public CounterSample NextSample()
{
string categoryName = this.categoryName;
string machineName = this.machineName;
new PerformanceCounterPermission(PerformanceCounterPermissionAccess.Browse, machineName, categoryName).Demand();
this.Initialize();
CategorySample categorySample = PerformanceCounterLib.GetCategorySample(machineName, categoryName);
CounterDefinitionSample counterDefinitionSample = categorySample.GetCounterDefinitionSample(this.counterName);
this.counterType = counterDefinitionSample.CounterType;
if (!categorySample.IsMultiInstance)
{
if ((this.instanceName != null) && (this.instanceName.Length != 0))
{
throw new InvalidOperationException(SR.GetString("InstanceNameProhibited", new object[] { this.instanceName }));
}
return(counterDefinitionSample.GetSingleValue());
}
if ((this.instanceName == null) || (this.instanceName.Length == 0))
{
throw new InvalidOperationException(SR.GetString("InstanceNameRequired"));
}
return(counterDefinitionSample.GetInstanceValue(this.instanceName));
}
// Will cause an update, raw value
/// <devdoc>
/// Obtains a counter sample and returns the raw value for it.
/// </devdoc>
public CounterSample NextSample()
{
string currentCategoryName = categoryName;
string currentMachineName = machineName;
PerformanceCounterPermission permission = new PerformanceCounterPermission(PerformanceCounterPermissionAccess.Read, currentMachineName, currentCategoryName);
permission.Demand();
Initialize();
CategorySample categorySample = PerformanceCounterLib.GetCategorySample(currentMachineName, currentCategoryName);
CounterDefinitionSample counterSample = categorySample.GetCounterDefinitionSample(this.counterName);
this.counterType = counterSample.CounterType;
if (!categorySample.IsMultiInstance)
{
if (instanceName != null && instanceName.Length != 0)
{
throw new InvalidOperationException(SR.GetString(SR.InstanceNameProhibited, this.instanceName));
}
return(counterSample.GetSingleValue());
}
else
{
if (instanceName == null || instanceName.Length == 0)
{
throw new InvalidOperationException(SR.GetString(SR.InstanceNameRequired));
}
return(counterSample.GetInstanceValue(this.instanceName));
}
}
// Will cause an update, raw value
/// <summary>
/// Obtains a counter sample and returns the raw value for it.
/// </summary>
public CounterSample NextSample()
{
string currentCategoryName = _categoryName;
string currentMachineName = _machineName;
Initialize();
using (CategorySample categorySample = PerformanceCounterLib.GetCategorySample(currentMachineName, currentCategoryName))
{
CounterDefinitionSample counterSample = categorySample.GetCounterDefinitionSample(_counterName);
_counterType = counterSample._counterType;
if (!categorySample._isMultiInstance)
{
if (_instanceName != null && _instanceName.Length != 0)
{
throw new InvalidOperationException(SR.Format(SR.InstanceNameProhibited, _instanceName));
}
return(counterSample.GetSingleValue());
}
else
{
if (_instanceName == null || _instanceName.Length == 0)
{
throw new InvalidOperationException(SR.InstanceNameRequired);
}
return(counterSample.GetInstanceValue(_instanceName));
}
}
}
// Will cause an update, raw value
/// <include file='doc\PerformanceCounter.uex' path='docs/doc[@for="PerformanceCounter.NextSample"]/*' />
/// <devdoc>
/// Obtains a counter sample and returns the raw value for it.
/// </devdoc>
public CounterSample NextSample()
{
Initialize();
CategorySample categorySample = PerformanceCounterLib.GetCategorySample(this.machineName, this.categoryName);
try {
CounterDefinitionSample counterSample = categorySample.GetCounterDefinitionSample(this.counterName);
this.counterType = counterSample.CounterType;
if (counterSample.IsSingleInstance)
{
if (instanceName != null && instanceName.Length != 0)
{
throw new InvalidOperationException(SR.GetString(SR.InstanceNameProhibited, this.instanceName));
}
return(counterSample.GetSingleValue());
}
else
{
if (instanceName == null || instanceName.Length == 0)
{
throw new InvalidOperationException(SR.GetString(SR.InstanceNameRequired));
}
return(counterSample.GetInstanceValue(this.instanceName));
}
}
finally {
categorySample.Dispose();
}
}
/// <devdoc>
/// Reads all the counter and instance data of this performance category. Note that reading the entire category
/// at once can be as efficient as reading a single counter because of the way the system provides the data.
