internal void Undo()
{
if (this.thread == null)
{
return;
}
Thread thread = this.thread;
if (this.hecsw != null)
{
HostExecutionContextSwitcher.Undo(this.hecsw);
}
ExecutionContext.Reader executionContextReader = thread.GetExecutionContextReader();
ExecutionContext.Reader reader = this.outerEC;
int num = this.outerECBelongsToScope ? 1 : 0;
thread.SetExecutionContext(reader, num != 0);
if (this.scsw.currSC != null)
{
this.scsw.Undo();
}
if (this.wiIsValid)
{
SecurityContext.RestoreCurrentWI(this.outerEC, executionContextReader, this.wi, this.cachedAlwaysFlowImpersonationPolicy);
}
this.thread = (Thread)null;
ExecutionContext.OnAsyncLocalContextChanged(executionContextReader.DangerousGetRawExecutionContext(), this.outerEC.DangerousGetRawExecutionContext());
}
public void Undo()
{
if (this.thread != null)
{
if (this.thread != Thread.CurrentThread)
{
throw new InvalidOperationException(Environment.GetResourceString("InvalidOperation_CannotUseSwitcherOtherThread"));
}
if (this.currEC != Thread.CurrentThread.GetExecutionContextNoCreate())
{
throw new InvalidOperationException(Environment.GetResourceString("InvalidOperation_SwitcherCtxMismatch"));
}
this.scsw.Undo();
try
{
HostExecutionContextSwitcher.Undo(this.hecsw);
}
finally
{
this.sysw.Undo();
}
Thread.CurrentThread.SetExecutionContext(this.prevEC);
this.thread = null;
}
}
public virtual void Revert(object previousState)
{
HostExecutionContextSwitcher switcher = previousState as HostExecutionContextSwitcher;
if (switcher == null)
{
throw new InvalidOperationException(Environment.GetResourceString("InvalidOperation_CannotOverrideSetWithoutRevert"));
}
ExecutionContext executionContext = Thread.CurrentThread.ExecutionContext;
if (executionContext != switcher.executionContext)
{
throw new InvalidOperationException(Environment.GetResourceString("InvalidOperation_CannotUseSwitcherOtherThread"));
}
switcher.executionContext = null;
if (executionContext.HostExecutionContext != switcher.currentHostContext)
{
throw new InvalidOperationException(Environment.GetResourceString("InvalidOperation_CannotUseSwitcherOtherThread"));
}
HostExecutionContext previousHostContext = switcher.previousHostContext;
if ((CheckIfHosted() && (previousHostContext != null)) && (previousHostContext.State is IUnknownSafeHandle))
{
IUnknownSafeHandle state = (IUnknownSafeHandle)previousHostContext.State;
SetHostSecurityContext(state, false, null);
}
executionContext.HostExecutionContext = previousHostContext;
}
public virtual void Revert(object previousState)
{
HostExecutionContextSwitcher executionContextSwitcher = previousState as HostExecutionContextSwitcher;
if (executionContextSwitcher == null)
{
throw new InvalidOperationException(Environment.GetResourceString("InvalidOperation_CannotOverrideSetWithoutRevert"));
}
ExecutionContext executionContext1 = Thread.CurrentThread.GetMutableExecutionContext();
ExecutionContext executionContext2 = executionContextSwitcher.executionContext;
if (executionContext1 != executionContext2)
{
throw new InvalidOperationException(Environment.GetResourceString("InvalidOperation_CannotUseSwitcherOtherThread"));
}
executionContextSwitcher.executionContext = (ExecutionContext)null;
if (executionContext1.HostExecutionContext != executionContextSwitcher.currentHostContext)
{
throw new InvalidOperationException(Environment.GetResourceString("InvalidOperation_CannotUseSwitcherOtherThread"));
}
HostExecutionContext executionContext3 = executionContextSwitcher.previousHostContext;
if (HostExecutionContextManager.CheckIfHosted() && executionContext3 != null && executionContext3.State is IUnknownSafeHandle)
{
HostExecutionContextManager.SetHostSecurityContext((SafeHandle)executionContext3.State, false, (SafeHandle)null);
}
