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      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 "base/command_line.h"
      6 #include "base/debug/trace_event.h"
      7 #include "base/logging.h"
      8 #include "ui/ozone/ozone_platform.h"
      9 #include "ui/ozone/ozone_switches.h"
     10 #include "ui/ozone/platform_object.h"
     11 #include "ui/ozone/platform_selection.h"
     12 
     13 namespace ui {
     14 
     15 namespace {
     16 
     17 bool g_platform_initialized_ui = false;
     18 bool g_platform_initialized_gpu = false;
     19 
     20 }
     21 
     22 OzonePlatform::OzonePlatform() {
     23   CHECK(!instance_) << "There should only be a single OzonePlatform.";
     24   instance_ = this;
     25   g_platform_initialized_ui = false;
     26   g_platform_initialized_gpu = false;
     27 }
     28 
     29 OzonePlatform::~OzonePlatform() {
     30   CHECK_EQ(instance_, this);
     31   instance_ = NULL;
     32 }
     33 
     34 // static
     35 void OzonePlatform::InitializeForUI() {
     36   CreateInstance();
     37   if (g_platform_initialized_ui)
     38     return;
     39   g_platform_initialized_ui = true;
     40   instance_->InitializeUI();
     41 }
     42 
     43 // static
     44 void OzonePlatform::InitializeForGPU() {
     45   CreateInstance();
     46   if (g_platform_initialized_gpu)
     47     return;
     48   g_platform_initialized_gpu = true;
     49   instance_->InitializeGPU();
     50 }
     51 
     52 // static
     53 OzonePlatform* OzonePlatform::GetInstance() {
     54   CHECK(instance_) << "OzonePlatform is not initialized";
     55   return instance_;
     56 }
     57 
     58 // static
     59 void OzonePlatform::CreateInstance() {
     60   if (!instance_) {
     61     TRACE_EVENT1("ozone",
     62                  "OzonePlatform::Initialize",
     63                  "platform",
     64                  GetOzonePlatformName());
     65     scoped_ptr<OzonePlatform> platform =
     66         PlatformObject<OzonePlatform>::Create();
     67 
     68     // TODO(spang): Currently need to leak this object.
     69     CHECK_EQ(instance_, platform.release());
     70   }
     71 }
     72 
     73 // static
     74 OzonePlatform* OzonePlatform::instance_;
     75 
     76 }  // namespace ui
     77