/// </devdoc>
public InstanceDataCollectionCollection ReadCategory()
{
if (this.categoryName == null)
{
throw new InvalidOperationException(SR.GetString(SR.CategoryNameNotSet));
}
CategorySample categorySample = PerformanceCounterLib.GetCategorySample(this.machineName, this.categoryName);
return(categorySample.ReadCategory());
}
/// <summary>
/// Reads all the counter and instance data of this performance category. Note that reading the entire category
/// at once can be as efficient as reading a single counter because of the way the system provides the data.
/// </summary>
public InstanceDataCollectionCollection ReadCategory()
{
if (_categoryName == null)
{
throw new InvalidOperationException(SR.CategoryNameNotSet);
}
using (CategorySample categorySample = PerformanceCounterLib.GetCategorySample(_machineName, _categoryName))
{
return(categorySample.ReadCategory());
}
}
/// <summary>
/// Returns true if the instance already exists for this category.
/// </summary>
public bool InstanceExists(string instanceName)
{
ArgumentNullException.ThrowIfNull(instanceName);
if (_categoryName == null)
{
throw new InvalidOperationException(SR.CategoryNameNotSet);
}
using (CategorySample categorySample = PerformanceCounterLib.GetCategorySample(_machineName, _categoryName))
{
return(categorySample._instanceNameTable.ContainsKey(instanceName));
}
}
internal CounterDefinitionSample(Microsoft.Win32.NativeMethods.PERF_COUNTER_DEFINITION perfCounter, CategorySample categorySample, int instanceNumber)
{
this.NameIndex = perfCounter.CounterNameTitleIndex;
this.CounterType = perfCounter.CounterType;
this.offset = perfCounter.CounterOffset;
this.size = perfCounter.CounterSize;
if (instanceNumber == -1)
{
this.instanceValues = new long[1];
}
else
{
this.instanceValues = new long[instanceNumber];
}
this.categorySample = categorySample;
}
/// <devdoc>
/// Returns true if the instance already exists for this category.
/// </devdoc>
public bool InstanceExists(string instanceName)
{
if (instanceName == null)
{
throw new ArgumentNullException("instanceName");
}
if (this.categoryName == null)
{
throw new InvalidOperationException(SR.GetString(SR.CategoryNameNotSet));
}
CategorySample categorySample = PerformanceCounterLib.GetCategorySample(machineName, categoryName);
return(categorySample.InstanceNameTable.ContainsKey(instanceName));
}
internal CounterDefinitionSample(Microsoft.Win32.NativeMethods.PERF_COUNTER_DEFINITION perfCounter, CategorySample categorySample, int instanceNumber)
{
this.NameIndex = perfCounter.CounterNameTitleIndex;
this.CounterType = perfCounter.CounterType;
this.offset = perfCounter.CounterOffset;
this.size = perfCounter.CounterSize;
if (instanceNumber == -1)
{
this.instanceValues = new long[1];
}
else
{
this.instanceValues = new long[instanceNumber];
}
this.categorySample = categorySample;
}
internal static string[] GetCounterInstances(string categoryName, string machineName)
{
new PerformanceCounterPermission(PerformanceCounterPermissionAccess.Browse, machineName, categoryName).Demand();
CategorySample categorySample = PerformanceCounterLib.GetCategorySample(machineName, categoryName);
if (categorySample.InstanceNameTable.Count == 0)
{
return(new string[0]);
}
string[] array = new string[categorySample.InstanceNameTable.Count];
categorySample.InstanceNameTable.Keys.CopyTo(array, 0);
if ((array.Length == 1) && (array[0].CompareTo("systemdiagnosticsperfcounterlibsingleinstance") == 0))
{
return(new string[0]);
}
return(array);
}
/// <summary>
/// Returns the instance names for a given category
/// </summary>
/// <internalonly/>
internal static string[] GetCounterInstances(string categoryName, string machineName)
{
CategorySample categorySample = PerformanceCounterLib.GetCategorySample(machineName, categoryName);
