Code:
/ Dotnetfx_Vista_SP2 / Dotnetfx_Vista_SP2 / 8.0.50727.4016 / DEVDIV / depot / DevDiv / releases / whidbey / NetFxQFE / ndp / fx / src / Services / Monitoring / system / Diagnosticts / ProcessThread.cs / 1 / ProcessThread.cs
//------------------------------------------------------------------------------
//
// Copyright (c) Microsoft Corporation. All rights reserved.
//
//-----------------------------------------------------------------------------
namespace System.Diagnostics {
using System.Threading;
using System.Runtime.InteropServices;
using System.ComponentModel;
using System.Diagnostics;
using System;
using System.Collections;
using System.IO;
using Microsoft.Win32;
using System.Security.Permissions;
using Microsoft.Win32.SafeHandles;
// using System.Windows.Forms;
///
///
/// Represents a Win32 thread. This can be used to obtain
/// information about the thread, such as it's performance characteristics. This is
/// returned from the System.Diagnostics.Process.ProcessThread property of the System.Diagnostics.Process component.
///
///
/// I don't understand
/// the following comment associated with the previous sentence: "property of
/// Process component " Rather than just "processTHread". There is no such
/// member on Process. Do we mean 'threads'?
///
///
[
Designer("System.Diagnostics.Design.ProcessThreadDesigner, " + AssemblyRef.SystemDesign),
HostProtection(SelfAffectingProcessMgmt=true, SelfAffectingThreading=true)
]
public class ProcessThread : Component {
//
// FIELDS
//
ThreadInfo threadInfo;
bool isRemoteMachine;
bool priorityBoostEnabled;
bool havePriorityBoostEnabled;
ThreadPriorityLevel priorityLevel;
bool havePriorityLevel;
//
// CONSTRUCTORS
//
///
/// Internal constructor.
///
///
/// Returns the base priority of the thread which is computed by combining the
/// process priority class with the priority level of the associated thread.
///
[MonitoringDescription(SR.ThreadBasePriority)]
public int BasePriority {
get {
return threadInfo.basePriority;
}
}
///
/// The current priority indicates the actual priority of the associated thread,
/// which may deviate from the base priority based on how the OS is currently
/// scheduling the thread.
///
[MonitoringDescription(SR.ThreadCurrentPriority)]
public int CurrentPriority {
get {
return threadInfo.currentPriority;
}
}
///
/// Returns the unique identifier for the associated thread.
///
[MonitoringDescription(SR.ThreadId)]
public int Id {
get {
return threadInfo.threadId;
}
}
///
///
/// Sets the processor that this thread would ideally like to run on.
///
///
[Browsable(false)]
public int IdealProcessor {
set {
SafeThreadHandle threadHandle = null;
try {
threadHandle = OpenThreadHandle(NativeMethods.THREAD_SET_INFORMATION);
if (NativeMethods.SetThreadIdealProcessor(threadHandle, value) < 0) {
throw new Win32Exception();
}
}
finally {
CloseThreadHandle(threadHandle);
}
}
}
///
/// Returns or sets whether this thread would like a priority boost if the user interacts
/// with user interface associated with this thread.
///
[MonitoringDescription(SR.ThreadPriorityBoostEnabled)]
public bool PriorityBoostEnabled {
get {
if (!havePriorityBoostEnabled) {
SafeThreadHandle threadHandle = null;
try {
threadHandle = OpenThreadHandle(NativeMethods.THREAD_QUERY_INFORMATION);
bool disabled = false;
if (!NativeMethods.GetThreadPriorityBoost(threadHandle, out disabled)) {
throw new Win32Exception();
}
priorityBoostEnabled = !disabled;
havePriorityBoostEnabled = true;
}
finally {
CloseThreadHandle(threadHandle);
}
}
return priorityBoostEnabled;
}
set {
SafeThreadHandle threadHandle = null;
try {
threadHandle = OpenThreadHandle(NativeMethods.THREAD_SET_INFORMATION);
if (!NativeMethods.SetThreadPriorityBoost(threadHandle, !value))
throw new Win32Exception();
priorityBoostEnabled = value;
havePriorityBoostEnabled = true;
}
finally {
CloseThreadHandle(threadHandle);
}
}
}
///
/// Returns or sets the priority level of the associated thread. The priority level is
/// not an absolute level, but instead contributes to the actual thread priority by
/// considering the priority class of the process.
