_.Stop(); // Wait for the thread to terminate.
+}
+
+void RtcEventLogHelperThread::WaitForFileFinished() {
+ wake_from_hibernation_.Set();
+ wake_periodically_.Set();
+ file_finished_.Wait(rtc::Event::kForever);
+}
+
+void RtcEventLogHelperThread::SignalNewEvent() {
+ wake_from_hibernation_.Set();
+}
+
+bool RtcEventLogHelperThread::AppendEventToString(rtclog::Event* event) {
+ rtclog::EventStream event_stream;
+ event_stream.add_stream();
+ event_stream.mutable_stream(0)->Swap(event);
+ // We create a new event stream per event but because of the way protobufs
+ // are encoded, events can be merged by concatenating them. Therefore,
+ // it will look like a single stream when we read it back from file.
+ bool stop = true;
+ if (written_bytes_ + static_cast<int64_t>(output_string_.size()) +
+ event_stream.ByteSize() <=
+ max_size_bytes_) {
+ event_stream.AppendToString(&output_string_);
+ stop = false;
+ }
+ // Swap the event back so that we don't mix event types in the queues.
+ event_stream.mutable_stream(0)->Swap(event);
+ return stop;
+}
+
+bool RtcEventLogHelperThread::LogToMemory() {
+ RTC_DCHECK(!file_->is_open());
+ bool message_received = false;
+
+ // Process each event earlier than the current time and append it to the
+ // appropriate history_.
+ int64_t current_time = rtc::TimeMicros();
+ if (!has_recent_event_) {
+ has_recent_event_ = event_queue_->Remove(&most_recent_event_);
+ }
+ while (has_recent_event_ &&
+ most_recent_event_->timestamp_us() <= current_time) {
+ if (IsConfigEvent(*most_recent_event_)) {
+ config_history_.push_back(std::move(most_recent_event_));
+ } else {
+ history_.push_back(std::move(most_recent_event_));
+ if (history_.size() > kEventsInHistory)
+ history_.pop_front();
+ }
+ has_recent_event_ = event_queue_->Remove(&most_recent_event_);
+ message_received = true;
+ }
+ return message_received;
+}
+
+void RtcEventLogHelperThread::StartLogFile() {
+ RTC_DCHECK(file_->is_open());
+ bool stop = false;
+ output_string_.clear();
+
+ // Create and serialize the LOG_START event.
+ rtclog::Event start_event;
+ start_event.set_timestamp_us(start_time_);
+ start_event.set_type(rtclog::Event::LOG_START);
+ AppendEventToString(&start_event);
+
+ // Serialize the config information for all old streams.
+ for (auto& event : config_history_) {
+ AppendEventToString(event.get());
+ }
+
+ // Serialize the events in the event queue.
+ while (!history_.empty() && !stop) {
+ stop = AppendEventToString(history_.front().get());
+ if (!stop) {
+ history_.pop_front();
+ }
+ }
+
+ // Write to file.
+ if (!file_->Write(output_string_.data(), output_string_.size())) {
+ LOG(LS_ERROR) << "FileWrapper failed to write WebRtcEventLog file.";
+ // The current FileWrapper implementation closes the file on error.
+ RTC_DCHECK(!file_->is_open());
+ return;
+ }
+ written_bytes_ += output_string_.size();
+
+ // Free the allocated memory since we probably won't need this amount of
+ // space again.
+ output_string_.clear();
+ output_string_.shrink_to_fit();
+
+ if (stop) {
+ RTC_DCHECK(file_->is_open());
+ StopLogFile();
+ }
+}
+
+bool RtcEventLogHelperThread::LogToFile() {
+ RTC_DCHECK(file_->is_open());
+ output_string_.clear();
+ bool message_received = false;
+
+ // Append each event older than both the current time and the stop time
+ // to the output_string_.
