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Unified Diff: chrome/browser/sync/engine/syncer_thread_pthreads.cc

Issue 235010: Reverting 27117. (Closed) Base URL: svn://chrome-svn/chrome/trunk/src/
Patch Set: Created 11 years, 3 months ago
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Index: chrome/browser/sync/engine/syncer_thread_pthreads.cc
===================================================================
--- chrome/browser/sync/engine/syncer_thread_pthreads.cc (revision 27123)
+++ chrome/browser/sync/engine/syncer_thread_pthreads.cc (working copy)
@@ -1,578 +0,0 @@
-// Copyright (c) 2009 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-#include "chrome/browser/sync/engine/syncer_thread_pthreads.h"
-
-#include "build/build_config.h"
-
-#ifdef OS_MACOSX
-#include <CoreFoundation/CFNumber.h>
-#include <IOKit/IOTypes.h>
-#include <IOKit/IOKitLib.h>
-#endif
-
-#include <algorithm>
-#include <map>
-#include <queue>
-
-#include "chrome/browser/sync/engine/auth_watcher.h"
-#include "chrome/browser/sync/engine/model_safe_worker.h"
-#include "chrome/browser/sync/engine/net/server_connection_manager.h"
-#include "chrome/browser/sync/engine/syncer.h"
-#include "chrome/browser/sync/notifier/listener/talk_mediator.h"
-#include "chrome/browser/sync/notifier/listener/talk_mediator_impl.h"
-#include "chrome/browser/sync/syncable/directory_manager.h"
-
-using std::priority_queue;
-using std::min;
-
-static inline bool operator < (const timespec& a, const timespec& b) {
- return a.tv_sec == b.tv_sec ? a.tv_nsec < b.tv_nsec : a.tv_sec < b.tv_sec;
-}
-
-namespace {
-
-// Returns the amount of time since the user last interacted with the computer,
-// in milliseconds
-int UserIdleTime() {
-#ifdef OS_WIN
- LASTINPUTINFO last_input_info;
- last_input_info.cbSize = sizeof(LASTINPUTINFO);
-
- // Get time in windows ticks since system start of last activity.
- BOOL b = ::GetLastInputInfo(&last_input_info);
- if (b == TRUE)
- return ::GetTickCount() - last_input_info.dwTime;
-#elif defined(OS_MACOSX)
- // It would be great to do something like:
- //
- // return 1000 *
- // CGEventSourceSecondsSinceLastEventType(
- // kCGEventSourceStateCombinedSessionState,
- // kCGAnyInputEventType);
- //
- // Unfortunately, CGEvent* lives in ApplicationServices, and we're a daemon
- // and can't link that high up the food chain. Thus this mucking in IOKit.
-
- io_service_t hid_service =
- IOServiceGetMatchingService(kIOMasterPortDefault,
- IOServiceMatching("IOHIDSystem"));
- if (!hid_service) {
- LOG(WARNING) << "Could not obtain IOHIDSystem";
- return 0;
- }
-
- CFTypeRef object = IORegistryEntryCreateCFProperty(hid_service,
- CFSTR("HIDIdleTime"),
- kCFAllocatorDefault,
- 0);
- if (!object) {
- LOG(WARNING) << "Could not get IOHIDSystem's HIDIdleTime property";
- IOObjectRelease(hid_service);
- return 0;
- }
-
- int64 idle_time; // in nanoseconds
- Boolean success;
- if (CFGetTypeID(object) == CFNumberGetTypeID()) {
- success = CFNumberGetValue((CFNumberRef)object,
- kCFNumberSInt64Type,
- &idle_time);
- } else {
- LOG(WARNING) << "IOHIDSystem's HIDIdleTime property isn't a number!";
- }
-
- CFRelease(object);
- IOObjectRelease(hid_service);
-
- if (!success) {
- LOG(WARNING) << "Could not get IOHIDSystem's HIDIdleTime property's value";
- return 0;
- } else {