///
[MonitoringDescription(SR.ThreadPriorityLevel)]
public ThreadPriorityLevel PriorityLevel {
get {
if (!havePriorityLevel) {
SafeThreadHandle threadHandle = null;
try {
threadHandle = OpenThreadHandle(NativeMethods.THREAD_QUERY_INFORMATION);
int value = NativeMethods.GetThreadPriority(threadHandle);
if (value == 0x7fffffff) {
throw new Win32Exception();
}
priorityLevel = (ThreadPriorityLevel)value;
havePriorityLevel = true;
}
finally {
CloseThreadHandle(threadHandle);
}
}
return priorityLevel;
}
set {
SafeThreadHandle threadHandle = null;
try {
threadHandle = OpenThreadHandle(NativeMethods.THREAD_SET_INFORMATION);
if (!NativeMethods.SetThreadPriority(threadHandle, (int)value)) {
throw new Win32Exception();
}
priorityLevel = value;
}
finally {
CloseThreadHandle(threadHandle);
}
}
}
///
/// Returns the amount of time the thread has spent running code inside the operating
/// system core.
///
[MonitoringDescription(SR.ThreadPrivilegedProcessorTime)]
public TimeSpan PrivilegedProcessorTime {
get {
EnsureState(State.IsNt);
return GetThreadTimes().PrivilegedProcessorTime;
}
}
///
/// Returns the memory address of the function that was called when the associated
/// thread was started.
///
[MonitoringDescription(SR.ThreadStartAddress)]
public IntPtr StartAddress {
get {
EnsureState(State.IsNt);
return threadInfo.startAddress;
}
}
///
/// Returns the time the associated thread was started.
///
[MonitoringDescription(SR.ThreadStartTime)]
public DateTime StartTime {
get {
EnsureState(State.IsNt);
return GetThreadTimes().StartTime;
}
}
///
/// Returns the current state of the associated thread, e.g. is it running, waiting, etc.
///
[MonitoringDescription(SR.ThreadThreadState)]
public ThreadState ThreadState {
get {
EnsureState(State.IsNt);
return threadInfo.threadState;
}
}
///
/// Returns the amount of time the associated thread has spent utilizing the CPU.
/// It is the sum of the System.Diagnostics.ProcessThread.UserProcessorTime and
/// System.Diagnostics.ProcessThread.PrivilegedProcessorTime.
///
[MonitoringDescription(SR.ThreadTotalProcessorTime)]
public TimeSpan TotalProcessorTime {
get {
EnsureState(State.IsNt);
return GetThreadTimes().TotalProcessorTime;
}
}
///
/// Returns the amount of time the associated thread has spent running code
/// inside the application (not the operating system core).
///
[MonitoringDescription(SR.ThreadUserProcessorTime)]
public TimeSpan UserProcessorTime {
get {
EnsureState(State.IsNt);
return GetThreadTimes().UserProcessorTime;
}
}
///
/// Returns the reason the associated thread is waiting, if any.
///
[MonitoringDescription(SR.ThreadWaitReason)]
public ThreadWaitReason WaitReason {
get {
EnsureState(State.IsNt);
if (threadInfo.threadState != ThreadState.Wait) {
throw new InvalidOperationException(SR.GetString(SR.WaitReasonUnavailable));
}
return threadInfo.threadWaitReason;
}
}
//
// METHODS
//
///
/// Helper to close a thread handle.
///
///
/// Helper to check preconditions for property access.