HostExecutionContext executionContext4 = executionContext3;
executionContext1.HostExecutionContext = executionContext4;
}
public virtual void Revert(object previousState)
{
HostExecutionContextSwitcher hostExecutionContextSwitcher = previousState as HostExecutionContextSwitcher;
if (hostExecutionContextSwitcher == null)
{
throw new InvalidOperationException(Environment.GetResourceString("InvalidOperation_CannotOverrideSetWithoutRevert"));
}
ExecutionContext mutableExecutionContext = Thread.CurrentThread.GetMutableExecutionContext();
if (mutableExecutionContext != hostExecutionContextSwitcher.executionContext)
{
throw new InvalidOperationException(Environment.GetResourceString("InvalidOperation_CannotUseSwitcherOtherThread"));
}
hostExecutionContextSwitcher.executionContext = null;
HostExecutionContext hostExecutionContext = mutableExecutionContext.HostExecutionContext;
if (hostExecutionContext != hostExecutionContextSwitcher.currentHostContext)
{
throw new InvalidOperationException(Environment.GetResourceString("InvalidOperation_CannotUseSwitcherOtherThread"));
}
HostExecutionContext previousHostContext = hostExecutionContextSwitcher.previousHostContext;
if (HostExecutionContextManager.CheckIfHosted() && previousHostContext != null && previousHostContext.State is IUnknownSafeHandle)
{
IUnknownSafeHandle context = (IUnknownSafeHandle)previousHostContext.State;
HostExecutionContextManager.SetHostSecurityContext(context, false, null);
}
mutableExecutionContext.HostExecutionContext = previousHostContext;
}
public virtual void Revert(Object previousState)
{
HostExecutionContextSwitcher hostContextSwitcher = previousState as HostExecutionContextSwitcher;
if (hostContextSwitcher == null)
{
throw new InvalidOperationException(Environment.GetResourceString("InvalidOperation_CannotOverrideSetWithoutRevert"));
}
// check Undo is happening on the correct thread
ExecutionContext executionContext = Thread.CurrentThread.GetMutableExecutionContext();
if (executionContext != hostContextSwitcher.executionContext)
{
throw new InvalidOperationException(Environment.GetResourceString("InvalidOperation_CannotUseSwitcherOtherThread"));
}
hostContextSwitcher.executionContext = null; // Make sure switcher cannot be re-used.
HostExecutionContext revertFromHostContext = executionContext.HostExecutionContext;
// if the current host context is not the same as the one in the switcher, then revert is being called out of order
if (revertFromHostContext != hostContextSwitcher.currentHostContext)
{
throw new InvalidOperationException(Environment.GetResourceString("InvalidOperation_CannotUseSwitcherOtherThread"));
}
// get the previous host context
HostExecutionContext revertToHostContext = hostContextSwitcher.previousHostContext;
// now check if we are hosted and revert the context in the host
if (CheckIfHosted())
{
// try restore the previous context as the current context
if (revertToHostContext != null && revertToHostContext.State is IUnknownSafeHandle)
{
IUnknownSafeHandle unkprevSafeHandle = (IUnknownSafeHandle)revertToHostContext.State;
// call into the Hosting API to set the host context
SetHostSecurityContext(unkprevSafeHandle, false, null);
}
}
//restore the previous host context in the executioncontext
executionContext.HostExecutionContext = revertToHostContext;
}
public virtual object SetHostExecutionContext(HostExecutionContext hostExecutionContext)
{
if (hostExecutionContext == null)
{
throw new InvalidOperationException(Environment.GetResourceString("InvalidOperation_NotNewCaptureContext"));
}
HostExecutionContextSwitcher executionContextSwitcher = new HostExecutionContextSwitcher();
ExecutionContext executionContext = Thread.CurrentThread.GetMutableExecutionContext();
executionContextSwitcher.executionContext = executionContext;