if (categorySample._instanceNameTable.Count == 0)
{
return(Array.Empty <string>());
}
string[] instanceNames = new string[categorySample._instanceNameTable.Count];
categorySample._instanceNameTable.Keys.CopyTo(instanceNames, 0);
if (instanceNames.Length == 1 && instanceNames[0] == PerformanceCounterLib.SingleInstanceName)
{
return(Array.Empty <string>());
}
return(instanceNames);
}
/// <include file='doc\PerformanceCounterCategory.uex' path='docs/doc[@for="PerformanceCounterCategory.GetCounterInstances"]/*' />
/// <devdoc>
/// Returns the instance names for a given category
/// </devdoc>
/// <internalonly/>
internal static string[] GetCounterInstances(string categoryName, string machineName)
{
if (categoryName == null)
{
throw new ArgumentNullException("categoryName");
}
if (categoryName.Length == 0)
{
throw new ArgumentException(SR.GetString(SR.InvalidParameter, "categoryName", categoryName));
}
if (!SyntaxCheck.CheckMachineName(machineName))
{
throw new ArgumentException(SR.GetString(SR.InvalidParameter, "machineName", machineName));
}
PerformanceCounterPermission permission = new PerformanceCounterPermission(PerformanceCounterPermissionAccess.Browse, machineName, categoryName);
permission.Demand();
CategorySample categorySample = PerformanceCounterLib.GetCategorySample(machineName, categoryName);
try {
if (categorySample.InstanceNameTable.Count == 0)
{
throw new InvalidOperationException(SR.GetString(SR.NoInstanceInformation, categoryName));
}
string[] instanceNames = new string[categorySample.InstanceNameTable.Count];
categorySample.InstanceNameTable.Keys.CopyTo(instanceNames, 0);
if (instanceNames.Length == 1 && instanceNames[0].CompareTo(PerformanceCounterLib.SingleInstanceName) == 0)
{
return(new string[0]);
}
return(instanceNames);
}
finally {
categorySample.Dispose();
}
}
internal static CategorySample GetCategorySample(string machine, string category)
{
CategorySample categorySample = GetPerformanceCounterLib(machine, new CultureInfo(9)).GetCategorySample(category);
if ((categorySample == null) && (CultureInfo.CurrentCulture.Parent.LCID != 9))
{
for (CultureInfo info = CultureInfo.CurrentCulture; info != CultureInfo.InvariantCulture; info = info.Parent)
{
categorySample = GetPerformanceCounterLib(machine, info).GetCategorySample(category);
if (categorySample != null)
{
return(categorySample);
}
}
}
if (categorySample == null)
{
throw new InvalidOperationException(SR.GetString("MissingCategory"));
}
return(categorySample);
}
/// <devdoc>
/// Returns the instance names for a given category
/// </devdoc>
/// <internalonly/>
internal static string[] GetCounterInstances(string categoryName, string machineName)
{
PerformanceCounterPermission permission = new PerformanceCounterPermission(PerformanceCounterPermissionAccess.Read, machineName, categoryName);
permission.Demand();
CategorySample categorySample = PerformanceCounterLib.GetCategorySample(machineName, categoryName);
if (categorySample.InstanceNameTable.Count == 0)
{
return(new string[0]);
}
string[] instanceNames = new string[categorySample.InstanceNameTable.Count];
categorySample.InstanceNameTable.Keys.CopyTo(instanceNames, 0);
if (instanceNames.Length == 1 && instanceNames[0].CompareTo(PerformanceCounterLib.SingleInstanceName) == 0)
{
return(new string[0]);
}
return(instanceNames);
}
private CategorySample GetCategorySample(string category) {
CategoryEntry entry = (CategoryEntry)this.CategoryTable[category];
if (entry == null)
return null;
CategorySample sample = null;
byte[] dataRef = GetPerformanceData(entry.NameIndex.ToString(CultureInfo.InvariantCulture));
if (dataRef == null)
throw new InvalidOperationException(SR.GetString(SR.CantReadCategory, category));
sample = new CategorySample(dataRef, entry, this);
return sample;
}