- return idle_time / 1000000; // nano to milli
- }
-#else
- static bool was_logged = false;
- if (!was_logged) {
- was_logged = true;
- LOG(INFO) << "UserIdleTime unimplemented on this platform, "
- "synchronization will not throttle when user idle";
- }
-#endif
-
- return 0;
-}
-
-} // namespace
-
-namespace browser_sync {
-
-SyncerThreadPthreads::SyncerThreadPthreads(
- ClientCommandChannel* command_channel,
- syncable::DirectoryManager* mgr,
- ServerConnectionManager* connection_manager,
- AllStatus* all_status, ModelSafeWorker* model_safe_worker)
- : SyncerThread() {
- impl_.reset(new SyncerThreadPthreadImpl(command_channel, mgr,
- connection_manager, all_status, model_safe_worker));
-}
-
-bool SyncerThreadPthreadImpl::NudgeSyncer(int milliseconds_from_now,
- SyncerThread::NudgeSource source) {
- MutexLock lock(&mutex_);
- if (syncer_ == NULL) {
- return false;
- }
- NudgeSyncImpl(milliseconds_from_now, source);
- return true;
-}
-
-void* RunSyncerThread(void* syncer_thread) {
- return (reinterpret_cast<SyncerThreadPthreadImpl*>(
- syncer_thread))->ThreadMain();
-}
-
-SyncerThreadPthreadImpl::SyncerThreadPthreadImpl(
- ClientCommandChannel* command_channel,
- syncable::DirectoryManager* mgr,
- ServerConnectionManager* connection_manager,
- AllStatus* all_status,
- ModelSafeWorker* model_safe_worker)
- : dirman_(mgr), scm_(connection_manager),
- syncer_(NULL), syncer_events_(NULL), thread_running_(false),
- syncer_short_poll_interval_seconds_(
- SyncerThread::kDefaultShortPollIntervalSeconds),
- syncer_long_poll_interval_seconds_(
- SyncerThread::kDefaultLongPollIntervalSeconds),
- syncer_polling_interval_(SyncerThread::kDefaultShortPollIntervalSeconds),
- syncer_max_interval_(SyncerThread::kDefaultMaxPollIntervalMs),
- stop_syncer_thread_(false), connected_(false), conn_mgr_hookup_(NULL),
- p2p_authenticated_(false), p2p_subscribed_(false),
- allstatus_(all_status), talk_mediator_hookup_(NULL),
- command_channel_(command_channel), directory_manager_hookup_(NULL),
- model_safe_worker_(model_safe_worker),
- client_command_hookup_(NULL), disable_idle_detection_(false) {
-
- SyncerEvent shutdown = { SyncerEvent::SHUTDOWN_USE_WITH_CARE };
- syncer_event_channel_.reset(new SyncerEventChannel(shutdown));
-
- if (dirman_) {
- directory_manager_hookup_.reset(NewEventListenerHookup(
- dirman_->channel(), this,
- &SyncerThreadPthreadImpl::HandleDirectoryManagerEvent));
- }
-
- if (scm_) {
- WatchConnectionManager(scm_);
- }
-
- if (command_channel_) {
- WatchClientCommands(command_channel_);
- }
-}
-
-SyncerThreadPthreadImpl::~SyncerThreadPthreadImpl() {
- client_command_hookup_.reset();
- conn_mgr_hookup_.reset();
- syncer_event_channel_.reset();
- directory_manager_hookup_.reset();
- syncer_events_.reset();
- delete syncer_;
- talk_mediator_hookup_.reset();
- CHECK(!thread_running_);
-}
-
-// Creates and starts a syncer thread.
-// Returns true if it creates a thread or if there's currently a thread running
-// and false otherwise.
-bool SyncerThreadPthreadImpl::Start() {
- MutexLock lock(&mutex_);
- if (thread_running_) {
- return true;
- }
- thread_running_ =
- (0 == pthread_create(&thread_, NULL, RunSyncerThread, this));
- if (thread_running_) {
- pthread_detach(thread_);
- }
- return thread_running_;
-}
-
-// Stop processing. A max wait of at least 2*server RTT time is recommended.
