android_webview/browser/gl_view_renderer_manager.cc

   1 // Copyright 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 "android_webview/browser/gl_view_renderer_manager.h"
   6
   7 #include "base/logging.h"
   8 #include "base/threading/platform_thread.h"
   9
  10 namespace android_webview {
  11
  12 using base::AutoLock;
  13
  14 namespace {
  15 base::LazyInstance<GLViewRendererManager>::Leaky g_view_renderer_manager =
  16     LAZY_INSTANCE_INITIALIZER;
  17 }  // namespace
  18
  19 // static
  20 GLViewRendererManager* GLViewRendererManager::GetInstance() {
  21   return g_view_renderer_manager.Pointer();
  22 }
  23
  24 GLViewRendererManager::GLViewRendererManager() {}
  25
  26 GLViewRendererManager::~GLViewRendererManager() {}
  27
  28 GLViewRendererManager::Key GLViewRendererManager::NullKey() {
  29   AutoLock auto_lock(lock_);
  30   return mru_list_.end();
  31 }
  32
  33 GLViewRendererManager::Key GLViewRendererManager::PushBack(RendererType view) {
  34   AutoLock auto_lock(lock_);
  35   DCHECK(mru_list_.end() ==
  36          std::find(mru_list_.begin(), mru_list_.end(), view));
  37   mru_list_.push_back(view);
  38   Key back = mru_list_.end();
  39   back--;
  40   return back;
  41 }
  42
  43 void GLViewRendererManager::DidDrawGL(Key key) {
  44   AutoLock auto_lock(lock_);
  45   DCHECK(mru_list_.end() != key);
  46   mru_list_.splice(mru_list_.begin(), mru_list_, key);
  47 }
  48
  49 void GLViewRendererManager::Remove(Key key) {
  50   AutoLock auto_lock(lock_);
  51   DCHECK(mru_list_.end() != key);
  52   mru_list_.erase(key);
  53 }
  54
  55 GLViewRendererManager::RendererType
  56 GLViewRendererManager::GetMostRecentlyDrawn() const {
  57   AutoLock auto_lock(lock_);
  58   if (mru_list_.begin() == mru_list_.end())
  59     return NULL;
  60   return *mru_list_.begin();
  61 }
  62
  63 }  // namespace android_webview