chromeos: Block system suspend while uploading files to Drive

content/browser/power_save_blocker_mac.cc

 // Copyright (c) 2012 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 "content/browser/power_save_blocker.h"
+#include "content/public/browser/power_save_blocker.h"
 
 #include <IOKit/pwr_mgt/IOPMLib.h>
 
 #include "base/bind.h"
 #include "base/lazy_instance.h"
 #include "base/mac/scoped_cftyperef.h"
 #include "base/sys_string_conversions.h"
 #include "base/threading/platform_thread.h"
 #include "base/threading/thread.h"
 
@@ skipping 11 matching lines @@
   static base::Thread* New(void* instance) {
     base::Thread* thread = new (instance) base::Thread("PowerSaveBlocker");
     thread->Start();
     return thread;
   }
   static void Delete(base::Thread* instance) { }
 };
 base::LazyInstance<base::Thread, PowerSaveBlockerLazyInstanceTraits>
     g_power_thread = LAZY_INSTANCE_INITIALIZER;
 
-}  // namespace
+class PowerSaveBlockerMac : public PowerSaveBlocker {
+ public:
+  PowerSaveBlockerMac(PowerSaveBlockerType type, const std::string& reason);
+  virtual ~PowerSaveBlockerMac();
 
-class PowerSaveBlocker::Delegate
-    : public base::RefCountedThreadSafe<PowerSaveBlocker::Delegate> {
+ private:
+  class Delegate;
+
+  // A second object with different lifetime than the RAII container.
+  scoped_refptr<Delegate> delegate_;
+
+  DISALLOW_COPY_AND_ASSIGN(PowerSaveBlockerMac);
+};
+
+class PowerSaveBlockerMac::Delegate
+    : public base::RefCountedThreadSafe<PowerSaveBlockerMac::Delegate> {
  public:
   Delegate(PowerSaveBlockerType type, const std::string& reason)
       : type_(type), reason_(reason), assertion_(kIOPMNullAssertionID) {}
 
   // Does the actual work to apply or remove the desired power save block.
   void ApplyBlock();
   void RemoveBlock();
 
  private:
   friend class base::RefCountedThreadSafe<Delegate>;
   ~Delegate() {}
   PowerSaveBlockerType type_;
   std::string reason_;
   IOPMAssertionID assertion_;
 };
 
-void PowerSaveBlocker::Delegate::ApplyBlock() {
+void PowerSaveBlockerMac::Delegate::ApplyBlock() {
   DCHECK_EQ(base::PlatformThread::CurrentId(),
             g_power_thread.Pointer()->thread_id());
 
   CFStringRef level = NULL;
   // See QA1340 <http://developer.apple.com/library/mac/#qa/qa1340/> for more
   // details.
   switch (type_) {
     case PowerSaveBlocker::kPowerSaveBlockPreventAppSuspension:
       level = kIOPMAssertionTypeNoIdleSleep;
       break;
     case PowerSaveBlocker::kPowerSaveBlockPreventDisplaySleep:
       level = kIOPMAssertionTypeNoDisplaySleep;
       break;
     default:
       NOTREACHED();
       break;
   }
   if (level) {
     base::mac::ScopedCFTypeRef<CFStringRef> cf_reason(
         base::SysUTF8ToCFStringRef(reason_));
     IOReturn result = IOPMAssertionCreateWithName(level,
                                                   kIOPMAssertionLevelOn,
                                                   cf_reason,
                                                   &assertion_);
     LOG_IF(ERROR, result != kIOReturnSuccess)
         << "IOPMAssertionCreate: " << result;
   }
 }
 
-void PowerSaveBlocker::Delegate::RemoveBlock() {
+void PowerSaveBlockerMac::Delegate::RemoveBlock() {
   DCHECK_EQ(base::PlatformThread::CurrentId(),
             g_power_thread.Pointer()->thread_id());
 
   if (assertion_ != kIOPMNullAssertionID) {
     IOReturn result = IOPMAssertionRelease(assertion_);
     LOG_IF(ERROR, result != kIOReturnSuccess)
         << "IOPMAssertionRelease: " << result;
   }
 }
 
-PowerSaveBlocker::PowerSaveBlocker(PowerSaveBlockerType type,
-                                   const std::string& reason)
+PowerSaveBlockerMac::PowerSaveBlockerMac(PowerSaveBlockerType type,
+                                         const std::string& reason)
     : delegate_(new Delegate(type, reason)) {
   g_power_thread.Pointer()->message_loop()->PostTask(
       FROM_HERE,
       base::Bind(&Delegate::ApplyBlock, delegate_));
 }
 
-PowerSaveBlocker::~PowerSaveBlocker() {
+PowerSaveBlockerMac::~PowerSaveBlockerMac() {
   g_power_thread.Pointer()->message_loop()->PostTask(
       FROM_HERE,
       base::Bind(&Delegate::RemoveBlock, delegate_));
 }
 
+}  // namespace
+
+// static
+scoped_ptr<PowerSaveBlocker> PowerSaveBlocker::Create(
+    PowerSaveBlockerType type,
+    const std::string& reason) {
+  return scoped_ptr<PowerSaveBlocker>(new PowerSaveBlockerMac(type, reason));
+}
+
 }  // namespace content