-// Returns true if we stopped, false otherwise.
-bool SyncerThreadPthreadImpl::Stop(int max_wait) {
- MutexLock lock(&mutex_);
- if (!thread_running_)
- return true;
- stop_syncer_thread_ = true;
- if (NULL != syncer_) {
- // Try to early exit the syncer.
- syncer_->RequestEarlyExit();
- }
- pthread_cond_broadcast(&changed_.condvar_);
- timespec deadline = { time(NULL) + (max_wait / 1000), 0 };
- do {
- const int wait_result = max_wait < 0 ?
- pthread_cond_wait(&changed_.condvar_, &mutex_.mutex_) :
- pthread_cond_timedwait(&changed_.condvar_, &mutex_.mutex_,
- &deadline);
- if (ETIMEDOUT == wait_result) {
- LOG(ERROR) << "SyncerThread::Stop timed out. Problems likely.";
- return false;
- }
- } while (thread_running_);
- return true;
-}
-
-void SyncerThreadPthreadImpl::WatchClientCommands(
- ClientCommandChannel* channel) {
- PThreadScopedLock<PThreadMutex> lock(&mutex_);
- client_command_hookup_.reset(NewEventListenerHookup(channel, this,
- &SyncerThreadPthreadImpl::HandleClientCommand));
-}
-
-void SyncerThreadPthreadImpl::HandleClientCommand(
- ClientCommandChannel::EventType event) {
- if (!event) {
- return;
- }
-
- // Mutex not really necessary for these.
- if (event->has_set_sync_poll_interval()) {
- syncer_short_poll_interval_seconds_ = event->set_sync_poll_interval();
- }
-
- if (event->has_set_sync_long_poll_interval()) {
- syncer_long_poll_interval_seconds_ = event->set_sync_long_poll_interval();
- }
-}
-
-void SyncerThreadPthreadImpl::ThreadMainLoop() {
- // Use the short poll value by default.
- int poll_seconds = syncer_short_poll_interval_seconds_;
- int user_idle_milliseconds = 0;
- timespec last_sync_time = { 0 };
- bool initial_sync_for_thread = true;
- bool continue_sync_cycle = false;
-
- while (!stop_syncer_thread_) {
- if (!connected_) {
- LOG(INFO) << "Syncer thread waiting for connection.";
- while (!connected_ && !stop_syncer_thread_)
- pthread_cond_wait(&changed_.condvar_, &mutex_.mutex_);
- LOG_IF(INFO, connected_) << "Syncer thread found connection.";
- continue;
- }
-
- if (syncer_ == NULL) {
- LOG(INFO) << "Syncer thread waiting for database initialization.";
- while (syncer_ == NULL && !stop_syncer_thread_)
- pthread_cond_wait(&changed_.condvar_, &mutex_.mutex_);
- LOG_IF(INFO, !(syncer_ == NULL)) << "Syncer was found after DB started.";
- continue;
- }
-
- timespec const next_poll = { last_sync_time.tv_sec + poll_seconds,
- last_sync_time.tv_nsec };
- const timespec wake_time =
- !nudge_queue_.empty() && nudge_queue_.top().first < next_poll ?
- nudge_queue_.top().first : next_poll;
- LOG(INFO) << "wake time is " << wake_time.tv_sec;
- LOG(INFO) << "next poll is " << next_poll.tv_sec;
-
- const int error = pthread_cond_timedwait(&changed_.condvar_, &mutex_.mutex_,
- &wake_time);
- if (ETIMEDOUT != error) {
- continue; // Check all the conditions again.
- }
-
- const timespec now = GetPThreadAbsoluteTime(0);
-
- // Handle a nudge, caused by either a notification or a local bookmark
- // event. This will also update the source of the following SyncMain call.
