chrome/browser/sync/glue/browser_thread_model_worker.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 "chrome/browser/sync/glue/browser_thread_model_worker.h"
   6
   7 #include "base/bind.h"
   8 #include "base/synchronization/waitable_event.h"
   9 #include "content/public/browser/browser_thread.h"
  10
  11 using base::WaitableEvent;
  12 using content::BrowserThread;
  13
  14 namespace browser_sync {
  15
  16 BrowserThreadModelWorker::BrowserThreadModelWorker(
  17     BrowserThread::ID thread, syncer::ModelSafeGroup group,
  18     syncer::WorkerLoopDestructionObserver* observer)
  19     : ModelSafeWorker(observer),
  20       thread_(thread), group_(group) {
  21 }
  22
  23 syncer::SyncerError BrowserThreadModelWorker::DoWorkAndWaitUntilDoneImpl(
  24     const syncer::WorkCallback& work) {
  25   syncer::SyncerError error = syncer::UNSET;
  26   if (BrowserThread::CurrentlyOn(thread_)) {
  27     DLOG(WARNING) << "Already on thread " << thread_;
  28     return work.Run();
  29   }
  30
  31   if (!BrowserThread::PostTask(
  32       thread_,
  33       FROM_HERE,
  34       base::Bind(&BrowserThreadModelWorker::CallDoWorkAndSignalTask,
  35                  this, work,
  36                  work_done_or_stopped(), &error))) {
  37     DLOG(WARNING) << "Failed to post task to thread " << thread_;
  38     error = syncer::CANNOT_DO_WORK;
  39     return error;
  40   }
  41   work_done_or_stopped()->Wait();
  42   return error;
  43 }
  44
  45 syncer::ModelSafeGroup BrowserThreadModelWorker::GetModelSafeGroup() {
  46   return group_;
  47 }
  48
  49 BrowserThreadModelWorker::~BrowserThreadModelWorker() {}
  50
  51 void BrowserThreadModelWorker::RegisterForLoopDestruction() {
  52   if (BrowserThread::CurrentlyOn(thread_)) {
  53     base::MessageLoop::current()->AddDestructionObserver(this);
  54     SetWorkingLoopToCurrent();
  55   } else {
  56     BrowserThread::PostTask(
  57         thread_, FROM_HERE,
  58         Bind(&BrowserThreadModelWorker::RegisterForLoopDestruction, this));
  59   }
  60 }
  61
  62 void BrowserThreadModelWorker::CallDoWorkAndSignalTask(
  63     const syncer::WorkCallback& work,
  64     WaitableEvent* done,
  65     syncer::SyncerError* error) {
  66   DCHECK(BrowserThread::CurrentlyOn(thread_));
  67   if (!IsStopped())
  68     *error = work.Run();
  69   done->Signal();
  70 }
  71
  72 DatabaseModelWorker::DatabaseModelWorker(
  73     syncer::WorkerLoopDestructionObserver* observer)
  74     : BrowserThreadModelWorker(BrowserThread::DB, syncer::GROUP_DB, observer) {
  75 }
  76
  77 void DatabaseModelWorker::CallDoWorkAndSignalTask(
  78     const syncer::WorkCallback& work,
  79     WaitableEvent* done,
  80     syncer::SyncerError* error) {
  81   BrowserThreadModelWorker::CallDoWorkAndSignalTask(work, done, error);
  82 }
  83
  84 DatabaseModelWorker::~DatabaseModelWorker() {}
  85
  86 FileModelWorker::FileModelWorker(
  87     syncer::WorkerLoopDestructionObserver* observer)
  88     : BrowserThreadModelWorker(BrowserThread::FILE, syncer::GROUP_FILE,
  89                                observer) {
  90 }
  91
  92 void FileModelWorker::CallDoWorkAndSignalTask(
  93     const syncer::WorkCallback& work,
  94     WaitableEvent* done,
  95     syncer::SyncerError* error) {
  96   BrowserThreadModelWorker::CallDoWorkAndSignalTask(work, done, error);
  97 }
  98
  99 FileModelWorker::~FileModelWorker() {}
 100
 101 }  // namespace browser_sync