executionContextSwitcher.currentHostContext = hostExecutionContext;
executionContextSwitcher.previousHostContext = (HostExecutionContext)null;
if (HostExecutionContextManager.CheckIfHosted() && hostExecutionContext.State is IUnknownSafeHandle)
{
IUnknownSafeHandle iunknownSafeHandle = new IUnknownSafeHandle();
executionContextSwitcher.previousHostContext = new HostExecutionContext((object)iunknownSafeHandle);
HostExecutionContextManager.SetHostSecurityContext((SafeHandle)hostExecutionContext.State, true, (SafeHandle)iunknownSafeHandle);
}
executionContext.HostExecutionContext = hostExecutionContext;
return((object)executionContextSwitcher);
}
public virtual object SetHostExecutionContext(HostExecutionContext hostExecutionContext)
{
if (hostExecutionContext == null)
{
throw new InvalidOperationException(Environment.GetResourceString("InvalidOperation_NotNewCaptureContext"));
}
HostExecutionContextSwitcher switcher = new HostExecutionContextSwitcher();
ExecutionContext executionContext = Thread.CurrentThread.ExecutionContext;
switcher.executionContext = executionContext;
switcher.currentHostContext = hostExecutionContext;
switcher.previousHostContext = null;
if (CheckIfHosted() && (hostExecutionContext.State is IUnknownSafeHandle))
{
IUnknownSafeHandle state = new IUnknownSafeHandle();
switcher.previousHostContext = new HostExecutionContext(state);
IUnknownSafeHandle context = (IUnknownSafeHandle)hostExecutionContext.State;
SetHostSecurityContext(context, true, state);
}
executionContext.HostExecutionContext = hostExecutionContext;
return(switcher);
}
[System.Security.SecurityCritical] // auto-generated_required
public virtual Object SetHostExecutionContext(HostExecutionContext hostExecutionContext)
{
if (hostExecutionContext == null)
{
throw new InvalidOperationException(Environment.GetResourceString("InvalidOperation_NotNewCaptureContext"));
}
Contract.EndContractBlock();
HostExecutionContextSwitcher switcher = new HostExecutionContextSwitcher();
ExecutionContext currentExecutionContext = Thread.CurrentThread.GetMutableExecutionContext();
switcher.executionContext = currentExecutionContext;
switcher.currentHostContext = hostExecutionContext;
switcher.previousHostContext = null;
if (CheckIfHosted())
{
if (hostExecutionContext.State is IUnknownSafeHandle)
{
// setup the previous unknown handle
IUnknownSafeHandle unkPrevSafeHandle = new IUnknownSafeHandle();
switcher.previousHostContext = new HostExecutionContext(unkPrevSafeHandle);
// get the current handle
IUnknownSafeHandle unkSafeHandle = (IUnknownSafeHandle)hostExecutionContext.State;
// call into the Hosting API to set the host context
// second arg indicates whether we want to retrieve the previous context
SetHostSecurityContext(unkSafeHandle, true, unkPrevSafeHandle);
}
}
// store the current HostExecutionContext in the ExecutionContext.
currentExecutionContext.HostExecutionContext = hostExecutionContext;
return(switcher);
}
public void Undo()
{
if (thread == null)
{
return; // Don't do anything
}
if (thread != Thread.CurrentThread)
{
throw new InvalidOperationException(Environment.GetResourceString("InvalidOperation_CannotUseSwitcherOtherThread"));
}
if (currEC != Thread.CurrentThread.GetExecutionContextNoCreate())
{
throw new InvalidOperationException(Environment.GetResourceString("InvalidOperation_SwitcherCtxMismatch"));
}
BCLDebug.Assert(currEC != null, " ExecutionContext can't be null");
// Any critical failure inside scsw will cause FailFast
scsw.Undo();
try
{
HostExecutionContextSwitcher.Undo(hecsw);
}
finally
{
// Even if HostExecutionContextSwitcher.Undo(hecsw) throws, we need to revert
// synchronizationContext. If that throws, we'll be throwing an ex during an exception
// unwind. That's OK - we'll just have nested exceptions.