- UpdateNudgeSource(now, &continue_sync_cycle, &initial_sync_for_thread);
-
- LOG(INFO) << "Calling Sync Main at time " << now.tv_sec;
- SyncMain(syncer_);
- last_sync_time = now;
-
- LOG(INFO) << "Updating the next polling time after SyncMain";
- poll_seconds = CalculatePollingWaitTime(allstatus_->status(),
- poll_seconds,
- &user_idle_milliseconds,
- &continue_sync_cycle);
- }
-}
-
-// We check how long the user's been idle and sync less often if the machine is
-// not in use. The aim is to reduce server load.
-int SyncerThreadPthreadImpl::CalculatePollingWaitTime(
- const AllStatus::Status& status,
- int last_poll_wait, // in s
- int* user_idle_milliseconds,
- bool* continue_sync_cycle) {
- bool is_continuing_sync_cyle = *continue_sync_cycle;
- *continue_sync_cycle = false;
-
- // Determine if the syncer has unfinished work to do from allstatus_.
- const bool syncer_has_work_to_do =
- status.updates_available > status.updates_received
- || status.unsynced_count > 0;
- LOG(INFO) << "syncer_has_work_to_do is " << syncer_has_work_to_do;
-
- // First calculate the expected wait time, figuring in any backoff because of
- // user idle time. next_wait is in seconds
- syncer_polling_interval_ = (!status.notifications_enabled) ?
- syncer_short_poll_interval_seconds_ :
- syncer_long_poll_interval_seconds_;
- int default_next_wait = syncer_polling_interval_;
- int actual_next_wait = default_next_wait;
-
- if (syncer_has_work_to_do) {
- // Provide exponential backoff due to consecutive errors, else attempt to
- // complete the work as soon as possible.
- if (!is_continuing_sync_cyle) {
- actual_next_wait = AllStatus::GetRecommendedDelaySeconds(0);
- } else {
- actual_next_wait = AllStatus::GetRecommendedDelaySeconds(last_poll_wait);
- }
- *continue_sync_cycle = true;
- } else if (!status.notifications_enabled) {
- // Ensure that we start exponential backoff from our base polling
- // interval when we are not continuing a sync cycle.
- last_poll_wait = std::max(last_poll_wait, syncer_polling_interval_);
-
- // Did the user start interacting with the computer again?
- // If so, revise our idle time (and probably next_sync_time) downwards
- int new_idle_time = disable_idle_detection_ ? 0 : UserIdleTime();
- if (new_idle_time < *user_idle_milliseconds) {
- *user_idle_milliseconds = new_idle_time;
- }
- actual_next_wait = CalculateSyncWaitTime(last_poll_wait * 1000,
- *user_idle_milliseconds) / 1000;
- DCHECK_GE(actual_next_wait, default_next_wait);
- }
-
- LOG(INFO) << "Sync wait: idle " << default_next_wait
- << " non-idle or backoff " << actual_next_wait << ".";
-
- return actual_next_wait;
-}
-
-void* SyncerThreadPthreadImpl::ThreadMain() {
- NameCurrentThreadForDebugging("SyncEngine_SyncerThread");
- mutex_.Lock();
- ThreadMainLoop();
- thread_running_ = false;
- pthread_cond_broadcast(&changed_.condvar_);
- mutex_.Unlock();
- LOG(INFO) << "Syncer thread exiting.";
- return 0;
-}
-
-void SyncerThreadPthreadImpl::SyncMain(Syncer* syncer) {
- CHECK(syncer);
- mutex_.Unlock();
- while (syncer->SyncShare()) {
- LOG(INFO) << "Looping in sync share";
- }
- LOG(INFO) << "Done looping in sync share";
-
- mutex_.Lock();
-}
-
-void SyncerThreadPthreadImpl::UpdateNudgeSource(const timespec& now,
- bool* continue_sync_cycle,
- bool* initial_sync) {
- bool nudged = false;
- SyncerThread::NudgeSource nudge_source = SyncerThread::kUnknown;
- // Has the previous sync cycle completed?
