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| 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 "content/browser/power_save_blocker_impl.h" | |
| 6 | |
| 7 #include <IOKit/pwr_mgt/IOPMLib.h> | |
| 8 | |
| 9 #include "base/bind.h" | |
| 10 #include "base/lazy_instance.h" | |
| 11 #include "base/mac/scoped_cftyperef.h" | |
| 12 #include "base/strings/sys_string_conversions.h" | |
| 13 #include "base/threading/platform_thread.h" | |
| 14 #include "base/threading/thread.h" | |
| 15 | |
| 16 namespace content { | |
| 17 namespace { | |
| 18 | |
| 19 // Power management cannot be done on the UI thread. IOPMAssertionCreate does a | |
| 20 // synchronous MIG call to configd, so if it is called on the main thread the UI | |
| 21 // is at the mercy of another process. See http://crbug.com/79559 and | |
| 22 // http://www.opensource.apple.com/source/IOKitUser/IOKitUser-514.16.31/pwr_mgt.
subproj/IOPMLibPrivate.c . | |
| 23 struct PowerSaveBlockerLazyInstanceTraits { | |
| 24 static const bool kRegisterOnExit = false; | |
| 25 #ifndef NDEBUG | |
| 26 static const bool kAllowedToAccessOnNonjoinableThread = true; | |
| 27 #endif | |
| 28 | |
| 29 static base::Thread* New(void* instance) { | |
| 30 base::Thread* thread = new (instance) base::Thread("PowerSaveBlocker"); | |
| 31 thread->Start(); | |
| 32 return thread; | |
| 33 } | |
| 34 static void Delete(base::Thread* instance) { } | |
| 35 }; | |
| 36 base::LazyInstance<base::Thread, PowerSaveBlockerLazyInstanceTraits> | |
| 37 g_power_thread = LAZY_INSTANCE_INITIALIZER; | |
| 38 | |
| 39 } // namespace | |
| 40 | |
| 41 class PowerSaveBlockerImpl::Delegate | |
| 42 : public base::RefCountedThreadSafe<PowerSaveBlockerImpl::Delegate> { | |
| 43 public: | |
| 44 Delegate(PowerSaveBlockerType type, const std::string& description) | |
| 45 : type_(type), | |
| 46 description_(description), | |
| 47 assertion_(kIOPMNullAssertionID) {} | |
| 48 | |
| 49 // Does the actual work to apply or remove the desired power save block. | |
| 50 void ApplyBlock(); | |
| 51 void RemoveBlock(); | |
| 52 | |
| 53 private: | |
| 54 friend class base::RefCountedThreadSafe<Delegate>; | |
| 55 ~Delegate() {} | |
| 56 PowerSaveBlockerType type_; | |
| 57 std::string description_; | |
| 58 IOPMAssertionID assertion_; | |
| 59 }; | |
| 60 | |
| 61 void PowerSaveBlockerImpl::Delegate::ApplyBlock() { | |
| 62 DCHECK_EQ(base::PlatformThread::CurrentId(), | |
| 63 g_power_thread.Pointer()->GetThreadId()); | |
| 64 | |
| 65 CFStringRef level = NULL; | |
| 66 // See QA1340 <http://developer.apple.com/library/mac/#qa/qa1340/> for more | |
| 67 // details. | |
| 68 switch (type_) { | |
| 69 case PowerSaveBlocker::kPowerSaveBlockPreventAppSuspension: | |
| 70 level = kIOPMAssertionTypeNoIdleSleep; | |
| 71 break; | |
| 72 case PowerSaveBlocker::kPowerSaveBlockPreventDisplaySleep: | |
| 73 level = kIOPMAssertionTypeNoDisplaySleep; | |
| 74 break; | |
| 75 default: | |
| 76 NOTREACHED(); | |
| 77 break; | |
| 78 } | |
| 79 if (level) { | |
| 80 base::ScopedCFTypeRef<CFStringRef> cf_description( | |
| 81 base::SysUTF8ToCFStringRef(description_)); | |
| 82 IOReturn result = IOPMAssertionCreateWithName(level, kIOPMAssertionLevelOn, | |
| 83 cf_description, &assertion_); | |
| 84 LOG_IF(ERROR, result != kIOReturnSuccess) | |
| 85 << "IOPMAssertionCreate: " << result; | |
| 86 } | |
| 87 } | |
| 88 | |
| 89 void PowerSaveBlockerImpl::Delegate::RemoveBlock() { | |
| 90 DCHECK_EQ(base::PlatformThread::CurrentId(), | |
| 91 g_power_thread.Pointer()->GetThreadId()); | |
| 92 | |
| 93 if (assertion_ != kIOPMNullAssertionID) { | |
| 94 IOReturn result = IOPMAssertionRelease(assertion_); | |
| 95 LOG_IF(ERROR, result != kIOReturnSuccess) | |
| 96 << "IOPMAssertionRelease: " << result; | |
| 97 } | |
| 98 } | |
| 99 | |
| 100 PowerSaveBlockerImpl::PowerSaveBlockerImpl( | |
| 101 PowerSaveBlockerType type, | |
| 102 Reason reason, | |
| 103 const std::string& description, | |
| 104 scoped_refptr<base::SequencedTaskRunner> ui_task_runner, | |
| 105 scoped_refptr<base::SingleThreadTaskRunner> blocking_task_runner) | |
| 106 : delegate_(new Delegate(type, description)), | |
| 107 ui_task_runner_(ui_task_runner), | |
| 108 blocking_task_runner_(blocking_task_runner) { | |
| 109 g_power_thread.Pointer()->message_loop()->PostTask( | |
| 110 FROM_HERE, | |
| 111 base::Bind(&Delegate::ApplyBlock, delegate_)); | |
| 112 } | |
| 113 | |
| 114 PowerSaveBlockerImpl::~PowerSaveBlockerImpl() { | |
| 115 g_power_thread.Pointer()->message_loop()->PostTask( | |
| 116 FROM_HERE, | |
| 117 base::Bind(&Delegate::RemoveBlock, delegate_)); | |
| 118 } | |
| 119 | |
| 120 } // namespace content | |
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Chromium Code Reviews
Issue 1999953002:
Move content/browser/power_save_blocker to //device/power_save_blocker (Closed)
Base URL: https://chromium.googlesource.com/chromium/src.git@power-save-next-2