+ int64_t current_time = rtc::TimeMicros();
+ int64_t time_limit = std::min(current_time, stop_time_);
+ if (!has_recent_event_) {
+ has_recent_event_ = event_queue_->Remove(&most_recent_event_);
+ }
+ bool stop = false;
+ while (!stop && has_recent_event_ &&
+ most_recent_event_->timestamp_us() <= time_limit) {
+ stop = AppendEventToString(most_recent_event_.get());
+ if (!stop) {
+ if (IsConfigEvent(*most_recent_event_)) {
+ config_history_.push_back(std::move(most_recent_event_));
+ }
+ has_recent_event_ = event_queue_->Remove(&most_recent_event_);
+ }
+ message_received = true;
+ }
+
+ // Write string to file.
+ if (!file_->Write(output_string_.data(), output_string_.size())) {
+ LOG(LS_ERROR) << "FileWrapper failed to write WebRtcEventLog file.";
+ // The current FileWrapper implementation closes the file on error.
+ RTC_DCHECK(!file_->is_open());
+ return message_received;
+ }
+ written_bytes_ += output_string_.size();
+
+ // We want to stop logging if we have reached the file size limit. We also
+ // want to stop logging if the remaining events are more recent than the
+ // time limit, or in other words if we have terminated the loop despite
+ // having more events in the queue.
+ if ((has_recent_event_ && most_recent_event_->timestamp_us() > stop_time_) ||
+ stop) {
+ RTC_DCHECK(file_->is_open());
+ StopLogFile();
+ }
+ return message_received;
+}
+
+void RtcEventLogHelperThread::StopLogFile() {
+ RTC_DCHECK(file_->is_open());
+ output_string_.clear();
+
+ rtclog::Event end_event;
+ // This function can be called either because we have reached the stop time,
+ // or because we have reached the log file size limit. Therefore, use the
+ // current time if we have not reached the time limit.
+ end_event.set_timestamp_us(
+ std::min(stop_time_, rtc::TimeMicros()));
+ end_event.set_type(rtclog::Event::LOG_END);
+ AppendEventToString(&end_event);
+
+ if (written_bytes_ + static_cast<int64_t>(output_string_.size()) <=
+ max_size_bytes_) {
+ if (!file_->Write(output_string_.data(), output_string_.size())) {
+ LOG(LS_ERROR) << "FileWrapper failed to write WebRtcEventLog file.";
+ // The current FileWrapper implementation closes the file on error.
+ RTC_DCHECK(!file_->is_open());
+ }
+ written_bytes_ += output_string_.size();
+ }
+
+ max_size_bytes_ = std::numeric_limits<int64_t>::max();
+ written_bytes_ = 0;
+ start_time_ = 0;
+ stop_time_ = std::numeric_limits<int64_t>::max();
+ output_string_.clear();
+ file_->CloseFile();
+ RTC_DCHECK(!file_->is_open());
+}
+
+void RtcEventLogHelperThread::ProcessEvents() {
+ ControlMessage message;
+
+ while (true) {
+ bool message_received = false;
+ // Process control messages.
+ while (message_queue_->Remove(&message)) {
+ switch (message.message_type) {
+ case ControlMessage::START_FILE:
+ if (!file_->is_open()) {
+ max_size_bytes_ = message.max_size_bytes;
+ start_time_ = message.start_time;
+ stop_time_ = message.stop_time;
+ file_.swap(message.file);
+ StartLogFile();
+ } else {
+ // Already started. Ignore message and close file handle.
+ message.file->CloseFile();
+ }
+ message_received = true;
+ break;
+ case ControlMessage::STOP_FILE:
+ if (file_->is_open()) {
+ stop_time_ = message.stop_time;
+ LogToFile(); // Log remaining events from message queues.
+ }
+ // LogToFile might stop on it's own so we need to recheck the state.
+ if (file_->is_open()) {
+ StopLogFile();
+ }
+ file_finished_.Set();
+ message_received = true;
+ break;
+ case ControlMessage::TERMINATE_THREAD:
+ if (file_->is_open()) {
+ StopLogFile();
+ }
+ return;
+ }
+ }
+
+ // Write events to file or memory.
+ if (file_->is_open()) {
+ message_received |= LogToFile();
+ } else {
+ message_received |= LogToMemory();
+ }
+
+ // Accumulate a new batch of events instead of processing them one at a
+ // time.