- if (continue_sync_cycle) {
- nudge_source = SyncerThread::kContinuation;
- }
- // Update the nudge source if a new nudge has come through during the
- // previous sync cycle.
- while (!nudge_queue_.empty() && !(now < nudge_queue_.top().first)) {
- if (!nudged) {
- nudge_source = nudge_queue_.top().second;
- *continue_sync_cycle = false; // Reset the continuation token on nudge.
- nudged = true;
- }
- nudge_queue_.pop();
- }
- SetUpdatesSource(nudged, nudge_source, initial_sync);
-}
-
-void SyncerThreadPthreadImpl::SetUpdatesSource(bool nudged,
- SyncerThread::NudgeSource nudge_source, bool* initial_sync) {
- sync_pb::GetUpdatesCallerInfo::GET_UPDATES_SOURCE updates_source =
- sync_pb::GetUpdatesCallerInfo::UNKNOWN;
- if (*initial_sync) {
- updates_source = sync_pb::GetUpdatesCallerInfo::FIRST_UPDATE;
- *initial_sync = false;
- } else if (!nudged) {
- updates_source = sync_pb::GetUpdatesCallerInfo::PERIODIC;
- } else {
- switch (nudge_source) {
- case SyncerThread::kNotification:
- updates_source = sync_pb::GetUpdatesCallerInfo::NOTIFICATION;
- break;
- case SyncerThread::kLocal:
- updates_source = sync_pb::GetUpdatesCallerInfo::LOCAL;
- break;
- case SyncerThread::kContinuation:
- updates_source = sync_pb::GetUpdatesCallerInfo::SYNC_CYCLE_CONTINUATION;
- break;
- case SyncerThread::kUnknown:
- default:
- updates_source = sync_pb::GetUpdatesCallerInfo::UNKNOWN;
- break;
- }
- }
- syncer_->set_updates_source(updates_source);
-}
-
-void SyncerThreadPthreadImpl::HandleSyncerEvent(const SyncerEvent& event) {
- MutexLock lock(&mutex_);
- channel()->NotifyListeners(event);
- if (SyncerEvent::REQUEST_SYNC_NUDGE != event.what_happened) {
- return;
- }
- NudgeSyncImpl(event.nudge_delay_milliseconds, SyncerThread::kUnknown);
-}
-
-void SyncerThreadPthreadImpl::HandleDirectoryManagerEvent(
- const syncable::DirectoryManagerEvent& event) {
- LOG(INFO) << "Handling a directory manager event";
- if (syncable::DirectoryManagerEvent::OPENED == event.what_happened) {
- MutexLock lock(&mutex_);
- LOG(INFO) << "Syncer starting up for: " << event.dirname;
- // The underlying database structure is ready, and we should create
- // the syncer.
- CHECK(syncer_ == NULL);
- syncer_ =
- new Syncer(dirman_, event.dirname, scm_, model_safe_worker_.get());
-
- syncer_->set_command_channel(command_channel_);
- syncer_events_.reset(NewEventListenerHookup(
- syncer_->channel(), this, &SyncerThreadPthreadImpl::HandleSyncerEvent));
- pthread_cond_broadcast(&changed_.condvar_);
- }
-}
-
-static inline void CheckConnected(bool* connected,
- HttpResponse::ServerConnectionCode code,
- pthread_cond_t* condvar) {
- if (*connected) {
- if (HttpResponse::CONNECTION_UNAVAILABLE == code) {
- *connected = false;
- pthread_cond_broadcast(condvar);
- }
- } else {
- if (HttpResponse::SERVER_CONNECTION_OK == code) {
- *connected = true;
- pthread_cond_broadcast(condvar);
- }
- }
-}
-
-void SyncerThreadPthreadImpl::WatchConnectionManager(
- ServerConnectionManager* conn_mgr) {
- conn_mgr_hookup_.reset(NewEventListenerHookup(conn_mgr->channel(), this,
- &SyncerThreadPthreadImpl::HandleServerConnectionEvent));
- CheckConnected(&connected_, conn_mgr->server_status(),
- &changed_.condvar_);
-}
-
-void SyncerThreadPthreadImpl::HandleServerConnectionEvent(
- const ServerConnectionEvent& event) {
- if (ServerConnectionEvent::STATUS_CHANGED == event.what_happened) {
- MutexLock lock(&mutex_);
- CheckConnected(&connected_, event.connection_code,
- &changed_.condvar_);
- }
-}
-
-SyncerEventChannel* SyncerThreadPthreadImpl::channel() {
- return syncer_event_channel_.get();
-}
-
-// Inputs and return value in milliseconds.