///
void EnsureState(State state) {
if ( ((state & State.IsLocal) != (State)0) && isRemoteMachine) {
throw new NotSupportedException(SR.GetString(SR.NotSupportedRemoteThread));
}
if ((state & State.IsNt) != (State)0) {
if (Environment.OSVersion.Platform != PlatformID.Win32NT) {
throw new PlatformNotSupportedException(SR.GetString(SR.WinNTRequired));
}
}
}
///
/// Helper to open a thread handle.
///
///
/// Resets the ideal processor so there is no ideal processor for this thread (e.g.
/// any processor is ideal).
///
public void ResetIdealProcessor() {
// 32 means "any processor is fine"
IdealProcessor = 32;
}
///
/// Sets which processors the associated thread is allowed to be scheduled to run on.
/// Each processor is represented as a bit: bit 0 is processor one, bit 1 is processor
/// two, etc. For example, the value 1 means run on processor one, 2 means run on
/// processor two, 3 means run on processor one or two.
///
[Browsable(false)]
public IntPtr ProcessorAffinity {
set {
SafeThreadHandle threadHandle = null;
try {
threadHandle = OpenThreadHandle(NativeMethods.THREAD_SET_INFORMATION | NativeMethods.THREAD_QUERY_INFORMATION);
if (NativeMethods.SetThreadAffinityMask(threadHandle, new HandleRef(this, value)) == IntPtr.Zero) {
throw new Win32Exception();
}
}
finally {
CloseThreadHandle(threadHandle);
}
}
}
private ProcessThreadTimes GetThreadTimes() {
ProcessThreadTimes threadTimes = new ProcessThreadTimes();
SafeThreadHandle threadHandle = null;
try {
threadHandle = OpenThreadHandle(NativeMethods.THREAD_QUERY_INFORMATION);
if (!NativeMethods.GetThreadTimes(threadHandle,
out threadTimes.create,
out threadTimes.exit,
out threadTimes.kernel,
out threadTimes.user)) {
throw new Win32Exception();
}
}
finally {
CloseThreadHandle(threadHandle);
}
return threadTimes;
}
///
/// Preconditions for accessing properties.
///
///
// Copyright (c) Microsoft Corporation. All rights reserved.
//
//-----------------------------------------------------------------------------
namespace System.Diagnostics {
using System.Threading;
using System.Runtime.InteropServices;
using System.ComponentModel;
using System.Diagnostics;
using System;
using System.Collections;
using System.IO;
using Microsoft.Win32;
using System.Security.Permissions;
using Microsoft.Win32.SafeHandles;
// using System.Windows.Forms;
///
///
/// Represents a Win32 thread. This can be used to obtain
/// information about the thread, such as it's performance characteristics. This is
/// returned from the System.Diagnostics.Process.ProcessThread property of the System.Diagnostics.Process component.
///
///
/// I don't understand
/// the following comment associated with the previous sentence: "property of
/// Process component " Rather than just "processTHread". There is no such
/// member on Process. Do we mean 'threads'?
///
///
[
Designer("System.Diagnostics.Design.ProcessThreadDesigner, " + AssemblyRef.SystemDesign),
HostProtection(SelfAffectingProcessMgmt=true, SelfAffectingThreading=true)
]
public class ProcessThread : Component {
//
// FIELDS
//
ThreadInfo threadInfo;
bool isRemoteMachine;
bool priorityBoostEnabled;
bool havePriorityBoostEnabled;
ThreadPriorityLevel priorityLevel;
bool havePriorityLevel;
//
// CONSTRUCTORS
//
///
/// Internal constructor.
///
///
/// Returns the base priority of the thread which is computed by combining the
/// process priority class with the priority level of the associated thread.
///
[MonitoringDescription(SR.ThreadBasePriority)]
public int BasePriority {
get {
return threadInfo.basePriority;
}
}
///
/// The current priority indicates the actual priority of the associated thread,
/// which may deviate from the base priority based on how the OS is currently
/// scheduling the thread.
