Inheritance diagram for lm::LoadMonitor::PerformanceCounterEnumCache:
Public Member Functions | |
| PerformanceCounterEnumCache (void) | |
| Create new cache object. | |
| virtual | ~PerformanceCounterEnumCache (void) |
| Free all resources. | |
| virtual bool | AddToRefresher (IWbemConfigureRefresher *configure, IWbemServices *services)=0 |
| Add enumerator from this object to the refresher. | |
| virtual void | Release (void)=0 |
| Release all resources. | |
| virtual bool | QueryData (LoadSample &target)=0 |
| Query data from enumerator. | |
| HRESULT | GetEnumObjects (IWbemHiPerfEnum *wbem_enum, size_t *object_count, IWbemObjectAccess ***access_objects) |
| Get objects from given enumeration. | |
| void | ClearEnumObjects (IWbemObjectAccess **access_objects, size_t object_count) |
| Clear WMI objects. | |
Protected Member Functions | |
| bool | Cache (IWbemObjectAccess *access_object) |
| Cache handles of all properties. | |
| virtual bool | CacheImpl (IWbemObjectAccess *access_object)=0 |
| Property caching implementation. | |
Protected Attributes | |
| bool | is_cached |
| Are property handles cached? | |
Classes derived from this base class should store all data related to enumerator of specific feature (e.g. enumerator ID, IDs of various properties, etc.).
| lm::LoadMonitor::PerformanceCounterEnumCache::PerformanceCounterEnumCache | ( | void | ) | [inline] |
Create new cache object.
| virtual lm::LoadMonitor::PerformanceCounterEnumCache::~PerformanceCounterEnumCache | ( | void | ) | [inline, virtual] |
Free all resources.
Empty method. Note that derived class should call Release() in its destructor to properly free all resources.
| virtual bool lm::LoadMonitor::PerformanceCounterEnumCache::AddToRefresher | ( | IWbemConfigureRefresher * | configure, | |
| IWbemServices * | services | |||
| ) | [pure virtual] |
Add enumerator from this object to the refresher.
| configure | Pointer to the configure refresher object through which enumerator should be added. | |
| services | WMI service provider. |
Implemented in lm::LoadMonitor::ProcessorEnumCache, lm::LoadMonitor::NetworkEnumCache, lm::LoadMonitor::MemoryEnumCache, lm::LoadMonitor::SystemEnumCache, and lm::LoadMonitor::DriveEnumCache.
| bool lm::LoadMonitor::PerformanceCounterEnumCache::Cache | ( | IWbemObjectAccess * | access_object | ) | [inline, protected] |
Cache handles of all properties.
This method should be called only once in QueryData to cache IDs for all properties needed. This method provides just wrapper for actual caching that should be implemented in CacheImpl method.
| access_object | Instance of IWbemObjectAccess object which contains properties that require handles to be cached. |
| virtual bool lm::LoadMonitor::PerformanceCounterEnumCache::CacheImpl | ( | IWbemObjectAccess * | access_object | ) | [protected, pure virtual] |
Property caching implementation.
Implemented in lm::LoadMonitor::ProcessorEnumCache, lm::LoadMonitor::NetworkEnumCache, lm::LoadMonitor::MemoryEnumCache, lm::LoadMonitor::SystemEnumCache, and lm::LoadMonitor::DriveEnumCache.
| void lm::LoadMonitor::PerformanceCounterEnumCache::ClearEnumObjects | ( | IWbemObjectAccess ** | access_objects, | |
| size_t | object_count | |||
| ) |
Clear WMI objects.
| access_objects | Array containing pointers to the access objects that should be cleared. Note that this array will be deleted. | |
| object_count | Number of objects stored in array. |
| HRESULT lm::LoadMonitor::PerformanceCounterEnumCache::GetEnumObjects | ( | IWbemHiPerfEnum * | wbem_enum, | |
| size_t * | object_count, | |||
| IWbemObjectAccess *** | access_objects | |||
| ) |
Get objects from given enumeration.
Retrieve objects from enumerator and store result in newly allocated buffer. You have to free resulting buffer by yourself (with ClearEnumObjects method). Note that resulting buffer may be bigger than actual number of objects that will be stored in it.
| wbem_enum | Enumerator in which objects are currently stored. | |
| object_count | Pointer to variable which will receive number of objects that were stored in the enumerator. This cannot be NULL. | |
| access_objects | Pointer to an array of the IWbemObjectAccess pointers. This array will receive objects that were stored in enumerator. Array with correct size will be automatically allocated. |
| WBEM_S_NO_ERROR | Call was successful. | |
| WBEM_S_TIMEDOUT | Enumerator was busy. | |
| WBEM_E_NOT_FOUND | Provider was not able to retrieve requested instance. | |
| WBEM_E_PROVIDER_NOT_CAPABLE | Provider was not able to rerieve specific instances. | |
| WBEM_E_FAILED | Internal failure, but the operation was valid. | |
| WBEM_E_BUFFER_TOO_SMALL | Buffer allocation failed. |
| virtual bool lm::LoadMonitor::PerformanceCounterEnumCache::QueryData | ( | LoadSample & | target | ) | [pure virtual] |
Query data from enumerator.
This method should query all objects stored in enumeration using GetEnumObjects and then query required properties and put resulting data in LoadSample provided in parameter. If anything fails, sample should remain unchanged.
| target | Sample to which all data will be put. All data will be allocated as necessary. |
Implemented in lm::LoadMonitor::ProcessorEnumCache, lm::LoadMonitor::NetworkEnumCache, lm::LoadMonitor::MemoryEnumCache, lm::LoadMonitor::SystemEnumCache, and lm::LoadMonitor::DriveEnumCache.
| virtual void lm::LoadMonitor::PerformanceCounterEnumCache::Release | ( | void | ) | [pure virtual] |
Release all resources.
This should release all enumerators and other COM objects with their Release methods.
Implemented in lm::LoadMonitor::ProcessorEnumCache, lm::LoadMonitor::NetworkEnumCache, lm::LoadMonitor::MemoryEnumCache, lm::LoadMonitor::SystemEnumCache, and lm::LoadMonitor::DriveEnumCache.
bool lm::LoadMonitor::PerformanceCounterEnumCache::is_cached [protected] |
Are property handles cached?
1.4.7