-int SyncerThreadPthreadImpl::CalculateSyncWaitTime(int last_interval,
- int user_idle_ms) {
- // syncer_polling_interval_ is in seconds
- int syncer_polling_interval_ms = syncer_polling_interval_ * 1000;
-
- // This is our default and lower bound.
- int next_wait = syncer_polling_interval_ms;
-
- // Get idle time, bounded by max wait.
- int idle = min(user_idle_ms, syncer_max_interval_);
-
- // If the user has been idle for a while, we'll start decreasing the poll
- // rate.
- if (idle >= kPollBackoffThresholdMultiplier * syncer_polling_interval_ms) {
- next_wait = std::min(AllStatus::GetRecommendedDelaySeconds(
- last_interval / 1000), syncer_max_interval_ / 1000) * 1000;
- }
-
- return next_wait;
-}
-
-// Called with mutex_ already locked.
-void SyncerThreadPthreadImpl::NudgeSyncImpl(int milliseconds_from_now,
- SyncerThread::NudgeSource source) {
- const timespec nudge_time = GetPThreadAbsoluteTime(milliseconds_from_now);
- NudgeObject nudge_object(nudge_time, source);
- nudge_queue_.push(nudge_object);
- pthread_cond_broadcast(&changed_.condvar_);
-}
-
-void SyncerThreadPthreadImpl::WatchTalkMediator(TalkMediator* mediator) {
- talk_mediator_hookup_.reset(
- NewEventListenerHookup(
- mediator->channel(),
- this,
- &SyncerThreadPthreadImpl::HandleTalkMediatorEvent));
-}
-
-void SyncerThreadPthreadImpl::HandleTalkMediatorEvent(
- const TalkMediatorEvent& event) {
- MutexLock lock(&mutex_);
- switch (event.what_happened) {
- case TalkMediatorEvent::LOGIN_SUCCEEDED:
- LOG(INFO) << "P2P: Login succeeded.";
- p2p_authenticated_ = true;
- break;
- case TalkMediatorEvent::LOGOUT_SUCCEEDED:
- LOG(INFO) << "P2P: Login succeeded.";
- p2p_authenticated_ = false;
- break;
- case TalkMediatorEvent::SUBSCRIPTIONS_ON:
- LOG(INFO) << "P2P: Subscriptions successfully enabled.";
- p2p_subscribed_ = true;
- if (NULL != syncer_) {
- LOG(INFO) << "Subscriptions on. Nudging syncer for initial push.";
- NudgeSyncImpl(0, SyncerThread::kLocal);
- }
- break;
- case TalkMediatorEvent::SUBSCRIPTIONS_OFF:
- LOG(INFO) << "P2P: Subscriptions are not enabled.";
- p2p_subscribed_ = false;
- break;
- case TalkMediatorEvent::NOTIFICATION_RECEIVED:
- LOG(INFO) << "P2P: Updates on server, pushing syncer";
- if (NULL != syncer_) {
- NudgeSyncImpl(0, SyncerThread::kNotification);
- }
- break;
- default:
- break;
- }
-
- if (NULL != syncer_) {
- syncer_->set_notifications_enabled(p2p_authenticated_ && p2p_subscribed_);
- }
-}
-
-} // namespace browser_sync
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