sysw.Undo();
}
// restore the saved Execution Context
Thread.CurrentThread.SetExecutionContext(prevEC);
thread = null; // this will prevent the switcher object being used again
}
public virtual object SetHostExecutionContext(HostExecutionContext hostExecutionContext)
{
if (hostExecutionContext == null)
{
throw new InvalidOperationException(Environment.GetResourceString("InvalidOperation_NotNewCaptureContext"));
}
HostExecutionContextSwitcher switcher = new HostExecutionContextSwitcher();
ExecutionContext executionContext = Thread.CurrentThread.ExecutionContext;
switcher.executionContext = executionContext;
switcher.currentHostContext = hostExecutionContext;
switcher.previousHostContext = null;
if (CheckIfHosted() && (hostExecutionContext.State is IUnknownSafeHandle))
{
IUnknownSafeHandle state = new IUnknownSafeHandle();
switcher.previousHostContext = new HostExecutionContext(state);
IUnknownSafeHandle context = (IUnknownSafeHandle) hostExecutionContext.State;
SetHostSecurityContext(context, true, state);
}
executionContext.HostExecutionContext = hostExecutionContext;
return switcher;
}
[System.Security.SecurityCritical] // auto-generated_required
public virtual Object SetHostExecutionContext(HostExecutionContext hostExecutionContext)
{
if (hostExecutionContext == null)
{
throw new InvalidOperationException(Environment.GetResourceString("InvalidOperation_NotNewCaptureContext"));
}
Contract.EndContractBlock();
HostExecutionContextSwitcher switcher = new HostExecutionContextSwitcher();
ExecutionContext currentExecutionContext = Thread.CurrentThread.GetMutableExecutionContext();
switcher.executionContext = currentExecutionContext;
switcher.currentHostContext = hostExecutionContext;
switcher.previousHostContext = null;
if (CheckIfHosted())
{
if (hostExecutionContext.State is IUnknownSafeHandle)
{
// setup the previous unknown handle
IUnknownSafeHandle unkPrevSafeHandle = new IUnknownSafeHandle();
switcher.previousHostContext = new HostExecutionContext(unkPrevSafeHandle);
// get the current handle
IUnknownSafeHandle unkSafeHandle = (IUnknownSafeHandle)hostExecutionContext.State;
// call into the Hosting API to set the host context
// second arg indicates whether we want to retrieve the previous context
SetHostSecurityContext(unkSafeHandle,true,unkPrevSafeHandle);
}
}
// store the current HostExecutionContext in the ExecutionContext.
currentExecutionContext.HostExecutionContext = hostExecutionContext;
return switcher;
}
internal void Undo(Thread currentThread)
{
//
// Don't use an uninitialized switcher, or one that's already been used.
//
if (thread == null)
{
return; // Don't do anything
}
Contract.Assert(currentThread == this.thread);
//
// Restore the HostExecutionContext before restoring the ExecutionContext.
//
#if FEATURE_CAS_POLICY
if (hecsw != null)
{
HostExecutionContextSwitcher.Undo(hecsw);
}
#endif // FEATURE_CAS_POLICY
//
// restore the saved Execution Context. Note that this will also restore the
// SynchronizationContext, Logical/IllogicalCallContext, etc.
//
#if !FEATURE_PAL && FEATURE_IMPERSONATION
ExecutionContext.Reader innerEC = currentThread.GetExecutionContextReader();
#endif
currentThread.SetExecutionContext(outerEC, outerECBelongsToScope);
#if DEBUG
try
{
currentThread.ForbidExecutionContextMutation = true;
#endif
//
// Tell the SecurityContext to do the side-effects of restoration.
//
#if FEATURE_IMPERSONATION || FEATURE_COMPRESSEDSTACK
if (scsw.currSC != null)
{
// Any critical failure inside scsw will cause FailFast
scsw.Undo();
}
#endif // #if FEATURE_IMPERSONATION || FEATURE_COMPRESSEDSTACK
#if !FEATURE_PAL && FEATURE_IMPERSONATION
if (wiIsValid)
{
SecurityContext.RestoreCurrentWI(outerEC, innerEC, wi, cachedAlwaysFlowImpersonationPolicy);
}
#endif
thread = null; // this will prevent the switcher object being used again
#if DEBUG
}
finally
{
currentThread.ForbidExecutionContextMutation = false;
}
#endif
}
