content/browser/streams/stream_context.cc

   1 // Copyright (c) 2013 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 "content/browser/streams/stream_context.h"
   6
   7 #include "base/bind.h"
   8 #include "content/browser/streams/stream_registry.h"
   9 #include "content/public/browser/browser_context.h"
  10 #include "content/public/browser/browser_thread.h"
  11
  12 using base::UserDataAdapter;
  13
  14 namespace {
  15 const char* kStreamContextKeyName = "content_stream_context";
  16 }
  17
  18 namespace content {
  19
  20 StreamContext::StreamContext() {}
  21
  22 StreamContext* StreamContext::GetFor(BrowserContext* context) {
  23   if (!context->GetUserData(kStreamContextKeyName)) {
  24     scoped_refptr<StreamContext> stream = new StreamContext();
  25     context->SetUserData(kStreamContextKeyName,
  26                          new UserDataAdapter<StreamContext>(stream.get()));
  27     // Check first to avoid memory leak in unittests.
  28     if (BrowserThread::IsMessageLoopValid(BrowserThread::IO)) {
  29       BrowserThread::PostTask(
  30           BrowserThread::IO, FROM_HERE,
  31           base::Bind(&StreamContext::InitializeOnIOThread, stream));
  32     }
  33   }
  34
  35   return UserDataAdapter<StreamContext>::Get(context, kStreamContextKeyName);
  36 }
  37
  38 void StreamContext::InitializeOnIOThread() {
  39   DCHECK_CURRENTLY_ON(BrowserThread::IO);
  40   registry_.reset(new StreamRegistry());
  41 }
  42
  43 StreamContext::~StreamContext() {}
  44
  45 void StreamContext::DeleteOnCorrectThread() const {
  46   // In many tests, there isn't a valid IO thread.  In that case, just delete on
  47   // the current thread.
  48   // TODO(zork): Remove this custom deleter, and fix the leaks in all the
  49   // tests.
  50   if (BrowserThread::IsMessageLoopValid(BrowserThread::IO) &&
  51       !BrowserThread::CurrentlyOn(BrowserThread::IO)) {
  52     BrowserThread::DeleteSoon(BrowserThread::IO, FROM_HERE, this);
  53     return;
  54   }
  55   delete this;
  56 }
  57
  58 }  // namespace content