///
[MonitoringDescription(SR.ThreadCurrentPriority)]
public int CurrentPriority {
get {
return threadInfo.currentPriority;
}
}
///
/// Returns the unique identifier for the associated thread.
///
[MonitoringDescription(SR.ThreadId)]
public int Id {
get {
return threadInfo.threadId;
}
}
///
///
/// Sets the processor that this thread would ideally like to run on.
///
///
[Browsable(false)]
public int IdealProcessor {
set {
SafeThreadHandle threadHandle = null;
try {
threadHandle = OpenThreadHandle(NativeMethods.THREAD_SET_INFORMATION);
if (NativeMethods.SetThreadIdealProcessor(threadHandle, value) < 0) {
throw new Win32Exception();
}
}
finally {
CloseThreadHandle(threadHandle);
}
}
}
///
/// Returns or sets whether this thread would like a priority boost if the user interacts
/// with user interface associated with this thread.
///
[MonitoringDescription(SR.ThreadPriorityBoostEnabled)]
public bool PriorityBoostEnabled {
get {
if (!havePriorityBoostEnabled) {
SafeThreadHandle threadHandle = null;
try {
threadHandle = OpenThreadHandle(NativeMethods.THREAD_QUERY_INFORMATION);
bool disabled = false;
if (!NativeMethods.GetThreadPriorityBoost(threadHandle, out disabled)) {
throw new Win32Exception();
}
priorityBoostEnabled = !disabled;
havePriorityBoostEnabled = true;
}
finally {
CloseThreadHandle(threadHandle);
}
}
return priorityBoostEnabled;
}
set {
SafeThreadHandle threadHandle = null;
try {
threadHandle = OpenThreadHandle(NativeMethods.THREAD_SET_INFORMATION);
if (!NativeMethods.SetThreadPriorityBoost(threadHandle, !value))
throw new Win32Exception();
priorityBoostEnabled = value;
havePriorityBoostEnabled = true;
}
finally {
CloseThreadHandle(threadHandle);
}
}
}
///
/// Returns or sets the priority level of the associated thread. The priority level is
/// not an absolute level, but instead contributes to the actual thread priority by
/// considering the priority class of the process.
///
[MonitoringDescription(SR.ThreadPriorityLevel)]
public ThreadPriorityLevel PriorityLevel {
get {
if (!havePriorityLevel) {
SafeThreadHandle threadHandle = null;
try {
threadHandle = OpenThreadHandle(NativeMethods.THREAD_QUERY_INFORMATION);
int value = NativeMethods.GetThreadPriority(threadHandle);
if (value == 0x7fffffff) {
throw new Win32Exception();
}
priorityLevel = (ThreadPriorityLevel)value;
havePriorityLevel = true;
}
finally {
CloseThreadHandle(threadHandle);
}
}
return priorityLevel;
}
set {
SafeThreadHandle threadHandle = null;
try {
threadHandle = OpenThreadHandle(NativeMethods.THREAD_SET_INFORMATION);
if (!NativeMethods.SetThreadPriority(threadHandle, (int)value)) {
throw new Win32Exception();
}
priorityLevel = value;
}
finally {
CloseThreadHandle(threadHandle);
}
}
}
///
/// Returns the amount of time the thread has spent running code inside the operating
/// system core.
///
[MonitoringDescription(SR.ThreadPrivilegedProcessorTime)]
public TimeSpan PrivilegedProcessorTime {
get {
EnsureState(State.IsNt);
return GetThreadTimes().PrivilegedProcessorTime;
}
}
///
/// Returns the memory address of the function that was called when the associated
/// thread was started.
///
[MonitoringDescription(SR.ThreadStartAddress)]
public IntPtr StartAddress {
get {
EnsureState(State.IsNt);
return threadInfo.startAddress;
}
}
///
/// Returns the time the associated thread was started.