+ if (message_received) {
+ wake_periodically_.Wait(100);
+ } else {
+ wake_from_hibernation_.Wait(rtc::Event::kForever);
+ }
+ }
+}
+
+void RtcEventLogHelperThread::ThreadOutputFunction(void* obj) {
+ RtcEventLogHelperThread* helper = static_cast<RtcEventLogHelperThread*>(obj);
+ helper->ProcessEvents();
+}
+
+} // namespace webrtc
+
+#endif // ENABLE_RTC_EVENT_LOG
diff --git a/logging/rtc_event_log/rtc_event_log_helper_thread.h b/logging/rtc_event_log/rtc_event_log_helper_thread.h
new file mode 100644
index 0000000..0d9ad4d
--- /dev/null
+++ b/logging/rtc_event_log/rtc_event_log_helper_thread.h
@@ -0,0 +1,128 @@
+/*
+ * Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+
+#ifndef WEBRTC_LOGGING_RTC_EVENT_LOG_RTC_EVENT_LOG_HELPER_THREAD_H_
+#define WEBRTC_LOGGING_RTC_EVENT_LOG_RTC_EVENT_LOG_HELPER_THREAD_H_
+
+#include <deque>
+#include <limits>
+#include <memory>
+#include <utility>
+#include <vector>
+
+#include "webrtc/rtc_base/constructormagic.h"
+#include "webrtc/rtc_base/event.h"
+#include "webrtc/rtc_base/ignore_wundef.h"
+#include "webrtc/rtc_base/platform_thread.h"
+#include "webrtc/rtc_base/protobuf_utils.h"
+#include "webrtc/rtc_base/swap_queue.h"
+#include "webrtc/system_wrappers/include/file_wrapper.h"
+
+#ifdef ENABLE_RTC_EVENT_LOG
+// *.ph.h files are generated at build-time by the protobuf compiler.
+RTC_PUSH_IGNORING_WUNDEF()
+#ifdef WEBRTC_ANDROID_PLATFORM_BUILD
+#include "external/webrtc/webrtc/logging/rtc_event_log/rtc_event_log.pb.h"
+#else
+#include "webrtc/logging/rtc_event_log/rtc_event_log.pb.h"
+#endif
+RTC_POP_IGNORING_WUNDEF()
+#endif
+
+#ifdef ENABLE_RTC_EVENT_LOG
+
+namespace webrtc {
+
+class RtcEventLogHelperThread final {
+ public:
+ struct ControlMessage {
+ ControlMessage()
+ : message_type(STOP_FILE),
+ file(nullptr),
+ max_size_bytes(0),
+ start_time(0),
+ stop_time(0) {}
+ enum { START_FILE, STOP_FILE, TERMINATE_THREAD } message_type;
+
+ std::unique_ptr<FileWrapper> file; // Only used with START_FILE.
+ int64_t max_size_bytes; // Only used with START_FILE.
+ int64_t start_time; // Only used with START_FILE.
+ int64_t stop_time; // Used with all 3 message types.
+
+ friend void swap(ControlMessage& lhs, ControlMessage& rhs) {
+ using std::swap;
+ swap(lhs.message_type, rhs.message_type);
+ lhs.file.swap(rhs.file);
+ swap(lhs.max_size_bytes, rhs.max_size_bytes);
+ swap(lhs.start_time, rhs.start_time);
+ swap(lhs.stop_time, rhs.stop_time);
+ }
+ };
+
+ RtcEventLogHelperThread(
+ SwapQueue<ControlMessage>* message_queue,
+ SwapQueue<std::unique_ptr<rtclog::Event>>* event_queue);
+ ~RtcEventLogHelperThread();
+
+ // This function MUST be called once a STOP_FILE message is added to the
+ // signalling queue. The function will make sure that the output thread
+ // wakes up to read the message, and it blocks until the output thread has
+ // finished writing to the file.
+ void WaitForFileFinished();
+
+ // This fuction MUST be called once an event is added to the event queue.
+ void SignalNewEvent();
+
+ private:
+ static void ThreadOutputFunction(void* obj);
+
+ bool AppendEventToString(rtclog::Event* event);
+ bool LogToMemory();
+ void StartLogFile();
+ bool LogToFile();
+ void StopLogFile();
+ void ProcessEvents();
+
+ // Message queues for passing events to the logging thread.
+ SwapQueue<ControlMessage>* message_queue_;
+ SwapQueue<std::unique_ptr<rtclog::Event>>* event_queue_;
+
+ // History containing the most recent events (~ 10 s).
+ std::deque<std::unique_ptr<rtclog::Event>> history_;
+
+ // History containing all past configuration events.
+ std::vector<std::unique_ptr<rtclog::Event>> config_history_;
+
+ std::unique_ptr<FileWrapper> file_;
+ rtc::PlatformThread thread_;
+
+ int64_t max_size_bytes_;
+ int64_t written_bytes_;
+ int64_t start_time_;
+ int64_t stop_time_;
+
+ bool has_recent_event_;
+ std::unique_ptr<rtclog::Event> most_recent_event_;
+
+ // Temporary space for serializing profobuf data.
+ ProtoString output_string_;
+
+ rtc::Event wake_periodically_;
+ rtc::Event wake_from_hibernation_;
+ rtc::Event file_finished_;
+
+ RTC_DISALLOW_IMPLICIT_CONSTRUCTORS(RtcEventLogHelperThread);
+};
+
+} // namespace webrtc
+
+#endif // ENABLE_RTC_EVENT_LOG
+
+#endif // WEBRTC_LOGGING_RTC_EVENT_LOG_RTC_EVENT_LOG_HELPER_THREAD_H_
diff --git a/pc/peerconnection.cc b/pc/peerconnection.cc
index 99b87c0..e22a09e 100644
--- a/pc/peerconnection.cc
+++ b/pc/peerconnection.cc
@@ -1337,11 +1337,11 @@
rtc::Bind(&cricket::PortAllocator::DiscardCandidatePool,
port_allocator_.get()));
- factory_->worker_thread()->Invoke<void>(RTC_FROM_HERE, [this] {
- call_.reset();
- // The event log must outlive call (and any other object that uses it).
- event_log_.reset();
- });
+ factory_->worker_thread()->Invoke<void>(RTC_FROM_HERE,
+ [this] { call_.reset(); });
+
+ // The event log must outlive call (and any other object that uses it).
+ event_log_.reset();
}
void PeerConnection::OnSessionStateChange(WebRtcSession* /*session*/,
diff --git a/pc/peerconnectionfactory.cc b/pc/peerconnectionfactory.cc
index 6da4669..d4ee405 100644
--- a/pc/peerconnectionfactory.cc
+++ b/pc/peerconnectionfactory.cc
@@ -262,9 +262,8 @@
allocator.get(), options_.network_ignore_mask));
std::unique_ptr<RtcEventLog> event_log =
- worker_thread_->Invoke<std::unique_ptr<RtcEventLog>>(
- RTC_FROM_HERE,
- rtc::Bind(&PeerConnectionFactory::CreateRtcEventLog_w, this));
+ event_log_factory_ ? event_log_factory_->CreateRtcEventLog()
+ : rtc::MakeUnique<RtcEventLogNullImpl>();
std::unique_ptr<Call> call = worker_thread_->Invoke<std::unique_ptr<Call>>(
RTC_FROM_HERE,
@@ -332,11 +331,6 @@
return network_thread_;
}
-std::unique_ptr<RtcEventLog> PeerConnectionFactory::CreateRtcEventLog_w() {
- return event_log_factory_ ? event_log_factory_->CreateRtcEventLog()
- : rtc::MakeUnique<RtcEventLogNullImpl>();
-}
-
std::unique_ptr<Call> PeerConnectionFactory::CreateCall_w(
RtcEventLog* event_log) {
const int kMinBandwidthBps = 30000;
diff --git a/pc/peerconnectionfactory.h b/pc/peerconnectionfactory.h
index 82440e7..ebd3016 100644
--- a/pc/peerconnectionfactory.h
+++ b/pc/peerconnectionfactory.h
@@ -121,7 +121,6 @@
virtual ~PeerConnectionFactory();
private:
- std::unique_ptr<RtcEventLog> CreateRtcEventLog_w();
std::unique_ptr<Call> CreateCall_w(RtcEventLog* event_log);
bool wraps_current_thread_;