///
[MonitoringDescription(SR.ThreadStartTime)]
public DateTime StartTime {
get {
EnsureState(State.IsNt);
return GetThreadTimes().StartTime;
}
}
///
/// Returns the current state of the associated thread, e.g. is it running, waiting, etc.
///
[MonitoringDescription(SR.ThreadThreadState)]
public ThreadState ThreadState {
get {
EnsureState(State.IsNt);
return threadInfo.threadState;
}
}
///
/// Returns the amount of time the associated thread has spent utilizing the CPU.
/// It is the sum of the System.Diagnostics.ProcessThread.UserProcessorTime and
/// System.Diagnostics.ProcessThread.PrivilegedProcessorTime.
///
[MonitoringDescription(SR.ThreadTotalProcessorTime)]
public TimeSpan TotalProcessorTime {
get {
EnsureState(State.IsNt);
return GetThreadTimes().TotalProcessorTime;
}
}
///
/// Returns the amount of time the associated thread has spent running code
/// inside the application (not the operating system core).
///
[MonitoringDescription(SR.ThreadUserProcessorTime)]
public TimeSpan UserProcessorTime {
get {
EnsureState(State.IsNt);
return GetThreadTimes().UserProcessorTime;
}
}
///
/// Returns the reason the associated thread is waiting, if any.
///
[MonitoringDescription(SR.ThreadWaitReason)]
public ThreadWaitReason WaitReason {
get {
EnsureState(State.IsNt);
if (threadInfo.threadState != ThreadState.Wait) {
throw new InvalidOperationException(SR.GetString(SR.WaitReasonUnavailable));
}
return threadInfo.threadWaitReason;
}
}
//
// METHODS
//
///
/// Helper to close a thread handle.
///
///
/// Helper to check preconditions for property access.
///
void EnsureState(State state) {
if ( ((state & State.IsLocal) != (State)0) && isRemoteMachine) {
throw new NotSupportedException(SR.GetString(SR.NotSupportedRemoteThread));
}
if ((state & State.IsNt) != (State)0) {
if (Environment.OSVersion.Platform != PlatformID.Win32NT) {
throw new PlatformNotSupportedException(SR.GetString(SR.WinNTRequired));
}
}
}
///
/// Helper to open a thread handle.
///
///
/// Resets the ideal processor so there is no ideal processor for this thread (e.g.
/// any processor is ideal).
///
public void ResetIdealProcessor() {
// 32 means "any processor is fine"
IdealProcessor = 32;
}
///
/// Sets which processors the associated thread is allowed to be scheduled to run on.
/// Each processor is represented as a bit: bit 0 is processor one, bit 1 is processor
/// two, etc. For example, the value 1 means run on processor one, 2 means run on
/// processor two, 3 means run on processor one or two.
///
[Browsable(false)]
public IntPtr ProcessorAffinity {
set {
SafeThreadHandle threadHandle = null;
try {
threadHandle = OpenThreadHandle(NativeMethods.THREAD_SET_INFORMATION | NativeMethods.THREAD_QUERY_INFORMATION);
if (NativeMethods.SetThreadAffinityMask(threadHandle, new HandleRef(this, value)) == IntPtr.Zero) {
throw new Win32Exception();
}
}
finally {
CloseThreadHandle(threadHandle);
}
}
}
private ProcessThreadTimes GetThreadTimes() {
ProcessThreadTimes threadTimes = new ProcessThreadTimes();
SafeThreadHandle threadHandle = null;
try {
threadHandle = OpenThreadHandle(NativeMethods.THREAD_QUERY_INFORMATION);
if (!NativeMethods.GetThreadTimes(threadHandle,
out threadTimes.create,
out threadTimes.exit,
out threadTimes.kernel,
out threadTimes.user)) {
throw new Win32Exception();
}
}
finally {
CloseThreadHandle(threadHandle);
}
return threadTimes;
}
///
/// Preconditions for accessing properties.
///
///
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